Method do_test_remove_with_mutate_root

Lib/test/test_xml_etree.py:2954–2983

(self, *, raises)

        self.do_test_remove_with_mutate_root(raises=False)

    def do_test_remove_with_mutate_root(self, *, raises):
        E = ET.Element

        class Z(E):
            def __eq__(self, o):
                del root[0]
                return not raises

        if raises:
            get_checker_context = lambda: self.assertRaises(ValueError)
        else:
            get_checker_context = nullcontext

        # test removing R() from [U(), V()]
        cases = self.cases_for_remove_missing_with_mutations(E, Z)
        for R, U, V, description in cases:
            with self.subTest(description):
                root = E('top')
                root.extend([U('one'), V('two')])
                with get_checker_context():
                    root.remove(R('missing'))

        # test removing root[1] (of type R) from [U(), R()]
        cases = self.cases_for_remove_existing_with_mutations(E, Z)
        for R, U, description in cases:
            with self.subTest(description):
                root = E('top')
                root.extend([U('one'), R('rem')])
                with get_checker_context():
                    root.remove(root[1])

    def cases_for_remove_missing_with_mutations(self, E, Z):
        # Cases for removing R() from [U(), V()].