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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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Roy Tam 2018-01-19 03:59:58 +08:00
commit dcd9973243
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dom/canvas/test/webgl-mochitest/test_webglcontextcreationerror.html Normal file
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<!DOCTYPE HTML>
<html>
<head>
<meta charset='UTF-8'>
<script src='/tests/SimpleTest/SimpleTest.js'></script>
<link rel='stylesheet' href='/tests/SimpleTest/test.css'>
</head>
<body>
<script>
'use strict';
function RunWithPrefs(prefPairList, func) {
var prefEnv = {'set': prefPairList};
try {
SpecialPowers.pushPrefEnv(prefEnv, func);
} catch (e) {
console.log('Warning: Failed to set prefs: ' + JSON.stringify(prefPairList));
func();
}
}
////////////////////////////////////////
function Check(expr, text) {
ok(expr, text);
return expr;
}
function TestWhenDisabled() {
var c = document.createElement('canvas');
var generatedEvent = null;
var f = function(event) { generatedEvent = event; };
c.addEventListener('webglcontextcreationerror', f);
var gl = c.getContext('webgl'); // Should fail.
do {
if (!Check(!gl, 'When disabled, context creation should fail.'))
break;
if (!Check(generatedEvent, 'Context creation failure should generate an event.'))
break;
var reason = generatedEvent.statusMessage;
if (!Check(reason !== undefined, 'generatedEvent.statusMessage should be defined.'))
break;
ok(reason.length, 'statusMessage should be non-empty.');
} while (false);
SimpleTest.finish();
}
////////////////////////////////////////
SimpleTest.waitForExplicitFinish();
var prefPairList = [
['webgl.disabled', true],
];
RunWithPrefs(prefPairList, TestWhenDisabled);
</script>
</body>
</html>