Hey folks, I need some help here, there is an error happening on the tests but I couldn't figure out how to solve it.

Any help here is very welcome!

@lieryan wanna help here?

I was looking into this, and I think I found the issue.

On current develop, when running pylama, the pylama options looks like this:

Namespace(
    ...
    linters=[
        ('pyflakes', <pylama.lint.pylama_pyflakes.Linter object at 0x7f088d4120b0>),
        ('pep8', <pylama.lint.pylama_pycodestyle.Linter object at 0x7f088d412890>),
        ('mccabe', <pylama.lint.pylama_mccabe.Linter object at 0x7f088d412410>),
    ],
    ...
)

but using the updated version in the PR, the options looks like this:

Namespace(
    ...
    linters=[
        'pyflakes',
        'mccabe',
    ],
    ...
)

the format of how this options has been parsed has changed a bit, but that is not the issue. The issue is that linters list no longer have pep8 in the list of enabled linters. A little bit of research shows that it seems that pep8 has long been renamed to pycodestyle, but pylama continues to accept pep8 name for a while. Some time during pylama 7.7.1 and 8.4.1, the compatibility code that had allowed using pep8 name in pylama has finally been removed and that breaks the test, as now pycodestyle/pep8 linters are no longer running.

A quick fix for the test is to do something like:

diff --git a/pymode/lint.py b/pymode/lint.py
index c530404..56208a6 100644
--- a/pymode/lint.py
+++ b/pymode/lint.py
@@ -42,6 +42,10 @@ def code_check():
             raise ValueError('g:pymode_lint_select should have a list type')
         else:
             select = env.var('g:pymode_lint_select')
+        if 'pep8' in linters:
+            ## maybe add user-visible deprecation warning here
+            linters.remove('pep8')
+            linters.append('pycodestyle')
         options = parse_options(
             linters=linters, force=1,
             ignore=ignore,

this would make the test passes, but it would break the g:pymode_lint_options_pep8 config options, we should rename this option to g:pymode_lint_options_pycodestyle so there are a number of other places that needs to be fixed as well.