Automatic screenshots when test fail by Selenium Webdriver in Python

Question

I want to automatic capturing screenshots if my webdriver tests failed (any exception or assertion error). I am using Python unittest and Selenium Webdriver. Does anyone hav

Answer 1

For Django 2.2.2 (which uses unittest) in my class for selenium tests, which inherited from StaticLiveServerTestCase I've overrided _feedErrorsToResult method. Also this approach provides tricky way to know name of called method for convinient screenshot investigation.

@classmethod
def _feedErrorsToResult(cls, result, errors):
    """
    Overriding private method at %library root%/Lib/unittest/case.py
    so you can take screenshot with any failed test and find name of the method
    """
    if SELENIUM_TAKE_SCREENSHOTS:
        for test, exc_info in errors:
            if exc_info is not None:
                now = datetime.now().strftime('%y-%m-%d_%H-%M-%S')
                test_name = exc_info[2].tb_frame.f_locals["test_case"]._testMethodName
                # noinspection PyUnresolvedReferences
                cls.selenium.get_screenshot_as_file('%s/%s-%s-%s.png' % (SELENIUM_SCREENSHOTS_PATH, cls.__name__, test_name, now))
    # noinspection PyUnresolvedReferences
    super()._feedErrorsToResult(cls, result, errors)