def test_save_with_metadata(self):
title = "Test Resource"
course = TestResource.test_course
default_metadata = Resource.metadata_default()
missing_metadata = ("", None)
invalid_metadata = (None, True, False, 123, {})
valid_metadata = ([], [{"label":"X", "value": "Y"}])
# check that missing or invalid metadata values are saved using the default value
# for example the string "null" is not a valid value, so it should be overwritten with "[]"
for metadata in missing_metadata + invalid_metadata:
instance = Resource(course=course, title=title, metadata=metadata)
instance.save()
self.assertNotEqual(metadata, instance.metadata)
self.assertEqual(default_metadata, instance.metadata)
# check that valid metadata is saved unchanged
for metadata in valid_metadata:
instance = Resource(course=course, title=title, metadata=json.dumps(metadata))
instance.save()
self.assertEqual(json.dumps(metadata), instance.metadata)
