TestSuite

Tests/Unit/StreamWriter.cpp

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+// 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)