TestSuite

Src/IACore/imp/cpp/AsyncOps.cpp

@@ -139,8 +139,7 @@ auto AsyncOps::wait_for_schedule_completion(Schedule *schedule) -> void {
 }
 
 auto AsyncOps::get_worker_count() -> WorkerId {
-  // +1 for MainThread (Work Stealing)
+  return static_cast<WorkerId>(s_schedule_workers.size());
-  return static_cast<WorkerId>(s_schedule_workers.size() + 1);
 }
 
 auto AsyncOps::schedule_worker_loop(std::stop_token stop_token,

Src/IACore/imp/cpp/CLI.cpp

@@ -15,16 +15,12 @@
 
 #include <IACore/CLI.hpp>
 
-namespace IACore
+namespace IACore {
-{
+CLIParser::CLIParser(Span<const String> args) : m_arg_list(args) {
-    CLIParser::CLIParser(Span<const String> args) : m_argList(args)
+  m_current_arg = m_arg_list.begin();
-    {
-        assert(args.size());
 
-        m_currentArg = m_argList.begin();
+  // Skip executable path
-
+  if (m_current_arg != m_arg_list.end())
-        // Skip executable path
+    m_current_arg++;
-        if (m_currentArg != m_argList.end())
+}
-            m_currentArg++;
-    }
 } // namespace IACore

Src/IACore/imp/cpp/FileOps.cpp

@@ -68,7 +68,7 @@ auto FileOps::map_shared_memory(const String &name, usize size, bool is_owner)
                                (DWORD)(size >> 32), (DWORD)(size & 0xFFFFFFFF),
                                w_name.c_str());
   } else {
-    h_map = OpenFileMappingW(FILE_MAP_ALL_ACCESS, FALSE, w_name.c_str());
+    h_map = OpenFileMappingW(FILE_MAP_ALL_ACCESS, false, w_name.c_str());
   }
 
   if (h_map == NULL) {
@@ -201,7 +201,7 @@ auto FileOps::stream_to_file(const Path &path, bool overwrite)
   if (!overwrite && std::filesystem::exists(path)) {
     return fail("File already exists: {}", path.string());
   }
-  return StreamWriter::create(path);
+  return StreamWriter::create_from_file(path);
 }
 
 auto FileOps::stream_from_file(const Path &path) -> Result<StreamReader> {

Src/IACore/imp/cpp/ProcessOps.cpp

@@ -133,7 +133,7 @@ void ProcessOps::terminate_process(const Box<ProcessHandle> &handle) {
   }
 
 #if IA_PLATFORM_WINDOWS
-  HANDLE h_process = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
+  HANDLE h_process = OpenProcess(PROCESS_TERMINATE, false, pid);
   if (h_process != NULL) {
     ::TerminateProcess(h_process, 9);
     CloseHandle(h_process);
@@ -150,7 +150,7 @@ auto ProcessOps::spawn_process_windows(
     std::atomic<NativeProcessID> &id) -> Result<i32> {
 #if IA_PLATFORM_WINDOWS
   SECURITY_ATTRIBUTES sa_attr = {sizeof(SECURITY_ATTRIBUTES), NULL,
-                                 TRUE}; // Allow inheritance
+                                 true}; // Allow inheritance
   HANDLE h_read = NULL;
   HANDLE h_write = NULL;
 
@@ -174,7 +174,7 @@ auto ProcessOps::spawn_process_windows(
   // Windows command line needs to be mutable and concatenated
   String command_line = std::format("\"{}\" {}", command, args);
 
-  BOOL success = CreateProcessA(NULL, command_line.data(), NULL, NULL, TRUE, 0,
+  BOOL success = CreateProcessA(NULL, command_line.data(), NULL, NULL, true, 0,
                                 NULL, NULL, &si, &pi);
 
   // Close write end in parent, otherwise ReadFile never returns EOF!

Src/IACore/imp/cpp/StreamReader.cpp

@@ -40,6 +40,41 @@ StreamReader::StreamReader(Span<const u8> data)
     : m_data(data.data()), m_data_size(data.size()),
       m_storage_type(StorageType::NonOwning) {}
 
+StreamReader::StreamReader(StreamReader &&other)
+    : m_data(other.m_data), m_cursor(other.m_cursor),
+      m_data_size(other.m_data_size),
+      m_owning_vector(std::move(other.m_owning_vector)),
+      m_storage_type(other.m_storage_type) {
+  other.m_storage_type = StorageType::NonOwning;
+  other.m_data = {};
+  other.m_data_size = 0;
+
+  if (m_storage_type == StorageType::OwningVector)
+    m_data = m_owning_vector.data();
+}
+
+auto StreamReader::operator=(StreamReader &&other) -> StreamReader & {
+  if (this != &other) {
+    if (m_storage_type == StorageType::OwningMmap) {
+      FileOps::unmap_file(m_data);
+    }
+
+    m_data = other.m_data;
+    m_cursor = other.m_cursor;
+    m_data_size = other.m_data_size;
+    m_owning_vector = std::move(other.m_owning_vector);
+    m_storage_type = other.m_storage_type;
+
+    if (m_storage_type == StorageType::OwningVector)
+      m_data = m_owning_vector.data();
+
+    other.m_storage_type = StorageType::NonOwning;
+    other.m_data = {};
+    other.m_data_size = 0;
+  }
+  return *this;
+}
+
 StreamReader::~StreamReader() {
   if (m_storage_type == StorageType::OwningMmap) {
     FileOps::unmap_file(m_data);

Src/IACore/imp/cpp/StreamWriter.cpp

@@ -17,9 +17,7 @@
 
 namespace IACore {
 
-auto StreamWriter::create(const Path &path) -> Result<StreamWriter> {
+auto StreamWriter::create_from_file(const Path &path) -> Result<StreamWriter> {
-  // Try to open the file to ensure we have write permissions and to truncate
-  // it.
   FILE *f = std::fopen(path.string().c_str(), "wb");
   if (!f) {
     return fail("Failed to open file for writing: {}", path.string());
@@ -43,34 +41,97 @@ StreamWriter::StreamWriter(Span<u8> data)
     : m_buffer(data.data()), m_cursor(0), m_capacity(data.size()),
       m_storage_type(StorageType::NonOwning) {}
 
-StreamWriter::~StreamWriter() {
+StreamWriter::StreamWriter(StreamWriter &&other)
-  if (m_storage_type == StorageType::OwningFile) {
+    : m_buffer(other.m_buffer), m_cursor(other.m_cursor),
-    if (m_file_path.empty()) {
+      m_capacity(other.m_capacity), m_file_path(other.m_file_path),
-      return;
+      m_owning_vector(std::move(other.m_owning_vector)),
+      m_storage_type(other.m_storage_type) {
+  other.m_capacity = {};
+  other.m_buffer = {};
+  other.m_storage_type = StorageType::NonOwning;
+
+  if (m_storage_type == StorageType::OwningVector)
+    m_buffer = m_owning_vector.data();
+}
+
+auto StreamWriter::operator=(StreamWriter &&other) -> StreamWriter & {
+  if (this != &other) {
+    // Flush current if needed
+    if (m_storage_type == StorageType::OwningFile) {
+      if (auto res = flush_to_disk(); !res) {
+        std::fprintf(stderr, "[IACore] Data loss in StreamWriter move: %s\n",
+                     res.error().c_str());
+      }
     }
 
-    FILE *f = std::fopen(m_file_path.string().c_str(), "wb");
+    m_buffer = other.m_buffer;
-    if (f) {
+    m_cursor = other.m_cursor;
-      // Write the actual data accumulated in the buffer.
+    m_capacity = other.m_capacity;
-      std::fwrite(m_buffer, 1, m_cursor, f);
+    m_file_path = std::move(other.m_file_path); // Use move for string/path
-      std::fclose(f);
+    m_owning_vector = std::move(other.m_owning_vector);
-    } else {
+    m_storage_type = other.m_storage_type;
-      // Logger is disabled, print to stderr as a fallback for data loss
+
-      // warning.
+    if (m_storage_type == StorageType::OwningVector)
-      std::fprintf(stderr, "[IACore] StreamWriter failed to save file: %s\n",
+      m_buffer = m_owning_vector.data();
-                   m_file_path.string().c_str());
+
+    other.m_capacity = 0;
+    other.m_cursor = 0;
+    other.m_buffer = nullptr;
+    other.m_storage_type = StorageType::NonOwning;
+  }
+  return *this;
+}
+
+StreamWriter::~StreamWriter() {
+  if (m_storage_type == StorageType::OwningFile) {
+    // We can't return errors here, so we log them.
+    // Ideally, the user calls save() before this runs.
+    if (auto res = flush_to_disk(); !res) {
+      std::fprintf(stderr, "[IACore] LOST DATA in ~StreamWriter: %s\n",
+                   res.error().c_str());
     }
   }
 }
 
+auto StreamWriter::flush() -> Result<void> {
+  auto res = flush_to_disk();
+  // Prevent double-write in destructor if save was successful
+  if (res.has_value()) {
+    m_storage_type = StorageType::OwningVector; // downgrade to vector so dtor
+                                                // doesn't write again
+  }
+  return res;
+}
+
+auto StreamWriter::flush_to_disk() -> Result<void> {
+  if (m_storage_type != StorageType::OwningFile || m_file_path.empty()) {
+    return {};
+  }
+
+  FILE *f = std::fopen(m_file_path.string().c_str(), "wb");
+  if (!f) {
+    return fail("Failed to open file for writing: {}", m_file_path.string());
+  }
+
+  usize written = std::fwrite(m_buffer, 1, m_cursor, f);
+  std::fclose(f);
+
+  if (written != m_cursor) {
+    return fail("Incomplete write: {} of {} bytes written", written, m_cursor);
+  }
+  return {};
+}
+
 auto StreamWriter::write(u8 byte, usize count) -> Result<void> {
   if (m_cursor + count > m_capacity) {
     if (m_storage_type == StorageType::NonOwning) {
       return fail("StreamWriter buffer overflow (NonOwning)");
     }
 
-    // Growth strategy: Current capacity + (count * 2)
+    const usize required = m_cursor + count;
-    const usize new_capacity = m_capacity + (count << 1);
+    const usize double_cap = m_capacity * 2;
+    const usize new_capacity = (double_cap > required) ? double_cap : required;
+
     m_owning_vector.resize(new_capacity);
     m_capacity = m_owning_vector.size();
     m_buffer = m_owning_vector.data();
@@ -87,7 +148,12 @@ auto StreamWriter::write(const void *buffer, usize size) -> Result<void> {
       return fail("StreamWriter buffer overflow (NonOwning)");
     }
 
-    const usize new_capacity = m_capacity + (size << 1);
+    // NEW STRATEGY: Max(Double Capacity, Required Size)
+    // This prevents frequent reallocations for repeated small writes
+    const usize required = m_cursor + size;
+    const usize double_cap = m_capacity * 2;
+    const usize new_capacity = (double_cap > required) ? double_cap : required;
+
     m_owning_vector.resize(new_capacity);
     m_capacity = m_owning_vector.size();
     m_buffer = m_owning_vector.data();

Src/IACore/imp/cpp/StringOps.cpp

@@ -16,28 +16,53 @@
 #include <IACore/StringOps.hpp>
 
 namespace IACore {
-const String BASE64_CHAR_TABLE =
+
+static const String BASE64_CHAR_TABLE =
     "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
 
+static auto is_base64(u8 c) -> bool {
+  return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') ||
+         (c >= '0' && c <= '9') || (c == '+') || (c == '/');
+}
+
+static auto get_base64_index(u8 c) -> u8 {
+  if (c >= 'A' && c <= 'Z')
+    return c - 'A';
+  if (c >= 'a' && c <= 'z')
+    return c - 'a' + 26;
+  if (c >= '0' && c <= '9')
+    return c - '0' + 52;
+  if (c == '+')
+    return 62;
+  if (c == '/')
+    return 63;
+  return 0;
+}
+
 auto StringOps::encode_base64(Span<const u8> data) -> String {
   String result;
   result.reserve(((data.size() + 2) / 3) * 4);
-  for (size_t i = 0; i < data.size(); i += 3) {
+
-    uint32_t value = 0;
+  for (usize i = 0; i < data.size(); i += 3) {
-    i32 num_bytes = 0;
+    u32 b0 = data[i];
-    for (i32 j = 0; j < 3 && (i + j) < data.size(); ++j) {
+    u32 b1 = (i + 1 < data.size()) ? data[i + 1] : 0;
-      value = (value << 8) | data[i + j];
+    u32 b2 = (i + 2 < data.size()) ? data[i + 2] : 0;
-      num_bytes++;
+
+    u32 triple = (b0 << 16) | (b1 << 8) | b2;
+
+    result += BASE64_CHAR_TABLE[(triple >> 18) & 0x3F];
+    result += BASE64_CHAR_TABLE[(triple >> 12) & 0x3F];
+
+    if (i + 1 < data.size()) {
+      result += BASE64_CHAR_TABLE[(triple >> 6) & 0x3F];
+    } else {
+      result += '=';
     }
-    for (i32 j = 0; j < num_bytes + 1; ++j) {
+
-      if (j < 4) {
+    if (i + 2 < data.size()) {
-        result += BASE64_CHAR_TABLE[(value >> (6 * (3 - j))) & 0x3F];
+      result += BASE64_CHAR_TABLE[triple & 0x3F];
-      }
+    } else {
-    }
+      result += '=';
-    if (num_bytes < 3) {
-      for (i32 j = 0; j < (3 - num_bytes); ++j) {
-        result += '=';
-      }
     }
   }
   return result;
@@ -45,47 +70,53 @@ auto StringOps::encode_base64(Span<const u8> data) -> String {
 
 auto StringOps::decode_base64(const String &data) -> Vec<u8> {
   Vec<u8> result;
+  result.reserve(data.size() * 3 / 4);
 
-  const auto is_base64 = [](u8 c) {
+  i32 i = 0;
-    return (isalnum(c) || (c == '+') || (c == '/'));
+  u8 tmp_buf[4];
-  };
 
-  i32 in_len = data.size();
+  for (char c_char : data) {
-  i32 i = 0, j = 0, in = 0;
+    u8 c = static_cast<u8>(c_char);
-  u8 tmp_buf0[4], tmp_buf1[3];
+    if (c == '=') {
+      break;
+    }
+    if (!is_base64(c)) {
+      break;
+    }
 
-  while (in_len-- && (data[in] != '=') && is_base64(data[in])) {
+    tmp_buf[i++] = c;
-    tmp_buf0[i++] = data[in];
-    in++;
     if (i == 4) {
-      for (i = 0; i < 4; i++)
+      u8 n0 = get_base64_index(tmp_buf[0]);
-        tmp_buf0[i] = BASE64_CHAR_TABLE.find(tmp_buf0[i]);
+      u8 n1 = get_base64_index(tmp_buf[1]);
+      u8 n2 = get_base64_index(tmp_buf[2]);
+      u8 n3 = get_base64_index(tmp_buf[3]);
 
-      tmp_buf1[0] = (tmp_buf0[0] << 2) + ((tmp_buf0[1] & 0x30) >> 4);
+      result.push_back((n0 << 2) | ((n1 & 0x30) >> 4));
-      tmp_buf1[1] = ((tmp_buf0[1] & 0xf) << 4) + ((tmp_buf0[2] & 0x3c) >> 2);
+      result.push_back(((n1 & 0x0F) << 4) | ((n2 & 0x3C) >> 2));
-      tmp_buf1[2] = ((tmp_buf0[2] & 0x3) << 6) + tmp_buf0[3];
+      result.push_back(((n2 & 0x03) << 6) | n3);
 
-      for (i = 0; (i < 3); i++)
-        result.push_back(tmp_buf1[i]);
       i = 0;
     }
   }
 
-  if (i) {
+  if (i > 0) {
-    for (j = i; j < 4; j++)
+    for (i32 j = i; j < 4; ++j) {
-      tmp_buf0[j] = 0;
+      tmp_buf[j] = 'A'; // Pad with 'A' (index 0)
+    }
 
-    for (j = 0; j < 4; j++)
+    u8 n0 = get_base64_index(tmp_buf[0]);
-      tmp_buf0[j] = BASE64_CHAR_TABLE.find(tmp_buf0[j]);
+    u8 n1 = get_base64_index(tmp_buf[1]);
+    u8 n2 = get_base64_index(tmp_buf[2]);
 
-    tmp_buf1[0] = (tmp_buf0[0] << 2) + ((tmp_buf0[1] & 0x30) >> 4);
+    if (i > 1) {
-    tmp_buf1[1] = ((tmp_buf0[1] & 0xf) << 4) + ((tmp_buf0[2] & 0x3c) >> 2);
+      result.push_back((n0 << 2) | ((n1 & 0x30) >> 4));
-    tmp_buf1[2] = ((tmp_buf0[2] & 0x3) << 6) + tmp_buf0[3];
+    }
-
+    if (i > 2) {
-    for (j = 0; (j < i - 1); j++)
+      result.push_back(((n1 & 0x0F) << 4) | ((n2 & 0x3C) >> 2));
-      result.push_back(tmp_buf1[j]);
+    }
   }
 
   return result;
 }
+
 } // namespace IACore

Src/IACore/inc/IACore/ADT/RingBuffer.hpp

@@ -93,7 +93,7 @@ private:
 // Implementation
 // =============================================================================
 
-auto RingBufferView::default_instance() -> RingBufferView {
+inline auto RingBufferView::default_instance() -> RingBufferView {
   return RingBufferView(nullptr, {}, false);
 }
 
@@ -262,7 +262,7 @@ inline auto RingBufferView::read_wrapped(u32 offset, void *out_data, u32 size)
   }
 }
 
-[[nodiscard]] auto RingBufferView::is_valid() const -> bool {
+[[nodiscard]] inline auto RingBufferView::is_valid() const -> bool {
   return m_control_block && m_data_ptr && m_capacity;
 }
 

Src/IACore/inc/IACore/CLI.hpp

@@ -17,54 +17,47 @@
 
 #include <IACore/PCH.hpp>
 
-namespace IACore
+namespace IACore {
-{
+class CLIParser {
-    class CLIParser
+  /*
-    {
+   * PLEASE READ
-        /*
+   *
-         * PLEASE READ
+   * CLIParser is still very much in it's baby stages.
-         *
+   * Subject to heavy and frequent changes, use with
-         * CLIParser is still very much in it's baby stages.
+   * caution!
-         * Subject to heavy and frequent changes, use with
+   */
-         * caution!
-         */
 
-      public:
+public:
-        CLIParser(Span<const String> args);
+  CLIParser(Span<const String> args);
-        ~CLIParser() = default;
+  ~CLIParser() = default;
 
-      public:
+public:
-        auto remaining() const -> bool
+  [[nodiscard]] auto remaining() const -> bool {
-        {
+    return m_current_arg < m_arg_list.end();
-            return m_currentArg < m_argList.end();
+  }
-        }
 
-        auto peek() const -> StringView
+  [[nodiscard]] auto peek() const -> StringView {
-        {
+    if (!remaining())
-            if (!remaining())
+      return "";
-                return "";
+    return *m_current_arg;
-            return *m_currentArg;
+  }
-        }
 
-        auto next() -> StringView
+  auto next() -> StringView {
-        {
+    if (!remaining())
-            if (!remaining())
+      return "";
-                return "";
+    return *m_current_arg++;
-            return *m_currentArg++;
+  }
-        }
 
-        auto consume(const StringView &expected) -> bool
+  auto consume(const StringView &expected) -> bool {
-        {
+    if (peek() == expected) {
-            if (peek() == expected)
+      next();
-            {
+      return true;
-                next();
+    }
-                return true;
+    return false;
-            }
+  }
-            return false;
-        }
 
-      private:
+private:
-        const Span<const String> m_argList;
+  const Span<const String> m_arg_list;
-        Span<const String>::const_iterator m_currentArg;
+  Span<const String>::const_iterator m_current_arg;
-    };
+};
 } // namespace IACore

Src/IACore/inc/IACore/IATest.hpp

@@ -21,295 +21,271 @@
 // Macros
 // -----------------------------------------------------------------------------
 
-#define __iat_micro_test(call)                                                                                         \
+#define __iat_micro_test(call)                                                 \
-    if (!(call))                                                                                                       \
+  if (!(call))                                                                 \
-    return false
+  return false
 
 #define IAT_CHECK(v) __iat_micro_test(_test((v), #v))
 #define IAT_CHECK_NOT(v) __iat_micro_test(_test_not((v), "NOT " #v))
-#define IAT_CHECK_EQ(lhs, rhs) __iat_micro_test(_test_eq((lhs), (rhs), #lhs " == " #rhs))
+#define IAT_CHECK_EQ(lhs, rhs)                                                 \
-#define IAT_CHECK_NEQ(lhs, rhs) __iat_micro_test(_test_neq((lhs), (rhs), #lhs " != " #rhs))
+  __iat_micro_test(_test_eq((lhs), (rhs), #lhs " == " #rhs))
+#define IAT_CHECK_NEQ(lhs, rhs)                                                \
+  __iat_micro_test(_test_neq((lhs), (rhs), #lhs " != " #rhs))
 
-#define IAT_CHECK_APPROX(lhs, rhs) __iat_micro_test(_test_approx((lhs), (rhs), #lhs " ~= " #rhs))
+#define IAT_CHECK_APPROX(lhs, rhs)                                             \
+  __iat_micro_test(_test_approx((lhs), (rhs), #lhs " ~= " #rhs))
 
 #define IAT_UNIT(func) _test_unit([this]() { return this->func(); }, #func)
 #define IAT_NAMED_UNIT(n, func) _test_unit([this]() { return this->func(); }, n)
 
-#define IAT_BLOCK(name) class name : public ia::iatest::Block
+#define IAT_BLOCK(name) class name : public IACore::Test::Block
 
-#define IAT_BEGIN_BLOCK(_group, _name)                                                                                 \
+#define IAT_BEGIN_BLOCK(_group, _name)                                         \
-    class _group##_##_name : public ia::iatest::Block                                                                  \
+  class _group##_##_name : public IACore::Test::Block {                        \
-    {                                                                                                                  \
+  public:                                                                      \
-      public:                                                                                                          \
+    [[nodiscard]] auto get_name() const -> const char * override {             \
-        [[nodiscard]] auto get_name() const -> const char * override                                                   \
+      return #_group "::" #_name;                                              \
-        {                                                                                                              \
+    }                                                                          \
-            return #_group "::" #_name;                                                                                \
+                                                                               \
-        }                                                                                                              \
-                                                                                                                       \
-      private:
-
-#define IAT_END_BLOCK()                                                                                                \
-    }                                                                                                                  \
-    ;
-
-#define IAT_BEGIN_TEST_LIST()                                                                                          \
-  public:                                                                                                              \
-    void declare_tests() override                                                                                      \
-    {
-#define IAT_ADD_TEST(name) IAT_UNIT(name)
-#define IAT_END_TEST_LIST()                                                                                            \
-    }                                                                                                                  \
-                                                                                                                       \
   private:
 
-namespace IACore
+#define IAT_END_BLOCK()                                                        \
-{
+  }                                                                            \
-    // -------------------------------------------------------------------------
+  ;
-    // String Conversion Helpers
+
-    // -------------------------------------------------------------------------
+#define IAT_BEGIN_TEST_LIST()                                                  \
-    template<typename T> auto to_string(const T &value) -> String
+public:                                                                        \
-    {
+  void declare_tests() override {
-        if constexpr (std::is_arithmetic_v<T>)
+#define IAT_ADD_TEST(name) IAT_UNIT(name)
-        {
+#define IAT_END_TEST_LIST()                                                    \
-            return std::to_string(value);
+  }                                                                            \
-        }
+                                                                               \
-        else if constexpr (std::is_same_v<T, String> || std::is_same_v<T, const char *> || std::is_same_v<T, char *>)
+private:
-        {
+
-            return String("\"") + String(value) + "\"";
+namespace IACore::Test {
-        }
+// -------------------------------------------------------------------------
-        else
+// String Conversion Helpers
-        {
+// -------------------------------------------------------------------------
-            return "{Object}";
+template <typename T> auto to_string(const T &value) -> String {
-        }
+  if constexpr (std::is_arithmetic_v<T>) {
+    return std::to_string(value);
+  } else if constexpr (std::is_same_v<T, String> ||
+                       std::is_same_v<T, const char *> ||
+                       std::is_same_v<T, char *>) {
+    return String("\"") + String(value) + "\"";
+  } else {
+    return "{Object}";
+  }
+}
+
+template <typename T> auto to_string(T *value) -> String {
+  if (value == nullptr) {
+    return "nullptr";
+  }
+  return std::format("ptr({})", static_cast<const void *>(value));
+}
+
+// -------------------------------------------------------------------------
+// Types
+// -------------------------------------------------------------------------
+using TestFunctor = std::function<bool()>;
+
+struct TestUnit {
+  String name;
+  TestFunctor functor;
+};
+
+class Block {
+public:
+  virtual ~Block() = default;
+  [[nodiscard]] virtual auto get_name() const -> const char * = 0;
+  virtual void declare_tests() = 0;
+
+  auto units() -> Vec<TestUnit> & { return m_units; }
+
+protected:
+  template <typename T1, typename T2>
+  auto _test_eq(const T1 &lhs, const T2 &rhs, const char *description) -> bool {
+    if (lhs != rhs) {
+      print_fail(description, to_string(lhs), to_string(rhs));
+      return false;
+    }
+    return true;
+  }
+
+  template <typename T1, typename T2>
+  auto _test_neq(const T1 &lhs, const T2 &rhs, const char *description)
+      -> bool {
+    if (lhs == rhs) {
+      print_fail(description, to_string(lhs), "NOT " + to_string(rhs));
+      return false;
+    }
+    return true;
+  }
+
+  template <typename T>
+  auto _test_approx(T lhs, T rhs, const char *description) -> bool {
+    static_assert(std::is_floating_point_v<T>,
+                  "Approx only works for floats/doubles");
+    T diff = std::abs(lhs - rhs);
+    if (diff > static_cast<T>(0.0001)) {
+      print_fail(description, to_string(lhs), to_string(rhs));
+      return false;
+    }
+    return true;
+  }
+
+  auto _test(bool value, const char *description) -> bool {
+    if (!value) {
+      std::cout << console::BLUE << "    " << description << "... "
+                << console::RED << "FAILED" << console::RESET << "\n";
+      return false;
+    }
+    return true;
+  }
+
+  auto _test_not(bool value, const char *description) -> bool {
+    if (value) {
+      std::cout << console::BLUE << "    " << description << "... "
+                << console::RED << "FAILED" << console::RESET << "\n";
+      return false;
+    }
+    return true;
+  }
+
+  void _test_unit(TestFunctor functor, const char *name) {
+    m_units.push_back({name, std::move(functor)});
+  }
+
+private:
+  void print_fail(const char *desc, const String &v1, const String &v2) {
+    std::cout << console::BLUE << "    " << desc << "... " << console::RED
+              << "FAILED" << console::RESET << "\n";
+    std::cout << console::RED << "      Expected: " << v2 << console::RESET
+              << "\n";
+    std::cout << console::RED << "      Actual:   " << v1 << console::RESET
+              << "\n";
+  }
+
+  Vec<TestUnit> m_units;
+};
+
+template <typename T>
+concept ValidBlockClass = std::derived_from<T, Block>;
+
+// -------------------------------------------------------------------------
+// Runner
+// -------------------------------------------------------------------------
+template <bool StopOnFail = false, bool IsVerbose = false> class Runner {
+public:
+  Runner() = default;
+
+  ~Runner() { summarize(); }
+
+  template <typename BlockClass>
+    requires ValidBlockClass<BlockClass>
+  void test_block();
+
+private:
+  void summarize();
+
+  usize m_test_count{0};
+  usize m_fail_count{0};
+  usize m_block_count{0};
+};
+
+template <bool StopOnFail, bool IsVerbose>
+template <typename BlockClass>
+  requires ValidBlockClass<BlockClass>
+void Runner<StopOnFail, IsVerbose>::test_block() {
+  m_block_count++;
+  BlockClass b;
+  b.declare_tests();
+
+  std::cout << console::MAGENTA << "Testing [" << b.get_name() << "]..."
+            << console::RESET << "\n";
+
+  for (auto &v : b.units()) {
+    m_test_count++;
+    if constexpr (IsVerbose) {
+      std::cout << console::YELLOW << "  Testing " << v.name << "...\n"
+                << console::RESET;
     }
 
-    template<typename T> auto to_string(T *value) -> String
+    // Exceptions are DISABLED. We assume tests do not crash.
-    {
+    // If a test crashes (segfault), the OS handles it.
-        if (value == nullptr)
+    bool result = v.functor();
-        {
+
-            return "nullptr";
+    if (!result) {
-        }
+      m_fail_count++;
-        return std::format("ptr({})", static_cast<const void *>(value));
+      if constexpr (StopOnFail) {
+        summarize();
+        std::exit(-1);
+      }
+    }
+  }
+  std::cout << "\n";
+}
+
+template <bool StopOnFail, bool IsVerbose>
+void Runner<StopOnFail, IsVerbose>::summarize() {
+  std::cout << console::GREEN
+            << "\n-----------------------------------\n\t      "
+               "SUMMARY\n-----------------------------------\n";
+
+  if (m_fail_count == 0) {
+    std::cout << "\n\tALL TESTS PASSED!\n\n";
+  } else {
+    f64 success_rate = (100.0 * static_cast<f64>(m_test_count - m_fail_count) /
+                        static_cast<f64>(m_test_count));
+    std::cout << console::RED << m_fail_count << " OF " << m_test_count
+              << " TESTS FAILED\n"
+              << console::YELLOW
+              << std::format("Success Rate: {:.2f}%\n", success_rate);
+  }
+
+  std::cout << console::MAGENTA << "Ran " << m_test_count << " test(s) across "
+            << m_block_count << " block(s)\n"
+            << console::GREEN << "-----------------------------------"
+            << console::RESET << "\n";
+}
+
+using DefaultRunner = Runner<false, true>;
+
+// -------------------------------------------------------------------------
+// Registry
+// -------------------------------------------------------------------------
+class TestRegistry {
+public:
+  using TestEntry = std::function<void(DefaultRunner &)>;
+
+  static auto get_entries() -> Vec<TestEntry> & {
+    static Vec<TestEntry> entries;
+    return entries;
+  }
+
+  static auto run_all() -> i32 {
+    DefaultRunner r;
+    auto &entries = get_entries();
+    std::cout << console::CYAN << "[IATest] Discovered " << entries.size()
+              << " Test Blocks\n\n"
+              << console::RESET;
+
+    for (auto &entry : entries) {
+      entry(r);
     }
 
-    // -------------------------------------------------------------------------
+    return 0;
-    // Types
+  }
-    // -------------------------------------------------------------------------
+};
-    using TestFunctor = std::function<bool()>;
 
-    struct TestUnit
+template <typename BlockType> struct AutoRegister {
-    {
+  AutoRegister() {
-        String name;
+    TestRegistry::get_entries().push_back(
-        TestFunctor functor;
+        [](DefaultRunner &r) { r.test_block<BlockType>(); });
-    };
+  }
+};
+} // namespace IACore::Test
 
-    class Block
+#define IAT_REGISTER_ENTRY(Group, Name)                                        \
-    {
+  static IACore::Test::AutoRegister<Group##_##Name> _iat_reg_##Group##_##Name;
-      public:
-        virtual ~Block() = default;
-        [[nodiscard]] virtual auto get_name() const -> const char * = 0;
-        virtual void declare_tests() = 0;
-
-        auto units() -> Vec<TestUnit> &
-        {
-            return m_units;
-        }
-
-      protected:
-        template<typename T1, typename T2> auto _test_eq(const T1 &lhs, const T2 &rhs, const char *description) -> bool
-        {
-            if (lhs != rhs)
-            {
-                print_fail(description, to_string(lhs), to_string(rhs));
-                return false;
-            }
-            return true;
-        }
-
-        template<typename T1, typename T2> auto _test_neq(const T1 &lhs, const T2 &rhs, const char *description) -> bool
-        {
-            if (lhs == rhs)
-            {
-                print_fail(description, to_string(lhs), "NOT " + to_string(rhs));
-                return false;
-            }
-            return true;
-        }
-
-        template<typename T> auto _test_approx(T lhs, T rhs, const char *description) -> bool
-        {
-            static_assert(std::is_floating_point_v<T>, "Approx only works for floats/doubles");
-            T diff = std::abs(lhs - rhs);
-            if (diff > static_cast<T>(0.0001))
-            {
-                print_fail(description, to_string(lhs), to_string(rhs));
-                return false;
-            }
-            return true;
-        }
-
-        auto _test(bool value, const char *description) -> bool
-        {
-            if (!value)
-            {
-                std::cout << console::blue << "    " << description << "... " << console::red << "FAILED"
-                          << console::reset << "\n";
-                return false;
-            }
-            return true;
-        }
-
-        auto _test_not(bool value, const char *description) -> bool
-        {
-            if (value)
-            {
-                std::cout << console::blue << "    " << description << "... " << console::red << "FAILED"
-                          << console::reset << "\n";
-                return false;
-            }
-            return true;
-        }
-
-        void _test_unit(TestFunctor functor, const char *name)
-        {
-            m_units.push_back({name, std::move(functor)});
-        }
-
-      private:
-        void print_fail(const char *desc, const String &v1, const String &v2)
-        {
-            std::cout << console::blue << "    " << desc << "... " << console::red << "FAILED" << console::reset
-                      << "\n";
-            std::cout << console::red << "      Expected: " << v2 << console::reset << "\n";
-            std::cout << console::red << "      Actual:   " << v1 << console::reset << "\n";
-        }
-
-        Vec<TestUnit> m_units;
-    };
-
-    template<typename T>
-    concept ValidBlockClass = std::derived_from<T, Block>;
-
-    // -------------------------------------------------------------------------
-    // Runner
-    // -------------------------------------------------------------------------
-    template<bool StopOnFail = false, bool IsVerbose = false> class Runner
-    {
-      public:
-        Runner() = default;
-
-        ~Runner()
-        {
-            summarize();
-        }
-
-        template<typename BlockClass>
-            requires ValidBlockClass<BlockClass>
-        void test_block();
-
-      private:
-        void summarize();
-
-        usize m_test_count{0};
-        usize m_fail_count{0};
-        usize m_block_count{0};
-    };
-
-    template<bool StopOnFail, bool IsVerbose>
-    template<typename BlockClass>
-        requires ValidBlockClass<BlockClass>
-    void Runner<StopOnFail, IsVerbose>::test_block()
-    {
-        m_block_count++;
-        BlockClass b;
-        b.declare_tests();
-
-        std::cout << console::magenta << "Testing [" << b.get_name() << "]..." << console::reset << "\n";
-
-        for (auto &v : b.units())
-        {
-            m_test_count++;
-            if constexpr (IsVerbose)
-            {
-                std::cout << console::yellow << "  Testing " << v.name << "...\n" << console::reset;
-            }
-
-            // Exceptions are DISABLED. We assume tests do not crash.
-            // If a test crashes (segfault), the OS handles it.
-            bool result = v.functor();
-
-            if (!result)
-            {
-                m_fail_count++;
-                if constexpr (StopOnFail)
-                {
-                    summarize();
-                    std::exit(-1);
-                }
-            }
-        }
-        std::cout << "\n";
-    }
-
-    template<bool StopOnFail, bool IsVerbose> void Runner<StopOnFail, IsVerbose>::summarize()
-    {
-        std::cout << console::green
-                  << "\n-----------------------------------\n\t      SUMMARY\n-----------------------------------\n";
-
-        if (m_fail_count == 0)
-        {
-            std::cout << "\n\tALL TESTS PASSED!\n\n";
-        }
-        else
-        {
-            f64 success_rate = (100.0 * static_cast<f64>(m_test_count - m_fail_count) / static_cast<f64>(m_test_count));
-            std::cout << console::red << m_fail_count << " OF " << m_test_count << " TESTS FAILED\n"
-                      << console::yellow << std::format("Success Rate: {:.2f}%\n", success_rate);
-        }
-
-        std::cout << console::magenta << "Ran " << m_test_count << " test(s) across " << m_block_count << " block(s)\n"
-                  << console::green << "-----------------------------------" << console::reset << "\n";
-    }
-
-    using DefaultRunner = Runner<false, true>;
-
-    // -------------------------------------------------------------------------
-    // Registry
-    // -------------------------------------------------------------------------
-    class TestRegistry
-    {
-      public:
-        using TestEntry = std::function<void(DefaultRunner &)>;
-
-        static auto get_entries() -> Vec<TestEntry> &
-        {
-            static Vec<TestEntry> entries;
-            return entries;
-        }
-
-        static auto run_all() -> i32
-        {
-            DefaultRunner r;
-            auto &entries = get_entries();
-            std::cout << console::cyan << "[IATest] Discovered " << entries.size() << " Test Blocks\n\n"
-                      << console::reset;
-
-            for (auto &entry : entries)
-            {
-                entry(r);
-            }
-
-            return 0;
-        }
-    };
-
-    template<typename BlockType> struct AutoRegister
-    {
-        AutoRegister()
-        {
-            TestRegistry::get_entries().push_back([](DefaultRunner &r) { r.test_block<BlockType>(); });
-        }
-    };
-} // namespace IACore
-
-#define IAT_REGISTER_ENTRY(Group, Name) static ia::iatest::AutoRegister<Group##_##Name> _iat_reg_##Group##_##Name;

Src/IACore/inc/IACore/JSON.hpp

@@ -119,8 +119,8 @@ inline auto Json::encode(const nlohmann::json &data) -> String {
 template <typename T>
 inline auto Json::parse_to_struct(const String &json_str) -> Result<T> {
   T result{};
-  // glz::read_json returns an error code (bool-like optional)
+
-  const auto err = glz::read_json<GLAZE_OPTS>(result, json_str);
+  const auto err = glz::read<GLAZE_OPTS>(result, json_str);
 
   if (err) {
     return fail("JSON Struct Parse Error: {}",

Src/IACore/inc/IACore/StreamReader.hpp

@@ -34,8 +34,8 @@ public:
   explicit StreamReader(Span<const u8> data);
   ~StreamReader();
 
-  StreamReader(StreamReader &&) = default;
+  StreamReader(StreamReader &&other);
-  auto operator=(StreamReader &&) -> StreamReader & = default;
+  auto operator=(StreamReader &&other) -> StreamReader &;
 
   StreamReader(const StreamReader &) = delete;
   auto operator=(const StreamReader &) -> StreamReader & = delete;
@@ -86,6 +86,9 @@ inline auto StreamReader::read(void *buffer, usize size) -> Result<void> {
 template <typename T>
 [[nodiscard("Check for EOF")]]
 inline auto StreamReader::read() -> Result<T> {
+  static_assert(std::is_trivially_copyable_v<T>,
+                "T must be trivially copyable to read via memcpy");
+
   constexpr usize SIZE = sizeof(T);
 
   if (m_cursor + SIZE > m_data_size) [[unlikely]] {

Src/IACore/inc/IACore/StreamWriter.hpp

@@ -27,18 +27,19 @@ public:
     OwningVector,
   };
 
-  static auto create(const Path &path) -> Result<StreamWriter>;
+  static auto create_from_file(const Path &path) -> Result<StreamWriter>;
 
   StreamWriter();
   explicit StreamWriter(Span<u8> data);
-  ~StreamWriter();
 
-  StreamWriter(StreamWriter &&) = default;
+  StreamWriter(StreamWriter &&other);
-  auto operator=(StreamWriter &&) -> StreamWriter & = default;
+  auto operator=(StreamWriter &&other) -> StreamWriter &;
 
   StreamWriter(const StreamWriter &) = delete;
   auto operator=(const StreamWriter &) -> StreamWriter & = delete;
 
+  ~StreamWriter();
+
   auto write(u8 byte, usize count) -> Result<void>;
   auto write(const void *buffer, usize size) -> Result<void>;
 
@@ -48,6 +49,8 @@ public:
 
   [[nodiscard]] auto cursor() const -> usize { return m_cursor; }
 
+  auto flush() -> Result<void>;
+
 private:
   u8 *m_buffer = nullptr;
   usize m_cursor = 0;
@@ -55,6 +58,9 @@ private:
   Path m_file_path;
   Vec<u8> m_owning_vector;
   StorageType m_storage_type = StorageType::OwningVector;
+
+private:
+  auto flush_to_disk() -> Result<void>;
 };
 
 template <typename T>

Tests/CMakeLists.txt

@@ -1,4 +1,4 @@
 
-#add_subdirectory(Subjects/)
+add_subdirectory(Subjects/)
-#add_subdirectory(Unit/)
+add_subdirectory(Unit/)
-#add_subdirectory(Regression/)
+add_subdirectory(Regression/)

Tests/Unit/AsyncOps.cpp

@@ -0,0 +1,206 @@
+// IACore-OSS; The Core Library for All IA Open Source Projects
+// Copyright (C) 2026 IAS (ias@iasoft.dev)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <IACore/AsyncOps.hpp>
+#include <IACore/IATest.hpp>
+#include <chrono>
+#include <thread>
+
+using namespace IACore;
+
+// -----------------------------------------------------------------------------
+// Helper: RAII Scheduler Guard
+// -----------------------------------------------------------------------------
+// Ensures the scheduler is terminated at the end of a test scope,
+// preventing state pollution between tests.
+struct SchedulerGuard {
+  SchedulerGuard(u8 worker_count = 2) {
+    // We ignore the result here as we assume the test environment is clean.
+    // Specific initialization tests will check the result manually.
+    (void)AsyncOps::initialize_scheduler(worker_count);
+  }
+
+  ~SchedulerGuard() { AsyncOps::terminate_scheduler(); }
+};
+
+// -----------------------------------------------------------------------------
+// Test Block Definition
+// -----------------------------------------------------------------------------
+
+IAT_BEGIN_BLOCK(Core, AsyncOps)
+
+// -------------------------------------------------------------------------
+// 1. Initialization and Termination
+// -------------------------------------------------------------------------
+auto test_initialization() -> bool {
+  // Ensure clean state
+  AsyncOps::terminate_scheduler();
+
+  // Initialize with specific worker countB
+  const auto res = AsyncOps::initialize_scheduler(4);
+  IAT_CHECK(res.has_value());
+
+  IAT_CHECK_EQ(AsyncOps::get_worker_count(), static_cast<u16>(4));
+
+  // Terminate
+  AsyncOps::terminate_scheduler();
+
+  // Verify we can re-initialize
+  const auto res2 = AsyncOps::initialize_scheduler(1);
+  IAT_CHECK(res2.has_value());
+  IAT_CHECK_EQ(AsyncOps::get_worker_count(), static_cast<u16>(1));
+
+  AsyncOps::terminate_scheduler();
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 2. Basic Task Execution
+// -------------------------------------------------------------------------
+auto test_basic_execution() -> bool {
+  SchedulerGuard guard(2);
+
+  AsyncOps::Schedule schedule;
+  std::atomic<i32> run_count{0};
+
+  // Schedule a simple task
+  AsyncOps::schedule_task([&](AsyncOps::WorkerId) { run_count++; }, 0,
+                          &schedule);
+
+  // Wait for it to finish
+  AsyncOps::wait_for_schedule_completion(&schedule);
+
+  IAT_CHECK_EQ(run_count.load(), 1);
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 3. Concurrency and Load
+// -------------------------------------------------------------------------
+auto test_concurrency() -> bool {
+  SchedulerGuard guard(4);
+
+  AsyncOps::Schedule schedule;
+  std::atomic<i32> run_count{0};
+  const i32 total_tasks = 100;
+
+  for (i32 i = 0; i < total_tasks; ++i) {
+    AsyncOps::schedule_task(
+        [&](AsyncOps::WorkerId) {
+          // Simulate a tiny bit of work to encourage thread switching
+          std::this_thread::sleep_for(std::chrono::microseconds(10));
+          run_count++;
+        },
+        0, &schedule);
+  }
+
+  AsyncOps::wait_for_schedule_completion(&schedule);
+
+  IAT_CHECK_EQ(run_count.load(), total_tasks);
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 4. Priorities
+// -------------------------------------------------------------------------
+auto test_priorities() -> bool {
+  SchedulerGuard guard(2);
+  AsyncOps::Schedule schedule;
+  std::atomic<i32> high_priority_ran{0};
+  std::atomic<i32> normal_priority_ran{0};
+
+  // Verify API accepts priorities and executes them.
+  // Note: Deterministic priority testing is difficult in unit tests without
+  // mocking, so we primarily ensure the API functions correctly.
+
+  AsyncOps::schedule_task([&](AsyncOps::WorkerId) { high_priority_ran++; }, 0,
+                          &schedule, AsyncOps::Priority::High);
+
+  AsyncOps::schedule_task([&](AsyncOps::WorkerId) { normal_priority_ran++; }, 0,
+                          &schedule, AsyncOps::Priority::Normal);
+
+  AsyncOps::wait_for_schedule_completion(&schedule);
+
+  IAT_CHECK_EQ(high_priority_ran.load(), 1);
+  IAT_CHECK_EQ(normal_priority_ran.load(), 1);
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 5. Fire-and-Forget Tasks
+// -------------------------------------------------------------------------
+auto test_run_task_fire_and_forget() -> bool {
+  SchedulerGuard guard(2);
+
+  std::atomic<bool> executed{false};
+
+  // run_task doesn't use a Schedule object, so we must sync manually
+  AsyncOps::run_task([&]() { executed = true; });
+
+  // Busy wait with timeout (max 1 second)
+  for (int i = 0; i < 100; ++i) {
+    if (executed.load())
+      break;
+    std::this_thread::sleep_for(std::chrono::milliseconds(10));
+  }
+
+  IAT_CHECK(executed.load());
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 6. Cancellation Safety
+// -------------------------------------------------------------------------
+auto test_cancellation_safety() -> bool {
+  SchedulerGuard guard(2);
+
+  // 1. Cancel non-existent tag (Should be safe)
+  AsyncOps::cancel_tasks_of_tag(999);
+
+  AsyncOps::Schedule schedule;
+  std::atomic<i32> counter{0};
+
+  // 2. Schedule a task, wait for it
+  AsyncOps::schedule_task([&](AsyncOps::WorkerId) { counter++; }, 10,
+                          &schedule);
+
+  AsyncOps::wait_for_schedule_completion(&schedule);
+  IAT_CHECK_EQ(counter.load(), 1);
+
+  // 3. Cancel tag 10 (already done, should be safe)
+  AsyncOps::cancel_tasks_of_tag(10);
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// Registration
+// -------------------------------------------------------------------------
+IAT_BEGIN_TEST_LIST()
+IAT_ADD_TEST(test_initialization);
+IAT_ADD_TEST(test_basic_execution);
+IAT_ADD_TEST(test_concurrency);
+IAT_ADD_TEST(test_priorities);
+IAT_ADD_TEST(test_run_task_fire_and_forget);
+IAT_ADD_TEST(test_cancellation_safety);
+IAT_END_TEST_LIST()
+
+IAT_END_BLOCK()
+
+IAT_REGISTER_ENTRY(Core, AsyncOps)

Tests/Unit/CCompile.c

@@ -1,40 +0,0 @@
-// IACore-OSS; The Core Library for All IA Open Source Projects
-// Copyright (C) 2026 IAS (ias@iasoft.dev)
-//
-// This program is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-#if defined(__cplusplus)
-#error "CRITICAL: This file MUST be compiled as C to test ABI compatibility."
-#endif
-
-#include <IACore/IACore.hpp>
-
-#if TRUE != 1
-#error "TRUE macro is broken in C mode"
-#endif
-
-int main(void)
-{
-    IA_VERSION_TYPE version = IA_MAKE_VERSION(1, 0, 0);
-
-    IA_ASSERT(version > 0);
-
-    UNUSED(version);
-
-    int32_t myNumber = 10;
-
-    (void)myNumber;
-
-    return 0;
-}

Tests/Unit/CLI.cpp

@@ -0,0 +1,134 @@
+// IACore-OSS; The Core Library for All IA Open Source Projects
+// Copyright (C) 2026 IAS (ias@iasoft.dev)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <IACore/CLI.hpp>
+#include <IACore/IATest.hpp>
+
+using namespace IACore;
+
+// -----------------------------------------------------------------------------
+// Test Block Definition
+// -----------------------------------------------------------------------------
+
+IAT_BEGIN_BLOCK(Core, CLI)
+
+// -------------------------------------------------------------------------
+// 1. Basic Traversal
+// -------------------------------------------------------------------------
+auto test_basic_traversal() -> bool {
+  const Vec<String> args = {"ignored", "one", "two", "three"};
+  CLIParser parser(args);
+
+  IAT_CHECK(parser.remaining());
+
+  // Check sequential access
+  IAT_CHECK_EQ(String(parser.next()), "one");
+  IAT_CHECK(parser.remaining());
+
+  IAT_CHECK_EQ(String(parser.next()), "two");
+  IAT_CHECK(parser.remaining());
+
+  IAT_CHECK_EQ(String(parser.next()), "three");
+
+  // Should be exhausted now
+  IAT_CHECK_NOT(parser.remaining());
+
+  // Next on exhausted returns empty string view
+  IAT_CHECK_EQ(String(parser.next()), "");
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 2. Peek Functionality
+// -------------------------------------------------------------------------
+auto test_peek() -> bool {
+  const Vec<String> args = {"ignored", "peek_val", "next_val"};
+  CLIParser parser(args);
+
+  // Peek should return value but not advance
+  IAT_CHECK_EQ(String(parser.peek()), "peek_val");
+  IAT_CHECK(parser.remaining());
+
+  // Verify we are still at the same element
+  IAT_CHECK_EQ(String(parser.next()), "peek_val");
+
+  // Now we should be at next_val
+  IAT_CHECK_EQ(String(parser.peek()), "next_val");
+  IAT_CHECK_EQ(String(parser.next()), "next_val");
+
+  IAT_CHECK_NOT(parser.remaining());
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 3. Consume Functionality
+// -------------------------------------------------------------------------
+auto test_consume() -> bool {
+  const Vec<String> args = {"ignored", "-v", "--output", "file.txt"};
+  CLIParser parser(args);
+
+  // 1. Try consuming something that isn't there
+  IAT_CHECK_NOT(parser.consume("-x"));
+
+  // Verify we haven't moved
+  IAT_CHECK_EQ(String(parser.peek()), "-v");
+
+  // 2. Consume the correct flag
+  IAT_CHECK(parser.consume("-v"));
+
+  // 3. Verify advancement
+  IAT_CHECK_EQ(String(parser.peek()), "--output");
+
+  // 4. Consume next
+  IAT_CHECK(parser.consume("--output"));
+
+  // 5. Verify final argument
+  IAT_CHECK_EQ(String(parser.next()), "file.txt");
+
+  IAT_CHECK_NOT(parser.remaining());
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 4. Empty Argument List
+// -------------------------------------------------------------------------
+auto test_empty() -> bool {
+  const Vec<String> args = {};
+  CLIParser parser(args);
+
+  IAT_CHECK_NOT(parser.remaining());
+  IAT_CHECK_EQ(String(parser.peek()), "");
+  IAT_CHECK_EQ(String(parser.next()), "");
+  IAT_CHECK_NOT(parser.consume("-help"));
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// Registration
+// -------------------------------------------------------------------------
+IAT_BEGIN_TEST_LIST()
+IAT_ADD_TEST(test_basic_traversal);
+IAT_ADD_TEST(test_peek);
+IAT_ADD_TEST(test_consume);
+IAT_ADD_TEST(test_empty);
+IAT_END_TEST_LIST()
+
+IAT_END_BLOCK()
+
+IAT_REGISTER_ENTRY(Core, CLI)

Tests/Unit/CMakeLists.txt

@@ -1,25 +1,25 @@
-# ------------------------------------------------
-#   C Compile Test (Keep separate to verify C ABI)
-# ------------------------------------------------
-add_executable(IACore_Test_C_ABI "CCompile.c")
-set_target_properties(IACore_Test_C_ABI PROPERTIES
-    C_STANDARD 99           
-    C_STANDARD_REQUIRED ON
-    LINKER_LANGUAGE C      
-)
-target_link_libraries(IACore_Test_C_ABI PRIVATE IACore)
-
 # ------------------------------------------------
 #   The Unified C++ Test Suite
 # ------------------------------------------------
 set(TEST_SOURCES
-    Main.cpp
+    AsyncOps.cpp
-    Utils.cpp
+    CLI.cpp
-    Environment.cpp
     DataOps.cpp
+    Environment.cpp
+    FileOps.cpp
+    IPC.cpp
+    JSON.cpp
+    Logger.cpp
+    Main.cpp
+    Platform.cpp
     ProcessOps.cpp
-    StreamReader.cpp
     RingBuffer.cpp
+    SocketOps.cpp
+    StreamReader.cpp
+    StreamWriter.cpp
+    StringOps.cpp
+    Utils.cpp
+    XML.cpp
 
     SIMD/IntVec4.cpp
     SIMD/FloatVec4.cpp

Tests/Unit/DataOps.cpp

@@ -14,7 +14,6 @@
 // limitations under the License.
 
 #include <IACore/DataOps.hpp>
-
 #include <IACore/IATest.hpp>
 
 using namespace IACore;
@@ -25,87 +24,90 @@ using namespace IACore;
 
 IAT_BEGIN_BLOCK(Core, DataOps)
 
-bool TestCRC32() {
+auto test_crc32() -> bool {
   {
-    String s = "123456789";
+    const String s = "123456789";
-    Span<const u8> span(reinterpret_cast<const u8 *>(s.data()), s.size());
+    const Span<const u8> span(reinterpret_cast<const u8 *>(s.data()), s.size());
-    u32 result = DataOps::CRC32(span);
+    const u32 result = DataOps::crc32(span);
 
     IAT_CHECK_EQ(result, 0xE3069283);
   }
 
   {
-    u32 result = DataOps::CRC32({});
+    const u32 result = DataOps::crc32({});
     IAT_CHECK_EQ(result, 0U);
   }
 
   {
-    std::vector<u8> buffer(33);
+    Vec<u8> buffer(33);
-    for (size_t i = 1; i < 33; ++i)
+    for (usize i = 1; i < 33; ++i) {
-      buffer[i] = (u8)i;
+      buffer[i] = static_cast<u8>(i);
+    }
 
-    std::vector<u8> refData(32);
+    Vec<u8> ref_data(32);
-    for (size_t i = 0; i < 32; ++i)
+    for (usize i = 0; i < 32; ++i) {
-      refData[i] = (u8)(i + 1);
+      ref_data[i] = static_cast<u8>(i + 1);
+    }
 
-    u32 hashRef =
+    const u32 hash_ref =
-        DataOps::CRC32(Span<const u8>(refData.data(), refData.size()));
+        DataOps::crc32(Span<const u8>(ref_data.data(), ref_data.size()));
 
-    u32 hashUnaligned = DataOps::CRC32(Span<const u8>(buffer.data() + 1, 32));
+    const u32 hash_unaligned =
+        DataOps::crc32(Span<const u8>(buffer.data() + 1, 32));
 
-    IAT_CHECK_EQ(hashRef, hashUnaligned);
+    IAT_CHECK_EQ(hash_ref, hash_unaligned);
   }
 
-  return TRUE;
+  return true;
 }
 
-bool TestHash_xxHash() {
+auto test_hash_xxhash() -> bool {
   {
-    String s = "123456789";
+    const String s = "123456789";
-    u32 result = DataOps::Hash_xxHash(s);
+    const u32 result = DataOps::hash_xxhash(s);
     IAT_CHECK_EQ(result, 0x937bad67);
   }
 
   {
-    String s = "The quick brown fox jumps over the lazy dog";
+    const String s = "The quick brown fox jumps over the lazy dog";
-    u32 result = DataOps::Hash_xxHash(s);
+    const u32 result = DataOps::hash_xxhash(s);
     IAT_CHECK_EQ(result, 0xE85EA4DE);
   }
 
   {
-    String s = "Test";
+    const String s = "Test";
-    u32 r1 = DataOps::Hash_xxHash(s);
+    const u32 r1 = DataOps::hash_xxhash(s);
-    u32 r2 =
+    const u32 r2 = DataOps::hash_xxhash(
-        DataOps::Hash_xxHash(Span<const u8>((const u8 *)s.data(), s.size()));
+        Span<const u8>(reinterpret_cast<const u8 *>(s.data()), s.size()));
     IAT_CHECK_EQ(r1, r2);
   }
 
-  return TRUE;
+  return true;
 }
 
-bool TestHash_FNV1A() {
+auto test_hash_fnv1a() -> bool {
   {
-    String s = "123456789";
+    const String s = "123456789";
-    u32 result =
+    const u32 result = DataOps::hash_fnv1a(
-        DataOps::Hash_FNV1A(Span<const u8>((const u8 *)s.data(), s.size()));
+        Span<const u8>(reinterpret_cast<const u8 *>(s.data()), s.size()));
     IAT_CHECK_EQ(result, 0xbb86b11c);
   }
 
   {
-    u32 result = DataOps::Hash_FNV1A(Span<const u8>{});
+    const u32 result = DataOps::hash_fnv1a(Span<const u8>{});
     IAT_CHECK_EQ(result, 0x811C9DC5);
   }
 
-  return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // Registration
 // -------------------------------------------------------------------------
 IAT_BEGIN_TEST_LIST()
-IAT_ADD_TEST(TestCRC32);
+IAT_ADD_TEST(test_crc32);
-IAT_ADD_TEST(TestHash_FNV1A);
+IAT_ADD_TEST(test_hash_fnv1a);
-IAT_ADD_TEST(TestHash_xxHash);
+IAT_ADD_TEST(test_hash_xxhash);
 IAT_END_TEST_LIST()
 
 IAT_END_BLOCK()

Tests/Unit/Environment.cpp

@@ -14,7 +14,6 @@
 // limitations under the License.
 
 #include <IACore/Environment.hpp>
-
 #include <IACore/IATest.hpp>
 
 using namespace IACore;
@@ -22,8 +21,8 @@ using namespace IACore;
 // -----------------------------------------------------------------------------
 // Constants
 // -----------------------------------------------------------------------------
-static const char *TEST_KEY = "IA_TEST_ENV_VAR_12345";
+static constexpr const char *TEST_KEY = "IA_TEST_ENV_VAR_12345";
-static const char *TEST_VAL = "Hello World";
+static constexpr const char *TEST_VAL = "Hello World";
 
 // -----------------------------------------------------------------------------
 // Test Block Definition
@@ -34,87 +33,83 @@ IAT_BEGIN_BLOCK(Core, Environment)
 // -------------------------------------------------------------------------
 // 1. Basic Set and Get (The Happy Path)
 // -------------------------------------------------------------------------
-bool TestBasicCycle()
+auto test_basic_cycle() -> bool {
-{
+  // 1. Ensure clean slate
-    // 1. Ensure clean slate
+  (void)Environment::unset(TEST_KEY);
-    Environment::Unset(TEST_KEY);
+  IAT_CHECK_NOT(Environment::exists(TEST_KEY));
-    IAT_CHECK_NOT(Environment::Exists(TEST_KEY));
 
-    // 2. Set
+  // 2. Set
-    bool setRes = Environment::Set(TEST_KEY, TEST_VAL);
+  const auto set_res = Environment::set(TEST_KEY, TEST_VAL);
-    IAT_CHECK(setRes);
+  IAT_CHECK(set_res.has_value());
-    IAT_CHECK(Environment::Exists(TEST_KEY));
+  IAT_CHECK(Environment::exists(TEST_KEY));
 
-    // 3. Find (Optional)
+  // 3. Find (Optional)
-    auto opt = Environment::Find(TEST_KEY);
+  const auto opt = Environment::find(TEST_KEY);
-    IAT_CHECK(opt.has_value());
+  IAT_CHECK(opt.has_value());
-    IAT_CHECK_EQ(*opt, String(TEST_VAL));
+  IAT_CHECK_EQ(*opt, String(TEST_VAL));
 
-    // 4. Get (Direct)
+  // 4. Get (Direct)
-    String val = Environment::Get(TEST_KEY);
+  const String val = Environment::get(TEST_KEY);
-    IAT_CHECK_EQ(val, String(TEST_VAL));
+  IAT_CHECK_EQ(val, String(TEST_VAL));
 
-    // Cleanup
+  // Cleanup
-    Environment::Unset(TEST_KEY);
+  (void)Environment::unset(TEST_KEY);
-    return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // 2. Overwriting Values
 // -------------------------------------------------------------------------
-bool TestOverwrite()
+auto test_overwrite() -> bool {
-{
+  (void)Environment::set(TEST_KEY, "ValueA");
-    Environment::Set(TEST_KEY, "ValueA");
+  IAT_CHECK_EQ(Environment::get(TEST_KEY), String("ValueA"));
-    IAT_CHECK_EQ(Environment::Get(TEST_KEY), String("ValueA"));
 
-    // Overwrite
+  // Overwrite
-    Environment::Set(TEST_KEY, "ValueB");
+  (void)Environment::set(TEST_KEY, "ValueB");
-    IAT_CHECK_EQ(Environment::Get(TEST_KEY), String("ValueB"));
+  IAT_CHECK_EQ(Environment::get(TEST_KEY), String("ValueB"));
 
-    Environment::Unset(TEST_KEY);
+  (void)Environment::unset(TEST_KEY);
-    return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // 3. Unset Logic
 // -------------------------------------------------------------------------
-bool TestUnset()
+auto test_unset() -> bool {
-{
+  (void)Environment::set(TEST_KEY, "To Be Deleted");
-    Environment::Set(TEST_KEY, "To Be Deleted");
+  IAT_CHECK(Environment::exists(TEST_KEY));
-    IAT_CHECK(Environment::Exists(TEST_KEY));
 
-    bool unsetRes = Environment::Unset(TEST_KEY);
+  const auto unset_res = Environment::unset(TEST_KEY);
-    IAT_CHECK(unsetRes);
+  IAT_CHECK(unset_res.has_value());
 
-    // Verify it is actually gone
+  // Verify it is actually gone
-    IAT_CHECK_NOT(Environment::Exists(TEST_KEY));
+  IAT_CHECK_NOT(Environment::exists(TEST_KEY));
 
-    // Find should return nullopt
+  // Find should return nullopt
-    auto opt = Environment::Find(TEST_KEY);
+  const auto opt = Environment::find(TEST_KEY);
-    IAT_CHECK_NOT(opt.has_value());
+  IAT_CHECK_NOT(opt.has_value());
 
-    return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // 4. Default Value Fallbacks
 // -------------------------------------------------------------------------
-bool TestDefaults()
+auto test_defaults() -> bool {
-{
+  const char *ghost_key = "IA_THIS_KEY_DOES_NOT_EXIST";
-    const char *ghostKey = "IA_THIS_KEY_DOES_NOT_EXIST";
 
-    // Ensure it really doesn't exist
+  // Ensure it really doesn't exist
-    Environment::Unset(ghostKey);
+  (void)Environment::unset(ghost_key);
 
-    // Test Get with implicit default ("")
+  // Test Get with implicit default ("")
-    String empty = Environment::Get(ghostKey);
+  const String empty = Environment::get(ghost_key);
-    IAT_CHECK(empty.empty());
+  IAT_CHECK(empty.empty());
 
-    // Test Get with explicit default
+  // Test Get with explicit default
-    String fallback = Environment::Get(ghostKey, "MyDefault");
+  const String fallback = Environment::get(ghost_key, "MyDefault");
-    IAT_CHECK_EQ(fallback, String("MyDefault"));
+  IAT_CHECK_EQ(fallback, String("MyDefault"));
 
-    return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
@@ -122,56 +117,54 @@ bool TestDefaults()
 // -------------------------------------------------------------------------
 // Does Set(Key, "") create an existing empty variable, or unset it?
 // Standard POSIX/Windows API behavior is that it EXISTS, but is empty.
-bool TestEmptyValue()
+auto test_empty_value() -> bool {
-{
+  (void)Environment::set(TEST_KEY, "");
-    Environment::Set(TEST_KEY, "");
 
 #if IA_PLATFORM_WINDOWS
-    // Windows behavior: Setting to empty string removes the variable
+  // Windows behavior: Setting to empty string removes the variable
-    // IAT_CHECK_NOT(Environment::Exists(TEST_KEY));
+  // IAT_CHECK_NOT(Environment::exists(TEST_KEY));
-    // auto opt = Environment::Find(TEST_KEY);
+  // auto opt = Environment::find(TEST_KEY);
-    // IAT_CHECK_NOT(opt.has_value());
+  // IAT_CHECK_NOT(opt.has_value());
 #else
-    // POSIX behavior: Variable exists but is empty
+  // POSIX behavior: Variable exists but is empty
-    IAT_CHECK(Environment::Exists(TEST_KEY));
+  IAT_CHECK(Environment::exists(TEST_KEY));
-    auto opt = Environment::Find(TEST_KEY);
+  const auto opt = Environment::find(TEST_KEY);
-    IAT_CHECK(opt.has_value());
+  IAT_CHECK(opt.has_value());
-    IAT_CHECK(opt->empty());
+  IAT_CHECK(opt->empty());
 #endif
 
-    // Cleanup
+  // Cleanup
-    Environment::Unset(TEST_KEY);
+  (void)Environment::unset(TEST_KEY);
-    IAT_CHECK_NOT(Environment::Exists(TEST_KEY));
+  IAT_CHECK_NOT(Environment::exists(TEST_KEY));
 
-    return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // 6. Validation / Bad Input
 // -------------------------------------------------------------------------
-bool TestBadInput()
+auto test_bad_input() -> bool {
-{
+  // Setting an empty key should fail gracefully
-    // Setting an empty key should fail gracefully
+  const auto res = Environment::set("", "Value");
-    bool res = Environment::Set("", "Value");
+  IAT_CHECK_NOT(res.has_value());
-    IAT_CHECK_NOT(res);
 
-    // Unsetting an empty key should fail
+  // Unsetting an empty key should fail
-    bool resUnset = Environment::Unset("");
+  const auto res_unset = Environment::unset("");
-    IAT_CHECK_NOT(resUnset);
+  IAT_CHECK_NOT(res_unset.has_value());
 
-    return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // Registration
 // -------------------------------------------------------------------------
 IAT_BEGIN_TEST_LIST()
-IAT_ADD_TEST(TestBasicCycle);
+IAT_ADD_TEST(test_basic_cycle);
-IAT_ADD_TEST(TestOverwrite);
+IAT_ADD_TEST(test_overwrite);
-IAT_ADD_TEST(TestUnset);
+IAT_ADD_TEST(test_unset);
-IAT_ADD_TEST(TestDefaults);
+IAT_ADD_TEST(test_defaults);
-IAT_ADD_TEST(TestEmptyValue);
+IAT_ADD_TEST(test_empty_value);
-IAT_ADD_TEST(TestBadInput);
+IAT_ADD_TEST(test_bad_input);
 IAT_END_TEST_LIST()
 
 IAT_END_BLOCK()

Tests/Unit/FileOps.cpp

@@ -0,0 +1,194 @@
+// IACore-OSS; The Core Library for All IA Open Source Projects
+// Copyright (C) 2026 IAS (ias@iasoft.dev)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <IACore/FileOps.hpp>
+#include <IACore/IATest.hpp>
+
+using namespace IACore;
+
+IAT_BEGIN_BLOCK(Core, FileOps)
+
+// -------------------------------------------------------------------------
+// Helpers
+// -------------------------------------------------------------------------
+void cleanup_file(const Path &path) {
+  std::error_code ec;
+  if (std::filesystem::exists(path, ec)) {
+    std::filesystem::remove(path, ec);
+  }
+}
+
+// -------------------------------------------------------------------------
+// 1. Text File I/O
+// -------------------------------------------------------------------------
+auto test_text_io() -> bool {
+  const Path path = "iatest_fileops_text.txt";
+  const String content = "Hello IACore FileOps!\nLine 2";
+
+  // 1. Write
+  const auto write_res = FileOps::write_text_file(path, content, true);
+  IAT_CHECK(write_res.has_value());
+  IAT_CHECK_EQ(*write_res, content.size());
+
+  // 2. Read
+  const auto read_res = FileOps::read_text_file(path);
+  IAT_CHECK(read_res.has_value());
+  IAT_CHECK_EQ(*read_res, content);
+
+  // Cleanup
+  cleanup_file(path);
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 2. Binary File I/O
+// -------------------------------------------------------------------------
+auto test_binary_io() -> bool {
+  const Path path = "iatest_fileops_bin.bin";
+  const Vec<u8> content = {0xDE, 0xAD, 0xBE, 0xEF, 0x00, 0xFF};
+
+  // 1. Write
+  const auto write_res = FileOps::write_binary_file(path, content, true);
+  IAT_CHECK(write_res.has_value());
+  IAT_CHECK_EQ(*write_res, content.size());
+
+  // 2. Read
+  const auto read_res = FileOps::read_binary_file(path);
+  IAT_CHECK(read_res.has_value());
+  IAT_CHECK_EQ(read_res->size(), content.size());
+
+  for (usize i = 0; i < content.size(); ++i) {
+    IAT_CHECK_EQ((*read_res)[i], content[i]);
+  }
+
+  // Cleanup
+  cleanup_file(path);
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 3. Memory Mapping (File)
+// -------------------------------------------------------------------------
+auto test_file_mapping() -> bool {
+  const Path path = "iatest_fileops_map.txt";
+  const String content = "MappedContent";
+
+  // Setup file
+  (void)FileOps::write_text_file(path, content, true);
+
+  // Map
+  usize size = 0;
+  const auto map_res = FileOps::map_file(path, size);
+  IAT_CHECK(map_res.has_value());
+  IAT_CHECK_EQ(size, content.size());
+
+  const u8 *ptr = *map_res;
+  IAT_CHECK(ptr != nullptr);
+
+  // Verify content via pointer
+  String read_back(reinterpret_cast<const char *>(ptr), size);
+  IAT_CHECK_EQ(read_back, content);
+
+  // Unmap
+  FileOps::unmap_file(ptr);
+
+  cleanup_file(path);
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 4. Shared Memory
+// -------------------------------------------------------------------------
+auto test_shared_memory() -> bool {
+  const String shm_name = "iatest_shm_block";
+  const usize shm_size = 4096;
+
+  // 1. Create as Owner
+  auto owner_res = FileOps::map_shared_memory(shm_name, shm_size, true);
+  IAT_CHECK(owner_res.has_value());
+  u8 *owner_ptr = *owner_res;
+
+  // Write data
+  std::memset(owner_ptr, 0, shm_size);
+  const String msg = "Shared Memory Message";
+  std::memcpy(owner_ptr, msg.data(), msg.size());
+
+  // 2. Open as Client
+  auto client_res = FileOps::map_shared_memory(shm_name, shm_size, false);
+  IAT_CHECK(client_res.has_value());
+  u8 *client_ptr = *client_res;
+
+  // Verify data
+  String read_msg(reinterpret_cast<const char *>(client_ptr), msg.size());
+  IAT_CHECK_EQ(read_msg, msg);
+
+  // 3. Cleanup
+  FileOps::unmap_file(owner_ptr);
+  FileOps::unmap_file(client_ptr);
+  FileOps::unlink_shared_memory(shm_name);
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 5. Stream Integration
+// -------------------------------------------------------------------------
+auto test_stream_integration() -> bool {
+  const Path path = "iatest_fileops_stream.bin";
+  cleanup_file(path);
+
+  // Write via StreamWriter
+  {
+    auto writer_res = FileOps::stream_to_file(path, true);
+    IAT_CHECK(writer_res.has_value());
+    auto &writer = *writer_res;
+
+    (void)writer.write<u32>(0x12345678);
+    (void)writer.write<u8>(0xFF);
+  } // Destructor should flush/close
+
+  // Read via StreamReader
+  {
+    auto reader_res = FileOps::stream_from_file(path);
+    IAT_CHECK(reader_res.has_value());
+    auto &reader = *reader_res;
+
+    auto val_u32 = reader.read<u32>();
+    IAT_CHECK(val_u32.has_value());
+    IAT_CHECK_EQ(*val_u32, 0x12345678);
+
+    auto val_u8 = reader.read<u8>();
+    IAT_CHECK(val_u8.has_value());
+    IAT_CHECK_EQ(*val_u8, 0xFF);
+  }
+
+  cleanup_file(path);
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// Registration
+// -------------------------------------------------------------------------
+IAT_BEGIN_TEST_LIST()
+IAT_ADD_TEST(test_text_io);
+IAT_ADD_TEST(test_binary_io);
+IAT_ADD_TEST(test_file_mapping);
+IAT_ADD_TEST(test_shared_memory);
+IAT_ADD_TEST(test_stream_integration);
+IAT_END_TEST_LIST()
+
+IAT_END_BLOCK()
+
+IAT_REGISTER_ENTRY(Core, FileOps)

Tests/Unit/IPC.cpp

@@ -0,0 +1,163 @@
+// IACore-OSS; The Core Library for All IA Open Source Projects
+// Copyright (C) 2026 IAS (ias@iasoft.dev)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <IACore/FileOps.hpp>
+#include <IACore/IATest.hpp>
+#include <IACore/IPC.hpp>
+
+using namespace IACore;
+
+IAT_BEGIN_BLOCK(Core, IPC)
+
+// -------------------------------------------------------------------------
+// 1. Layout Constraints
+// -------------------------------------------------------------------------
+auto test_layout_constraints() -> bool {
+  // Verify alignment
+  IAT_CHECK_EQ(alignof(IpcSharedMemoryLayout), static_cast<usize>(64));
+
+  // Verify offsets to ensure cache-line isolation
+  // Header is at 0
+  IAT_CHECK_EQ(offsetof(IpcSharedMemoryLayout, meta), static_cast<usize>(0));
+
+  // moni_control should be at 64 (cache line 1)
+  IAT_CHECK_EQ(offsetof(IpcSharedMemoryLayout, moni_control),
+               static_cast<usize>(64));
+
+  // ControlBlock is 128 bytes (64 for producer, 64 for consumer)
+  // So mino_control should be at 64 + 128 = 192
+  IAT_CHECK_EQ(offsetof(IpcSharedMemoryLayout, mino_control),
+               static_cast<usize>(192));
+
+  // Data offsets should follow mino_control (192 + 128 = 320)
+  IAT_CHECK_EQ(offsetof(IpcSharedMemoryLayout, moni_data_offset),
+               static_cast<usize>(320));
+
+  // Ensure the whole struct is a multiple of 64
+  IAT_CHECK_EQ(sizeof(IpcSharedMemoryLayout) % 64, static_cast<usize>(0));
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 2. Manual Shared Memory & RingBuffer Setup
+// -------------------------------------------------------------------------
+auto test_manual_shm_ringbuffer() -> bool {
+  const String shm_name = "IA_TEST_IPC_LAYOUT_CHECK";
+  const usize shm_size = 16 * 1024; // 16KB
+
+  // 1. Create Shared Memory
+  // Ensure it doesn't exist first
+  FileOps::unlink_shared_memory(shm_name);
+
+  auto map_res = FileOps::map_shared_memory(shm_name, shm_size, true);
+  IAT_CHECK(map_res.has_value());
+
+  u8 *base_ptr = *map_res;
+  auto *layout = reinterpret_cast<IpcSharedMemoryLayout *>(base_ptr);
+
+  // 2. Initialize Layout
+  // We simulate what IpcManager would do
+  layout->meta.magic = 0xDEADBEEF; // Dummy
+  layout->meta.version = 1;
+  layout->meta.total_size = shm_size;
+
+  // Define data regions
+  // Data starts after the layout struct
+  const usize header_size = IpcSharedMemoryLayout::get_header_size();
+  const usize data_available = shm_size - header_size;
+  const usize half_data = data_available / 2;
+
+  layout->moni_data_offset = header_size;
+  layout->moni_data_size = half_data;
+
+  layout->mino_data_offset = header_size + half_data;
+  layout->mino_data_size = half_data;
+
+  // 3. Initialize RingBuffers
+  // MONI (Manager Out, Node In)
+  // Manager is Owner of MONI
+  Span<u8> moni_data_span(base_ptr + layout->moni_data_offset,
+                          static_cast<usize>(layout->moni_data_size));
+  auto moni_res =
+      RingBufferView::create(&layout->moni_control, moni_data_span, true);
+  IAT_CHECK(moni_res.has_value());
+  auto moni = std::move(*moni_res);
+
+  // MINO (Manager In, Node Out)
+  // Manager is NOT Owner of MINO (Node writes to it)
+  // But for this test, let's pretend we are the Node for MINO to test writing
+  Span<u8> mino_data_span(base_ptr + layout->mino_data_offset,
+                          static_cast<usize>(layout->mino_data_size));
+  auto mino_res =
+      RingBufferView::create(&layout->mino_control, mino_data_span, true);
+  IAT_CHECK(mino_res.has_value());
+  auto _ = std::move(*mino_res);
+
+  // 4. Test Data Flow
+  // Write to MONI
+  String msg = "IPC_TEST_MESSAGE";
+  IAT_CHECK(
+      moni.push(100, Span<const u8>(reinterpret_cast<const u8 *>(msg.data()),
+                                    msg.size()))
+          .has_value());
+
+  // Read from MONI (Simulate Node reading)
+  // Create a reader view
+  auto moni_reader_res =
+      RingBufferView::create(&layout->moni_control, moni_data_span, false);
+  IAT_CHECK(moni_reader_res.has_value());
+  auto moni_reader = std::move(*moni_reader_res);
+
+  RingBufferView::PacketHeader header;
+  u8 buffer[128];
+  auto pop_res = moni_reader.pop(header, Span<u8>(buffer, 128));
+  IAT_CHECK(pop_res.has_value());
+  IAT_CHECK(pop_res->has_value()); // Should have data
+  IAT_CHECK_EQ(header.id, static_cast<u16>(100));
+
+  String received((char *)buffer, *pop_res.value());
+  IAT_CHECK_EQ(received, msg);
+
+  // Cleanup
+  FileOps::unmap_file(base_ptr);
+  FileOps::unlink_shared_memory(shm_name);
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 3. Manager Instantiation
+// -------------------------------------------------------------------------
+class TestManager : public IpcManager {
+public:
+  void on_signal(NativeProcessID, u8) override {}
+  void on_packet(NativeProcessID, u16, Span<const u8>) override {}
+};
+
+auto test_manager_instantiation() -> bool {
+  TestManager mgr;
+  return true;
+}
+
+IAT_BEGIN_TEST_LIST()
+IAT_ADD_TEST(test_layout_constraints);
+IAT_ADD_TEST(test_manual_shm_ringbuffer);
+IAT_ADD_TEST(test_manager_instantiation);
+IAT_END_TEST_LIST()
+
+IAT_END_BLOCK()
+
+IAT_REGISTER_ENTRY(Core, IPC)

Tests/Unit/JSON.cpp

@@ -0,0 +1,192 @@
+// IACore-OSS; The Core Library for All IA Open Source Projects
+// Copyright (C) 2026 IAS (ias@iasoft.dev)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <IACore/IATest.hpp>
+#include <IACore/JSON.hpp>
+
+using namespace IACore;
+
+// -----------------------------------------------------------------------------
+// Test Structures for Serialization
+// -----------------------------------------------------------------------------
+struct UserProfile {
+  String username;
+  u32 id;
+  bool is_active;
+  Vec<String> roles;
+
+  // Equality operator for verification
+  bool operator==(const UserProfile &other) const {
+    return username == other.username && id == other.id &&
+           is_active == other.is_active && roles == other.roles;
+  }
+};
+
+// -----------------------------------------------------------------------------
+// Test Block Definition
+// -----------------------------------------------------------------------------
+
+IAT_BEGIN_BLOCK(Core, JSON)
+
+// -------------------------------------------------------------------------
+// 1. Dynamic JSON (nlohmann::json)
+// -------------------------------------------------------------------------
+auto test_dynamic_parse() -> bool {
+  const String json_text = R"({
+        "string": "Hello World",
+        "int": 42,
+        "float": 3.14159,
+        "bool": true,
+        "array": [10, 20, 30],
+        "object": { "key": "value" }
+    })";
+
+  auto res = Json::parse(json_text);
+  IAT_CHECK(res.has_value());
+
+  const auto &j = *res;
+
+  // Type checks and value retrieval
+  IAT_CHECK(j["string"].is_string());
+  IAT_CHECK_EQ(j["string"].get<String>(), String("Hello World"));
+
+  IAT_CHECK(j["int"].is_number_integer());
+  IAT_CHECK_EQ(j["int"].get<i32>(), 42);
+
+  IAT_CHECK(j["float"].is_number_float());
+  IAT_CHECK_APPROX(j["float"].get<f32>(), 3.14159f);
+
+  IAT_CHECK(j["bool"].is_boolean());
+  IAT_CHECK_EQ(j["bool"].get<bool>(), true);
+
+  IAT_CHECK(j["array"].is_array());
+  IAT_CHECK_EQ(j["array"].size(), 3u);
+  IAT_CHECK_EQ(j["array"][0].get<i32>(), 10);
+
+  IAT_CHECK(j["object"].is_object());
+  IAT_CHECK_EQ(j["object"]["key"].get<String>(), String("value"));
+
+  return true;
+}
+
+auto test_dynamic_encode() -> bool {
+  nlohmann::json j;
+  j["name"] = "IACore";
+  j["version"] = 2;
+
+  const String encoded = Json::encode(j);
+
+  // Simple containment check as key order isn't guaranteed
+  IAT_CHECK(encoded.find("IACore") != String::npos);
+  IAT_CHECK(encoded.find("version") != String::npos);
+  IAT_CHECK(encoded.find("2") != String::npos);
+
+  return true;
+}
+
+auto test_parse_invalid() -> bool {
+  const String bad_json = "{ key: value }"; // Missing quotes
+  auto res = Json::parse(bad_json);
+  IAT_CHECK_NOT(res.has_value());
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 2. Struct Serialization (Glaze)
+// -------------------------------------------------------------------------
+auto test_struct_round_trip() -> bool {
+  UserProfile original{.username = "test_user",
+                       .id = 12345,
+                       .is_active = true,
+                       .roles = {"admin", "editor"}};
+
+  // Struct -> JSON
+  auto encode_res = Json::encode_struct(original);
+  IAT_CHECK(encode_res.has_value());
+  String json_str = *encode_res;
+
+  // Verify JSON structure roughly
+  IAT_CHECK(json_str.find("test_user") != String::npos);
+  IAT_CHECK(json_str.find("roles") != String::npos);
+
+  // JSON -> Struct
+  auto decode_res = Json::parse_to_struct<UserProfile>(json_str);
+  IAT_CHECK(decode_res.has_value());
+
+  UserProfile decoded = *decode_res;
+  IAT_CHECK(decoded == original);
+
+  return true;
+}
+
+auto test_struct_parse_error() -> bool {
+  const String malformed = "{ broken_json: ";
+  auto res = Json::parse_to_struct<UserProfile>(malformed);
+  IAT_CHECK_NOT(res.has_value());
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 3. Read-Only Parsing (simdjson)
+// -------------------------------------------------------------------------
+auto test_read_only() -> bool {
+  const String json_text = R"({
+        "id": 999,
+        "name": "Simd",
+        "scores": [1.1, 2.2]
+    })";
+
+  auto res = Json::parse_read_only(json_text);
+  IAT_CHECK(res.has_value());
+
+  auto &doc = *res;
+  simdjson::dom::element root = doc.root();
+
+  // Check ID
+  u64 id = 0;
+  auto err_id = root["id"].get(id);
+  IAT_CHECK(!err_id);
+  IAT_CHECK_EQ(id, 999ULL);
+
+  // Check Name
+  std::string_view name;
+  auto err_name = root["name"].get(name);
+  IAT_CHECK(!err_name);
+  IAT_CHECK_EQ(String(name), String("Simd"));
+
+  // Check Array
+  simdjson::dom::array scores;
+  auto err_arr = root["scores"].get(scores);
+  IAT_CHECK(!err_arr);
+  IAT_CHECK_EQ(scores.size(), 2u);
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// Registration
+// -------------------------------------------------------------------------
+IAT_BEGIN_TEST_LIST()
+IAT_ADD_TEST(test_dynamic_parse);
+IAT_ADD_TEST(test_dynamic_encode);
+IAT_ADD_TEST(test_parse_invalid);
+IAT_ADD_TEST(test_struct_round_trip);
+IAT_ADD_TEST(test_struct_parse_error);
+IAT_ADD_TEST(test_read_only);
+IAT_END_TEST_LIST()
+
+IAT_END_BLOCK()
+
+IAT_REGISTER_ENTRY(Core, JSON)

Tests/Unit/Logger.cpp

@@ -0,0 +1,124 @@
+// IACore-OSS; The Core Library for All IA Open Source Projects
+// Copyright (C) 2026 IAS (ias@iasoft.dev)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <IACore/FileOps.hpp>
+#include <IACore/IATest.hpp>
+#include <IACore/Logger.hpp>
+
+using namespace IACore;
+
+IAT_BEGIN_BLOCK(Core, Logger)
+
+static constexpr const char *LOG_FILE = "iacore_test_log.txt";
+
+auto test_file_logging() -> bool {
+  // 1. Enable logging to disk
+  const auto res = Logger::enable_logging_to_disk(LOG_FILE);
+  IAT_CHECK(res.has_value());
+
+  // 2. Set level to Trace to ensure we capture everything
+  Logger::set_log_level(Logger::LogLevel::Trace);
+
+  // 3. Log unique messages
+  const String msg_info = "Test_Info_Msg_123";
+  const String msg_err = "Test_Error_Msg_456";
+  const String msg_warn = "Test_Warn_Msg_789";
+
+  Logger::info("{}", msg_info);
+  Logger::error("{}", msg_err);
+  Logger::warn("{}", msg_warn);
+
+  // 4. Flush
+  Logger::flush_logs();
+
+  // 5. Read back
+  auto read_res = FileOps::read_text_file(LOG_FILE);
+  if (!read_res) {
+    std::cout << console::YELLOW << "    Warning: Could not read log file ("
+              << read_res.error() << "). Skipping verification.\n"
+              << console::RESET;
+    return true;
+  }
+
+  const String content = *read_res;
+
+  IAT_CHECK(content.find(msg_info) != String::npos);
+  IAT_CHECK(content.find(msg_err) != String::npos);
+  IAT_CHECK(content.find(msg_warn) != String::npos);
+
+  // Check for log tags
+  IAT_CHECK(content.find("INFO") != String::npos);
+  IAT_CHECK(content.find("ERROR") != String::npos);
+  IAT_CHECK(content.find("WARN") != String::npos);
+
+  return true;
+}
+
+auto test_log_levels() -> bool {
+  // 1. Set level to Warn (Trace < Debug < Info < Warn < Error)
+  Logger::set_log_level(Logger::LogLevel::Warn);
+
+  const String unique_info = "Hidden_Info_Msg";
+  const String unique_warn = "Visible_Warn_Msg";
+
+  Logger::info("{}", unique_info);
+  Logger::warn("{}", unique_warn);
+
+  Logger::flush_logs();
+
+  auto read_res = FileOps::read_text_file(LOG_FILE);
+  if (!read_res) {
+    return true;
+  }
+
+  const String content = *read_res;
+
+  // Info should NOT be present
+  IAT_CHECK(content.find(unique_info) == String::npos);
+  // Warn SHOULD be present
+  IAT_CHECK(content.find(unique_warn) != String::npos);
+
+  return true;
+}
+
+auto test_formatting() -> bool {
+  Logger::set_log_level(Logger::LogLevel::Info);
+
+  const String name = "IACore";
+  const i32 version = 99;
+
+  Logger::info("System {} online v{}", name, version);
+  Logger::flush_logs();
+
+  auto read_res = FileOps::read_text_file(LOG_FILE);
+  if (!read_res) {
+    return true;
+  }
+
+  const String content = *read_res;
+  IAT_CHECK(content.find("System IACore online v99") != String::npos);
+
+  return true;
+}
+
+IAT_BEGIN_TEST_LIST()
+IAT_ADD_TEST(test_file_logging);
+IAT_ADD_TEST(test_log_levels);
+IAT_ADD_TEST(test_formatting);
+IAT_END_TEST_LIST()
+
+IAT_END_BLOCK()
+
+IAT_REGISTER_ENTRY(Core, Logger)

Tests/Unit/Main.cpp

@@ -16,20 +16,26 @@
 #include <IACore/IACore.hpp>
 #include <IACore/IATest.hpp>
 
-int main(int argc, char *argv[])
+#include <IACore/SocketOps.hpp>
-{
-    UNUSED(argc);
-    UNUSED(argv);
 
-    printf(__CC_GREEN "\n===============================================================\n");
+using namespace IACore;
-    printf("   IACore (Independent Architecture Core) - Unit Test Suite\n");
-    printf("===============================================================\n" __CC_DEFAULT "\n");
 
-    IACore::Initialize();
+IACORE_MAIN() {
+  (void)args;
 
-    int result = ia::iatest::TestRegistry::RunAll();
+  IA_TRY_PURE(SocketOps::initialize());
 
-    IACore::Terminate();
+  std::cout
+      << console::GREEN
+      << "\n===============================================================\n";
+  std::cout << "   IACore (Independent Architecture Core) - Unit Test Suite\n";
+  std::cout
+      << "===============================================================\n"
+      << console::RESET << "\n";
 
-    return result;
+  const i32 result = Test::TestRegistry::run_all();
+
+  SocketOps::terminate();
+
+  return result;
 }

Tests/Unit/Platform.cpp

@@ -0,0 +1,143 @@
+// IACore-OSS; The Core Library for All IA Open Source Projects
+// Copyright (C) 2026 IAS (ias@iasoft.dev)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <IACore/IATest.hpp>
+#include <IACore/Platform.hpp>
+#include <cstring>
+
+using namespace IACore;
+
+IAT_BEGIN_BLOCK(Core, Platform)
+
+// -------------------------------------------------------------------------
+// 1. OS Name Detection
+// -------------------------------------------------------------------------
+auto test_os_name() -> bool {
+  const char *os_name = Platform::get_operating_system_name();
+  IAT_CHECK(os_name != nullptr);
+
+  const String os(os_name);
+  IAT_CHECK(!os.empty());
+
+#if IA_PLATFORM_WINDOWS
+  IAT_CHECK_EQ(os, String("Windows"));
+#elif IA_PLATFORM_LINUX
+  IAT_CHECK_EQ(os, String("Linux"));
+#elif IA_PLATFORM_APPLE
+  IAT_CHECK_EQ(os, String("MacOS"));
+#elif IA_PLATFORM_WASM
+  IAT_CHECK_EQ(os, String("WebAssembly"));
+#endif
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 2. Architecture Name Detection
+// -------------------------------------------------------------------------
+auto test_arch_name() -> bool {
+  const char *arch_name = Platform::get_architecture_name();
+  IAT_CHECK(arch_name != nullptr);
+
+  const String arch(arch_name);
+  IAT_CHECK(!arch.empty());
+
+#if IA_ARCH_X64
+  IAT_CHECK_EQ(arch, String("x86_64"));
+#elif IA_ARCH_ARM64
+  IAT_CHECK_EQ(arch, String("ARM64"));
+#elif IA_ARCH_WASM
+  IAT_CHECK_EQ(arch, String("WASM"));
+#endif
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 3. CPU Capabilities
+// -------------------------------------------------------------------------
+auto test_capabilities() -> bool {
+  // Initialize detection
+  const bool check_result = Platform::check_cpu();
+  IAT_CHECK(check_result);
+
+  const auto &caps = Platform::get_capabilities();
+
+  // We verify that we can access the capabilities struct.
+  // The actual value of hardware_crc32 depends on the host machine,
+  // so we cannot assert true or false, but we ensure no crash occurs.
+  volatile bool has_crc = caps.hardware_crc32;
+  (void)has_crc;
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 4. CPUID (x64 Only)
+// -------------------------------------------------------------------------
+#if IA_ARCH_X64
+auto test_cpuid() -> bool {
+  i32 regs[4] = {0};
+
+  // Call CPUID with Function 0 (Vendor ID)
+  Platform::cpuid(0, 0, regs);
+
+  // EAX (regs[0]) holds max supported function. Should be > 0 on any modern
+  // CPU.
+  IAT_CHECK(regs[0] >= 0);
+
+  // EBX, EDX, ECX hold the vendor string.
+  // The order for the string is EBX, EDX, ECX.
+  char vendor[13];
+  std::memset(vendor, 0, 13);
+
+  std::memcpy(vendor, &regs[1], 4);     // EBX
+  std::memcpy(vendor + 4, &regs[3], 4); // EDX
+  std::memcpy(vendor + 8, &regs[2], 4); // ECX
+  vendor[12] = '\0';
+
+  const String vendor_str(vendor);
+  IAT_CHECK(!vendor_str.empty());
+
+  // Check against common vendors to ensure registers contained valid ASCII
+  bool is_known =
+      (vendor_str == "GenuineIntel" || vendor_str == "AuthenticAMD" ||
+       vendor_str == "KVMKVMKVM" || vendor_str == "Microsoft Hv" ||
+       vendor_str == "VBoxVBoxVBox");
+
+  if (!is_known) {
+    // Not a failure, just an unknown CPU vendor (or virtualization)
+    std::cout << "      [Info] Unknown CPU Vendor: " << vendor_str << "\n";
+  }
+
+  return true;
+}
+#endif
+
+// -------------------------------------------------------------------------
+// Registration
+// -------------------------------------------------------------------------
+IAT_BEGIN_TEST_LIST()
+IAT_ADD_TEST(test_os_name);
+IAT_ADD_TEST(test_arch_name);
+IAT_ADD_TEST(test_capabilities);
+#if IA_ARCH_X64
+IAT_ADD_TEST(test_cpuid);
+#endif
+IAT_END_TEST_LIST()
+
+IAT_END_BLOCK()
+
+IAT_REGISTER_ENTRY(Core, Platform)

Tests/Unit/ProcessOps.cpp

@@ -13,9 +13,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include <IACore/ProcessOps.hpp>
-
 #include <IACore/IATest.hpp>
+#include <IACore/ProcessOps.hpp>
 
 using namespace IACore;
 
@@ -23,13 +22,13 @@ using namespace IACore;
 // Platform Abstraction for Test Commands
 // -----------------------------------------------------------------------------
 #if IA_PLATFORM_WINDOWS
-#    define CMD_ECHO_EXE "cmd.exe"
+#define CMD_ECHO_EXE "cmd.exe"
-#    define CMD_ARG_PREFIX "/c echo"
+#define CMD_ARG_PREFIX "/c echo"
-#    define NULL_DEVICE "NUL"
+#define NULL_DEVICE "NUL"
 #else
-#    define CMD_ECHO_EXE "/bin/echo"
+#define CMD_ECHO_EXE "/bin/echo"
-#    define CMD_ARG_PREFIX ""
+#define CMD_ARG_PREFIX ""
-#    define NULL_DEVICE "/dev/null"
+#define NULL_DEVICE "/dev/null"
 #endif
 
 IAT_BEGIN_BLOCK(Core, ProcessOps)
@@ -37,215 +36,226 @@ IAT_BEGIN_BLOCK(Core, ProcessOps)
 // -------------------------------------------------------------------------
 // 1. Basic Execution (Exit Code 0)
 // -------------------------------------------------------------------------
-bool TestBasicRun()
+auto test_basic_run() -> bool {
-{
+  // Simple "echo hello"
-    // Simple "echo hello"
+  String captured;
-    String captured;
 
-    auto result = ProcessOps::SpawnProcessSync(CMD_ECHO_EXE, CMD_ARG_PREFIX " HelloIA",
+  const auto result =
-                                               [&](StringView line) { captured = line; });
+      ProcessOps::spawn_process_sync(CMD_ECHO_EXE, CMD_ARG_PREFIX " HelloIA",
+                                     [&](StringView line) { captured = line; });
 
-    IAT_CHECK(result.has_value());
+  IAT_CHECK(result.has_value());
-    IAT_CHECK_EQ(*result, 0); // Exit code 0
+  IAT_CHECK_EQ(*result, 0); // Exit code 0
 
-    // We check if "HelloIA" is contained or equal.
+  // We check if "HelloIA" is contained or equal.
-    IAT_CHECK(captured.find("HelloIA") != String::npos);
+  IAT_CHECK(captured.find("HelloIA") != String::npos);
 
-    return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // 2. Argument Parsing
 // -------------------------------------------------------------------------
-bool TestArguments()
+auto test_arguments() -> bool {
-{
+  Vec<String> lines;
-    Vec<String> lines;
 
-    // Echo two distinct words.
+  // Echo two distinct words.
-    // Windows: cmd.exe /c echo one two
+  // Windows: cmd.exe /c echo one two
-    // Linux: /bin/echo one two
+  // Linux: /bin/echo one two
-    String args = String(CMD_ARG_PREFIX) + " one two";
+  String args = String(CMD_ARG_PREFIX) + " one two";
-    if (args[0] == ' ')
+  if (!args.empty() && args[0] == ' ') {
-        args.erase(0, 1); // cleanup space if prefix empty
+    args.erase(0, 1); // cleanup space if prefix empty
+  }
 
-    auto result =
+  const auto result =
-        ProcessOps::SpawnProcessSync(CMD_ECHO_EXE, args, [&](StringView line) { lines.push_back(String(line)); });
+      ProcessOps::spawn_process_sync(CMD_ECHO_EXE, args, [&](StringView line) {
+        lines.push_back(String(line));
+      });
 
-    IAT_CHECK_EQ(*result, 0);
+  IAT_CHECK_EQ(*result, 0);
-    IAT_CHECK(lines.size() > 0);
+  IAT_CHECK(lines.size() > 0);
 
-    // Output should contain "one two"
+  // Output should contain "one two"
-    IAT_CHECK(lines[0].find("one two") != String::npos);
+  IAT_CHECK(lines[0].find("one two") != String::npos);
 
-    return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // 3. Error / Non-Zero Exit Codes
 // -------------------------------------------------------------------------
-bool TestExitCodes()
+auto test_exit_codes() -> bool {
-{
+  // We need a command that returns non-zero.
-    // We need a command that returns non-zero.
+  // Windows: cmd /c exit 1
-    // Windows: cmd /c exit 1
+  // Linux: /bin/sh -c "exit 1"
-    // Linux: /bin/sh -c "exit 1"
 
-    String cmd, arg;
+  String cmd;
+  String arg;
 
 #if IA_PLATFORM_WINDOWS
-    cmd = "cmd.exe";
+  cmd = "cmd.exe";
-    arg = "/c exit 42";
+  arg = "/c exit 42";
 #else
-    cmd = "/bin/sh";
+  cmd = "/bin/sh";
-    arg = "-c \"exit 42\""; // quotes needed for sh -c
+  arg = "-c \"exit 42\""; // quotes needed for sh -c
 #endif
 
-    auto result = ProcessOps::SpawnProcessSync(cmd, arg, [](StringView) {});
+  const auto result =
+      ProcessOps::spawn_process_sync(cmd, arg, [](StringView) {});
 
-    IAT_CHECK(result.has_value());
+  IAT_CHECK(result.has_value());
-    IAT_CHECK_EQ(*result, 42);
+  IAT_CHECK_EQ(*result, 42);
 
-    return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // 4. Missing Executable Handling
 // -------------------------------------------------------------------------
-bool TestMissingExe()
+auto test_missing_exe() -> bool {
-{
+  // Try to run a random string
-    // Try to run a random string
+  const auto result =
-    auto result = ProcessOps::SpawnProcessSync("sdflkjghsdflkjg", "", [](StringView) {});
+      ProcessOps::spawn_process_sync("sdflkjghsdflkjg", "", [](StringView) {});
 
-    // Windows: CreateProcess usually fails -> returns unexpected
+  // Windows: CreateProcess usually fails -> returns unexpected
-    // Linux: execvp fails inside child, returns 127 via waitpid
+  // Linux: execvp fails inside child, returns 127 via waitpid
 
 #if IA_PLATFORM_WINDOWS
-    IAT_CHECK_NOT(result.has_value()); // Should be an error string
+  IAT_CHECK_NOT(result.has_value()); // Should be an error string
 #else
-    // Linux fork succeeds, but execvp fails, returning 127
+  // Linux fork succeeds, but execvp fails, returning 127
-    IAT_CHECK(result.has_value());
+  IAT_CHECK(result.has_value());
-    IAT_CHECK_EQ(*result, 127);
+  IAT_CHECK_EQ(*result, 127);
 #endif
 
-    return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // 5. Line Buffer Logic (The 4096 split test)
 // -------------------------------------------------------------------------
-bool TestLargeOutput()
+auto test_large_output() -> bool {
-{
+  // Need to generate output larger than the internal 4096 buffer
-    // Need to generate output larger than the internal 4096 buffer
+  // to ensure the "partial line" logic works when a line crosses a buffer
-    // to ensure the "partial line" logic works when a line crosses a buffer boundary.
+  // boundary.
 
-    String massiveString;
+  String massive_string;
-    massiveString.reserve(5000);
+  massive_string.reserve(5000);
-    for (int i = 0; i < 500; ++i)
+  for (i32 i = 0; i < 500; ++i) {
-        massiveString += "1234567890"; // 5000 chars
+    massive_string += "1234567890"; // 5000 chars
+  }
 
-    String cmd, arg;
+  String cmd;
+  String arg;
 
 #if IA_PLATFORM_WINDOWS
-    cmd = "cmd.exe";
+  cmd = "cmd.exe";
-    // Windows has command line length limits (~8k), 5k is safe.
+  // Windows has command line length limits (~8k), 5k is safe.
-    arg = "/c echo " + massiveString;
+  arg = "/c echo " + massive_string;
 #else
-    cmd = "/bin/echo";
+  cmd = "/bin/echo";
-    arg = massiveString;
+  arg = massive_string;
 #endif
 
-    String captured;
+  String captured;
-    auto result = ProcessOps::SpawnProcessSync(cmd, arg, [&](StringView line) { captured += line; });
+  const auto result = ProcessOps::spawn_process_sync(
+      cmd, arg, [&](StringView line) { captured += line; });
 
-    IAT_CHECK(result.has_value());
+  IAT_CHECK(result.has_value());
-    IAT_CHECK_EQ(*result, 0);
+  IAT_CHECK_EQ(*result, 0);
 
-    // If the LineBuffer failed to stitch chunks, the length wouldn't match
+  // If the LineBuffer failed to stitch chunks, the length wouldn't match
-    // or we would get multiple callbacks if we expected 1 line.
+  // or we would get multiple callbacks if we expected 1 line.
-    IAT_CHECK_EQ(captured.length(), massiveString.length());
+  IAT_CHECK_EQ(captured.length(), massive_string.length());
 
-    return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // 6. Multi-Line Handling
 // -------------------------------------------------------------------------
-bool TestMultiLine()
+auto test_multi_line() -> bool {
-{
+  // Windows: cmd /c "echo A && echo B"
-    // Windows: cmd /c "echo A && echo B"
+  // Linux: /bin/sh -c "echo A; echo B"
-    // Linux: /bin/sh -c "echo A; echo B"
 
-    String cmd, arg;
+  String cmd;
+  String arg;
 #if IA_PLATFORM_WINDOWS
-    cmd = "cmd.exe";
+  cmd = "cmd.exe";
-    arg = "/c \"echo LineA && echo LineB\"";
+  arg = "/c \"echo LineA && echo LineB\"";
 #else
-    cmd = "/bin/sh";
+  cmd = "/bin/sh";
-    arg = "-c \"echo LineA; echo LineB\"";
+  arg = "-c \"echo LineA; echo LineB\"";
 #endif
 
-    int lineCount = 0;
+  i32 line_count = 0;
-    bool foundA = false;
+  bool found_a = false;
-    bool foundB = false;
+  bool found_b = false;
 
-    UNUSED(ProcessOps::SpawnProcessSync(cmd, arg, [&](StringView line) {
+  IA_UNUSED const auto res =
-        lineCount++;
+      ProcessOps::spawn_process_sync(cmd, arg, [&](StringView line) {
-        if (line.find("LineA") != String::npos)
+        line_count++;
-            foundA = true;
+        if (line.find("LineA") != String::npos) {
-        if (line.find("LineB") != String::npos)
+          found_a = true;
-            foundB = true;
+        }
-    }));
+        if (line.find("LineB") != String::npos) {
+          found_b = true;
+        }
+      });
 
-    IAT_CHECK(foundA);
+  IAT_CHECK(found_a);
-    IAT_CHECK(foundB);
+  IAT_CHECK(found_b);
-    // We expect at least 2 lines.
+  // We expect at least 2 lines.
-    // (Windows sometimes echoes the command itself depending on echo settings, but we check contents)
+  // (Windows sometimes echoes the command itself depending on echo settings,
-    IAT_CHECK(lineCount >= 2);
+  // but we check contents)
+  IAT_CHECK(line_count >= 2);
 
-    return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // 6. Complex Command Line Arguments Handling
 // -------------------------------------------------------------------------
-bool TestComplexArguments()
+auto test_complex_arguments() -> bool {
-{
+  // Should parse as 3 arguments:
-    // Should parse as 3 arguments:
+  // 1. -DDEFINED_MSG="Hello World"
-    // 1. -DDEFINED_MSG="Hello World"
+  // 2. -v
-    // 2. -v
+  // 3. path/to/file
-    // 3. path/to/file
+  const String complex_args =
-    String complexArgs = "-DDEFINED_MSG=\\\"Hello World\\\" -v path/to/file";
+      "-DDEFINED_MSG=\\\"Hello World\\\" -v path/to/file";
 
-    String cmd = CMD_ECHO_EXE;
+  const String cmd = CMD_ECHO_EXE;
 
-    String finalArgs;
+  String final_args;
 #if IA_PLATFORM_WINDOWS
-    finalArgs = "/c echo " + complexArgs;
+  final_args = "/c echo " + complex_args;
 #else
-    finalArgs = complexArgs;
+  final_args = complex_args;
 #endif
 
-    String captured;
+  String captured;
-    auto result = ProcessOps::SpawnProcessSync(cmd, finalArgs, [&](StringView line) { captured += line; });
+  const auto result = ProcessOps::spawn_process_sync(
+      cmd, final_args, [&](StringView line) { captured += line; });
 
-    IAT_CHECK(result.has_value());
+  IAT_CHECK(result.has_value());
-    IAT_CHECK_EQ(*result, 0);
+  IAT_CHECK_EQ(*result, 0);
 
-    // Verify the quotes were preserved in the output
+  // Verify the quotes were preserved in the output
-    IAT_CHECK(captured.find("Hello World") != String::npos);
+  IAT_CHECK(captured.find("Hello World") != String::npos);
-    return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // Registration
 // -------------------------------------------------------------------------
 IAT_BEGIN_TEST_LIST()
-IAT_ADD_TEST(TestBasicRun);
+IAT_ADD_TEST(test_basic_run);
-IAT_ADD_TEST(TestArguments);
+IAT_ADD_TEST(test_arguments);
-IAT_ADD_TEST(TestExitCodes);
+IAT_ADD_TEST(test_exit_codes);
-IAT_ADD_TEST(TestMissingExe);
+IAT_ADD_TEST(test_missing_exe);
-IAT_ADD_TEST(TestLargeOutput);
+IAT_ADD_TEST(test_large_output);
-IAT_ADD_TEST(TestMultiLine);
+IAT_ADD_TEST(test_multi_line);
-IAT_ADD_TEST(TestComplexArguments);
+IAT_ADD_TEST(test_complex_arguments);
 IAT_END_TEST_LIST()
 
 IAT_END_BLOCK()

Tests/Unit/RingBuffer.cpp

@@ -23,80 +23,102 @@ IAT_BEGIN_BLOCK(Core, RingBuffer)
 // -------------------------------------------------------------------------
 // 1. Basic Push Pop
 // -------------------------------------------------------------------------
-bool TestPushPop() {
+auto test_push_pop() -> bool {
   // Allocate raw memory for the ring buffer
   // ControlBlock (128 bytes) + Data
-  std::vector<u8> memory(sizeof(RingBufferView::ControlBlock) + 1024);
+  Vec<u8> memory(sizeof(RingBufferView::ControlBlock) + 1024);
 
   // Initialize as OWNER (Producer)
-  RingBufferView producer(std::span<u8>(memory), TRUE);
+  auto producer_res = RingBufferView::create(Span<u8>(memory), true);
+  IAT_CHECK(producer_res.has_value());
+  auto producer = std::move(*producer_res);
 
   // Initialize as CONSUMER (Pointer to same memory)
-  RingBufferView consumer(std::span<u8>(memory), FALSE);
+  auto consumer_res = RingBufferView::create(Span<u8>(memory), false);
+  IAT_CHECK(consumer_res.has_value());
+  auto consumer = std::move(*consumer_res);
 
   // Data to send
   String msg = "Hello RingBuffer";
-  bool pushed = producer.Push(1, {(const u8 *)msg.data(), msg.size()});
+  const auto push_res = producer.push(
-  IAT_CHECK(pushed);
+      1, Span<const u8>(reinterpret_cast<const u8 *>(msg.data()), msg.size()));
+  IAT_CHECK(push_res.has_value());
 
   // Read back
   RingBufferView::PacketHeader header;
-  u8 readBuf[128];
+  u8 read_buf[128];
 
-  i32 bytesRead = consumer.Pop(header, std::span<u8>(readBuf, 128));
+  const auto pop_res = consumer.pop(header, Span<u8>(read_buf, 128));
+  IAT_CHECK(pop_res.has_value());
 
-  IAT_CHECK_EQ(header.ID, (u16)1);
+  const auto bytes_read_opt = *pop_res;
-  IAT_CHECK_EQ(bytesRead, (i32)msg.size());
+  IAT_CHECK(bytes_read_opt.has_value());
 
-  String readMsg((char *)readBuf, bytesRead);
+  const usize bytes_read = *bytes_read_opt;
-  IAT_CHECK_EQ(readMsg, msg);
 
-  return TRUE;
+  IAT_CHECK_EQ(header.id, static_cast<u16>(1));
+  IAT_CHECK_EQ(bytes_read, static_cast<usize>(msg.size()));
+
+  String read_msg(reinterpret_cast<char *>(read_buf), bytes_read);
+  IAT_CHECK_EQ(read_msg, msg);
+
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // 2. Wrap Around
 // -------------------------------------------------------------------------
-bool TestWrapAround() {
+auto test_wrap_around() -> bool {
   // Small buffer to force wrapping quickly
   // Capacity will be 100 bytes
-  std::vector<u8> memory(sizeof(RingBufferView::ControlBlock) + 100);
+  Vec<u8> memory(sizeof(RingBufferView::ControlBlock) + 100);
-  RingBufferView rb(std::span<u8>(memory), TRUE);
+
+  auto rb_res = RingBufferView::create(Span<u8>(memory), true);
+  IAT_CHECK(rb_res.has_value());
+  auto rb = std::move(*rb_res);
 
   // Fill buffer to near end
   // Push 80 bytes
-  std::vector<u8> junk(80, 0xFF);
+  Vec<u8> junk(80, 0xFF);
-  rb.Push(1, junk);
+  const auto push1 = rb.push(1, junk);
+  IAT_CHECK(push1.has_value());
 
   // Pop them to advance READ cursor
   RingBufferView::PacketHeader header;
-  u8 outBuf[100];
+  u8 out_buf[100];
-  rb.Pop(header, outBuf);
+  const auto pop1 = rb.pop(header, out_buf);
+  IAT_CHECK(pop1.has_value());
+  IAT_CHECK(pop1->has_value());
 
   // Now READ and WRITE are near index 80.
   // Pushing 40 bytes should trigger a wrap-around (split write)
-  std::vector<u8> wrapData(40, 0xAA);
+  Vec<u8> wrap_data(40, 0xAA);
-  bool pushed = rb.Push(2, wrapData);
+  const auto push2 = rb.push(2, wrap_data);
-  IAT_CHECK(pushed);
+  IAT_CHECK(push2.has_value());
 
   // Pop and verify integrity
-  i32 popSize = rb.Pop(header, outBuf);
+  const auto pop2 = rb.pop(header, out_buf);
-  IAT_CHECK_EQ(popSize, 40);
+  IAT_CHECK(pop2.has_value());
+  IAT_CHECK(pop2->has_value());
+
+  const usize pop_size = *pop2.value();
+  IAT_CHECK_EQ(pop_size, static_cast<usize>(40));
 
   // Check if data is intact
-  bool match = TRUE;
+  bool match = true;
-  for (int i = 0; i < 40; i++) {
+  for (usize i = 0; i < 40; i++) {
-    if (outBuf[i] != 0xAA)
+    if (out_buf[i] != 0xAA) {
-      match = FALSE;
+      match = false;
+    }
   }
   IAT_CHECK(match);
 
-  return TRUE;
+  return true;
 }
 
 IAT_BEGIN_TEST_LIST()
-IAT_ADD_TEST(TestPushPop);
+IAT_ADD_TEST(test_push_pop);
-IAT_ADD_TEST(TestWrapAround);
+IAT_ADD_TEST(test_wrap_around);
 IAT_END_TEST_LIST()
 
 IAT_END_BLOCK()

Tests/Unit/SIMD/FloatVec4.cpp

@@ -13,92 +13,88 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include <IACore/SIMD.hpp>
 #include <IACore/IATest.hpp>
+#include <IACore/SIMD.hpp>
 
 using namespace IACore;
 
 IAT_BEGIN_BLOCK(Core, FloatVec4)
 
-bool TestFloatArithmetic()
+auto test_float_arithmetic() -> bool {
-{
+  FloatVec4 v1(10.0f, 20.0f, 30.0f, 40.0f);
-    FloatVec4 v1(10.0f, 20.0f, 30.0f, 40.0f);
+  FloatVec4 v2(2.0f, 4.0f, 5.0f, 8.0f);
-    FloatVec4 v2(2.0f, 4.0f, 5.0f, 8.0f);
 
-    alignas(16) f32 res[4];
+  alignas(16) f32 res[4];
 
-    (v1 / v2).Store(res);
+  (v1 / v2).store(res);
-    IAT_CHECK_APPROX(res[0], 5.0f);
+  IAT_CHECK_APPROX(res[0], 5.0f);
-    IAT_CHECK_APPROX(res[3], 5.0f);
+  IAT_CHECK_APPROX(res[3], 5.0f);
 
-    (v1 * v2).Store(res);
+  (v1 * v2).store(res);
-    IAT_CHECK_APPROX(res[0], 20.0f);
+  IAT_CHECK_APPROX(res[0], 20.0f);
 
-    (v1 + v2).Store(res);
+  (v1 + v2).store(res);
-    IAT_CHECK_APPROX(res[0], 12.0f);
+  IAT_CHECK_APPROX(res[0], 12.0f);
 
-    return TRUE;
+  return true;
 }
 
-bool TestMathHelpers()
+auto test_math_helpers() -> bool {
-{
+  alignas(16) f32 res[4];
-    alignas(16) f32 res[4];
 
-    FloatVec4 vSq(4.0f, 9.0f, 16.0f, 25.0f);
+  FloatVec4 v_sq(4.0f, 9.0f, 16.0f, 25.0f);
-    vSq.Sqrt().Store(res);
+  v_sq.sqrt().store(res);
-    IAT_CHECK_APPROX(res[0], 2.0f);
+  IAT_CHECK_APPROX(res[0], 2.0f);
-    IAT_CHECK_APPROX(res[3], 5.0f);
+  IAT_CHECK_APPROX(res[3], 5.0f);
 
-    FloatVec4 vNeg(-1.0f, -5.0f, 10.0f, -0.0f);
+  FloatVec4 v_neg(-1.0f, -5.0f, 10.0f, -0.0f);
-    vNeg.Abs().Store(res);
+  v_neg.abs().store(res);
-    IAT_CHECK_APPROX(res[0], 1.0f);
+  IAT_CHECK_APPROX(res[0], 1.0f);
-    IAT_CHECK_APPROX(res[2], 10.0f);
+  IAT_CHECK_APPROX(res[2], 10.0f);
 
-    FloatVec4 vClamp(-100.0f, 0.0f, 50.0f, 200.0f);
+  FloatVec4 v_clamp(-100.0f, 0.0f, 50.0f, 200.0f);
-    vClamp.Clamp(0.0f, 100.0f).Store(res);
+  v_clamp.clamp(0.0f, 100.0f).store(res);
-    IAT_CHECK_APPROX(res[0], 0.0f);
+  IAT_CHECK_APPROX(res[0], 0.0f);
-    IAT_CHECK_APPROX(res[2], 50.0f);
+  IAT_CHECK_APPROX(res[2], 50.0f);
-    IAT_CHECK_APPROX(res[3], 100.0f);
+  IAT_CHECK_APPROX(res[3], 100.0f);
 
-    return TRUE;
+  return true;
 }
 
-bool TestApproxMath()
+auto test_approx_math() -> bool {
-{
+  alignas(16) f32 res[4];
-    alignas(16) f32 res[4];
+  FloatVec4 v(16.0f, 25.0f, 100.0f, 1.0f);
-    FloatVec4 v(16.0f, 25.0f, 100.0f, 1.0f);
 
-    v.Rsqrt().Store(res);
+  v.rsqrt().store(res);
 
-    IAT_CHECK_APPROX(res[0], 0.25f);
+  IAT_CHECK_APPROX(res[0], 0.25f);
-    IAT_CHECK_APPROX(res[2], 0.1f);
+  IAT_CHECK_APPROX(res[2], 0.1f);
 
-    return TRUE;
+  return true;
 }
 
-bool TestLinearAlgebra()
+auto test_linear_algebra() -> bool {
-{
+  FloatVec4 v1(1.0f, 2.0f, 3.0f, 4.0f);
-    FloatVec4 v1(1.0f, 2.0f, 3.0f, 4.0f);
+  FloatVec4 v2(1.0f, 0.0f, 1.0f, 0.0f);
-    FloatVec4 v2(1.0f, 0.0f, 1.0f, 0.0f);
 
-    f32 dot = v1.Dot(v2);
+  f32 dot = v1.dot(v2);
-    IAT_CHECK_APPROX(dot, 4.0f);
+  IAT_CHECK_APPROX(dot, 4.0f);
 
-    FloatVec4 vNorm(10.0f, 0.0f, 0.0f, 0.0f);
+  FloatVec4 v_norm(10.0f, 0.0f, 0.0f, 0.0f);
-    alignas(16) f32 res[4];
+  alignas(16) f32 res[4];
 
-    vNorm.Normalize().Store(res);
+  v_norm.normalize().store(res);
-    IAT_CHECK_APPROX(res[0], 1.0f);
+  IAT_CHECK_APPROX(res[0], 1.0f);
-    IAT_CHECK_APPROX(res[1], 0.0f);
+  IAT_CHECK_APPROX(res[1], 0.0f);
 
-    return TRUE;
+  return true;
 }
 
 IAT_BEGIN_TEST_LIST()
-IAT_ADD_TEST(TestFloatArithmetic);
+IAT_ADD_TEST(test_float_arithmetic);
-IAT_ADD_TEST(TestMathHelpers);
+IAT_ADD_TEST(test_math_helpers);
-IAT_ADD_TEST(TestApproxMath);
+IAT_ADD_TEST(test_approx_math);
-IAT_ADD_TEST(TestLinearAlgebra);
+IAT_ADD_TEST(test_linear_algebra);
 IAT_END_TEST_LIST()
 
 IAT_END_BLOCK()

Tests/Unit/SIMD/IntVec4.cpp

@@ -13,138 +13,130 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-// IACore-OSS; The Core Library for All IA Open Source Projects
-// Copyright (C) 2026 IAS (ias@iasoft.dev)
-
-#include <IACore/SIMD.hpp>
 #include <IACore/IATest.hpp>
+#include <IACore/SIMD.hpp>
 
 using namespace IACore;
 
 IAT_BEGIN_BLOCK(Core, IntVec4)
 
-bool TestConstructors()
+auto test_constructors() -> bool {
-{
+  IntVec4 v_broadcast(10);
-    IntVec4 vBroadcast(10);
+  alignas(16) u32 store_buf[4];
-    alignas(16) u32 storeBuf[4];
+  v_broadcast.store(store_buf);
-    vBroadcast.Store(storeBuf);
 
-    IAT_CHECK_EQ(storeBuf[0], 10U);
+  IAT_CHECK_EQ(store_buf[0], 10U);
-    IAT_CHECK_EQ(storeBuf[3], 10U);
+  IAT_CHECK_EQ(store_buf[3], 10U);
 
-    IntVec4 vComp(1, 2, 3, 4);
+  IntVec4 v_comp(1, 2, 3, 4);
-    vComp.Store(storeBuf);
+  v_comp.store(store_buf);
-    IAT_CHECK_EQ(storeBuf[0], 1U);
+  IAT_CHECK_EQ(store_buf[0], 1U);
-    IAT_CHECK_EQ(storeBuf[3], 4U);
+  IAT_CHECK_EQ(store_buf[3], 4U);
 
-    alignas(16) u32 srcBuf[4] = {100, 200, 300, 400};
+  alignas(16) u32 src_buf[4] = {100, 200, 300, 400};
-    IntVec4 vLoad = IntVec4::Load(srcBuf);
+  IntVec4 v_load = IntVec4::load(src_buf);
-    vLoad.Store(storeBuf);
+  v_load.store(store_buf);
-    IAT_CHECK_EQ(storeBuf[1], 200U);
+  IAT_CHECK_EQ(store_buf[1], 200U);
 
-    return TRUE;
+  return true;
 }
 
-bool TestArithmetic()
+auto test_arithmetic() -> bool {
-{
+  const IntVec4 v1(10, 20, 30, 40);
-    IntVec4 v1(10, 20, 30, 40);
+  const IntVec4 v2(1, 2, 3, 4);
-    IntVec4 v2(1, 2, 3, 4);
 
-    IntVec4 vAdd = v1 + v2;
+  IntVec4 v_add = v1 + v2;
-    alignas(16) u32 res[4];
+  alignas(16) u32 res[4];
-    vAdd.Store(res);
+  v_add.store(res);
-    IAT_CHECK_EQ(res[0], 11U);
+  IAT_CHECK_EQ(res[0], 11U);
-    IAT_CHECK_EQ(res[3], 44U);
+  IAT_CHECK_EQ(res[3], 44U);
 
-    IntVec4 vSub = v1 - v2;
+  IntVec4 v_sub = v1 - v2;
-    vSub.Store(res);
+  v_sub.store(res);
-    IAT_CHECK_EQ(res[0], 9U);
+  IAT_CHECK_EQ(res[0], 9U);
 
-    IntVec4 vMul = v1 * v2;
+  IntVec4 v_mul = v1 * v2;
-    vMul.Store(res);
+  v_mul.store(res);
-    IAT_CHECK_EQ(res[0], 10U);
+  IAT_CHECK_EQ(res[0], 10U);
-    IAT_CHECK_EQ(res[2], 90U);
+  IAT_CHECK_EQ(res[2], 90U);
-    IAT_CHECK_EQ(res[3], 160U);
+  IAT_CHECK_EQ(res[3], 160U);
 
-    return TRUE;
+  return true;
 }
 
-bool TestBitwise()
+auto test_bitwise() -> bool {
-{
+  const IntVec4 v_all_ones(0xFFFFFFFF);
-    IntVec4 vAllOnes(0xFFFFFFFF);
+  const IntVec4 v_zero((u32)0);
-    IntVec4 vZero((u32) 0);
+  const IntVec4 v_pattern(0xAAAAAAAA);
-    IntVec4 vPattern(0xAAAAAAAA);
 
-    alignas(16) u32 res[4];
+  alignas(16) u32 res[4];
 
-    (vAllOnes & vPattern).Store(res);
+  (v_all_ones & v_pattern).store(res);
-    IAT_CHECK_EQ(res[0], 0xAAAAAAAAU);
+  IAT_CHECK_EQ(res[0], 0xAAAAAAAAU);
 
-    (vZero | vPattern).Store(res);
+  (v_zero | v_pattern).store(res);
-    IAT_CHECK_EQ(res[0], 0xAAAAAAAAU);
+  IAT_CHECK_EQ(res[0], 0xAAAAAAAAU);
 
-    (vAllOnes ^ vPattern).Store(res);
+  (v_all_ones ^ v_pattern).store(res);
-    IAT_CHECK_EQ(res[0], 0x55555555U);
+  IAT_CHECK_EQ(res[0], 0x55555555U);
 
-    (~vPattern).Store(res);
+  (~v_pattern).store(res);
-    IAT_CHECK_EQ(res[0], 0x55555555U);
+  IAT_CHECK_EQ(res[0], 0x55555555U);
 
-    IntVec4 vShift(1);
+  const IntVec4 v_shift(1);
-    (vShift << 1).Store(res);
+  (v_shift << 1).store(res);
-    IAT_CHECK_EQ(res[0], 2U);
+  IAT_CHECK_EQ(res[0], 2U);
 
-    IntVec4 vShiftRight(4);
+  const IntVec4 v_shift_right(4);
-    (vShiftRight >> 1).Store(res);
+  (v_shift_right >> 1).store(res);
-    IAT_CHECK_EQ(res[0], 2U);
+  IAT_CHECK_EQ(res[0], 2U);
 
-    return TRUE;
+  return true;
 }
 
-bool TestSaturation()
+auto test_saturation() -> bool {
-{
+  const u32 max = 0xFFFFFFFF;
-    u32 max = 0xFFFFFFFF;
+  const IntVec4 v_high(max - 10);
-    IntVec4 vHigh(max - 10);
+  const IntVec4 v_add(20);
-    IntVec4 vAdd(20);
 
-    alignas(16) u32 res[4];
+  alignas(16) u32 res[4];
 
-    vHigh.SatAdd(vAdd).Store(res);
+  v_high.sat_add(v_add).store(res);
-    IAT_CHECK_EQ(res[0], max);
+  IAT_CHECK_EQ(res[0], max);
 
-    IntVec4 vLow(10);
+  const IntVec4 v_low(10);
-    IntVec4 vSub(20);
+  const IntVec4 v_sub(20);
-    vLow.SatSub(vSub).Store(res);
+  v_low.sat_sub(v_sub).store(res);
-    IAT_CHECK_EQ(res[0], 0U);
+  IAT_CHECK_EQ(res[0], 0U);
 
-    return TRUE;
+  return true;
 }
 
-bool TestAdvancedOps()
+auto test_advanced_ops() -> bool {
-{
+  const IntVec4 v(0, 50, 100, 150);
-    IntVec4 v(0, 50, 100, 150);
+  alignas(16) u32 res[4];
-    alignas(16) u32 res[4];
 
-    v.Clamp(40, 110).Store(res);
+  v.clamp(40, 110).store(res);
-    IAT_CHECK_EQ(res[0], 40U);
+  IAT_CHECK_EQ(res[0], 40U);
-    IAT_CHECK_EQ(res[1], 50U);
+  IAT_CHECK_EQ(res[1], 50U);
-    IAT_CHECK_EQ(res[2], 100U);
+  IAT_CHECK_EQ(res[2], 100U);
-    IAT_CHECK_EQ(res[3], 110U);
+  IAT_CHECK_EQ(res[3], 110U);
 
-    IntVec4 A(2);
+  const IntVec4 a(2);
-    IntVec4 B(10);
+  const IntVec4 b(10);
-    IntVec4 C(5);
+  const IntVec4 c(5);
-    A.MultAdd(B, C).Store(res);
+  a.mult_add(b, c).store(res);
-    IAT_CHECK_EQ(res[0], 25U);
+  IAT_CHECK_EQ(res[0], 25U);
 
-    return TRUE;
+  return true;
 }
 
 IAT_BEGIN_TEST_LIST()
-IAT_ADD_TEST(TestConstructors);
+IAT_ADD_TEST(test_constructors);
-IAT_ADD_TEST(TestArithmetic);
+IAT_ADD_TEST(test_arithmetic);
-IAT_ADD_TEST(TestBitwise);
+IAT_ADD_TEST(test_bitwise);
-IAT_ADD_TEST(TestSaturation);
+IAT_ADD_TEST(test_saturation);
-IAT_ADD_TEST(TestAdvancedOps);
+IAT_ADD_TEST(test_advanced_ops);
 IAT_END_TEST_LIST()
 
 IAT_END_BLOCK()

Tests/Unit/SocketOps.cpp

@@ -0,0 +1,141 @@
+// IACore-OSS; The Core Library for All IA Open Source Projects
+// Copyright (C) 2026 IAS (ias@iasoft.dev)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <IACore/IATest.hpp>
+#include <IACore/SocketOps.hpp>
+
+using namespace IACore;
+
+IAT_BEGIN_BLOCK(Core, SocketOps)
+
+// -------------------------------------------------------------------------
+// 1. Initialization Logic
+// -------------------------------------------------------------------------
+auto test_initialization() -> bool {
+  IAT_CHECK(SocketOps::is_initialized());
+
+  // Increment ref count
+  const auto res = SocketOps::initialize();
+  IAT_CHECK(res.has_value());
+
+  // Decrement ref count
+  SocketOps::terminate();
+
+  // Should still be initialized (ref count > 0)
+  IAT_CHECK(SocketOps::is_initialized());
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 2. Port Availability Checks
+// -------------------------------------------------------------------------
+auto test_port_availability() -> bool {
+  // We cannot easily guarantee a port is free or taken without binding it,
+  // and SocketOps doesn't expose a generic TCP bind in its public API
+  // (only Unix sockets).
+  // However, we can verify the functions execute without crashing.
+
+  const u16 port = 54321;
+
+  // These return bools, we just ensure they run.
+  (void)SocketOps::is_port_available_tcp(port);
+  (void)SocketOps::is_port_available_udp(port);
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 3. Unix Domain Socket Lifecycle (Create, Bind, Listen, Connect)
+// -------------------------------------------------------------------------
+auto test_unix_socket_lifecycle() -> bool {
+  const String socket_path = "iatest_ipc.sock";
+
+  // Ensure clean state
+  SocketOps::unlink_file(socket_path.c_str());
+
+  // 1. Create Server Socket
+  auto server_res = SocketOps::create_unix_socket();
+  IAT_CHECK(server_res.has_value());
+  SocketHandle server = *server_res;
+
+  // 2. Bind
+  auto bind_res = SocketOps::bind_unix_socket(server, socket_path.c_str());
+  if (!bind_res) {
+    // If bind fails (e.g. permissions), we clean up and fail the test
+    SocketOps::close(server);
+    return false;
+  }
+
+  // 3. Listen
+  auto listen_res = SocketOps::listen(server);
+  IAT_CHECK(listen_res.has_value());
+
+  // 4. Create Client Socket
+  auto client_res = SocketOps::create_unix_socket();
+  IAT_CHECK(client_res.has_value());
+  SocketHandle client = *client_res;
+
+  // 5. Connect
+  // Note: This relies on the OS backlog. We aren't calling accept() on the
+  // server, but connect() should succeed if the server is listening.
+  auto connect_res =
+      SocketOps::connect_unix_socket(client, socket_path.c_str());
+  IAT_CHECK(connect_res.has_value());
+
+  // 6. Cleanup
+  SocketOps::close(client);
+  SocketOps::close(server);
+  SocketOps::unlink_file(socket_path.c_str());
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 4. Unix Socket Error Handling
+// -------------------------------------------------------------------------
+auto test_unix_socket_errors() -> bool {
+  const String socket_path = "iatest_missing.sock";
+
+  // Ensure it doesn't exist
+  SocketOps::unlink_file(socket_path.c_str());
+
+  auto client_res = SocketOps::create_unix_socket();
+  IAT_CHECK(client_res.has_value());
+  SocketHandle client = *client_res;
+
+  // Should fail to connect to non-existent file
+  auto connect_res =
+      SocketOps::connect_unix_socket(client, socket_path.c_str());
+  IAT_CHECK_NOT(connect_res.has_value());
+
+  SocketOps::close(client);
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// Registration
+// -------------------------------------------------------------------------
+IAT_BEGIN_TEST_LIST()
+IAT_ADD_TEST(test_initialization);
+IAT_ADD_TEST(test_port_availability);
+IAT_ADD_TEST(test_unix_socket_lifecycle);
+IAT_ADD_TEST(test_unix_socket_errors);
+IAT_END_TEST_LIST()
+
+IAT_END_BLOCK()
+
+IAT_REGISTER_ENTRY(Core, SocketOps)

Tests/Unit/StreamReader.cpp

@@ -13,9 +13,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include <IACore/StreamReader.hpp>
-
 #include <IACore/IATest.hpp>
+#include <IACore/StreamReader.hpp>
 
 using namespace IACore;
 
@@ -24,71 +23,72 @@ IAT_BEGIN_BLOCK(Core, StreamReader)
 // -------------------------------------------------------------------------
 // 1. Basic Primitive Reading (u8)
 // -------------------------------------------------------------------------
-bool TestReadUint8() {
+auto test_read_uint8() -> bool {
   u8 data[] = {0xAA, 0xBB, 0xCC};
   StreamReader reader(data);
 
   // Read First Byte
-  auto val1 = reader.Read<u8>();
+  auto val1 = reader.read<u8>();
   IAT_CHECK(val1.has_value());
   IAT_CHECK_EQ(*val1, 0xAA);
-  IAT_CHECK_EQ(reader.Cursor(), (usize)1);
+  IAT_CHECK_EQ(reader.cursor(), static_cast<usize>(1));
 
   // Read Second Byte
-  auto val2 = reader.Read<u8>();
+  auto val2 = reader.read<u8>();
+  IAT_CHECK(val2.has_value());
   IAT_CHECK_EQ(*val2, 0xBB);
 
-  return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // 2. Multi-byte Reading (Endianness check)
 // -------------------------------------------------------------------------
-bool TestReadMultiByte() {
+auto test_read_multi_byte() -> bool {
   // 0x04030201 in Little Endian memory layout
   // IACore always assumes a Little Endian machine
   u8 data[] = {0x01, 0x02, 0x03, 0x04};
   StreamReader reader(data);
 
-  auto val = reader.Read<u32>();
+  auto val = reader.read<u32>();
   IAT_CHECK(val.has_value());
 
-  IAT_CHECK_EQ(*val, (u32)0x04030201);
+  IAT_CHECK_EQ(*val, static_cast<u32>(0x04030201));
 
-  IAT_CHECK_EQ(reader.Cursor(), (usize)4);
+  IAT_CHECK_EQ(reader.cursor(), static_cast<usize>(4));
-  IAT_CHECK(reader.IsEOF());
+  IAT_CHECK(reader.is_eof());
 
-  return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // 3. Floating Point (Approx check)
 // -------------------------------------------------------------------------
-bool TestReadFloat() {
+auto test_read_float() -> bool {
-  f32 pi = 3.14159f;
+  const f32 pi = 3.14159f;
   // Bit-cast float to bytes for setup
   u8 data[4];
   std::memcpy(data, &pi, 4);
 
   StreamReader reader(data);
-  auto val = reader.Read<f32>();
+  auto val = reader.read<f32>();
 
   IAT_CHECK(val.has_value());
   IAT_CHECK_APPROX(*val, pi);
 
-  return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // 4. Batch Buffer Reading
 // -------------------------------------------------------------------------
-bool TestReadBuffer() {
+auto test_read_buffer() -> bool {
   u8 src[] = {1, 2, 3, 4, 5};
   u8 dst[3] = {0};
   StreamReader reader(src);
 
   // Read 3 bytes into dst
-  auto res = reader.Read(dst, 3);
+  const auto res = reader.read(dst, 3);
   IAT_CHECK(res.has_value());
 
   // Verify dst content
@@ -97,72 +97,72 @@ bool TestReadBuffer() {
   IAT_CHECK_EQ(dst[2], 3);
 
   // Verify cursor
-  IAT_CHECK_EQ(reader.Cursor(), (usize)3);
+  IAT_CHECK_EQ(reader.cursor(), static_cast<usize>(3));
 
-  return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // 5. Navigation (Seek, Skip, Remaining)
 // -------------------------------------------------------------------------
-bool TestNavigation() {
+auto test_navigation() -> bool {
   u8 data[10] = {0}; // Zero init
   StreamReader reader(data);
 
-  IAT_CHECK_EQ(reader.Remaining(), (usize)10);
+  IAT_CHECK_EQ(reader.remaining(), static_cast<usize>(10));
 
   // Skip
-  reader.Skip(5);
+  reader.skip(5);
-  IAT_CHECK_EQ(reader.Cursor(), (usize)5);
+  IAT_CHECK_EQ(reader.cursor(), static_cast<usize>(5));
-  IAT_CHECK_EQ(reader.Remaining(), (usize)5);
+  IAT_CHECK_EQ(reader.remaining(), static_cast<usize>(5));
 
   // Skip clamping
-  reader.Skip(100); // Should clamp to 10
+  reader.skip(100); // Should clamp to 10
-  IAT_CHECK_EQ(reader.Cursor(), (usize)10);
+  IAT_CHECK_EQ(reader.cursor(), static_cast<usize>(10));
-  IAT_CHECK(reader.IsEOF());
+  IAT_CHECK(reader.is_eof());
 
   // Seek
-  reader.Seek(2);
+  reader.seek(2);
-  IAT_CHECK_EQ(reader.Cursor(), (usize)2);
+  IAT_CHECK_EQ(reader.cursor(), static_cast<usize>(2));
-  IAT_CHECK_EQ(reader.Remaining(), (usize)8);
+  IAT_CHECK_EQ(reader.remaining(), static_cast<usize>(8));
-  IAT_CHECK_NOT(reader.IsEOF());
+  IAT_CHECK_NOT(reader.is_eof());
 
-  return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // 6. Error Handling (EOF Protection)
 // -------------------------------------------------------------------------
-bool TestBoundaryChecks() {
+auto test_boundary_checks() -> bool {
   u8 data[] = {0x00, 0x00};
   StreamReader reader(data);
 
   // Valid read
-  UNUSED(reader.Read<u16>());
+  (void)reader.read<u16>();
-  IAT_CHECK(reader.IsEOF());
+  IAT_CHECK(reader.is_eof());
 
   // Invalid Read Primitive
-  auto val = reader.Read<u8>();
+  auto val = reader.read<u8>();
   IAT_CHECK_NOT(val.has_value()); // Should be unexpected
 
   // Invalid Batch Read
   u8 buf[1];
-  auto batch = reader.Read(buf, 1);
+  auto batch = reader.read(buf, 1);
   IAT_CHECK_NOT(batch.has_value());
 
-  return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // Registration
 // -------------------------------------------------------------------------
 IAT_BEGIN_TEST_LIST()
-IAT_ADD_TEST(TestReadUint8);
+IAT_ADD_TEST(test_read_uint8);
-IAT_ADD_TEST(TestReadMultiByte);
+IAT_ADD_TEST(test_read_multi_byte);
-IAT_ADD_TEST(TestReadFloat);
+IAT_ADD_TEST(test_read_float);
-IAT_ADD_TEST(TestReadBuffer);
+IAT_ADD_TEST(test_read_buffer);
-IAT_ADD_TEST(TestNavigation);
+IAT_ADD_TEST(test_navigation);
-IAT_ADD_TEST(TestBoundaryChecks);
+IAT_ADD_TEST(test_boundary_checks);
 IAT_END_TEST_LIST()
 
 IAT_END_BLOCK()

Tests/Unit/StreamWriter.cpp

@@ -0,0 +1,144 @@
+// IACore-OSS; The Core Library for All IA Open Source Projects
+// Copyright (C) 2026 IAS (ias@iasoft.dev)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <IACore/FileOps.hpp>
+#include <IACore/IATest.hpp>
+#include <IACore/StreamWriter.hpp>
+
+using namespace IACore;
+
+IAT_BEGIN_BLOCK(Core, StreamWriter)
+
+// -------------------------------------------------------------------------
+// 1. Memory Writer (Dynamic Vector)
+// -------------------------------------------------------------------------
+auto test_memory_writer() -> bool {
+  StreamWriter writer;
+
+  // Write single byte repeated
+  IAT_CHECK(writer.write(static_cast<u8>(0xAA), 1).has_value());
+
+  // Write primitive (u32) - 0x12345678
+  // Little Endian: 78 56 34 12
+  const u32 val = 0x12345678;
+  IAT_CHECK(writer.write(val).has_value());
+
+  // Check cursor
+  IAT_CHECK_EQ(writer.cursor(), static_cast<usize>(1 + 4));
+
+  // Check data content
+  const u8 *ptr = writer.data();
+  IAT_CHECK_EQ(ptr[0], 0xAA);
+  IAT_CHECK_EQ(ptr[1], 0x78);
+  IAT_CHECK_EQ(ptr[4], 0x12);
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 2. Fixed Buffer Writer (Non-Owning)
+// -------------------------------------------------------------------------
+auto test_fixed_buffer() -> bool {
+  u8 buffer[4] = {0};
+  StreamWriter writer(Span<u8>(buffer, 4));
+
+  // Write 2 bytes
+  IAT_CHECK(writer.write(static_cast<u8>(0xFF), 2).has_value());
+  IAT_CHECK_EQ(writer.cursor(), static_cast<usize>(2));
+
+  // Write 2 more bytes
+  IAT_CHECK(writer.write(static_cast<u8>(0xEE), 2).has_value());
+  IAT_CHECK_EQ(writer.cursor(), static_cast<usize>(4));
+
+  // Write 1 more byte -> Should fail (Out of bounds)
+  const auto res = writer.write(static_cast<u8>(0x00), 1);
+  IAT_CHECK_NOT(res.has_value());
+
+  // Verify content
+  IAT_CHECK_EQ(buffer[0], 0xFF);
+  IAT_CHECK_EQ(buffer[1], 0xFF);
+  IAT_CHECK_EQ(buffer[2], 0xEE);
+  IAT_CHECK_EQ(buffer[3], 0xEE);
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 3. File Writer
+// -------------------------------------------------------------------------
+auto test_file_writer() -> bool {
+  const Path path = "test_stream_writer.bin";
+
+  // Ensure clean state
+  if (std::filesystem::exists(path)) {
+    std::filesystem::remove(path);
+  }
+
+  {
+    auto res = StreamWriter::create_from_file(path);
+    IAT_CHECK(res.has_value());
+    StreamWriter writer = std::move(*res);
+
+    const String hello = "Hello World";
+    IAT_CHECK(writer.write(hello.data(), hello.size()).has_value());
+
+    // Explicit flush
+    IAT_CHECK(writer.flush().has_value());
+  }
+
+  // Verify file content via FileOps
+  auto read_res = FileOps::read_binary_file(path);
+  IAT_CHECK(read_res.has_value());
+
+  const String read_str(reinterpret_cast<const char *>(read_res->data()),
+                        read_res->size());
+  IAT_CHECK_EQ(read_str, String("Hello World"));
+
+  // Cleanup
+  std::filesystem::remove(path);
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 4. Primitive Types
+// -------------------------------------------------------------------------
+auto test_primitives() -> bool {
+  StreamWriter writer;
+
+  const f32 f = 1.5f;
+  const u64 big = 0xDEADBEEFCAFEBABE;
+
+  IAT_CHECK(writer.write(f).has_value());
+  IAT_CHECK(writer.write(big).has_value());
+
+  IAT_CHECK_EQ(writer.cursor(), sizeof(f32) + sizeof(u64));
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// Registration
+// -------------------------------------------------------------------------
+IAT_BEGIN_TEST_LIST()
+IAT_ADD_TEST(test_memory_writer);
+IAT_ADD_TEST(test_fixed_buffer);
+IAT_ADD_TEST(test_file_writer);
+IAT_ADD_TEST(test_primitives);
+IAT_END_TEST_LIST()
+
+IAT_END_BLOCK()
+
+IAT_REGISTER_ENTRY(Core, StreamWriter)

Tests/Unit/StringOps.cpp

@@ -0,0 +1,125 @@
+// IACore-OSS; The Core Library for All IA Open Source Projects
+// Copyright (C) 2026 IAS (ias@iasoft.dev)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <IACore/IATest.hpp>
+#include <IACore/StringOps.hpp>
+
+using namespace IACore;
+
+IAT_BEGIN_BLOCK(Core, StringOps)
+
+// -------------------------------------------------------------------------
+// 1. Base64 Encoding
+// -------------------------------------------------------------------------
+auto test_base64_encode() -> bool {
+  // Case 1: Standard text
+  {
+    const String s = "Hello World";
+    const Span<const u8> data(reinterpret_cast<const u8 *>(s.data()), s.size());
+    const String encoded = StringOps::encode_base64(data);
+    IAT_CHECK_EQ(encoded, String("SGVsbG8gV29ybGQ="));
+  }
+
+  // Case 2: Padding Logic (1 byte -> 2 pad)
+  {
+    const String s = "M";
+    const Span<const u8> data(reinterpret_cast<const u8 *>(s.data()), s.size());
+    const String encoded = StringOps::encode_base64(data);
+    IAT_CHECK_EQ(encoded, String("TQ=="));
+  }
+
+  // Case 3: Padding Logic (2 bytes -> 1 pad)
+  {
+    const String s = "Ma";
+    const Span<const u8> data(reinterpret_cast<const u8 *>(s.data()), s.size());
+    const String encoded = StringOps::encode_base64(data);
+    IAT_CHECK_EQ(encoded, String("TWE="));
+  }
+
+  // Case 4: Padding Logic (3 bytes -> 0 pad)
+  {
+    const String s = "Man";
+    const Span<const u8> data(reinterpret_cast<const u8 *>(s.data()), s.size());
+    const String encoded = StringOps::encode_base64(data);
+    IAT_CHECK_EQ(encoded, String("TWFu"));
+  }
+
+  // Case 5: Empty
+  {
+    const String encoded = StringOps::encode_base64({});
+    IAT_CHECK(encoded.empty());
+  }
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 2. Base64 Decoding
+// -------------------------------------------------------------------------
+auto test_base64_decode() -> bool {
+  // Case 1: Standard text
+  {
+    const String encoded = "SGVsbG8gV29ybGQ=";
+    const Vec<u8> decoded = StringOps::decode_base64(encoded);
+    const String result(reinterpret_cast<const char *>(decoded.data()),
+                        decoded.size());
+    IAT_CHECK_EQ(result, String("Hello World"));
+  }
+
+  // Case 2: Empty
+  {
+    const Vec<u8> decoded = StringOps::decode_base64("");
+    IAT_CHECK(decoded.empty());
+  }
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 3. Round Trip (Binary Data)
+// -------------------------------------------------------------------------
+auto test_base64_round_trip() -> bool {
+  Vec<u8> original;
+  original.reserve(256);
+  for (usize i = 0; i < 256; ++i) {
+    original.push_back(static_cast<u8>(i));
+  }
+
+  const String encoded = StringOps::encode_base64(original);
+  const Vec<u8> decoded = StringOps::decode_base64(encoded);
+
+  IAT_CHECK_EQ(original.size(), decoded.size());
+
+  bool match = true;
+  for (usize i = 0; i < original.size(); ++i) {
+    if (original[i] != decoded[i]) {
+      match = false;
+      break;
+    }
+  }
+  IAT_CHECK(match);
+
+  return true;
+}
+
+IAT_BEGIN_TEST_LIST()
+IAT_ADD_TEST(test_base64_encode);
+IAT_ADD_TEST(test_base64_decode);
+IAT_ADD_TEST(test_base64_round_trip);
+IAT_END_TEST_LIST()
+
+IAT_END_BLOCK()
+
+IAT_REGISTER_ENTRY(Core, StringOps)

Tests/Unit/Utils.cpp

@@ -13,9 +13,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#include <IACore/Utils.hpp>
-
 #include <IACore/IATest.hpp>
+#include <IACore/Utils.hpp>
 
 using namespace IACore;
 
@@ -23,16 +22,14 @@ using namespace IACore;
 // Test Structs for Hashing (Must be defined at Global Scope)
 // -----------------------------------------------------------------------------
 
-struct TestVec3
+struct TestVec3 {
-{
+  f32 x, y, z;
-    f32 x, y, z;
 
-    // Equality operator required for hash maps, though strictly
+  // Equality operator required for hash maps, though strictly
-    // the hash function itself doesn't need it, it's good practice to test both.
+  // the hash function itself doesn't need it, it's good practice to test both.
-    bool operator==(const TestVec3 &other) const
+  bool operator==(const TestVec3 &other) const {
-    {
+    return x == other.x && y == other.y && z == other.z;
-        return x == other.x && y == other.y && z == other.z;
+  }
-    }
 };
 
 // Inject the hash specialization into the ankerl namespace
@@ -48,173 +45,167 @@ IAT_BEGIN_BLOCK(Core, Utils)
 // -------------------------------------------------------------------------
 // 1. Binary <-> Hex String Conversion
 // -------------------------------------------------------------------------
-bool TestHexConversion()
+auto test_hex_conversion() -> bool {
-{
+  // A. Binary To Hex
-    // A. Binary To Hex
+  u8 bin[] = {0xDE, 0xAD, 0xBE, 0xEF, 0x00, 0xFF};
-    u8 bin[] = {0xDE, 0xAD, 0xBE, 0xEF, 0x00, 0xFF};
+  String hex = Utils::binary_to_hex_string(bin);
-    String hex = IACore::Utils::BinaryToHexString(bin);
 
-    IAT_CHECK_EQ(hex, String("DEADBEEF00FF"));
+  IAT_CHECK_EQ(hex, String("DEADBEEF00FF"));
 
-    // B. Hex To Binary (Valid Upper)
+  // B. Hex To Binary (Valid Upper)
-    auto resUpper = IACore::Utils::HexStringToBinary("DEADBEEF00FF");
+  auto res_upper = Utils::hex_string_to_binary("DEADBEEF00FF");
-    IAT_CHECK(resUpper.has_value());
+  IAT_CHECK(res_upper.has_value());
-    IAT_CHECK_EQ(resUpper->size(), (usize) 6);
+  IAT_CHECK_EQ(res_upper->size(), static_cast<usize>(6));
-    IAT_CHECK_EQ((*resUpper)[0], 0xDE);
+  IAT_CHECK_EQ((*res_upper)[0], 0xDE);
-    IAT_CHECK_EQ((*resUpper)[5], 0xFF);
+  IAT_CHECK_EQ((*res_upper)[5], 0xFF);
 
-    // C. Hex To Binary (Valid Lower/Mixed)
+  // C. Hex To Binary (Valid Lower/Mixed)
-    auto resLower = IACore::Utils::HexStringToBinary("deadbeef00ff");
+  auto res_lower = Utils::hex_string_to_binary("deadbeef00ff");
-    IAT_CHECK(resLower.has_value());
+  IAT_CHECK(res_lower.has_value());
-    IAT_CHECK_EQ((*resLower)[0], 0xDE);
+  IAT_CHECK_EQ((*res_lower)[0], 0xDE);
 
-    // D. Round Trip Integrity
+  // D. Round Trip Integrity
-    Vec<u8> original = {1, 2, 3, 4, 5};
+  Vec<u8> original = {1, 2, 3, 4, 5};
-    String s = IACore::Utils::BinaryToHexString(original);
+  String s = Utils::binary_to_hex_string(original);
-    auto back = IACore::Utils::HexStringToBinary(s);
+  auto back = Utils::hex_string_to_binary(s);
-    IAT_CHECK(back.has_value());
+  IAT_CHECK(back.has_value());
-    IAT_CHECK_EQ(original.size(), back->size());
+  IAT_CHECK_EQ(original.size(), back->size());
-    IAT_CHECK_EQ(original[2], (*back)[2]);
+  IAT_CHECK_EQ(original[2], (*back)[2]);
 
-    return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // 2. Hex Error Handling
 // -------------------------------------------------------------------------
-bool TestHexErrors()
+auto test_hex_errors() -> bool {
-{
+  // Odd Length
-    // Odd Length
+  auto odd = Utils::hex_string_to_binary("ABC");
-    auto odd = IACore::Utils::HexStringToBinary("ABC");
+  IAT_CHECK_NOT(odd.has_value());
-    IAT_CHECK_NOT(odd.has_value());
 
-    // Invalid Characters
+  // Invalid Characters
-    auto invalid = IACore::Utils::HexStringToBinary("ZZTOP");
+  auto invalid = Utils::hex_string_to_binary("ZZTOP");
-    IAT_CHECK_NOT(invalid.has_value());
+  IAT_CHECK_NOT(invalid.has_value());
 
-    // Empty string is valid (empty vector)
+  // Empty string is valid (empty vector)
-    auto empty = IACore::Utils::HexStringToBinary("");
+  auto empty = Utils::hex_string_to_binary("");
-    IAT_CHECK(empty.has_value());
+  IAT_CHECK(empty.has_value());
-    IAT_CHECK_EQ(empty->size(), (usize) 0);
+  IAT_CHECK_EQ(empty->size(), static_cast<usize>(0));
 
-    return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // 3. Algorithms: Sorting
 // -------------------------------------------------------------------------
-bool TestSort()
+auto test_sort() -> bool {
-{
+  Vec<i32> nums = {5, 1, 4, 2, 3};
-    Vec<int> nums = {5, 1, 4, 2, 3};
 
-    IACore::Utils::Sort(nums);
+  Utils::sort(nums);
 
-    IAT_CHECK_EQ(nums[0], 1);
+  IAT_CHECK_EQ(nums[0], 1);
-    IAT_CHECK_EQ(nums[1], 2);
+  IAT_CHECK_EQ(nums[1], 2);
-    IAT_CHECK_EQ(nums[2], 3);
+  IAT_CHECK_EQ(nums[2], 3);
-    IAT_CHECK_EQ(nums[3], 4);
+  IAT_CHECK_EQ(nums[3], 4);
-    IAT_CHECK_EQ(nums[4], 5);
+  IAT_CHECK_EQ(nums[4], 5);
 
-    return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // 4. Algorithms: Binary Search (Left/Right)
 // -------------------------------------------------------------------------
-bool TestBinarySearch()
+auto test_binary_search() -> bool {
-{
+  // Must be sorted for Binary Search
-    // Must be sorted for Binary Search
+  Vec<i32> nums = {10, 20, 20, 20, 30};
-    Vec<int> nums = {10, 20, 20, 20, 30};
 
-    // Search Left (Lower Bound) -> First element >= value
+  // Search Left (Lower Bound) -> First element >= value
-    auto itLeft = IACore::Utils::BinarySearchLeft(nums, 20);
+  auto it_left = Utils::binary_search_left(nums, 20);
-    IAT_CHECK(itLeft != nums.end());
+  IAT_CHECK(it_left != nums.end());
-    IAT_CHECK_EQ(*itLeft, 20);
+  IAT_CHECK_EQ(*it_left, 20);
-    IAT_CHECK_EQ(std::distance(nums.begin(), itLeft), 1); // Index 1 is first 20
+  IAT_CHECK_EQ(std::distance(nums.begin(), it_left), 1); // Index 1 is first 20
 
-    // Search Right (Upper Bound) -> First element > value
+  // Search Right (Upper Bound) -> First element > value
-    auto itRight = IACore::Utils::BinarySearchRight(nums, 20);
+  auto it_right = Utils::binary_search_right(nums, 20);
-    IAT_CHECK(itRight != nums.end());
+  IAT_CHECK(it_right != nums.end());
-    IAT_CHECK_EQ(*itRight, 30);                            // Points to 30
+  IAT_CHECK_EQ(*it_right, 30);                            // Points to 30
-    IAT_CHECK_EQ(std::distance(nums.begin(), itRight), 4); // Index 4
+  IAT_CHECK_EQ(std::distance(nums.begin(), it_right), 4); // Index 4
 
-    // Search for non-existent
+  // Search for non-existent
-    auto itFail = IACore::Utils::BinarySearchLeft(nums, 99);
+  auto it_fail = Utils::binary_search_left(nums, 99);
-    IAT_CHECK(itFail == nums.end());
+  IAT_CHECK(it_fail == nums.end());
 
-    return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // 5. Hashing Basics
 // -------------------------------------------------------------------------
-bool TestHashBasics()
+auto test_hash_basics() -> bool {
-{
+  u64 h1 = Utils::compute_hash(10, 20.5f, "Hello");
-    u64 h1 = IACore::Utils::ComputeHash(10, 20.5f, "Hello");
+  u64 h2 = Utils::compute_hash(10, 20.5f, "Hello");
-    u64 h2 = IACore::Utils::ComputeHash(10, 20.5f, "Hello");
+  u64 h3 = Utils::compute_hash(10, 20.5f, "World");
-    u64 h3 = IACore::Utils::ComputeHash(10, 20.5f, "World");
 
-    // Determinism
+  // Determinism
-    IAT_CHECK_EQ(h1, h2);
+  IAT_CHECK_EQ(h1, h2);
 
-    // Differentiation
+  // Differentiation
-    IAT_CHECK_NEQ(h1, h3);
+  IAT_CHECK_NEQ(h1, h3);
 
-    // Order sensitivity (Golden ratio combine should care about order)
+  // Order sensitivity (Golden ratio combine should care about order)
-    // Hash(A, B) != Hash(B, A)
+  // Hash(A, B) != Hash(B, A)
-    u64 orderA = IACore::Utils::ComputeHash(1, 2);
+  u64 order_a = Utils::compute_hash(1, 2);
-    u64 orderB = IACore::Utils::ComputeHash(2, 1);
+  u64 order_b = Utils::compute_hash(2, 1);
-    IAT_CHECK_NEQ(orderA, orderB);
+  IAT_CHECK_NEQ(order_a, order_b);
 
-    return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // 6. Macro Verification (IA_MAKE_HASHABLE)
 // -------------------------------------------------------------------------
-bool TestHashMacro()
+auto test_hash_macro() -> bool {
-{
+  TestVec3 v1{1.0f, 2.0f, 3.0f};
-    TestVec3 v1{1.0f, 2.0f, 3.0f};
+  TestVec3 v2{1.0f, 2.0f, 3.0f};
-    TestVec3 v2{1.0f, 2.0f, 3.0f};
+  TestVec3 v3{1.0f, 2.0f, 4.0f};
-    TestVec3 v3{1.0f, 2.0f, 4.0f};
 
-    ankerl::unordered_dense::hash<TestVec3> hasher;
+  ankerl::unordered_dense::hash<TestVec3> hasher;
 
-    u64 h1 = hasher(v1);
+  u64 h1 = hasher(v1);
-    u64 h2 = hasher(v2);
+  u64 h2 = hasher(v2);
-    u64 h3 = hasher(v3);
+  u64 h3 = hasher(v3);
 
-    IAT_CHECK_EQ(h1, h2);  // Same content = same hash
+  IAT_CHECK_EQ(h1, h2);  // Same content = same hash
-    IAT_CHECK_NEQ(h1, h3); // Different content = different hash
+  IAT_CHECK_NEQ(h1, h3); // Different content = different hash
 
-    // -------------------------------------------------------------
+  // -------------------------------------------------------------
-    // Verify ComputeHash integration
+  // Verify ComputeHash integration
-    // -------------------------------------------------------------
+  // -------------------------------------------------------------
 
-    u64 hManual = 0;
+  u64 h_manual = 0;
-    IACore::Utils::HashCombine(hManual, v1);
+  Utils::hash_combine(h_manual, v1);
 
-    u64 hWrapper = IACore::Utils::ComputeHash(v1);
+  u64 h_wrapper = Utils::compute_hash(v1);
 
-    // This proves ComputeHash found the specialization and mixed it correctly
+  // This proves ComputeHash found the specialization and mixed it correctly
-    IAT_CHECK_EQ(hManual, hWrapper);
+  IAT_CHECK_EQ(h_manual, h_wrapper);
 
-    // Verify the avalanche effect took place (hWrapper should NOT be h1)
+  // Verify the avalanche effect took place (hWrapper should NOT be h1)
-    IAT_CHECK_NEQ(h1, hWrapper);
+  IAT_CHECK_NEQ(h1, h_wrapper);
 
-    return TRUE;
+  return true;
 }
 
 // -------------------------------------------------------------------------
 // Registration
 // -------------------------------------------------------------------------
 IAT_BEGIN_TEST_LIST()
-IAT_ADD_TEST(TestHexConversion);
+IAT_ADD_TEST(test_hex_conversion);
-IAT_ADD_TEST(TestHexErrors);
+IAT_ADD_TEST(test_hex_errors);
-IAT_ADD_TEST(TestSort);
+IAT_ADD_TEST(test_sort);
-IAT_ADD_TEST(TestBinarySearch);
+IAT_ADD_TEST(test_binary_search);
-IAT_ADD_TEST(TestHashBasics);
+IAT_ADD_TEST(test_hash_basics);
-IAT_ADD_TEST(TestHashMacro);
+IAT_ADD_TEST(test_hash_macro);
 IAT_END_TEST_LIST()
 
 IAT_END_BLOCK()

Tests/Unit/XML.cpp

@@ -0,0 +1,135 @@
+// IACore-OSS; The Core Library for All IA Open Source Projects
+// Copyright (C) 2026 IAS (ias@iasoft.dev)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <IACore/FileOps.hpp>
+#include <IACore/IATest.hpp>
+#include <IACore/XML.hpp>
+
+using namespace IACore;
+
+IAT_BEGIN_BLOCK(Core, XML)
+
+// -------------------------------------------------------------------------
+// 1. Basic String Parsing
+// -------------------------------------------------------------------------
+auto test_parse_string() -> bool {
+  const String xml_content = R"(
+        <root>
+            <item id="1">Value1</item>
+            <item id="2">Value2</item>
+        </root>
+    )";
+
+  auto res = XML::parse_from_string(xml_content);
+  IAT_CHECK(res.has_value());
+
+  auto &doc = *res;
+  auto root = doc.child("root");
+  IAT_CHECK(root);
+
+  auto item1 = root.find_child_by_attribute("item", "id", "1");
+  IAT_CHECK(item1);
+  IAT_CHECK_EQ(String(item1.child_value()), String("Value1"));
+
+  auto item2 = root.find_child_by_attribute("item", "id", "2");
+  IAT_CHECK(item2);
+  IAT_CHECK_EQ(String(item2.child_value()), String("Value2"));
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 2. Error Handling
+// -------------------------------------------------------------------------
+auto test_parse_error() -> bool {
+  const String invalid_xml = "<root><unclosed>";
+  auto res = XML::parse_from_string(invalid_xml);
+  IAT_CHECK_NOT(res.has_value());
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 3. Serialization
+// -------------------------------------------------------------------------
+auto test_serialize() -> bool {
+  const String xml_content = "<root><node>Text</node></root>";
+  auto res = XML::parse_from_string(xml_content);
+  IAT_CHECK(res.has_value());
+
+  String output = XML::serialize_to_string(*res);
+
+  // Basic containment check as formatting might vary
+  IAT_CHECK(output.find("<root>") != String::npos);
+  IAT_CHECK(output.find("<node>Text</node>") != String::npos);
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 4. String Escaping
+// -------------------------------------------------------------------------
+auto test_escape() -> bool {
+  const String raw = "< & > \" '";
+  const String escaped = XML::escape_xml_string(raw);
+
+  // Check for standard XML entities
+  IAT_CHECK(escaped.find("&lt;") != String::npos);
+  IAT_CHECK(escaped.find("&amp;") != String::npos);
+  IAT_CHECK(escaped.find("&gt;") != String::npos);
+  IAT_CHECK(escaped.find("&quot;") != String::npos);
+  IAT_CHECK(escaped.find("&apos;") != String::npos);
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// 5. File I/O Integration
+// -------------------------------------------------------------------------
+auto test_file_io() -> bool {
+  const Path path = "test_temp_xml_doc.xml";
+  const String content = "<config><ver>1.0</ver></config>";
+
+  // 1. Write Test File
+  auto write_res = FileOps::write_text_file(path, content, true);
+  IAT_CHECK(write_res.has_value());
+
+  // 2. Parse from File
+  auto parse_res = XML::parse_from_file(path);
+  IAT_CHECK(parse_res.has_value());
+
+  auto &doc = *parse_res;
+  IAT_CHECK_EQ(String(doc.child("config").child("ver").child_value()),
+               String("1.0"));
+
+  // 3. Cleanup
+  std::filesystem::remove(path);
+
+  return true;
+}
+
+// -------------------------------------------------------------------------
+// Registration
+// -------------------------------------------------------------------------
+IAT_BEGIN_TEST_LIST()
+IAT_ADD_TEST(test_parse_string);
+IAT_ADD_TEST(test_parse_error);
+IAT_ADD_TEST(test_serialize);
+IAT_ADD_TEST(test_escape);
+IAT_ADD_TEST(test_file_io);
+IAT_END_TEST_LIST()
+
+IAT_END_BLOCK()
+
+IAT_REGISTER_ENTRY(Core, XML)