Function test_struct_meta_subclass_inheritance

tests/unit/test_struct_meta.py:298–332

Test multi-level inheritance of StructMeta subclasses.

()

def test_struct_meta_subclass_inheritance():
    """Test multi-level inheritance of StructMeta subclasses."""

    # Define the first level custom metaclass
    class BaseMeta(StructMeta):
        """Base custom metaclass"""

    # Define the second level custom metaclass
    class DerivedMeta(BaseMeta):
        """Derived custom metaclass"""

    # Use the second level custom metaclass to create a struct class
    class DerivedStruct(metaclass=DerivedMeta):
        a: int
        b: str

    # Create an instance
    obj = DerivedStruct(a=42, b="derived")
    assert obj.a == 42
    assert obj.b == "derived"

    # Test various functions
    # asdict
    d = asdict(obj)
    assert d["a"] == 42
    assert d["b"] == "derived"

    # astuple
    t = astuple(obj)
    assert t == (42, "derived")

    # replace
    obj2 = replace(obj, a=99)
    assert obj2.a == 99
    assert obj2.b == "derived"


def test_struct_meta_subclass_with_encoder():