def add(self, elem, replace=False):
        """Add a requirement.

        :param elem: a string or :class:`Requirement` instance.
        :param replace: if `True`, packages in the set with the same name will
            be removed first.
        """
        if isinstance(elem, text_type):
            elem = Requirement.coerce(elem)
        if replace and elem in self:
            self.remove(elem)
        super(Requirements, self).add(elem)
def test_get_translation_language_codes_that_need_reviewers_for_one_lang(
            self):
        stats = suggestion_services.get_community_contribution_stats()
        stats.set_translation_suggestion_count_for_language_code(
            self.sample_language_code, 1)

        language_codes_that_need_reviewers = (
            stats.get_translation_language_codes_that_need_reviewers()
        )

        self.assertEqual(
            language_codes_that_need_reviewers, {self.sample_language_code})