test_metadata.py 文件源码

def assert_startswith_diff(self, received, prefix):
        if not received.startswith(prefix):
            prefix_lines = prefix.split('\n')
            diff_string = '\n'.join(difflib.unified_diff(prefix_lines,
                                                         received.split('\n')[:len(prefix_lines)],
                                                         'EXPECTED', 'RECEIVED',
                                                         lineterm=''))
            self.fail(diff_string)