import pytest

tests/README.md

@@ -0,0 +1,88 @@
+# 测试指南
+
+## 运行测试
+
+### 运行所有测试
+```bash
+pytest
+```
+
+### 运行特定测试文件
+```bash
+pytest tests/test_playlist_merge.py
+```
+
+### 运行特定测试类或函数
+```bash
+pytest tests/test_playlist_merge.py::TestPlaylistMergeLocalPriority
+pytest tests/test_playlist_merge.py::TestPlaylistMergeLocalPriority::test_merge_local_priority
+```
+
+### 运行特定参数化测试用例
+```bash
+# 只运行 case1 的测试
+pytest tests/test_playlist_merge.py -k "case_num-1"
+```
+
+### 查看详细输出
+```bash
+pytest -v  # verbose
+pytest -vv  # more verbose
+pytest -s  # 显示 print 输出
+```
+
+### 查看测试覆盖率
+```bash
+pip install pytest-cov
+pytest --cov=app --cov-report=html
+```
+然后在浏览器中打开 `htmlcov/index.html`
+
+## 测试结构
+
+- `test_playlist_merge.py` - 播放列表合并功能的单元测试
+- `conftest.py` - pytest fixtures 和配置
+- `pytest.ini` - pytest 配置文件
+
+## 编写新测试
+
+1. 在 `tests/` 目录下创建 `test_*.py` 文件
+2. 创建以 `Test` 开头的测试类
+3. 编写以 `test_` 开头的测试函数
+4. 使用 `assert` 进行断言
+5. 使用 `@pytest.mark.parametrize` 进行参数化测试
+
+示例:
+```python
+import pytest
+
+class TestMyFeature:
+    def test_basic_functionality(self):
+        result = my_function(input_data)
+        assert result == expected_output
+    
+    @pytest.mark.parametrize("input,expected", [
+        (1, 2),
+        (2, 4),
+        (3, 6),
+    ])
+    def test_with_multiple_inputs(self, input, expected):
+        assert my_function(input) == expected
+```
+
+## 调试测试
+
+### 在测试失败时进入调试器
+```bash
+pytest --pdb
+```
+
+### 只运行上次失败的测试
+```bash
+pytest --lf
+```
+
+### 先运行失败的测试
+```bash
+pytest --ff
+```