Method assertCountEqual

Lib/unittest/case.py:1231–1261

Asserts that two iterables have the same elements, the same number of times, without regard to order. self.assertEqual(Counter(list(first)), Counter(list(second))) Example: - [0, 1, 1] and [1, 0, 1] compare equal. -

(self, first, second, msg=None)

            self.fail(self._formatMessage(msg, standardMsg))

    def assertCountEqual(self, first, second, msg=None):
        """Asserts that two iterables have the same elements, the same number of
        times, without regard to order.

            self.assertEqual(Counter(list(first)),
                             Counter(list(second)))

         Example:
            - [0, 1, 1] and [1, 0, 1] compare equal.
            - [0, 0, 1] and [0, 1] compare unequal.

        """
        first_seq, second_seq = list(first), list(second)
        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)

    def assertMultiLineEqual(self, first, second, msg=None):
        """Assert that two multi-line strings are equal."""