python - 服从测试山羊 - 回溯

Question

所以我正在阅读这本书《服从测试山羊》，在学习 Python 时我在第六章中遇到了一个问题。它说我应该能够运行我们在本章和前一章中设置的功能测试，没有错误；但是，我不断收到我不知道如何修复的回溯。

Traceback (most recent call last):
  File "C:\Users\YaYa\superlists\functional_tests\tests.py", line 54, in test_can_start_a_list_and_retrieve_it_later
    self.check_for_row_in_list_table('1: Buy peacock feathers')
  File "C:\Users\YaYa\superlists\functional_tests\tests.py", line 15, in check_for_row_in_list_table
    table = self.browser.find_element_by_id('id_list_table')
  File "C:\Users\YaYa\AppData\Local\Programs\Python\Python35-32\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 269, in find_element_by_id
    return self.find_element(by=By.ID, value=id_)
  File "C:\Users\YaYa\AppData\Local\Programs\Python\Python35-32\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 752, in find_element
    'value': value})['value']
  File "C:\Users\YaYa\AppData\Local\Programs\Python\Python35-32\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 236, in execute
    self.error_handler.check_response(response)
  File "C:\Users\YaYa\AppData\Local\Programs\Python\Python35-32\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 192, in check_response
    raise exception_class(message, screen, stacktrace)
    selenium.common.exceptions.NoSuchElementException: Message: Unable to locate element: {"method":"id","selector":"id_list_table"}
Stacktrace:
    at FirefoxDriver.prototype.findElementInternal_ (file:///C:/Users/YaYa/AppData/Local/Temp/tmp869pyxau/extensions/fxdriver@googlecode.com/components/driver-component.js:10770)
    at fxdriver.Timer.prototype.setTimeout/<.notify (file:///C:/Users/YaYa/AppData/Local/Temp/tmp869pyxau/extensions/fxdriver@googlecode.com/components/driver-component.js:625)

I've created a GIST in case anyone's interested in looking at the files that I've worked on throughout the chapters 。

您还可以访问本书的章节:here .

我真的不知道问题是什么(我一点也不擅长Python，并尝试运行pdb，但我什至不知道它的一半意味着什么)，而且我认识的人和我的人都没有我已询问是否有任何有关我可以采取哪些措施来解决此问题的信息。

提前致谢!

编辑:这是 test_can_start_a_list_and_retrieve_it_later - 只是一个注释，以防需要，但 def test_can... 行号是 19。

def test_can_start_a_list_and_retrieve_it_later(self):
    # Edith has heard about a cool new online to-do app. She goes
    # to check out its homepage
    self.browser.get(self.live_server_url)

    # She notices the page title and header mention to-do lists
    self.assertIn('To-Do', self.browser.title)
    header_text = self.browser.find_element_by_tag_name('h1').text
    self.assertIn('To-Do', header_text)

    # She is invited to enter a to-do item straight away
    inputbox = self.browser.find_element_by_id('id_new_item')
    self.assertEqual(
            inputbox.get_attribute('placeholder'),
            'Enter a to-do item'
    )

    # She types "Buy peacock feathers" into a text box (Edith's hobby
    # is tying fly-fishing lures)
    inputbox.send_keys('Buy peacock feathers')

    # When she hits enter, the page updates, and now the page lists
    # "1: Buy peacock feathers" as an item in a to-do list
    inputbox.send_keys(Keys.ENTER)
    edith_list_url = self.browser.current_url
    self.assertRegex(edith_list_url, '/lists/.+')
    self.check_for_row_in_list_table('1: Buy peacock feathers')

    # There is still a text box inviting her to add another item. She
    # enters "Use peacock feathers to make a fly" (Edith is very methodical)
    inputbox = self.browser.find_element_by_id('id_new_item')
    inputbox.send_keys('Use peacock feathers to make a fly')
    inputbox.send_keys(Keys.ENTER)

    # The page updates again, and now shows both items on her list
    self.check_for_row_in_list_table('1: Buy peacock feathers')
    self.check_for_row_in_list_table('2: Use peacock feathers to make a fly')

    # Now a new user, Francis, comes along to the site.

    ##We use a new browser session to make sure that no information
    ##of Edith's is coming through from cookies etc
    self.browser.quit()
    self.browser = webdriver.Firefox()

    #Francis visits the home page. There is no sign of Edith's
    #list
    self.browser.get(self.live_server_url)
    page_text = self.browser.find_element_by_tag_name('body').text
    self.assertNotIn('Buy peacock feathers', page_text)
    self.assertNotIn('make a fly', page_text)

    #Francis starts a new list by entering a new item. He
    #is less interesting than Edith...
    inputbox = self.browser.find_element_by_id('id_new_item')
    inputbox.send_keys('Buy milk')
    inputbox.send_keys(Keys.ENTER)

    #Francis gets his own unique URL
    francis_list_url = self.browser.current_url
    self.assertRegex(francis_list_url, '/lists/.+')
    self.assertNotEqual(francis_list_url, edith_list_url)

    #Again, there is no trace of Edith's list
    page_text = self.browser.find_element_by_tag_name('body').text
    self.assertNotIn('Buy peacock feathers', page_text)
    self.assertIn('Buy milk', page_text)
    self.fail('Finish the test!')

    # Satisfied, they both go back to sleep

编辑2:这是check_for_row_in_list_table。请注意，这从文档的第 14 行开始。

def check_for_row_in_list_table(self, row_text):
    table = self.browser.find_element_by_id('id_list_table')
    rows = table.find_elements_by_tag_name('tr')
    self.assertIn(row_text, [row.text for row in rows])

Answer 1

在我的工作中发现了错误。我显然在 list.html 中缺少一个 s

<form method="POST" action="/lists/{{ list.id }}/add_item">