case.py 文件源码

def assertItemsEqual(self, expected_seq, actual_seq, msg=None):
        """An unordered sequence specific comparison. It asserts that
        actual_seq and expected_seq have the same element counts.
        Equivalent to::

            self.assertEqual(Counter(iter(actual_seq)),
                             Counter(iter(expected_seq)))

        Asserts that each element has the same count in both sequences.
        Example:
            - [0, 1, 1] and [1, 0, 1] compare equal.
            - [0, 0, 1] and [0, 1] compare unequal.
        """
        first_seq, second_seq = list(actual_seq), list(expected_seq)
        with warnings.catch_warnings():
            if sys.py3kwarning:
                # Silence Py3k warning raised during the sorting
                for _msg in ["(code|dict|type) inequality comparisons",
                             "builtin_function_or_method order comparisons",
                             "comparing unequal types"]:
                    warnings.filterwarnings("ignore", _msg, DeprecationWarning)
            try:
                first = collections.Counter(first_seq)
                second = collections.Counter(second_seq)
            except TypeError:
                # Handle case with unhashable elements
                differences = _count_diff_all_purpose(first_seq, second_seq)
            else:
                if first == second:
                    return
                differences = _count_diff_hashable(first_seq, second_seq)

        if differences:
            standardMsg = 'Element counts were not equal:\n'
            lines = ['First has %d, Second has %d:  %r' % diff for diff in differences]
            diffMsg = '\n'.join(lines)
            standardMsg = self._truncateMessage(standardMsg, diffMsg)
            msg = self._formatMessage(msg, standardMsg)
            self.fail(msg)