Python pytest 测试框架最佳实践指南 - 固件、参数化、模拟与异常测试
python-pytest-ops by 0xdarkmatter/claude-mods
安装命令
npx skills add https://github.com/0xdarkmatter/claude-mods --skill python-pytest-ops🇨🇳中文介绍
Python pytest 模式
现代 pytest 模式，用于高效测试。
基础测试结构
import pytest
def test_basic():
"""简单断言测试。"""
assert 1 + 1 == 2
def test_with_description():
"""描述性名称和文档字符串。"""
result = calculate_total([1, 2, 3])
assert result == 6, "总和应等于 6"
固件
import pytest
@pytest.fixture
def sample_user():
"""创建测试用户。"""
return {"id": 1, "name": "Test User"}
@pytest.fixture
def db_connection():
"""带有设置和清理的固件。"""
conn = create_connection()
yield conn
conn.close()
def test_user(sample_user):
"""通过名称注入的固件。"""
assert sample_user["name"] == "Test User"
固件作用域
@pytest.fixture(scope="function") # 默认 - 每个测试
@pytest.fixture(scope="class") # 每个测试类
@pytest.fixture(scope="module") # 每个测试文件
@pytest.fixture(scope="session") # 整个测试运行
参数化
@pytest.mark.parametrize("input,expected", [
(1, 2),
(2, 4),
(3, 6),
])
def test_double(input, expected):
assert double(input) == expected
# 多参数
@pytest.mark.parametrize("x", [1, 2])
@pytest.mark.parametrize("y", [10, 20])
def test_multiply(x, y): # 4 种测试组合
assert x * y > 0
🇺🇸English
Python pytest Patterns
Modern pytest patterns for effective testing.
Basic Test Structure
import pytest
def test_basic():
"""Simple assertion test."""
assert 1 + 1 == 2
def test_with_description():
"""Descriptive name and docstring."""
result = calculate_total([1, 2, 3])
assert result == 6, "Sum should equal 6"
Fixtures
import pytest
@pytest.fixture
def sample_user():
"""Create test user."""
return {"id": 1, "name": "Test User"}
@pytest.fixture
def db_connection():
"""Fixture with setup and teardown."""
conn = create_connection()
yield conn
conn.close()
def test_user(sample_user):
"""Fixtures injected by name."""
assert sample_user["name"] == "Test User"
Fixture Scopes
@pytest.fixture(scope="function") # Default - per test
@pytest.fixture(scope="class") # Per test class
@pytest.fixture(scope="module") # Per test file
@pytest.fixture(scope="session") # Entire test run
Parametrize
@pytest.mark.parametrize("input,expected", [
(1, 2),
(2, 4),
(3, 6),
])
def test_double(input, expected):
assert double(input) == expected
# Multiple parameters
@pytest.mark.parametrize("x", [1, 2])
@pytest.mark.parametrize("y", [10, 20])
def test_multiply(x, y): # 4 test combinations
assert x * y > 0
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