gistfile1.txt

    def test_validate_expanduser(self, os_path):
        """Test if validate expands the user correctly."""
        # os_path.expandvars.side_effect = lambda x: x.replace('$BAR',
        #                                                      '/home/foo/bar')
        os_path.expandvars = os.path.expandvars
        os_path.expanduser.side_effect = lambda x: x.replace('~', '/home/foo')
        os_path.isdir.side_effect = lambda path: path == '/home/foo/foobar'
        os_path.isabs.return_value = True
        with helpers.environ_set_temp('FOO', 'foo'):
            self.t.validate('~/foobar')
            os_path.expanduser.assert_called_once_with('~/foobar')