django-embed-video/embed_video/tests/backends/__init__.py

from embed_video.backends import detect_backend


class BackendTestMixin(object):
    urls = []
    instance = None

    def test_detect(self):
        for url in self.urls:
            backend = detect_backend(url[0])
            self.assertIsInstance(backend, self.instance)

    def test_code(self):
        for url in self.urls:
            backend = self.instance(url[0])
            self.assertEqual(backend.code, url[1])