dom/browser-element/mochitest/priority/test_WebGLContextLost.html@6474c204b198
dom/browser-element/mochitest/priority/test_WebGLContextLost.html
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
1 <!DOCTYPE HTML>
2 <html>
3 <!--
4 Test that calling setVisible('false') and then sending a low-memory
5 notification causes a WebGL context loss event.
6 -->
7 <head>
8 <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
9 <script type="application/javascript" src="../browserElementTestHelpers.js"></script>
10 <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
11 </head>
12 <body>
14 <script type="application/javascript;version=1.7">
15 "use strict";
17 SimpleTest.waitForExplicitFinish();
18 browserElementTestHelpers.setEnabledPref(true);
19 browserElementTestHelpers.addPermission();
20 browserElementTestHelpers.enableProcessPriorityManager();
22 function runTest() {
23 var iframe = document.createElement('iframe');
24 iframe.setAttribute('mozbrowser', true);
25 iframe.src = 'file_WebGLContextLost.html';
27 // We use this to ensure that we don't call SimpleTest.finish() twice.
28 var finished = false;
29 function finishOnce() {
30 if (!finished) {
31 SimpleTest.finish();
32 finished = true;
33 }
34 }
36 expectMozbrowserEvent(iframe, 'error').then(function(e) {
37 if (finished) {
38 // We don't care if the frame dies after the test finishes.
39 return;
40 }
41 todo(false, "child process is crashing; this probably indicates that " +
42 "something is wrong with WebGL in child processes on your machine.");
43 is(e.detail.type, 'fatal');
44 }).then(finishOnce);
46 var childID = null;
47 expectOnlyOneProcessCreated().then(function(chid) {
48 childID = chid;
49 return Promise.all(
50 [expectPriorityChange(childID, 'FOREGROUND'),
51 expectMozbrowserEvent(iframe, 'loadend'),
52 expectMozbrowserEvent(iframe, 'showmodalprompt').then(function(e) {
53 is(e.detail.message, 'ready');
54 })
55 ]);
56 }).then(function() {
57 // Fire a low-memory notification once the process goes into the background
58 // due to the setVisible(false) call below.
59 expectPriorityChange(childID, 'BACKGROUND').then(function() {
60 SimpleTest.executeSoon(function() {
61 var os = SpecialPowers.Cc["@mozilla.org/observer-service;1"]
62 .getService(SpecialPowers.Ci.nsIObserverService);
63 os.notifyObservers(null, "memory-pressure", "low-memory");
64 ok(true, 'Successfully notified observers.');
65 });
66 });
68 // This test isn't the only possible source of a low-memory notification; the
69 // browser can fire one whenever it likes. So it's fine if we lose the
70 // WebGL context before we fire the low-memory notification ourself.
72 var p = expectMozbrowserEvent(iframe, 'showmodalprompt').then(function(e) {
73 is(e.detail.message, 'webglcontextlost');
74 });
76 iframe.setVisible(false);
77 return p;
78 }).then(finishOnce);
80 document.body.appendChild(iframe);
81 }
83 addEventListener('testready', function() {
84 // At the time this test was written, webgl was blocklisted inside child
85 // processes on desktop Linux. The issue is that we spawn a child process to
86 // read driver info, but we only did this on the main prrocess. Child
87 // processes never read the driver info themselves, nor do they get it from
88 // their parent, so they refuse to start up WebGL.
89 //
90 // This isn't a problem on B2G because we force WebGL on there. But it
91 // obviously makes this test difficult. bjacob says forcing WebGL on here
92 // shouldn't hurt things, and anyway this setting mirrors what we do on B2G,
93 // which is what we're trying to test!
94 SpecialPowers.pushPrefEnv({set: [["webgl.force-enabled", true]]},
95 runTest);
96 });
98 </script>
99 </body>
100 </html>
