def test_supportscast_types_support_protocol_or_are_castable(protocol, typ, data):
value = data.draw(st.from_type(protocol))
# check that we aren't somehow generating instances of the protocol itself
assert value.__class__ != protocol
# test values drawn from the protocol types either support the protocol
# or can be cast to typ
assert issubclass(type(value), protocol) or types.can_cast(typ, value)
def test_can_cast():
assert types.can_cast(int, "0")
assert not types.can_cast(int, "abc")
