1013222 - WebElement.is_displayed() returns True even when lockscreen element not displayed on the screen

Status: RESOLVED WONTFIX

(Remote Protocol :: Marionette, defect)

Description

[Robert Chira [:RobertC]]

Attachment: page_source.html

test_lockscreen_unlock_to_camera.TestLockScreen.test_unlock_to_camera is failing because the lockscreen element is still interpreted as displayed even though it isn't.

Build info:
Gaia      8a2352d5b7be27ec4b1ea18c680ebcd0b6d34348
Gecko     https://hg.mozilla.org/mozilla-central/rev/cb9f34f73ebe
BuildID   20140519160202
Version   32.0a1
ro.build.version.incremental=eng.tclxa.20131223.163538
ro.build.date=Mon Dec 23 16:36:04 CST 2013

This issue could not be reproduced manually. When unlocking to camera the functionality is as expected. I have attached the page source at the moment of the failure.

Traceback (most recent call last):
File "/var/jenkins/workspace/b2g.hamachi.mozilla-central.ui.smoketest/.env/local/lib/python2.7/site-packages/marionette_client-0.7.7-py2.7.egg/marionette/marionette_test.py", line 163, in run
testMethod()
File "/var/jenkins/workspace/b2g.hamachi.mozilla-central.ui.smoketest/tests/python/gaia-ui-tests/gaiatest/tests/functional/lockscreen/test_lockscreen_unlock_to_camera.py", line 25, in test_unlock_to_camera
lock_screen.wait_for_lockscreen_not_visible()
File "/var/jenkins/workspace/b2g.hamachi.mozilla-central.ui.smoketest/tests/python/gaia-ui-tests/gaiatest/apps/lockscreen/app.py", line 58, in wait_for_lockscreen_not_visible
self.wait_for_element_not_displayed(*self._lockscreen_locator)
File "/var/jenkins/workspace/b2g.hamachi.mozilla-central.ui.smoketest/tests/python/gaia-ui-tests/gaiatest/apps/base.py", line 48, in wait_for_element_not_displayed
lambda m: not m.find_element(by, locator).is_displayed())
File "/var/jenkins/workspace/b2g.hamachi.mozilla-central.ui.smoketest/.env/local/lib/python2.7/site-packages/marionette_client-0.7.7-py2.7.egg/marionette/wait.py", line 143, in until
cause=last_exc)
TimeoutException: TimeoutException: Timed out after 30.1 seconds

Last run in which the test failed:
http://selenium.qa.mtv2.mozilla.com:8080/job/b2g.hamachi.mozilla-central.ui.smoketest/36/testReport/test_lockscreen_unlock_to_camera/TestLockScreen/test_unlock_to_camera/

Test link:
https://github.com/mozilla-b2g/gaia/blob/master/tests/python/gaia-ui-tests/gaiatest/tests/functional/lockscreen/test_lockscreen_unlock_to_camera.py

Comment 1

[Robert Chira [:RobertC]]

STR from https://bugzilla.mozilla.org/show_bug.cgi?id=1011784#c1

hook pdb into Lockscreen.wait_for_lockscreen_not_visible(), and get the following result:

(Pdb) ls = self.marionette.find_element('id', 'lockscreen')
(Pdb) ls.is_displayed()
True
(Pdb) ls.get_attribute('class')
u'unlocked hidden'

Comment 2

[Robert Chira [:RobertC]]

The test is passing now, the issue could have been caused by a change in gaia.
Closing this.

Comment 3

[[:AndreiH]]

I could reproduce this locally and it failed in the latest run on CI:

http://selenium.qa.mtv2.mozilla.com:8080/view/B2G%20Hamachi/job/b2g.hamachi.mozilla-central.ui.smoketest/49/HTML_Report/

Comment 4

[[:AndreiH]]

This started passing now in http://selenium.qa.mtv2.mozilla.com:8080/view/B2G%20Hamachi/job/b2g.hamachi.mozilla-central.ui.smoketest/57/HTML_Report/

Gaia      26d8fcab9b61f46451600f39c51e0387ef3c4f88                        
Gecko     https://hg.mozilla.org/mozilla-central/rev/e6f113c83095         
BuildID   20140530040207                                                  
Version   32.0a1                                                          
ro.build.version.incremental=eng.tclxa.20131223.163538                    
ro.build.date=Mon Dec 23 16:36:04 CST 2013

Comment 5

[Zac C (:zac)]

This test referred in comment #4 has a false positive.

The bug here is still valid, but to provide a more accurate STR:

1. Set a passcode on the device
2. Lock the device
3. Run:
>>> ls = m.find_element('id', 'lockscreen')
>>> ls.is_displayed()
True

4. Activate the passcode screen but without unlocking the device, tap the camera so you go into 'locked camera' mode

5. Run:
>>> ls.is_displayed()
True

Comment 6

[Martijn Wargers (dead)]

Attachment: all.diff

This can still be reproduce using this patch and with the mentioned test in the patch.
Lockscreen is part of the system app, which I think is always visible, the lockscreen is apparently also still visible, but in this case, when the camera is open, is completely overlayed by the camera app.

Comment 7

[David Burns :automatedtester]

Closing out B2G related bugs. If these still happen and are valuable, please reopen with details again and how this affects Desktop/Fennec