| <!DOCTYPE html> |
| <html> |
| <head> |
| <title>time origin value manual test</title> |
| <link rel="help" href="https://w3c.github.io/hr-time/#time-origin-1"> |
| <link rel="prefetch" href="./resources/unload-a.html"> |
| <link rel="prefetch" href="./resources/unload-b.html"> |
| <link rel="prefetch" href="./resources/unload-c.html"> |
| </head> |
| <body> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script> |
| setup({ explicit_timeout: true }); |
| |
| const ACCEPTABLE_VARIANCE = 400; // ms |
| |
| const isRoughlyEqual = (a, b) => Math.abs(a - b) < ACCEPTABLE_VARIANCE; |
| |
| const timings = { a: {}, b: {}, c: {} }; |
| const t = async_test("hr-time time origin"); |
| |
| window.mark = msg => { |
| timings[msg.docName][msg.lifecycleEventName] = { |
| performanceNow: msg.performanceNow, |
| dateNow: msg.dateNow |
| }; |
| |
| if (msg.docName === "c" && msg.lifecycleEventName === "unload") { |
| setTimeout(makeAssertions, 0); |
| } |
| }; |
| |
| function makeAssertions () { |
| t.step(() => { |
| const loadTimeBetweenAandB = timings.b.load.dateNow - timings.a.unload.dateNow; |
| const loadTimeBetweenBandC = timings.c.load.dateNow - timings.b.unload.dateNow; |
| |
| assert_true( |
| isRoughlyEqual(loadTimeBetweenAandB, timings.b.load.performanceNow), |
| "Document in reused window's time origin should be time of close of pop-up box." |
| ); |
| assert_true( |
| isRoughlyEqual(loadTimeBetweenBandC, timings.c.load.performanceNow), |
| "Document in reused window's time origin should be time of close of pop-up box." |
| ); |
| assert_true( |
| !isRoughlyEqual(timings.a.unload.performanceNow, 0), |
| "Time origin during unload event should match that of rest of document." |
| ); |
| assert_true( |
| !isRoughlyEqual(timings.b.unload.performanceNow, 0), |
| "Time origin during unload event should match that of rest of document." |
| ); |
| assert_true( |
| !isRoughlyEqual(timings.c.unload.performanceNow, 0), |
| "Time origin during unload event should match that of rest of document." |
| ); |
| }); |
| t.done(); |
| } |
| </script> |
| |
| <h2>Description</h2> |
| <p>This test validates the behavior of <code>performance.now()</code> with respect to its time origin.</p> |
| <div id="log"> |
| <h2>Manual Test Steps</h2> |
| <ol> |
| <li><a href="resources/unload-a.html" target="_blank">Click here</a> |
| </ol> |
| </div> |
| </body> |
| <html> |
