1216949 - Some interactions are not effective unless Firefox window is in focus

Status: RESOLVED DUPLICATE of bug 1398111

(Remote Protocol :: Marionette, defect, P3)

Description

[Dave Hunt [:davehunt] [he/him] ⌚BST]

This has been an issue in the past with Selenium and FirefoxDriver, however it is also reproducible in Marionette. Some interactions such as click appear to be queued until the Firefox window has focus. Here's a Python script using the marionette-driver package that reproduces this as seen on the mozilla.org site:

from marionette_driver.marionette import Marionette
from marionette_driver import By
from marionette_driver import Wait
from marionette_driver import expected

driver = Marionette(bin='/Applications/Firefox.app/Contents/MacOS/firefox-bin')
driver.start_session()
wait = Wait(driver, timeout=10)
driver.navigate('https://www.mozilla.org/en-US/contribute/')
form = driver.find_element(By.ID, 'form-details')
assert not form.is_displayed()
driver.find_element(By.ID, 'id_email').click()
wait.until(expected.element_displayed(form))

Note that you will need to bring another window in front of Firefox after it's launched. Marionette appears to bring the window into focus by default, however when launched via Selenium and Wires the window defaults to the background.

Comment 1

[Alex Gibson [:agibson]]

Note I don't think it's a click being queued here, but a focus event instead. See here for the relevant Js on the page:

https://github.com/mozilla/bedrock/blob/master/media/js/newsletter/form.js#L23

Comment 2

[Henrik Skupin [:whimboo][⌚️UTC+2]]

This is basically bug 1398111.