mirror of
https://github.com/PyCQA/flake8.git
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116 lines
4.4 KiB
Python
116 lines
4.4 KiB
Python
from __future__ import with_statement
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import unittest
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try:
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from unittest import mock
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except ImportError:
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import mock # < PY33
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from flake8 import engine, util, __version__, reporter
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class TestEngine(unittest.TestCase):
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def setUp(self):
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self.patches = {}
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def tearDown(self):
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assert len(self.patches.items()) == 0
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def start_patch(self, patch):
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self.patches[patch] = mock.patch(patch)
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return self.patches[patch].start()
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def stop_patches(self):
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patches = self.patches.copy()
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for k, v in patches.items():
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v.stop()
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del(self.patches[k])
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def test_get_style_guide(self):
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with mock.patch('flake8.engine._register_extensions') as reg_ext:
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reg_ext.return_value = ([], [], [], [])
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g = engine.get_style_guide()
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self.assertTrue(isinstance(g, engine.StyleGuide))
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reg_ext.assert_called_once_with()
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def test_get_style_guide_kwargs(self):
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m = mock.Mock()
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with mock.patch('flake8.engine.StyleGuide') as StyleGuide:
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with mock.patch('flake8.engine.get_parser') as get_parser:
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m.ignored_extensions = []
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StyleGuide.return_value.options.jobs = '42'
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StyleGuide.return_value.options.diff = False
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get_parser.return_value = (m, [])
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engine.get_style_guide(foo='bar')
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get_parser.assert_called_once_with()
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StyleGuide.assert_called_once_with(**{'parser': m, 'foo': 'bar'})
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def test_register_extensions(self):
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with mock.patch('pep8.register_check') as register_check:
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registered_exts = engine._register_extensions()
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self.assertTrue(isinstance(registered_exts[0], util.OrderedSet))
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self.assertTrue(len(registered_exts[0]) > 0)
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for i in registered_exts[1:]:
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self.assertTrue(isinstance(i, list))
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self.assertTrue(register_check.called)
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def test_get_parser(self):
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# setup
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re = self.start_patch('flake8.engine._register_extensions')
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gpv = self.start_patch('flake8.engine.get_python_version')
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pgp = self.start_patch('pep8.get_parser')
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m = mock.Mock()
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re.return_value = ([('pyflakes', '0.7'), ('mccabe', '0.2')], [], [],
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[])
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gpv.return_value = 'Python Version'
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pgp.return_value = m
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# actual call we're testing
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parser, hooks = engine.get_parser()
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# assertions
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self.assertTrue(re.called)
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self.assertTrue(gpv.called)
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pgp.assert_called_once_with(
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'flake8',
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'%s (pyflakes: 0.7, mccabe: 0.2) Python Version' % __version__)
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self.assertTrue(m.remove_option.called)
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self.assertTrue(m.add_option.called)
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self.assertEqual(parser, m)
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self.assertEqual(hooks, [])
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# clean-up
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self.stop_patches()
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def test_get_python_version(self):
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self.assertTrue('on' in engine.get_python_version())
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# Silly test but it will provide 100% test coverage
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# Also we can never be sure (without reconstructing the string
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# ourselves) what system we may be testing on.
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def test_windows_disables_jobs(self):
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with mock.patch('flake8.util.is_windows') as is_windows:
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is_windows.return_value = True
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guide = engine.get_style_guide()
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assert isinstance(guide, reporter.BaseQReport) is False
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def test_stdin_disables_jobs(self):
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with mock.patch('flake8.util.is_using_stdin') as is_using_stdin:
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is_using_stdin.return_value = True
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guide = engine.get_style_guide()
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assert isinstance(guide, reporter.BaseQReport) is False
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def test_disables_extensions_that_are_not_selected(self):
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with mock.patch('flake8.engine._register_extensions') as re:
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re.return_value = ([('fake_ext', '0.1a1')], [], [], ['X'])
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sg = engine.get_style_guide()
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assert 'X' in sg.options.ignore
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def test_enables_off_by_default_extensions(self):
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with mock.patch('flake8.engine._register_extensions') as re:
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re.return_value = ([('fake_ext', '0.1a1')], [], [], ['X'])
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parser, options = engine.get_parser()
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parser.parse_args(['--select=X'])
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sg = engine.StyleGuide(parser=parser)
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assert 'X' not in sg.options.ignore
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if __name__ == '__main__':
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unittest.main()
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