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"""Tests for the Manager object for FileCheckers."""
import errno
import mock
import pytest
from flake8 import checker
def style_guide_mock(**kwargs):
"""Create a mock StyleGuide object."""
kwargs.setdefault('diff', False)
kwargs.setdefault('jobs', '4')
style_guide = mock.Mock()
style_guide.options = mock.Mock(**kwargs)
return style_guide
def test_oserrors_cause_serial_fall_back():
"""Verify that OSErrors will cause the Manager to fallback to serial."""
err = OSError(errno.ENOSPC, 'Ominous message about spaceeeeee')
style_guide = style_guide_mock()
with mock.patch('multiprocessing.Queue', side_effect=err):
manager = checker.Manager(style_guide, [], [])
assert manager.using_multiprocessing is False
@mock.patch('flake8.utils.is_windows', return_value=False)
def test_oserrors_are_reraised(is_windows):
"""Verify that OSErrors will cause the Manager to fallback to serial."""
err = OSError(errno.EAGAIN, 'Ominous message')
style_guide = style_guide_mock()
with mock.patch('multiprocessing.Queue', side_effect=err):
with pytest.raises(OSError):
checker.Manager(style_guide, [], [])
def test_multiprocessing_is_disabled():
"""Verify not being able to import multiprocessing forces jobs to 0."""
style_guide = style_guide_mock()
with mock.patch('flake8.checker.multiprocessing', None):
manager = checker.Manager(style_guide, [], [])
assert manager.jobs == 0
def test_make_checkers():
"""Verify that we create a list of FileChecker instances."""
style_guide = style_guide_mock()
files = ['file1', 'file2']
checkplugins = mock.Mock()
checkplugins.to_dictionary.return_value = {
'ast_plugins': [],
'logical_line_plugins': [],
'physical_line_plugins': [],
}
with mock.patch('flake8.checker.multiprocessing', None):
manager = checker.Manager(style_guide, files, checkplugins)
with mock.patch('flake8.utils.filenames_from') as filenames_from:
filenames_from.side_effect = [['file1'], ['file2']]
with mock.patch('flake8.utils.fnmatch', return_value=True):
with mock.patch('flake8.processor.FileProcessor'):
manager.make_checkers()
for file_checker in manager.checkers:
assert file_checker.filename in files
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