Why switching to alert through selenium is not stable?

Question

For example.
1. Run a code and all good. Everything worked out well. But if this code is run in a few minutes, then there may be errors. There is no element you can click on, for example. And so on.
2. On one site there is an alert window.

alert = driver.switch_to_alert()
alert.dismiss()

So I close it. But he works through time. All is well, then errors.

for al in range(3):
    try:
        alert = driver.switch_to_alert()
        alert.dismiss()
        time.sleep(randint(1, 3))
    except:
        pass

I wrote and everything works out as it should.
But I think that this is not beautiful.
Why is everything so unstable?
Thank you very much.

Are there multiple alerts? Multiple tabs? What exactly stops working if you just dismiss the alert once? Perhaps you need to explicitly switch back to the main window/tab. — Chuk Ultima, Feb 17 '18 at 08:23
Please provide an example of complete code which sometimes works and sometimes doesn't, i.e., [mcve](https://stackoverflow.com/help/mcve). Your second part is a bit confusing. *Everything works but it's not beautiful* implies a different question. — Reti43, Feb 17 '18 at 08:32

undetected Selenium · Accepted Answer · 2019-04-21T19:35:17.257

As per your code block there are a couple of issues which you need to address as follows :

Switching to an Alert : The method switch_to_alert() is Deprecated and you should be using switch_to.alert instead. The API Docs clearly mentions the following :

 def switch_to_alert(self):
     """ Deprecated use driver.switch_to.alert
     """
     warnings.warn("use driver.switch_to.alert instead", DeprecationWarning)
     return self._switch_to.alert

Wait for the Alert to be present : You should always induce WebDriverWait for the Alert to be present before invoking accept() or dismiss() as follows :
```
WebDriverWait(driver, 5).until(EC.alert_is_present).dismiss()
```

score 0 · Answer 2 · edited Jun 02 '20 at 21:12

0

This will click the OK button on the alert:

driver.switch_to.alert.accept()

This will click the CANCEL button on the alert:

driver.switch_to.alert.dismiss()

edited Jun 02 '20 at 21:12

Jeremy Caney

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answered Jun 02 '20 at 00:45

Sylvester Aklamavo

1
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Why switching to alert through selenium is not stable?

2 Answers2

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