def test_list_nested_dtype():
dt = ListDtype(ListDtype("int32"))
expect = ListDtype("int32")
got = dt.element_type
assert expect == got
def test_list_dtype_eq():
lhs = ListDtype("int32")
rhs = ListDtype("int32")
assert lhs == rhs
rhs = ListDtype("int64")
assert lhs != rhs
