888183 - Web Audio mochitests fail - AudioContext is not defined

Status: RESOLVED DUPLICATE of bug 885583

(Core :: Web Audio, defect)

Description

[JW Wang [:jwwang] [:jw_wang]]

Attachment: mochitest_fail.log

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:20.0) Gecko/20100101 Firefox/20.0 (Beta/Release)
Build ID: 20130329030832

Steps to reproduce:

run Web Audio mochitests on an emulator
(./test.sh mochitest --emulator arm --test-path content/media/webaudio/test/)


Actual results:

Some test cases fail with "uncaught exception - ReferenceError: AudioContext is not defined at http://mochi.test:8888/tests/content/media/webaudio/test/webaudio.js:155"

Comment 1

[JW Wang [:jwwang] [:jw_wang]]

It looks like a timing issue in which it fails to create an AudioContext object immediately after calling SpecialPowers.setBoolPref("media.webaudio.enabled", true);. Adding some delay might help like:

SpecialPowers.setBoolPref("media.webaudio.enabled", true);
addLoadEvent(function() {
    var ac = new AudioContext();
    // ...
});

Comment 2

[JW Wang [:jwwang] [:jw_wang]]

Attachment: Fix mochitest fail - AudioContext is not defined

Comment 3

[JW Wang [:jwwang] [:jw_wang]]

Attachment: Success log with the patch.

Comment 4

[JW Wang [:jwwang] [:jw_wang]]

It looks like the issue is gone because Web Audio is enabled by default in the recent revision. (SpecialPowers.clearUserPref("media.webaudio.enabled"); is removed.)

Comment 5

[(no longer active)]

Yeah, I did that in bug 885583.