__init__.py 文件源码

def runTest(self):
        """Makes a simple test of the output"""

        body = ast.parse(self.candidate_code, self.file_name, 'exec')
        code = compile(self.candidate_code, self.file_name, 'exec')

        format_nodes = [
            node
            for node in ast.walk(body)
            if isinstance(node, ast.Attribute) and
            node.attr == 'format' and
            isinstance(node.value, ast.Str) and
            '{}' in node.value.s
        ]

        self.assertGreater(
            len(format_nodes),
            0,
            "It should have at one format call with curly braces {}"
            )

        exec(code)
        self.assertMultiLineEqual('Talk is cheap. Show me the code.\n',
                                  self.__mockstdout.getvalue(),
                                  'Output is not correct')