Class TestForwardDeclaredInstanceList

tests/test_traitlets.py:2500–2520

class TestForwardDeclaredInstanceList(TraitTestBase):
    obj = ForwardDeclaredInstanceListTrait()

    def test_klass(self):
        """Test that the instance klass is properly assigned."""
        self.assertIs(self.obj.traits()["value"]._trait.klass, ForwardDeclaredBar)

    _default_value: t.List[t.Any] = []
    _good_values = [
        [ForwardDeclaredBar(), ForwardDeclaredBarSub()],
        [],
    ]
    _bad_values = [
        ForwardDeclaredBar(),
        [ForwardDeclaredBar(), 3, None],
        "1",
        # Note that this is the type, not an instance.
        [ForwardDeclaredBar],
        [None],
        None,
    ]


class TestForwardDeclaredTypeList(TraitTestBase):