将我的测试环境升级到最新版本 selenium 后, splinter和 Firefox,我的一项测试现在在使用 Firefox 时大约 80% 的情况下会失败,具体情况如下:
Traceback (most recent call last):
File "/Users/rbednark/Dropbox/git/quizme_website/questions/tests.py", line 103, in test_login_fails_incorrect_username
"Your username and password didn't match. Please try again."
File "/Users/rbednark/.virtualenvs/quizme-django-1.6.5/lib/python2.7/site-packages/splinter/driver/webdriver/__init__.py", line 302, in is_text_present
self.driver.find_element_by_tag_name('body').text.index(text)
File "/Users/rbednark/.virtualenvs/quizme-django-1.6.5/lib/python2.7/site-packages/selenium/webdriver/remote/webelement.py", line 73, in text
return self._execute(Command.GET_ELEMENT_TEXT)['value']
File "/Users/rbednark/.virtualenvs/quizme-django-1.6.5/lib/python2.7/site-packages/selenium/webdriver/remote/webelement.py", line 494, in _execute
return self._parent.execute(command, params)
File "/Users/rbednark/.virtualenvs/quizme-django-1.6.5/lib/python2.7/site-packages/selenium/webdriver/remote/webdriver.py", line 236, in execute
self.error_handler.check_response(response)
File "/Users/rbednark/.virtualenvs/quizme-django-1.6.5/lib/python2.7/site-packages/selenium/webdriver/remote/errorhandler.py", line 192, in check_response
raise exception_class(message, screen, stacktrace)
StaleElementReferenceException: Message: The element reference is stale. Either the element is no longer attached to the DOM or the page has been refreshed.
请注意,使用 Chrome 和 phantomjs 进行相同的测试 100% 成功。测试:
self.browser.visit(self.live_server_url)
self.assertEquals(self.browser.title, 'Quiz Me!')
self.browser.find_by_id('id_username')[0].fill(user)
self.browser.find_by_id('id_password')[0].fill(password)
# note that the following click() causes a page load
self.browser.find_by_value('login').click()
self.assertTrue(
self.browser.is_text_present(
"Your username and password didn't match. "
"Please try again."
)
)
Firefox 从 49.0.2
升级到 50.1.0
selenium 从 2.46.0
升级到 3.0.2
splinter从0.6.0
升级到0.7.5
geckodriver 0.13.0
(以上均为发布时的最新版本)
最佳答案
我通过实现这个包装器解决了我的问题,该包装器在捕获异常时重试:
from selenium.common.exceptions import StaleElementReferenceException
def _loop_is_text_present(text, max_attempts=3):
attempt = 1
while True:
try:
return self.browser.is_text_present(text)
except StaleElementReferenceException:
if attempt == max_attempts:
raise
attempt += 1
灵感来源:http://darrellgrainger.blogspot.com/2012/06/staleelementexception.html
Selenium 源代码 describes the StaleElementReferenceException.
关于python - 为什么 split is_text_present() 会导致 Firefox 间歇性出现 StaleElementReferenceException(但 Chrome 或 phantomjs 不会)?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/41539231/