python - 使用 Selenium/Python 验证 div 中是否存在文本时出现问题

Question

所以我试图验证文本是一个元素，基本上我正在测试找不到搜索结果时会发生什么。但是我每次都会收到以下错误消息，但我无法弄清楚原因。

Traceback (most recent call last):
  File "test.py", line 40, in test_article_no_result_search
    assert article_results_page.is_articles_not_found(), "Articles found surprisingly."
  File "/Users/tester/Documents/Automated Tests/foobar/page.py", line 71, in is_articles_not_found
    return "No Results Available" in element.get_attribute("value")
TypeError: argument of type 'NoneType' is not iterable

我正在尝试验证的 HTML 元素

<div class="simple-div results-num-span" data-node="group_0.SimpleDiv_0">No Results Available</div>

这是我的 test.py 测试用例

class SearchTest(unittest.TestCase):
    def setUp(self):
        self.driver = webdriver.Chrome()
        self.driver.get(TestingURLS.URL)

    def test_article_no_result_search(self):
        main_page = MainPage(self.driver)
        main_page.load_page()
        main_page.click_article_search_input_clear()
        main_page.enter_no_result_search_term()
        main_page.click_article_search_button()
        article_results_page = ArticleResultsPage(self.driver)
        article_results_page.load_page()
        assert article_results_page.is_articles_not_found(), "Articles found surprisingly."

    def tearDown(self):
        self.driver.quit

page.py中相关函数

def is_articles_not_found(self):
    element = self.driver.find_element(*SearchResultLocators.UPPER_RESULT_DISPLAY)
    return "No Results Available" in element.get_attribute("value")

来自locators.py的相关定位器

class SearchResultLocators(object):
    UPPER_RESULT_DISPLAY = (By.CSS_SELECTOR, "div.simple-div.results-num-span")
    RESULT_COUNT = (By.CSS_SELECTOR, "div.num-shown")
    FIRST_ARTICLE_RESULT = (By.CSS_SELECTOR, "div.result")

Answer 1

element.get_attribute("value") 可以应用于 "text" 类型的 input 节点。在您的情况下，它是带有子文本节点的 div ，因此您可以执行以下断言:

from selenium.webdriver.support.ui import WebDriverWait as wait
from selenium.common.exceptions import TimeoutException

def is_articles_not_found(self):
    element = self.driver.find_element(*SearchResultLocators.UPPER_RESULT_DISPLAY)
    try:
        return wait(self.driver, 3).until(lambda driver: element.text == "No Results Available")
    except TimeoutException:
        return False