Before:
  Save g:ale_warn_about_trailing_whitespace

  let g:ale_warn_about_trailing_whitespace = 1

  runtime ale_linters/python/pylama.vim

After:
  Restore

  call ale#linter#Reset()

  silent file something_else.py

Execute(The pylama handler should handle no messages with version older than 8.1.4):
  AssertEqual [], ale_linters#python#pylama#Handle(bufnr(''), [8, 0, 5], [])

Execute(The pylama handler should handle no messages with version newer or equal than 8.1.4):
  AssertEqual [], ale_linters#python#pylama#Handle(bufnr(''), [8, 2, 0], [])

Execute(The pylama handler should handle basic warnings and syntax errors with version older than 8.1.4):
  AssertEqual
  \ [
  \   {
  \     'lnum': 8,
  \     'col': 1,
  \     'code': 'W0611',
  \     'type': 'W',
  \     'sub_type': '',
  \     'text': '''foo'' imported but unused [pyflakes]',
  \   },
  \   {
  \     'lnum': 8,
  \     'col': 0,
  \     'code': 'E0401',
  \     'type': 'E',
  \     'sub_type': '',
  \     'text': 'Unable to import ''foo'' [pylint]',
  \   },
  \   {
  \     'lnum': 10,
  \     'col': 1,
  \     'code': 'E302',
  \     'type': 'E',
  \     'sub_type': '',
  \     'text': 'expected 2 blank lines, found 1 [pycodestyle]',
  \   },
  \   {
  \     'lnum': 11,
  \     'col': 1,
  \     'code': 'D401',
  \     'type': 'W',
  \     'sub_type': 'style',
  \     'text': 'First line should be in imperative mood (''Get'', not ''Gets'') [pydocstyle]',
  \   },
  \   {
  \     'lnum': 15,
  \     'col': 81,
  \     'code': 'E501',
  \     'type': 'E',
  \     'sub_type': '',
  \     'text': 'line too long (96 > 80 characters) [pycodestyle]',
  \   },
  \   {
  \     'lnum': 16,
  \     'col': 1,
  \     'code': 'D203',
  \     'type': 'W',
  \     'sub_type': 'style',
  \     'text': '1 blank line required before class docstring (found 0) [pydocstyle]',
  \   },
  \   {
  \     'lnum': 18,
  \     'col': 1,
  \     'code': 'D107',
  \     'type': 'W',
  \     'sub_type': 'style',
  \     'text': 'Missing docstring in __init__ [pydocstyle]',
  \   },
  \   {
  \     'lnum': 20,
  \     'col': 0,
  \     'code': 'C4001',
  \     'type': 'W',
  \     'sub_type': 'style',
  \     'text': 'Invalid string quote ", should be '' [pylint]',
  \   },
  \ ],
  \ ale_linters#python#pylama#Handle(bufnr(''), [8, 0, 5], [
  \   'No config file found, using default configuration',
  \   'index.py:8:1: W0611 ''foo'' imported but unused [pyflakes]',
  \   'index.py:8:0: E0401 Unable to import ''foo'' [pylint]',
  \   'index.py:10:1: E302 expected 2 blank lines, found 1 [pycodestyle]',
  \   'index.py:11:1: D401 First line should be in imperative mood (''Get'', not ''Gets'') [pydocstyle]',
  \   'index.py:15:81: E501 line too long (96 > 80 characters) [pycodestyle]',
  \   'index.py:16:1: D203 1 blank line required before class docstring (found 0) [pydocstyle]',
  \   'index.py:18:1: D107 Missing docstring in __init__ [pydocstyle]',
  \   'index.py:20:0: C4001 Invalid string quote ", should be '' [pylint]',
  \ ])

Execute(The pylama handler should handle basic warnings and syntax errors with version newer than 8.1.4):
  AssertEqual
  \ [
  \   {
  \     'lnum': 8,
  \     'col': 1,
  \     'code': 'W0611',
  \     'type': 'W',
  \     'sub_type': '',
  \     'text': '''foo'' imported but unused [pyflakes]',
  \   },
  \   {
  \     'lnum': 8,
  \     'col': 0,
  \     'code': 'E0401',
  \     'type': 'E',
  \     'sub_type': '',
  \     'text': 'Unable to import ''foo'' [pylint]',
  \   },
  \   {
  \     'lnum': 10,
  \     'col': 1,
  \     'code': 'E302',
  \     'type': 'E',
  \     'sub_type': '',
  \     'text': 'expected 2 blank lines, found 1 [pycodestyle]',
  \   },
  \   {
  \     'lnum': 11,
  \     'col': 1,
  \     'code': 'D401',
  \     'type': 'W',
  \     'sub_type': 'style',
  \     'text': 'First line should be in imperative mood (''Get'', not ''Gets'') [pydocstyle]',
  \   },
  \   {
  \     'lnum': 15,
  \     'col': 81,
  \     'code': 'E501',
  \     'type': 'E',
  \     'sub_type': '',
  \     'text': 'line too long (96 > 80 characters) [pycodestyle]',
  \   },
  \   {
  \     'lnum': 16,
  \     'col': 1,
  \     'code': 'D203',
  \     'type': 'W',
  \     'sub_type': 'style',
  \     'text': '1 blank line required before class docstring (found 0) [pydocstyle]',
  \   },
  \   {
  \     'lnum': 18,
  \     'col': 1,
  \     'code': 'D107',
  \     'type': 'W',
  \     'sub_type': 'style',
  \     'text': 'Missing docstring in __init__ [pydocstyle]',
  \   },
  \   {
  \     'lnum': 20,
  \     'col': 0,
  \     'code': 'C4001',
  \     'type': 'W',
  \     'sub_type': 'style',
  \     'text': 'Invalid string quote ", should be '' [pylint]',
  \   },
  \ ],
  \ ale_linters#python#pylama#Handle(bufnr(''), [8, 2, 0], [
  \ '[{"source":"pyflakes","col":1,"lnum":8,"etype":"W","message":"''foo'' imported but unused","filename":"index.py","number":"W0611"},{"source":"pylint","col":0,"lnum":8,"etype":"E","message":"Unable to import ''foo''","filename":"index.py","number":"E0401"},{"source":"pycodestyle","col":1,"lnum":10,"etype":"E","message":"expected 2 blank lines, found 1","filename":"index.py","number":"E302"},{"source":"pydocstyle","col":1,"lnum":11,"etype":"D","message":"First line should be in imperative mood (''Get'', not ''Gets'')","filename":"index.py","number":"D401"},{"source":"pycodestyle","col":81,"lnum":15,"etype":"E","message":"line too long (96 > 80 characters)","filename":"index.py","number":"E501"},{"source":"pydocstyle","col":1,"lnum":16,"etype":"D","message":"1 blank line required before class docstring (found 0)","filename":"index.py","number":"D203"},{"source":"pydocstyle","col":1,"lnum":18,"etype":"D","message":"Missing docstring in __init__","filename":"index.py","number":"D107"},{"source":"pylint","col":0,"lnum":20,"etype":"C","message":"Invalid string quote \", should be ''","filename":"index.py","number":"C4001"}]',
  \ ])

Execute(The pylama handler should handle tracebacks with parsable messages with version older than 8.1.4):
  AssertEqual
  \ [
  \   {
  \     'lnum': 1,
  \     'text': 'ParseError: Cannot parse file. (See :ALEDetail)',
  \     'detail': join([
  \       'Traceback (most recent call last):',
  \       '  File "/usr/local/lib/python2.7/site-packages/pylama/core.py", line 66, in run',
  \       '    path, code=code, ignore=ignore, select=select, params=lparams)',
  \       '  File "/usr/local/lib/python2.7/site-packages/pylama/lint/pylama_pydocstyle.py", line 37, in run',
  \       '    } for e in PyDocChecker().check_source(*check_source_args)]',
  \       '  File "/usr/local/lib/python2.7/site-packages/pydocstyle/checker.py", line 64, in check_source',
  \       '    module = parse(StringIO(source), filename)',
  \       '  File "/usr/local/lib/python2.7/site-packages/pydocstyle/parser.py", line 340, in __call__',
  \       '    return self.parse(*args, **kwargs)',
  \       '  File "/usr/local/lib/python2.7/site-packages/pydocstyle/parser.py", line 328, in parse',
  \       '    six.raise_from(ParseError(), error)',
  \       '  File "/usr/local/lib/python2.7/site-packages/six.py", line 737, in raise_from',
  \       '    raise value',
  \       'ParseError: Cannot parse file.',
  \     ], "\n"),
  \   },
  \   {
  \     'lnum': 11,
  \     'col': 1,
  \     'code': 'E302',
  \     'type': 'E',
  \     'sub_type': '',
  \     'text': 'expected 2 blank lines, found 1 [pycodestyle]',
  \   },
  \   {
  \     'lnum': 16,
  \     'col': 81,
  \     'code': 'E501',
  \     'type': 'E',
  \     'sub_type': '',
  \     'text': 'line too long (96 > 80 characters) [pycodestyle]',
  \   },
  \ ],
  \ ale_linters#python#pylama#Handle(bufnr(''), [8, 0, 5], [
  \   'Traceback (most recent call last):',
  \   '  File "/usr/local/lib/python2.7/site-packages/pylama/core.py", line 66, in run',
  \   '    path, code=code, ignore=ignore, select=select, params=lparams)',
  \   '  File "/usr/local/lib/python2.7/site-packages/pylama/lint/pylama_pydocstyle.py", line 37, in run',
  \   '    } for e in PyDocChecker().check_source(*check_source_args)]',
  \   '  File "/usr/local/lib/python2.7/site-packages/pydocstyle/checker.py", line 64, in check_source',
  \   '    module = parse(StringIO(source), filename)',
  \   '  File "/usr/local/lib/python2.7/site-packages/pydocstyle/parser.py", line 340, in __call__',
  \   '    return self.parse(*args, **kwargs)',
  \   '  File "/usr/local/lib/python2.7/site-packages/pydocstyle/parser.py", line 328, in parse',
  \   '    six.raise_from(ParseError(), error)',
  \   '  File "/usr/local/lib/python2.7/site-packages/six.py", line 737, in raise_from',
  \   '    raise value',
  \   'ParseError: Cannot parse file.',
  \   '',
  \   'index.py:11:1: E302 expected 2 blank lines, found 1 [pycodestyle]',
  \   'index.py:16:81: E501 line too long (96 > 80 characters) [pycodestyle]',
  \ ])

" Note: This is probably a bug, since all pylama plugins produce codes, but
" should be handled for compatibility.
" Note: The pylama isort plugin is distributed in the isort package.
Execute(The pylama handler should handle messages without codes with version older than 8.1.4):
  AssertEqual
  \ [
  \   {
  \     'lnum': 0,
  \     'col': 0,
  \     'code': '',
  \     'type': 'W',
  \     'sub_type': '',
  \     'text': 'Incorrectly sorted imports. [isort]'
  \   },
  \ ],
  \ ale_linters#python#pylama#Handle(bufnr(''), [8, 0, 5], [
  \   'index.py:0:0: Incorrectly sorted imports. [isort]',
  \ ])

" Note: This is a pylama bug, but should be handled for compatibility.
" See https://github.com/klen/pylama/pull/146
Execute(The pylama handler should handle message codes followed by a colon with version older than 8.1.4):
  AssertEqual
  \ [
  \   {
  \     'lnum': 31,
  \     'col': 1,
  \     'code': 'E800',
  \     'type': 'E',
  \     'sub_type': '',
  \     'text': 'Found commented out code: # needs_sphinx = ''1.0'' [eradicate]',
  \   },
  \ ],
  \ ale_linters#python#pylama#Handle(bufnr(''), [8, 0, 5], [
  \   'index.py:31:1: E800: Found commented out code: # needs_sphinx = ''1.0'' [eradicate]',
  \ ])