Function test_dict_default_value

tests/test_traitlets.py:1945–1956

Check that the `{}` default value of the Dict traitlet constructor is actually copied.

()

def test_dict_default_value():
    """Check that the `{}` default value of the Dict traitlet constructor is
    actually copied."""

    class Foo(HasTraits):
        d1 = Dict()
        d2 = Dict()

    foo = Foo()
    assert foo.d1 == {}
    assert foo.d2 == {}
    assert foo.d1 is not foo.d2


class TestValidationHook(TestCase):