def test_raise(self) -> None:
# arrange
known_ic_class = LoadableImageCrawlerA
kic = KnownImageCrawlers([])
kic._list = [('test', known_ic_class)]
# act & assert
with self.assertRaises(TypeError):
kic._test_duplicate_class(known_ic_class)
def test_success_filled(self) -> None:
# arrange
kic = KnownImageCrawlers([])
kic._list = [('test', LoadableImageCrawlerA)]
# act
kic._test_duplicate_class(LoadableImageCrawlerB)
# assert
self.assertTrue(True, 'no errors thrown')