def test_from_path(self, mocker):
     match = object()
     get_new_command = object()
     load_source = mocker.patch(
         'thefuck.types.load_source',
         return_value=Mock(match=match,
                           get_new_command=get_new_command,
                           enabled_by_default=True,
                           priority=900,
                           requires_output=True))
     assert Rule.from_path(Path('/rules/bash.py')) \
            == Rule('bash', match, get_new_command, priority=900)
     load_source.assert_called_once_with('bash', '/rules/bash.py')

 def test_get_corrected_commands_with_rule_returns_command(self):
     rule = Rule(get_new_command=lambda x: x.script + '!',
                 priority=100)
     assert (list(rule.get_corrected_commands(Command(script='test')))
             == [CorrectedCommand(script='test!', priority=100)])

 def test_isnt_match_when_rule_failed(self, capsys):
     rule = Rule('test', Mock(side_effect=OSError('Denied')),
                 requires_output=False)
     assert not rule.is_match(Command('ls'))
     assert capsys.readouterr()[1].split('\n')[0] == '[WARN] Rule test:'

 def test_is_match(self):
     rule = Rule('', lambda x: x.script == 'cd ..')
     assert rule.is_match(Command('cd ..'))

 def test_get_corrected_commands_with_rule_returns_list(self):
     rule = Rule(get_new_command=lambda x: [x.script + '!', x.script + '@'],
                 priority=100)
     assert list(rule.get_corrected_commands(Command(script='test'))) \
            == [CorrectedCommand(script='test!', priority=100),
                CorrectedCommand(script='[email protected]', priority=200)]

 def test_get_corrected_commands_with_rule_returns_list(self):
     rule = Rule(get_new_command=lambda x: [x.script + "!", x.script + "@"], priority=100)
     assert list(rule.get_corrected_commands(Command(script="test"))) == [
         CorrectedCommand(script="test!", priority=100),
         CorrectedCommand(script="[email protected]", priority=200),
     ]

 def test_isnt_match_when_rule_failed(self, capsys):
     rule = Rule("test", Mock(side_effect=OSError("Denied")), requires_output=False)
     assert not rule.is_match(Command("ls"))
     assert capsys.readouterr()[1].split("\n")[0] == "[WARN] Rule test:"

 def test_is_match(self):
     rule = Rule("", lambda x: x.script == "cd ..")
     assert rule.is_match(Command("cd .."))