Python Testing

Tools

doctest

• https://docs.python.org/3/library/doctest.html

doctest 就是在 Python source code 裡爬 docstring， docstring 包含 module 最一開始的匿名字串和 function 下最開始的匿名字串 (也就是 help 可以看到的)， 找出 docstring 裡面格式為 interactive Python sessions 的部份， 拿出來執行並檢查 output

• 利用測試來確保 docstrings 是 up-to-date 的
• regression testing

def f(x):
    '''
    >>> f(123)
    123
    '''
    return x

if __name__ == "__main__":
    import doctest
    doctest.testmod()

或是 command line 直接下 python -m doctest -v xxx.py

unittest (PyUnit)

• https://docs.python.org/3/library/unittest.html

• inspired by JUnit

• support

  • test automation
  • sharing of setup and shutdown code for tests
  • aggregation of tests into collections
  • independence of the tests from the reporting framework

command line 直接下 python -m unittest discover -v

nose

install : sudo pacman -S python-nose

nosetests --with-doctest -v

pytest

install : sudo pacman -S python-pytest

# pytest.ini
[pytest]
python_files=*.py

py.test --doctest-modules -v --strict