test_list_item_validation.py 文件源码

def test_cannot_add_empty_list_items(self):

        # Edith goes to the home page and accidentally tries to submit
        # an empty list item. She hits Enter on the empty input box
        self.browser.get(self.live_server_url)
        self.get_item_input_box().send_keys(Keys.ENTER)
        # The browser intercepts the request, and does not load the
        # list page
        self.wait_for(lambda: self.browser.find_elements_by_css_selector('#id_text:invalid'))  
        # She starts typing some text for the new item and the error disappears
        self.get_item_input_box().send_keys('Buy milk')
        self.wait_for(lambda: self.browser.find_elements_by_css_selector('#id_text:valid'))
        # And she can submit it successfully
        self.get_item_input_box().send_keys(Keys.ENTER)
        self.wait_for_row_in_list_table('1: Buy milk')
        # Perversely, she now decides to submit a second blank list item
        self.get_item_input_box().send_keys(Keys.ENTER)
        # Again, the browser will not comply
        self.wait_for_row_in_list_table('1: Buy milk')
        self.wait_for(lambda: self.browser.find_elements_by_css_selector('#id_text:invalid'))
        # And she can correct it by filling some text in
        self.get_item_input_box().send_keys('Make tea') 
        self.wait_for(lambda: self.browser.find_elements_by_css_selector('#id_text:valid'))
        self.get_item_input_box().send_keys(Keys.ENTER)
        self.wait_for_row_in_list_table('1: Buy milk')
        self.wait_for_row_in_list_table('2: Make tea')