From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 02:47:55 +0200 Subject: Adding upstream version 124.0.1. Signed-off-by: Daniel Baumann --- .../with-first-paint/buffered-flag.window.js | 36 ++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 testing/web-platform/tests/paint-timing/with-first-paint/buffered-flag.window.js (limited to 'testing/web-platform/tests/paint-timing/with-first-paint/buffered-flag.window.js') diff --git a/testing/web-platform/tests/paint-timing/with-first-paint/buffered-flag.window.js b/testing/web-platform/tests/paint-timing/with-first-paint/buffered-flag.window.js new file mode 100644 index 0000000000..0b7c8bea2e --- /dev/null +++ b/testing/web-platform/tests/paint-timing/with-first-paint/buffered-flag.window.js @@ -0,0 +1,36 @@ +setup({"hide_test_state": true}); +async_test(t => { + assert_implements(window.PerformancePaintTiming, "Paint Timing isn't supported."); + // First observer creates second in callback to ensure the entry has been dispatched by the time + // the second observer begins observing. + let entries_seen = 0; + new PerformanceObserver(firstList => { + entries_seen += firstList.getEntries().length; + // Abort if we have not yet received both paint entries. + if (entries_seen < 2) + return; + + // Second observer requires 'buffered: true' to see the entries. + let firstPaintSeen = false; + let firstContentfulPaintSeen = false; + new PerformanceObserver(list => { + list.getEntries().forEach(t.step_func(entry => { + assert_equals(entry.entryType, 'paint'); + if (entry.name === 'first-paint') + firstPaintSeen = true; + else if (entry.name === 'first-contentful-paint') + firstContentfulPaintSeen = true; + else + assert_unreached('The observer should only see first paint or first contentful paint!'); + + if (firstPaintSeen && firstContentfulPaintSeen) + t.done(); + })); + }).observe({'type': 'paint', buffered: true}); + }).observe({'entryTypes': ['paint']}); + + // Trigger the first paint entries + const img = document.createElement("IMG"); + img.src = "resources/circles.png"; + document.body.appendChild(img); +}, "PerformanceObserver with buffered flag sees previous paint entries."); -- cgit v1.2.3