How to set UnexpectedAlertBehaviour in Selenium Python

问题

This question deals with setting the UnexpectedAlertBehaviour of a Selenium webdriver in Java. How do you do the same thing in Python's ChromeDriver?

I have tried the following;

    options = ChromeOptions()
    options.headless = True
    options.set_capability("UNEXPECTED_ALERT_BEHAVIOUR", "ACCEPT")
    options.set_capability("unexpectedAlertBehaviour", "accept")
    options.set_capability("CapabilityType.UNEXPECTED_ALERT_BEHAVIOUR", "ACCEPT")
    options.set_capability("UnexpectedAlertBehaviour", "ACCEPT")
    webdriver.DesiredCapabilities.CHROME["unexpectedAlertBehaviour"] = "accept"
    cls.driver = webdriver.Chrome(chrome_options=options)

However, I am still randomly experiencing this unexpectedalertpresent exception:

selenium.common.exceptions.UnexpectedAlertPresentException: Alert Text: Message: unexpected alert open: {Alert text : }

When I run the browser in non headless mode (head mode?) I see no such alerts, but the test still randomly fails with this exception, despite my efforts to set this elusive option.

回答1:

As chromedriver becoming W3C compliant . We need use unhandledPromptBehavior Checked on ChromeDriver 76.0.3809.126 (Runs in W3C standard compliant mode by default)

chrome_options = Options()
chrome_options.set_capability('unhandledPromptBehavior', 'accept')
driver = webdriver.Chrome(options=chrome_options)
driver.get("https://www.google.com")
driver.execute_script('alert(\"HI\");')
time.sleep(10)
print(driver.title)
time.sleep(10)

Reference Chromedriver: Issue 2597: Support new unhandledPromptBehavior modes

来源：https://stackoverflow.com/questions/57700388/how-to-set-unexpectedalertbehaviour-in-selenium-python

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python

selenium

exception

selenium-chromedriver