Method test_trait_metadata_deprecated

tests/test_traitlets.py:838–845

(self)

        self.assertTrue(a.trait_has_value("f"))

    def test_trait_metadata_deprecated(self):
        with expected_warnings([r"metadata should be set using the \.tag\(\) method"]):

            class A(HasTraits):
                i = Int(config_key="MY_VALUE")

        a = A()
        self.assertEqual(a.trait_metadata("i", "config_key"), "MY_VALUE")

    def test_trait_metadata(self):
        class A(HasTraits):