446197 - test_not-opener.html fails intermittently on Linux unittest VM

Status: RESOLVED DUPLICATE of bug 451090

(Core :: General, defect)

Description

[(not currently active) Ted Mielczarek]

For some reason this test is unreliable running on a VM, it fails intermittently like so:

*** 13276 ERROR TEST-UNEXPECTED-FAIL | /tests/docshell/test/navigation/test_not-opener.html | Should not be able to navigate popup's popup by calling window.open. - got 1, expected 2
*** 13277 ERROR TEST-UNEXPECTED-FAIL | /tests/docshell/test/navigation/test_not-opener.html | Should not be able to navigate popup's popup by submitting form. - got 1, expected 2
*** 13278 ERROR TEST-UNEXPECTED-FAIL | /tests/docshell/test/navigation/test_not-opener.html | Should not be able to navigate popup's popup by targeted hyperlink. - got 1, expected 2

Colin, could you provide some insight as to why the test would fail in this manner? We've seen that a lot of timing-related assumptions fail when running unittests in a VM, but I don't understand this test well enough to see what's happening. If need be, we can check in some debug log statements in the test to help track it down.

Comment 1

[(not currently active) Ted Mielczarek]

Happened again:
http://tinderbox.mozilla.org/showlog.cgi?log=Firefox/1218813548.1218817694.2804.gz

Comment 2

[Adam Barth]

Sounds like the VM is slow and triggering a race condition.  I'm out of the country, but when I get back I'll try to figure out if this is a race in the test or not.  Any ideas how to debug this beyond staring at the code?

Comment 3

[(not currently active) Ted Mielczarek]

We can check in dump statements to do printf-style debugging if you'd like. Sprinkle them liberally to figure out what's going on, then we'll remove them when we fix it.

Comment 4

[Adam Barth]

See also Bug 451090.

Comment 5

[Serge Gautherie (:sgautherie)]

(In reply to comment #4)
> See also Bug 451090.

+/- related: same file, different error.

Comment 6

[(not currently active) Ted Mielczarek]

Adam says these are both the same bug in the test.

Comment 7

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

http://tinderbox.mozilla.org/showlog.cgi?log=Firefox/1239534294.1239541221.17434.gz
Linux mozilla-central unit test
*** 29344 ERROR TEST-UNEXPECTED-FAIL | /tests/docshell/test/navigation/test_not-opener.html | Should not be able to navigate popup's popup by submitting form. - got 1, expected 2
*** 29345 ERROR TEST-UNEXPECTED-FAIL | /tests/docshell/test/navigation/test_not-opener.html | Should not be able to navigate popup's popup by targeted hyperlink. - got 1, expected 2

Comment 8

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

http://tinderbox.mozilla.org/showlog.cgi?log=Firefox3.5/1240230663.1240235031.29743.gz
Linux mozilla-1.9.1 unit test on 2009/04/20 05:31:03