test-generator

測試生成技能

描述

為指定的程式碼自動生成完整測試套件，包含靜態分析、單元測試、整合測試及覆蓋率報告。

觸發條件

• 「生成測試」、「寫測試」、「test this」
• 「建立單元測試」、「建立整合測試」
• 「靜態分析」、「type check」
• 「覆蓋率」、「coverage」

---

測試金字塔

        /\
       /  \      E2E Tests (少量)
      /----\
     /      \    Integration Tests (中等)
    /--------\
   /          \  Unit Tests (大量)
  /------------\
 / Static Analysis (基礎)

---

Python 測試策略

1️⃣ 靜態分析 (Static Analysis)

工具配置

工具	用途	配置檔
mypy	類型檢查	pyproject.toml / mypy.ini
ruff	Linting + Formatting (取代 pylint/flake8/black)	pyproject.toml
bandit	安全性掃描	.bandit

mypy 配置範例

# pyproject.toml
[tool.mypy]
python_version = "3.11"
strict = true
warn_return_any = true
warn_unused_ignores = true
disallow_untyped_defs = true
disallow_incomplete_defs = true
check_untyped_defs = true
no_implicit_optional = true

[[tool.mypy.overrides]]
module = ["tests.*"]
disallow_untyped_defs = false

ruff 配置範例

# pyproject.toml
[tool.ruff]
target-version = "py311"
line-length = 88
select = [
    "E",   # pycodestyle errors
    "W",   # pycodestyle warnings
    "F",   # pyflakes
    "I",   # isort
    "B",   # flake8-bugbear
    "C4",  # flake8-comprehensions
    "UP",  # pyupgrade
    "ARG", # flake8-unused-arguments
    "SIM", # flake8-simplify
]
ignore = ["E501"]  # line too long (handled by formatter)

[tool.ruff.isort]
known-first-party = ["src"]

2️⃣ 單元測試 (Unit Tests)

pytest 配置

# pyproject.toml
[tool.pytest.ini_options]
testpaths = ["tests"]
python_files = ["test_*.py", "*_test.py"]
python_functions = ["test_*"]
addopts = [
    "-v",
    "--strict-markers",
    "--tb=short",
    "-ra",
]
markers = [
    "unit: Unit tests",
    "integration: Integration tests",
    "slow: Slow running tests",
]
filterwarnings = [
    "error",
    "ignore::DeprecationWarning",
]

測試結構

tests/
├── __init__.py
├── conftest.py           # 共用 fixtures
├── unit/                 # 單元測試
│   ├── __init__.py
│   ├── conftest.py
│   ├── test_domain/      # Domain 層測試
│   ├── test_application/ # Application 層測試
│   └── test_utils/
├── integration/          # 整合測試
│   ├── __init__.py
│   ├── conftest.py
│   ├── test_api/
│   ├── test_database/
│   └── test_external/
└── e2e/                  # 端對端測試
    └── ...