808986 - b-c browser window intermittently gets stuck waiting for focus, so never runs tests

Status: RESOLVED DUPLICATE of bug 521233

(Firefox :: General, defect)

Description

[Graeme McCutcheon [:graememcc]]

Attachment: Failing test run from rev 00c925c90f86

Welcome to another entry in my occasional series of failures that I hit locally, but which don't seem to affect our trees.

I've started hitting an almost-constant-but-not-quite failure where the test harness opens the browser window, but then gets stuck in the waitForFocus call at http://hg.mozilla.org/mozilla-central/file/f9c2c266e7aa/testing/mochitest/browser-test.js#l154 and thus never starts running the test(s).

Watching on screen, the window visually appears focused, it looks like waitForFocus somehow never gets the focus event.

To verify I wasn't going mad, and that the test I was working on wasn't faulty, I reduced the test to the simple
  function test() {
    ok(true, "TEST WAS RUN");
  }
but the problem persisted. hg bisect blames bug 756313.

Attached is output from NSPR_LOG_MODULES=focus:5 TEST_PATH=browser/base/content/test/browser_bug808420.js make -C obj mochitest-browser-chrome with a patch applied to add that test, which is the trivial test described above, applied on top of a working directory at http://hg.mozilla.org/mozilla-central/rev/00c925c90f86.

Comment 1

[Graeme McCutcheon [:graememcc]]

Attachment: Passing test run from rev 556b9cfb269f

For contrast, here's NSPR_LOG_MODULES=focus:5 TEST_PATH=browser/base/content/test/browser_bug808420.js make -C obj mochitest-browser-chrome with my trivial test patch applied on top of http://hg.mozilla.org/mozilla-central/rev/556b9cfb269f (the last known good).

Comment 2

[Neil Deakin]

What Linux are you using, and which window manager?

Comment 3

[Graeme McCutcheon [:graememcc]]

(In reply to Neil Deakin from comment #2)
> What Linux are you using, and which window manager?
Stock Ubuntu 12.04, so compiz/unity

Comment 4

[Dão Gottwald [:dao]]

I'm afraid this sounds like bug 521233.

Comment 5

[Mark Banner (:standard8)]

Looks like there's been various issues with waitForFocus over the years. Seeing as we don't have any more data here and the reporter is gone, I'm going to mark it as a duplicate of bug 521233 as probably the closest thing.