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Diffstat (limited to 'testing/web-platform/tests/paint-timing/with-first-paint/first-contentful-image.html')
-rw-r--r-- | testing/web-platform/tests/paint-timing/with-first-paint/first-contentful-image.html | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/testing/web-platform/tests/paint-timing/with-first-paint/first-contentful-image.html b/testing/web-platform/tests/paint-timing/with-first-paint/first-contentful-image.html new file mode 100644 index 0000000000..504a07dd43 --- /dev/null +++ b/testing/web-platform/tests/paint-timing/with-first-paint/first-contentful-image.html @@ -0,0 +1,42 @@ +<!DOCTYPE html> +<head> +<title>Performance Paint Timing Test: FCP due to image</title> +</head> +<body> +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> +<div id="image"></div> + +<script> +setup({"hide_test_state": true}); +async_test(function (t) { + assert_implements(window.PerformancePaintTiming, "Paint Timing isn't supported."); + const img = document.createElement("IMG"); + img.src = "../resources/circles.png"; + img.onload = function() { + function testPaintEntries() { + const bufferedEntries = performance.getEntriesByType('paint'); + if (bufferedEntries.length < 2) { + t.step_timeout(function() { + testPaintEntries(); + }, 20); + return; + } + t.step(function() { + assert_equals(bufferedEntries.length, 2, "There should be two paint timing instances."); + assert_equals(bufferedEntries[0].entryType, "paint"); + assert_equals(bufferedEntries[0].name, "first-paint"); + assert_equals(bufferedEntries[1].entryType, "paint"); + assert_equals(bufferedEntries[1].name, "first-contentful-paint"); + t.done(); + }) + } + t.step(function() { + testPaintEntries(); + }); + }; + document.getElementById('image').appendChild(img); +}, "First contentful paint fires due to image render."); +</script> +</body> +</html> |