See:
https://pycodestyle.pycqa.org/en/latest/intro.html#error-codes
> In the default configuration, the checks E121, E123, E126, E133, E226,
> E241, E242, E704, W503, W504 and W505 are ignored because they are not
> rules unanimously accepted, and PEP 8 does not enforce them.
The pytest-runner package is deprecated and its use is discouraged. See:
https://github.com/pytest-dev/pytest-runner/
> pytest-runner depends on deprecated features of setuptools and relies
> on features that break security mechanisms in pip. For example
> 'setup_requires' and 'tests_require' bypass pip --require-hashes. See
> also https://github.com/pypa/setuptools/issues/1684.
>
> It is recommended that you:
>
> - Remove 'pytest-runner' from your 'setup_requires', preferably
> removing the setup_requires option.
> - Remove 'pytest' and any other testing requirements from
> 'tests_require', preferably removing the setup_requires option.
> - Select a tool to bootstrap and then run tests such as tox
Running tests should go through the tox entrypoint.
Similar to the recent adoption of Black. isort is a Python utility to
sort imports alphabetically and automatically separate into sections. By
using isort, contributors can quickly and automatically conform to the
projects style without thinking. Just let the tool do it.
Uses the configuration recommended by the Black to avoid conflicts of
style.
Rewrite TestImageQt.test_deprecated to no rely on import order.
The previous test configuration made it difficult to run a single test
with the pytest CLI. There were two major issues:
- The Tests directory was not a package. It now includes a __init__.py
file and imports from other tests modules are done with relative
imports.
- setup.cfg always specified the Tests directory. So even if a specific
test were specified as a CLI arg, this configuration would also always
include all tests. This configuration has been removed to allow
specifying a single test on the command line.
Contributors can now run specific tests with a single command such as:
$ tox -e py37 -- Tests/test_file_pdf.py::TestFilePdf.test_rgb
This makes it easy and faster to iterate on a single test failure and is
very familiar to those that have previously used tox and pytest.
When running tox or pytest with no arguments, they still discover and
runs all tests in the Tests directory.
