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| (Empty) | |
| 1 <!DOCTYPE html> |
| 2 <title>window.requestIdleCallback deals with timeouts correctly</title> |
| 3 <link rel="author" title="Ross McIlroy" href="mailto:rmcilroy@chromium.org" /> |
| 4 <script src="/resources/testharness.js"></script> |
| 5 <script src="/resources/testharnessreport.js"></script> |
| 6 <script> |
| 7 |
| 8 async_test(function() { |
| 9 // Check whether requestIdleCallback with a timeout works when the event loop |
| 10 // is busy. |
| 11 var busy_raf_loop_iterations_remaining = 10; // Should take 20 * 40 = 400ms |
| 12 var idle_callback_scheduled; |
| 13 var idle_callback = this.step_func_done(function(deadline) { |
| 14 assert_false(deadline.didTimeout, "IdleDeadline.didTimeout MUST be false if
requestIdleCallback wasn't scheduled due to a timeout"); |
| 15 assert_equals(busy_raf_loop_iterations_remaining, 0, "Busy rAF loop should b
e finished by the time we get scheduled"); |
| 16 }); |
| 17 |
| 18 var busy_raf_loop_iterations_remaining = 10; // Should take 20 * 40 = 400ms |
| 19 requestAnimationFrame(this.step_func(function busyRAFLoop() { |
| 20 var start_time = performance.now(); |
| 21 if (!idle_callback_scheduled) { |
| 22 idle_callback_scheduled = start_time; |
| 23 requestIdleCallback(idle_callback); |
| 24 } |
| 25 |
| 26 // Use up the whole frame budget. |
| 27 while (performance.now() - start_time < 40) { |
| 28 } |
| 29 if (busy_raf_loop_iterations_remaining > 0) { |
| 30 busy_raf_loop_iterations_remaining--; |
| 31 requestAnimationFrame(busyRAFLoop); |
| 32 } |
| 33 })); |
| 34 }, 'requestIdleCallback not scheduled when event loop is busy.'); |
| 35 |
| 36 async_test(function() { |
| 37 // Check whether requestIdleCallback with a timeout works when the event loop |
| 38 // is busy. |
| 39 var busy_raf_loop_iterations_remaining = 10; // Should take 20 * 40 = 400ms |
| 40 var timeout = 200; |
| 41 var idle_callback_scheduled; |
| 42 var idle_callback = this.step_func_done(function(deadline) { |
| 43 var time_delta = performance.now() - idle_callback_scheduled; |
| 44 assert_true(time_delta >= timeout, "Should only have been run after timeout"
); |
| 45 assert_true(deadline.timeRemaining() == 0, "IdleDeadline.timeRemaining MUST
be equal to zero if requestIdleCallback was scheduled due to a timeout"); |
| 46 assert_true(deadline.didTimeout, "IdleDeadline.didTimeout MUST be true if re
questIdleCallback was scheduled due to a timeout"); |
| 47 assert_true(busy_raf_loop_iterations_remaining > 0, "Busy rAF loop should st
ill be going"); |
| 48 }); |
| 49 |
| 50 requestAnimationFrame(this.step_func(function busyRAFLoop() { |
| 51 var start_time = performance.now(); |
| 52 if (!idle_callback_scheduled) { |
| 53 idle_callback_scheduled = start_time; |
| 54 requestIdleCallback(idle_callback, { timeout: timeout }); |
| 55 } |
| 56 |
| 57 // Use up the whole frame budget. |
| 58 while (performance.now() - start_time < 40) { |
| 59 } |
| 60 if (busy_raf_loop_iterations_remaining > 0) { |
| 61 busy_raf_loop_iterations_remaining--; |
| 62 requestAnimationFrame(busyRAFLoop); |
| 63 } |
| 64 })); |
| 65 }, 'requestIdleCallback scheduled with timeout when event loop is busy.'); |
| 66 |
| 67 </script> |
| 68 <h1>Test of requestIdleCallback timeout behavior</h1> |
| 69 <div id="log"></div> |
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Chromium Code Reviews
Issue 2517743002:
Import wpt@5a1f188e0536ad023936cc62f9a00617299dc192 (Closed)
