'Test that delete bookmark with invalid usage id returns 400.'

def test_delete_bookmark_with_invalid_usage_id(self):

    response = self.send_delete(client=self.client, url=reverse('bookmarks_detail', kwargs={'username': self.user.username, 'usage_id': 'i4x'}), expected_status=404)
    self.assertEqual(response.data['user_message'], u'Invalid    usage_id:    i4x.')
