test_list_item_validation.py 文件源码

def test_cannot_add_duplicate_items(self):
        # Edith goes to the home page and starts a new list
        self.browser.get(self.live_server_url)
        self.get_item_input_box().send_keys('Buy wellies')
        self.get_item_input_box().send_keys(Keys.ENTER)
        self.wait_for_row_in_list_table('1: Buy wellies')

        # She accidentally tries to enter a duplicate item
        self.get_item_input_box().send_keys('Buy wellies')
        self.get_item_input_box().send_keys(Keys.ENTER)

        # She sees a helpful error message
        self.wait_for(lambda: self.assertEqual(
            self.browser.find_element_by_css_selector('.has-error').text,
            "You've already got this in your list"
        ))