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DOCTYPE html>
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html>
<
head>
<
meta charset=
"UTF-8">
<
title>Test Behavior During Timer Flood</
title>
<
script src=
"/tests/SimpleTest/SimpleTest.js"></
script>
<
link rel=
"stylesheet" type=
"text/css" href=
"/tests/SimpleTest/test.css"/>
</
head>
<
body>
<p id=
"display"></p>
<
div id=
"content" style=
"display: none">
</
div>
<
pre id=
"test">
<
script type=
"application/javascript">
SimpleTest.waitForExplicitFinish();
// This test takes a long
time to run and it times out on Android debug as a result.
SimpleTest.requestLongerTimeout(5);
function onLoad() {
return new Promise(resolve => {
addEventListener(
'load', resolve, { once: true });
});
}
// Create a
frame that executes a timer flood. The
frame signals
// that is ready once the flood has had a chance to warm up.
function withFloodFrame() {
return new Promise(resolve => {
let
frame = document.createElement(
'iframe');
addEventListener(
'message', function onMsg(evt) {
if (evt.data ===
'STARTED') {
removeEventListener(
'message', onMsg);
resolve(
frame);
}
});
frame.src =
'file_timer_flood.html';
document.
body.appendChild(
frame);
});
}
// Test that we can load documents during a timer flood.
function testFrameLoad() {
return new Promise(resolve => {
let
frame = document.createElement(
'iframe');
frame.addEventListener(
'load', _ => {
frame.remove();
resolve();
}, { once: true });
document.
body.appendChild(
frame);
});
}
// Test that we can perform network requests while a timer flood
// is occuring.
function testFetch(url) {
return fetch(url).then(response => {
return response.text();
});
}
// Test that we can run animations for 5 seconds while a timer
// flood is occuring.
function testRequestAnimationFrame() {
return new Promise(resolve => {
let remainingFrames = 5 * 60;
function nextFrame() {
remainingFrames -= 1;
if (remainingFrames > 0) {
requestAnimationFrame(nextFrame);
} else {
resolve();
}
};
requestAnimationFrame(nextFrame);
});
}
let floodFrame;
onLoad().then(_ => {
// Start a timer flood in a
frame.
return withFloodFrame();
}).then(
frame => {
floodFrame =
frame;
// Next we are going to start a bunch of asynchronous work that we
// expect to complete in spite of the timer flood. The type of work
// is a bit arbitrary, but is chosen to reflect the kinds of things
// we would like the browser to be able to do even when pages are
// abusing timers. Feel free to add more types of work here, but
// think carefully before removing anything.
let tests = [];
// Verify we can perform a variety of work while the timer flood
// is running.
for (let i = 0; i < 20; ++i) {
tests.push(testFrameLoad());
tests.push(testFetch(
'file_timer_flood.html'));
}
// Verify that animations still work while the timer flood is running.
// Note that we do one long run of animations instead of parallel runs
// like the other activities because of the way requestAnimationFrame()
// is scheduled. Parallel animations would not result in any additional
// runnables be placed on the event queue.
tests.push(testRequestAnimationFrame());
// Wait for all tests to finish. If we do not handle the timer flood
// well then this will likely
time out.
return Promise.all(tests);
}).then(_ => {
ok(true,
'completed tests without timing out');
floodFrame.remove();
SimpleTest.finish();
});
</
script>
</
pre>
</
body>
</
html>
