third_party/WebKit/LayoutTests/virtual/threaded/fast/idle-callback/basic.html

   1 <!DOCTYPE html>
   2 <title>window.requestIdleCallback exists</title>
   3 <link rel="author" title="Ross McIlroy" href="mailto:rmcilroy@chromium.org" />
   4 <link rel="help" href="http://www.w3.org/TR/requestidlecallback/"/>
   5 <script src="../../../../resources/testharness.js"></script>
   6 <script src="../../../../resources/testharnessreport.js"></script>
   7 <link rel="stylesheet" href="../../resources/testharness.css" />
   8 <script>
   9 test(function() {
  10   assert_equals(typeof window.requestIdleCallback, "function");
  11 }, "window.requestIdleCallback is defined", {assert: "The window.requestIdleCallback function is used to request callbacks during browser-defined idle time."});
  12
  13 test(function() {
  14   assert_equals(typeof window.cancelIdleCallback, "function");
  15 }, "window.cancelIdleCallback is defined", {assert: "The window.cancelIdleCallback function is used to cancel callbacks scheduled via requestIdleCallback."});
  16
  17 test(function() {
  18   assert_equals(typeof window.requestIdleCallback(function() {}), "number");
  19 }, "window.requestIdleCallback() returns a number", {assert: "The requestIdleCallback method MUST return a long"});
  20
  21 test(function() {
  22   assert_equals(typeof window.cancelIdleCallback(1), "undefined");
  23 }, "window.cancelIdleCallback() returns undefined", {assert: "The cancelIdleCallback method MUST return void"});
  24
  25 async_test(function() {
  26   // Check whether requestIdleCallback schedules a callback which gets executed
  27   // and the deadline argument is passed correctly.
  28   requestIdleCallback(this.step_func(function(deadline) {
  29     assert_equals(typeof deadline, "object", "IdleDeadline MUST be passed to callback.");
  30     assert_equals(typeof deadline.timeRemaining, "function", "IdleDeadline.timeRemaining MUST be a function which returns the time remaining in milliseconds");
  31     assert_equals(typeof deadline.timeRemaining(), "number", "IdleDeadline.timeRemaining MUST return a double of the time remaining in milliseconds");
  32     assert_true(deadline.timeRemaining() <= 50, "IdleDeadline.timeRemaining() MUST be less than or equal to 50ms in the future.");
  33     assert_equals(typeof deadline.didTimeout, "boolean", "IdleDeadline.didTimeout MUST be a boolean");
  34     assert_false(deadline.didTimeout, "IdleDeadline.didTimeout MUST be false if requestIdleCallback wasn't scheduled due to a timeout");
  35     this.done();
  36   }));
  37 }, 'requestIdleCallback schedules callbacks');
  38
  39 async_test(function() {
  40   // Check whether requestIdleCallback schedules a callback which gets executed
  41   // and the deadline argument is passed correctly.
  42   var handle = requestIdleCallback(this.step_func(function(deadline) {
  43     assert_unreached("callback should not be called if canceled with cancelIdleCallback");
  44   }));
  45   cancelIdleCallback(handle);
  46   setTimeout(this.step_func(function() {
  47     this.done();
  48   }), 200);
  49 }, 'cancelIdleCallback cancels callbacks');
  50
  51 </script>
  52 <h1>Description</h1>
  53 <p>This test validates that window.requestIdleCallback and window.cancelIdleCallback exist and are a functions.</p>
  54 <div id="log"></div>