dom/browser-element/mochitest/priority/test_HighPriority.html@6474c204b198
dom/browser-element/mochitest/priority/test_HighPriority.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 frames with mozapptype=critical which hold the "high-priority" or
5 "cpu" wake locks get elevated process priority.
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 // To test bug 870480, run this test while holding the CPU and high-priority
24 // wake locks. Without the fix for bug 870480, we won't set the priority of
25 // the child process if the main process holds these wake locks and the test
26 // will hang.
27 navigator.requestWakeLock('cpu');
28 navigator.requestWakeLock('high-priority');
30 var iframe = document.createElement('iframe');
31 iframe.setAttribute('mozbrowser', true);
32 iframe.setAttribute('mozapptype', 'critical');
33 iframe.src = 'file_HighPriority.html';
35 // We expect the following to happen:
36 //
37 // - Process is created.
38 // - Its priority is set to FOREGROUND (when the process starts).
39 // - wait_alert('step0', FOREGROUND_HIGH)
40 // - wait_alert('step1', FOREGROUND)
41 // - wait_alert('step2', FOREGROUND_HIGH)
42 //
43 // Where wait_alert(M, P) means that we expect the subprocess to
44 // * do alert(M) and
45 // * be set to priority P
46 // in some order. If the alert occurs before the priority change, we block
47 // the alert until we observe the priority change. So the subprocess only
48 // has to do
49 //
50 // // set priority to FOREGROUND_HIGH
51 // alert('step0');
52 // // set priority to FOREGROUND
53 // alert('step1');
54 //
55 // etc.
57 var childID = null;
58 var alertTimes = [];
60 // Return a promise that's resolved once the child process calls alert() and
61 // we get a priority change, in some order.
62 //
63 // We check that the text of the alert is |"step" + index|.
64 //
65 // If gracePeriod is given, we check that the priority change occurred at
66 // least gracePeriod ms since the alert from the previous step (with a fudge
67 // factor to account for inaccurate timers).
68 function expectAlertAndPriorityChange(index, priority, /* optional */ gracePeriod) {
69 function checkAlertInfo(e) {
70 is(e.detail.message, 'step' + index, 'alert() number ' + index);
71 alertTimes.push(new Date());
73 // Block the alert; we'll unblock it by calling e.detail.unblock() later.
74 e.preventDefault();
75 return Promise.resolve(e.detail.unblock);
76 }
78 function checkGracePeriod() {
79 if (gracePeriod) {
80 var msSinceLastAlert = (new Date()) - alertTimes[index - 1];
82 // 50ms fudge factor. This test is set up so that, if nsITimers are
83 // accurate, we don't need any fudge factor. Unfortunately our timers
84 // are not accurate! There's little we can do here except fudge.
85 // Thankfully all we're trying to test is that we get /some/ delay; the
86 // exact amount of delay isn't so important.
87 ok(msSinceLastAlert + 50 >= gracePeriod,
88 msSinceLastAlert + "ms since last alert >= (" + gracePeriod + " - 50ms)");
89 }
90 }
92 return Promise.all(
93 [expectMozbrowserEvent(iframe, 'showmodalprompt').then(checkAlertInfo),
94 expectPriorityChange(childID, priority).then(checkGracePeriod)]
95 ).then(function(results) {
96 // checkAlertInfo returns the function to call to unblock the alert.
97 // It comes to us as the first element of the results array.
98 results[0]();
99 });
100 }
102 expectProcessCreated().then(function(chid) {
103 childID = chid;
104 return expectPriorityChange(childID, 'FOREGROUND');
105 }).then(function() {
106 return expectAlertAndPriorityChange(0, 'FOREGROUND_HIGH');
107 }).then(function() {
108 return expectAlertAndPriorityChange(1, 'FOREGROUND', priorityChangeGracePeriod);
109 }).then(function() {
110 return expectAlertAndPriorityChange(2, 'FOREGROUND_HIGH');
111 }).then(function() {
112 return expectAlertAndPriorityChange(3, 'FOREGROUND', priorityChangeGracePeriod);
113 }).then(SimpleTest.finish);
115 document.body.appendChild(iframe);
116 }
118 const priorityChangeGracePeriod = 100;
119 addEventListener('testready', function() {
120 SpecialPowers.pushPrefEnv(
121 {set: [['dom.ipc.processPriorityManager.backgroundGracePeriodMS',
122 priorityChangeGracePeriod],
123 ['dom.wakelock.enabled', true]]},
124 runTest);
125 });
127 </script>
128 </body>
129 </html>
