| <!DOCTYPE html><!-- webkit-test-runner [ experimental:RequestIdleCallbackEnabled=true ] --> |
| <title>window.requestIdleCallback exists</title> |
| <link rel="author" title="Ross McIlroy" href="mailto:rmcilroy@chromium.org" /> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script> |
| // The window.requestIdleCallback function is used to request callbacks during browser-defined idle time. |
| test(function() { |
| assert_equals(typeof window.requestIdleCallback, "function"); |
| }, "window.requestIdleCallback is defined"); |
| |
| // The window.cancelIdleCallback function is used to cancel callbacks scheduled via requestIdleCallback. |
| test(function() { |
| assert_equals(typeof window.cancelIdleCallback, "function"); |
| }, "window.cancelIdleCallback is defined"); |
| |
| // The requestIdleCallback method MUST return a long |
| test(function() { |
| assert_equals(typeof window.requestIdleCallback(function() {}), "number"); |
| }, "window.requestIdleCallback() returns a number"); |
| |
| // The cancelIdleCallback method MUST return void |
| test(function() { |
| assert_equals(typeof window.cancelIdleCallback(1), "undefined"); |
| }, "window.cancelIdleCallback() returns undefined"); |
| |
| async_test(function() { |
| // Check whether requestIdleCallback schedules a callback which gets executed |
| // and the deadline argument is passed correctly. |
| requestIdleCallback(this.step_func_done(function(deadline) { |
| assert_equals(arguments.length, 1, "Only one argument should be passed to callback."); |
| assert_class_string(deadline, "IdleDeadline"); |
| 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"); |
| })); |
| }, '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); |
| step_timeout(this.step_func_done(), 200); |
| }, 'cancelIdleCallback cancels callbacks'); |
| |
| </script> |
| <h1>Basic requestIdleCallback Tests</h1> |
| <div id="log"></div> |
