LayoutTests/requestidlecallback/requestidlecallback-is-not-called-when-canceled.html - WebKit - Git at Google

 <!DOCTYPE html><!-- webkit-test-runner [ RequestIdleCallbackEnabled=true ] -->
 <html>
 <body>
 <script src="../resources/js-test.js"></script>
 <script>

 description('This tests that when requestIdleCallback is enabled, requestIdleCallback is eventaully called in the order.');

 jsTestIsAsync = true;

 const iframe = document.createElement('iframe');
 const logs = [];

 iframe.onload = () => {
     requestIdleCallback(() => {
         logs.push('1.A1');
         iframe.contentWindow.cancelIdleCallback(b1);
     });

     const b1 = iframe.contentWindow.requestIdleCallback(() => logs.push('2.B1'));

     window.a2 = requestIdleCallback(() => logs.push('3.A2'));
     cancelIdleCallback(a2 + 1);
     window.a3 = requestIdleCallback(() => logs.push('4.A3'));
     shouldBe('a3', 'a2 + 1');
 }
 document.body.appendChild(iframe);

 setTimeout(() => {
     shouldBe('logs.length', '3');
     shouldBeEqualToString('logs.join(", ")', '1.A1, 3.A2, 4.A3');
     finishJSTest();
 }, 200);

 </script>
 </body>
 </html>
	<!DOCTYPE html><!-- webkit-test-runner [ RequestIdleCallbackEnabled=true ] -->
	<html>
	<body>
	<script src="../resources/js-test.js"></script>
	<script>

	description('This tests that when requestIdleCallback is enabled, requestIdleCallback is eventaully called in the order.');

	jsTestIsAsync = true;

	const iframe = document.createElement('iframe');
	const logs = [];

	iframe.onload = () => {
	requestIdleCallback(() => {
	logs.push('1.A1');
	iframe.contentWindow.cancelIdleCallback(b1);
	});

	const b1 = iframe.contentWindow.requestIdleCallback(() => logs.push('2.B1'));

	window.a2 = requestIdleCallback(() => logs.push('3.A2'));
	cancelIdleCallback(a2 + 1);
	window.a3 = requestIdleCallback(() => logs.push('4.A3'));
	shouldBe('a3', 'a2 + 1');
	}
	document.body.appendChild(iframe);

	setTimeout(() => {
	shouldBe('logs.length', '3');
	shouldBeEqualToString('logs.join(", ")', '1.A1, 3.A2, 4.A3');
	finishJSTest();
	}, 200);

	</script>
	</body>
	</html>