'Test that duplicate IDs in the plural validator trips the validator'

def test_duplicate_ids(self):

    textbooks = [{'tab_title': 'name    one', 'url': 'one.pdf', 'id': 1}, {'tab_title': 'name    two', 'url': 'two.pdf', 'id': 1}]
    with self.assertRaises(TextbookValidationError):
        validate_textbooks_json(json.dumps(textbooks))
