pytest-flake8dir 2.2.0

flake8dir.make_py_files(**kwargs: Mapping[str, str])

Creates one python file for each passed keyword argument, with name corresponding to the keyword argument + ‘.py’, and content according the string value of the argument. The value will be processed with textwrap.dedent() so mixed indentation is not a problem in your test files.

For example, this creates two python files in the temporary directory, called example1.py and example2.py, each containing one line with an assignment:

def test_sample(flake8dir):
    flake8dir.make_py_files(
        example1='''
            x = 1
        ''',
        example2='''
            y = 1
        '''
    )

flake8dir.make_example_py(content: str)

A shortcut for make_py_files(example=content), for when you are using a single file over and over. This creates just example.py, which is often all you need for testing a rule.

For example:

def test_sample(flake8dir):
    flake8dir.make_example_py('''
        x = 1
    ''')

flake8dir.make_setup_cfg(contents: str)

Makes the file setup.cfg in the test directory with contents equal to the string passed in. This is again processed with textwrap.dedent() so indentation is not a worry. You’ll probably want to set the [flake8] section header to configure flake8.

For example, this makes flake8 ignore rule E101:

def test_sample(flake8dir):
    flake8dir.make_setup_cfg('''
        [flake8]
        ignore = E101
    ''')

flake8dir.make_file(filename: str, content: str)

Make an arbitrary file with the given filename - this function is the inner implementation for make_py_files and make_setup_cfg. filename may include directories, like mydir/foo.py, and they will be created. content is subject to the same textwrap.dedent() processing as mentioned above.

For example:

def test_sample(flake8dir):
    flake8dir.make_file('myfile/foo.py', '''
        x = 1
    ''')

flake8dir.run_flake8(extra_args: List[str]=None) -> Flake8Result

Runs flake8 in the current process, and returns a Flake8Result representing the results.

extra_args may be a list of extra flags to pass to flake8, for example passing ['--ignore', 'E101'] would achieve the same thing as the above setup.cfg example. Note some arguments are already passed to ensure it runs in the same process without multiprocessing - see source.

Flake8Result.out: str

The full string of output generated by flake8.

Flake8Result.exit_code: int

The exit code that the flake8 run exited with.

Flake8Result.out_lines: List[str]

A list of individual lines of output, without trailing newlines. This is the most useful tool for making assertions against.

For example, given a result you can check for a particular line being output:

result = flake8dir.run_flake8()
expected = './example.py:1:2: E221 multiple spaces before operator'
assert expected in result.out_lines