| <!DOCTYPE html> |
| <title>window.requestIdleCallback exists</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> |
| test(function() { |
| assert_equals(typeof window.requestIdleCallback, "function"); |
| }, "window.requestIdleCallback is defined", {assert: "The window.requestIdleCallback function is used to request callbacks during browser-defined idle time."}); |
| |
| test(function() { |
| assert_equals(typeof window.cancelIdleCallback, "function"); |
| }, "window.cancelIdleCallback is defined", {assert: "The window.cancelIdleCallback function is used to cancel callbacks scheduled via requestIdleCallback."}); |
| |
| test(function() { |
| assert_equals(typeof window.requestIdleCallback(function() {}), "number"); |
| }, "window.requestIdleCallback() returns a number", {assert: "The requestIdleCallback method MUST return a long"}); |
| |
| test(function() { |
| assert_equals(typeof window.cancelIdleCallback(1), "undefined"); |
| }, "window.cancelIdleCallback() returns undefined", {assert: "The cancelIdleCallback method MUST return void"}); |
| |
| test(function() { |
| assert_equals(typeof window.cancelIdleCallback(-1), "undefined"); |
| assert_equals(typeof window.cancelIdleCallback(0), "undefined"); |
| }, "window.cancelIdleCallback() returns undefined for unmapped IDs", {assert: "The cancelIdleCallback method MUST return void"}); |
| |
| async_test(function() { |
| // Check whether requestIdleCallback schedules a callback which gets executed |
| // and the deadline argument is passed correctly. |
| requestIdleCallback(this.step_func(function(deadline) { |
| assert_equals(typeof deadline, "object", "IdleDeadline MUST be passed to callback."); |
| assert_equals(typeof deadline.timeRemaining, "function", "IdleDeadline.timeRemaining MUST be a function which returns the time remaining in milliseconds"); |
| assert_equals(typeof deadline.timeRemaining(), "number", "IdleDeadline.timeRemaining MUST return a double of the time remaining in milliseconds"); |
| assert_true(deadline.timeRemaining() <= 50, "IdleDeadline.timeRemaining() MUST be less than or equal to 50ms in the future."); |
| assert_equals(typeof deadline.didTimeout, "boolean", "IdleDeadline.didTimeout MUST be a boolean"); |
| assert_false(deadline.didTimeout, "IdleDeadline.didTimeout MUST be false if requestIdleCallback wasn't scheduled due to a timeout"); |
| this.done(); |
| })); |
| }, 'requestIdleCallback schedules callbacks'); |
| |
| async_test(function() { |
| // Check whether requestIdleCallback schedules a callback which gets executed |
| // and the deadline argument is passed correctly. |
| var handle = requestIdleCallback(this.step_func(function(deadline) { |
| assert_unreached("callback should not be called if canceled with cancelIdleCallback"); |
| })); |
| cancelIdleCallback(handle); |
| setTimeout(this.step_func(function() { |
| this.done(); |
| }), 200); |
| }, 'cancelIdleCallback cancels callbacks'); |
| |
| </script> |
| <h1>Description</h1> |
| <p>This test validates that window.requestIdleCallback and window.cancelIdleCallback exist and are a functions.</p> |
| <div id="log"></div> |
