pytest-subtests

=============== pytest-subtests

unittest subTest() support and subtests fixture.

.. image:: https://img.shields.io/pypi/v/pytest-subtests.svg :target: https://pypi.org/project/pytest-subtests :alt: PyPI version

.. image:: https://img.shields.io/conda/vn/conda-forge/pytest-subtests.svg :target: https://anaconda.org/conda-forge/pytest-subtests

.. image:: https://img.shields.io/pypi/pyversions/pytest-subtests.svg :target: https://pypi.org/project/pytest-subtests :alt: Python versions

.. image:: https://github.com/pytest-dev/pytest-subtests/workflows/test/badge.svg :target: https://github.com/pytest-dev/pytest-subtests/actions

.. image:: https://img.shields.io/badge/code%20style-black-000000.svg :target: https://github.com/ambv/black

---

This pytest_ plugin was generated with Cookiecutter_ along with @hackebrot's cookiecutter-pytest-plugin template.

Features

• Adds support for TestCase.subTest <https://docs.python.org/3/library/unittest.html#distinguishing-test-iterations-using-subtests>__.

• New subtests fixture, providing similar functionality for pure pytest tests.

Installation

You can install pytest-subtests via pip_ from PyPI_::

$ pip install pytest-subtests

Usage

unittest subTest() example ^^^^^^^^^^^^^^^^^^^^^^^^^^

.. code-block:: python

import unittest


class T(unittest.TestCase):
    def test_foo(self):
        for i in range(5):
            with self.subTest("custom message", i=i):
                self.assertEqual(i % 2, 0)


if __name__ == "__main__":
    unittest.main()

Output

.. code-block::

λ pytest .tmp\test-unit-subtest.py
======================== test session starts ========================
...
collected 1 item

.tmp\test-unit-subtest.py FF.                                  [100%]

============================= FAILURES ==============================
_________________ T.test_foo [custom message] (i=1) _________________

self = <test-unit-subtest.T testMethod=test_foo>

    def test_foo(self):
        for i in range(5):
            with self.subTest('custom message', i=i):
>               self.assertEqual(i % 2, 0)
E               AssertionError: 1 != 0

.tmp\test-unit-subtest.py:9: AssertionError
_________________ T.test_foo [custom message] (i=3) _________________

self = <test-unit-subtest.T testMethod=test_foo>

    def test_foo(self):
        for i in range(5):
            with self.subTest('custom message', i=i):
>               self.assertEqual(i % 2, 0)
E               AssertionError: 1 != 0

.tmp\test-unit-subtest.py:9: AssertionError
================ 2 failed, 1 passed in 0.07 seconds =================

subtests fixture example ^^^^^^^^^^^^^^^^^^^^^^^^^^^^

.. code-block:: python

def test(subtests):
    for i in range(5):
        with subtests.test(msg="custom message", i=i):
            assert i % 2 == 0

Output

.. code-block::

λ pytest .tmp\test-subtest.py
======================== test session starts ========================
...
collected 1 item

.tmp\test-subtest.py .F.F..                                    [100%]

============================= FAILURES ==============================
____________________ test [custom message] (i=1) ____________________

    def test(subtests):
        for i in range(5):
            with subtests.test(msg='custom message', i=i):
>               assert i % 2 == 0
E               assert (1 % 2) == 0

.tmp\test-subtest.py:4: AssertionError
____________________ test [custom message] (i=3) ____________________

    def test(subtests):
        for i in range(5):
            with subtests.test(msg='custom message', i=i):
>               assert i % 2 == 0
E               assert (3 % 2) == 0

.tmp\test-subtest.py:4: AssertionError
================ 2 failed, 1 passed in 0.07 seconds =================

Contributing

Contributions are very welcome. Tests can be run with tox_:

.. code-block::

tox -e py37

License

Distributed under the terms of the MIT_ license, "pytest-subtests" is free and open source software

Issues

If you encounter any problems, please file an issue_ along with a detailed description.

.. _Cookiecutter: https://github.com/audreyr/cookiecutter .. _@hackebrot: https://github.com/hackebrot .. _MIT: http://opensource.org/licenses/MIT .. _cookiecutter-pytest-plugin: https://github.com/pytest-dev/cookiecutter-pytest-plugin .. _file an issue: https://github.com/pytest-dev/pytest-subtests/issues .. _pytest: https://github.com/pytest-dev/pytest .. _tox: https://tox.readthedocs.io/en/latest/ .. _pip: https://pypi.org/project/pip/ .. _PyPI: https://pypi.org/project/pytest-subtests/