pytest-mark-no-py3

This package provides a pytest plugin and a Bowler codemod to help migrate tests to Python 3.

Any tests marked with @pytest.mark.no_py3 will be expected to fail when running on Python 3 and will fail the test if they pass unexpectedly.

Usage

Adding @pytest.mark.no_py3

1. Install this package in your test dependencies.

2. Run your tests on Python 3, savings the results with pytest's --result-log option, e.g.:

   tox -e py37 -- --result-log=test-results.txt
   

3. Install this package with the bowler extras in a Python 3 virtualenv:

   pip install pytest_mark_no_py3[bowler]
   

4. Apply the marker to all of the tests that failed on Python 3, running from the same directory that you ran the tests from:

   python -m pytest_mark_no_py3.add --result-log=path/to/result-log.txt path/to/your/tests
   

   If you're feeling confident, you can also use the --no-interactive option to apply the codemod without prompting to accept changes.

Removing @pytest.mark.no_py3

1. Fix some code so that tests start passing on Python 3, violating the xfail.

2. Run your tests on Python 3, savings the results with pytest's --result-log option, e.g.:

   tox -e py37 -- --result-log=test-results.txt
   

   Warning: The only failing tests should be the tests that you fixed and want the marker removed from!

3. Install this package with the bowler extras in a Python 3 virtualenv:

   pip install pytest_mark_no_py3[bowler]
   

4. Remove the marker from all of the tests that "failed" (i.e. were expected to fail but actually passed) on Python 3, running from the same directory that you ran the tests from:

   python -m pytest_mark_no_py3.remove --result-log=path/to/result-log.txt path/to/your/tests
   

   If you're feeling confident, you can also use the --no-interactive option to apply the codemod without prompting to accept changes.

Running tests

Run tox.