blob: 8edabe51a6bb6890bfb78baa925bca76eb05ce96 [file] [log] [blame]
<!DOCTYPE html>
<title>window.requestIdleCallback callback behavior during long idle periods.</title>
<link rel="author" title="Ross McIlroy" href="mailto:rmcilroy@chromium.org" />
<link rel="help" href="http://www.w3.org/TR/requestidlecallback/"/>
<script src="../../../../resources/testharness.js"></script>
<script src="../../../../resources/testharnessreport.js"></script>
<link rel="stylesheet" href="../../../..//resources/testharness.css" />
<script>
async_test(function() {
// Check that a new idle callback runs after the deadline of a previous one.
// This test is similar to one in idle_periods.html, but uses completely
// idle renderer and doesn't run requestAnimationFrame. This test lives
// in a separate file for isolation (if rAF is requested, renderer will
// become non-idle for all tests.
var previous_deadline;
var idle_callbacks_remaining = 5;
var self = this;
requestIdleCallback(this.step_func(function rIC(deadline) {
var remaining = deadline.timeRemaining();
var now = performance.now();
if (previous_deadline != undefined) {
assert_true(now >= previous_deadline, "A requestIdleCallback called during an idle period should not be run until the next idle period.");
}
// Schedule a new requestIdleCallback.
if (--idle_callbacks_remaining > 0) {
previous_deadline = now + remaining;
requestIdleCallback(rIC);
} else {
self.done();
}
}));
}, 'Check that if a new idle callback runs after a deadline for a previous one during long idle period.');
</script>
<h1>Description</h1>
<p>This test validates that window.requestIdleCallback deals with callbacks during long idle periods correctly.</p>
<div id="log"></div>