Selenium - NoSuchElementException after switching

问题:

I have receive an error, element not found in the Firefox GeckoDriver browser

when i switch from window[1] to frame[0], back to window[1], and then click the close frame button.

I want to continue using GeckoDriver because i was having performance issues with ChromeDriver. Sorry this is an internal website and I can't share the HTML.

1. I have done the following to pinpoint the issue.
   • Tested with exact same code and works properly in Chrome driver
   • Works in Firefox when i switch to window[1] click the openframe button, and then click the closeframe button, without switching to frame[0].
   • I can switch to frame[0], switch back to window[1] and do a driver.close() and it will close window[1].
   • I can read the driver.page_source from window[1] after switching back from frame[0] and see that the element is still in the page_source and has not changed.
   • I can switch from frame[0] back to window[0] and click the button to re-open window[1] and that works properly. Then i can click the open and close frame buttons.

So the problem just resides on switching from frame[0] back to window[1], then trying to click an element in window[1] in Firefox GeckoDriver.

Python: 2.7
Selenium: 3.0.1
GeckoDriver: v0.13.0
Firefox: 51.0.1

Here is the code:

firefox_capabilities = DesiredCapabilities.FIREFOX
firefox_capabilities['marionette'] = True
driver = webdriver.Firefox(capabilities=firefox_capabilities)
driver.get('www.internalwebsite.com')
driver.find_element_by_id('opensnewwindow').click()
driver.switch_to_window(driver.window_handles[1])
driver.find_element_by_id('opennewframe').click()
driver.switch_to_frame(0)
//read contents
driver.switch_to_window(driver.window_handles[1])
driver.find_element_by_id('closeframe').click()

Error:

selenium.common.exceptions.NoSuchElementException: Message: Unable to locate element: [id="closeframe"]

回答1:

The code below seemed to do the trick. Still not sure why though.

driver.switch_to.default_content()

firefox_capabilities = DesiredCapabilities.FIREFOX
firefox_capabilities['marionette'] = True
driver = webdriver.Firefox(capabilities=firefox_capabilities)
driver.get('www.internalwebsite.com')
driver.find_element_by_id('opensnewwindow').click()
driver.switch_to_window(driver.window_handles[1])
driver.find_element_by_id('opennewframe').click()
driver.switch_to_frame(0)
//read contents
driver.switch_to.default_content()
driver.switch_to_window(driver.window_handles[1])
driver.find_element_by_id('closeframe').click()