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+# D3D12 测试规范文档
+
+## 1. 测试分类
+
+### 1.1 测试层级
+
+| 层级 | 位置 | 执行方式 | 目的 |
+|------|------|----------|------|
+| 单元测试 | `tests/RHI/D3D12/unit/` | CTest 自动运行 | 验证各组件 API 功能 |
+| 集成测试 | `tests/RHI/D3D12/integration/` | CTest + Python wrapper | 端到端渲染验证 |
+
+### 1.2 单元测试规范
+
+**框架**: Google Test  
+**运行方式**: 
+```bash
+cd build/tests/RHI/D3D12/unit
+ctest -C Debug --output-on-failure
+```
+
+**命名约定**: `Component_Category_SubBehavior`
+- Component: 组件名 (Device, Buffer, Texture, CommandQueue, etc.)
+- Category: 操作类别 (Create, Get, Set, Map, Reset, etc.)
+- SubBehavior: 具体行为 (DefaultHeap, GPUAddress, etc.)
+
+**示例**:
+```
+Device_Create_Success
+Device_Get_AdapterInfo
+Buffer_Create_DefaultHeap
+Buffer_Map_Unmap
+Texture_Create_2D
+```
+
+### 1.3 集成测试规范
+
+**运行方式**: Python wrapper 通过 CTest 调用
+```bash
+cd build/tests/RHI/D3D12/integration
+ctest -C Debug --output-on-failure
+```
+
+**Python Wrapper 职责**:
+1. 启动 D3D12 exe
+2. 等待进程完成
+3. 检查输出文件
+4. 调用 compare_ppm.py 比对 Golden Image
+5. 返回 0(成功)/1(失败)
+
+**Golden Image 规范**:
+- 文件格式: PPM (P6)
+- 存储位置: `tests/RHI/D3D12/integration/`
+- 命名: `GT_<test_name>.ppm`
+- 阈值: 默认 5%
+
+---
+
+## 2. 测试命名规则
+
+### 2.1 禁止模式
+
+❌ 不允许:
+- `*_Placeholder` - 无意义的占位测试
+- 驼峰+下划线混用
+- 空操作测试
+
+### 2.2 标准格式
+
+✅ 正确格式:
+```
+Component_Category_SubBehavior
+```
+
+### 2.3 大小写规则
+
+- 全小写，单词间用下划线分隔
+- Component 名称与类名一致 (如 `CommandQueue` 不是 `Command_queue`)
+
+### 2.4 测试前缀对应关系
+
+| 类名 | 测试前缀 |
+|------|---------|
+| D3D12Device | Device |
+| D3D12CommandQueue | CommandQueue |
+| D3D12CommandAllocator | CommandAllocator |
+| D3D12CommandList | CommandList |
+| D3D12Buffer | Buffer |
+| D3D12Texture | Texture |
+| D3D12DescriptorHeap | DescriptorHeap |
+| D3D12Fence | Fence |
+| D3D12PipelineState | PipelineState |
+| D3D12RootSignature | RootSignature |
+| D3D12Shader | Shader |
+| D3D12RenderTargetView | RTV |
+| D3D12DepthStencilView | DSV |
+
+---
+
+## 3. 测试实现规范
+
+### 3.1 单元测试结构
+
+```cpp
+TEST_F(D3D12TestFixture, Component_Category_SubBehavior) {
+    // Arrange: 准备测试数据
+    
+    // Act: 执行被测操作
+    
+    // Assert: 验证结果
+    ASSERT_TRUE(condition);
+    EXPECT_EQ(expected, actual);
+}
+```
+
+### 3.2 Fixture 使用
+
+```cpp
+class D3D12TestFixture : public ::testing::Test {
+protected:
+    void SetUp() override;   // 创建设备、命令队列等
+    void TearDown() override; // 清理资源
+    
+    ID3D12Device* GetDevice();
+    ID3D12CommandQueue* GetCommandQueue();
+    ID3D12CommandAllocator* GetCommandAllocator();
+    ID3D12GraphicsCommandList* GetCommandList();
+    
+    void WaitForGPU();
+};
+```
+
+### 3.3 错误处理测试
+
+对于负面测试:
+```cpp
+TEST_F(D3D12TestFixture, Component_Create_InvalidSize) {
+    // 测试零大小或负数大小应该失败
+    ASSERT_FALSE(buffer->Initialize(device, 0));
+}
+```
+
+---
+
+## 4. 集成测试规范
+
+### 4.1 Python Wrapper 模板
+
+```python
+import sys
+import os
+import subprocess
+import time
+
+def run_integration_test(exe_path, output_ppm, gt_ppm, threshold, timeout=120):
+    """
+    Run a D3D12 integration test and compare output with golden template.
+    
+    Args:
+        exe_path: Path to the test executable
+        output_ppm: Filename of the output screenshot  
+        gt_ppm: Path to the golden template PPM file
+        threshold: Pixel difference threshold for comparison
+        timeout: Maximum time to wait (seconds)
+    
+    Returns:
+        0 on success, non-zero on failure
+    """
+    # 1. 检查文件存在
+    # 2. 删除旧输出
+    # 3. 启动进程
+    # 4. 等待完成
+    # 5. 检查输出
+    # 6. 比对图片
+    # 7. 返回结果
+```
+
+### 4.2 CTest 注册格式
+
+```cmake
+find_package(Python3 REQUIRED)
+enable_testing()
+
+add_test(NAME TestName
+    COMMAND ${Python3_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/run_integration_test.py
+        $<TARGET_FILE:TargetName>
+        output.ppm
+        ${CMAKE_CURRENT_SOURCE_DIR}/GT.ppm
+        5
+    WORKING_DIRECTORY $<TARGET_FILE_DIR:TargetName>
+)
+```
+
+### 4.3 Golden Image 生成
+
+1. 在干净硬件环境运行集成测试
+2. 截图保存为 `GT_<name>.ppm`
+3. 人工验证截图正确性
+4. 提交到版本控制
+
+---
+
+## 5. CMakeLists.txt 规范
+
+### 5.1 单元测试 CMakeLists.txt
+
+```cmake
+cmake_minimum_required(VERSION 3.15)
+get_filename_component(PROJECT_ROOT_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../../../.. ABSOLUTE)
+
+find_package(GTest REQUIRED)
+
+set(TEST_SOURCES
+    fixtures/D3D12TestFixture.cpp
+    test_device.cpp
+    test_buffer.cpp
+    # ... 其他测试文件
+)
+
+add_executable(d3d12_engine_tests ${TEST_SOURCES})
+
+target_link_libraries(d3d12_engine_tests PRIVATE
+    d3d12
+    dxgi
+    d3dcompiler
+    XCEngine
+    GTest::gtest
+    GTest::gtest_main
+)
+
+target_include_directories(d3d12_engine_tests PRIVATE
+    ${CMAKE_CURRENT_SOURCE_DIR}/fixtures
+    ${PROJECT_ROOT_DIR}/engine/include
+    ${PROJECT_ROOT_DIR}/engine/src
+)
+
+enable_testing()
+add_test(NAME D3D12EngineTests COMMAND d3d12_engine_tests)
+```
+
+### 5.2 集成测试 CMakeLists.txt
+
+```cmake
+cmake_minimum_required(VERSION 3.15)
+project(D3D12_Integration)
+
+set(ENGINE_ROOT_DIR ${CMAKE_SOURCE_DIR}/../engine)
+find_package(Python3 REQUIRED)
+enable_testing()
+
+add_executable(D3D12_Test WIN32 main.cpp)
+
+target_link_libraries(D3D12_Test PRIVATE
+    d3d12 dxgi d3dcompiler winmm XCEngine
+)
+
+# POST_BUILD: 复制资源文件
+add_custom_command(TARGET D3D12_Test POST_BUILD
+    COMMAND ${CMAKE_COMMAND} -E copy_directory
+        ${CMAKE_CURRENT_SOURCE_DIR}/Res
+        $<TARGET_FILE_DIR:D3D12_Test>/Res
+)
+
+# CTest 注册
+add_test(NAME D3D12_Test_Integration
+    COMMAND ${Python3_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/run_integration_test.py
+        $<TARGET_FILE:D3D12_Test>
+        output.ppm
+        ${CMAKE_CURRENT_SOURCE_DIR}/GT.ppm
+        5
+    WORKING_DIRECTORY $<TARGET_FILE_DIR:D3D12_Test>
+)
+```
+
+---
+
+## 6. 测试执行
+
+### 6.1 完整测试流程
+
+```bash
+# 1. 构建
+cd build
+cmake ..
+cmake --build . --target d3d12_engine_tests D3D12_Test --config Debug
+
+# 2. 运行单元测试
+cd tests/RHI/D3D12/unit
+ctest -C Debug --output-on-failure
+
+# 3. 运行集成测试
+cd tests/RHI/D3D12/integration
+ctest -C Debug --output-on-failure
+```
+
+### 6.2 输出格式
+
+成功:
+```
+Test #1: D3D12_Minimal_Integration ....... Passed
+```
+
+失败:
+```
+Test #1: D3D12_Minimal_Integration ....... Failed
+[Integration Test] Different pixels: 39.94%
+FAIL: Images differ!
+```
+
+---
+
+## 7. 文件结构
+
+```
+tests/RHI/D3D12/
+├── CMakeLists.txt
+├── TEST_IMPROVEMENT_PLAN.md          # 改进计划
+├── TEST_SPEC.md                        # 本规范
+├── unit/
+│   ├── CMakeLists.txt
+│   ├── fixtures/
+│   │   ├── D3D12TestFixture.h
+│   │   └── D3D12TestFixture.cpp
+│   ├── test_device.cpp
+│   ├── test_buffer.cpp
+│   └── ...
+└── integration/
+    ├── CMakeLists.txt
+    ├── main_minimal.cpp
+    ├── main_render.cpp
+    ├── run_integration_test.py
+    ├── compare_ppm.py
+    ├── GT.ppm
+    └── GT_minimal.ppm
+```
+
+---
+
+## 8. 规范更新记录
+
+| 版本 | 日期 | 变更 |
+|------|------|------|
+| 1.0 | 2026-03-20 | 初始版本 |
+
+---
+
+**规范版本**: 1.0  
+**最后更新**: 2026-03-20
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