def test_unregister(self):
key = 'tests.test_formfields.CharField'
registry.register(CharField)
registry.unregister(key)
self.assertIsNone(registry.get(key))
def test_register(self):
registry.register(CharField)
cls = registry.get('tests.test_formfields.CharField')
self.assertEqual(cls, CharField)
self.assertEqual(cls.get_display_type(), 'Char')
