case.py 文件源码

def assertMultiLineEqual(self, first, second, msg=None):
        """Assert that two multi-line strings are equal."""
        self.assertIsInstance(first, six.string_types, (
                'First argument is not a string'))
        self.assertIsInstance(second, six.string_types, (
                'Second argument is not a string'))

        if first != second:
            # don't use difflib if the strings are too long
            if (len(first) > self._diffThreshold or
                len(second) > self._diffThreshold):
                self._baseAssertEqual(first, second, msg)
            firstlines = first.splitlines(True)
            secondlines = second.splitlines(True)
            if len(firstlines) == 1 and first.strip('\r\n') == first:
                firstlines = [first + '\n']
                secondlines = [second + '\n']
            standardMsg = '%s != %s' % _common_shorten_repr(first, second)
            diff = '\n' + ''.join(difflib.ndiff(firstlines, secondlines))
            standardMsg = self._truncateMessage(standardMsg, diff)
            self.fail(self._formatMessage(msg, standardMsg))