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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
| commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
| tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /testing/web-platform/tests/largest-contentful-paint/placeholder-image.html | |
| parent | Initial commit. (diff) | |
| download | thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip | |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'testing/web-platform/tests/largest-contentful-paint/placeholder-image.html')
| -rw-r--r-- | testing/web-platform/tests/largest-contentful-paint/placeholder-image.html | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/testing/web-platform/tests/largest-contentful-paint/placeholder-image.html b/testing/web-platform/tests/largest-contentful-paint/placeholder-image.html new file mode 100644 index 0000000000..6a2ce5c7c6 --- /dev/null +++ b/testing/web-platform/tests/largest-contentful-paint/placeholder-image.html @@ -0,0 +1,31 @@ +<!DOCTYPE HTML> +<meta charset=utf-8> +<title>Largest Contentful Paint: src change triggers new entry.</title> +<body> +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> +<script src="resources/largest-contentful-paint-helpers.js"></script> +<img src='/images/green-1x1.png' id='image_id' width="133" height="106"/> +<script> + async_test(function (t) { + assert_implements(window.LargestContentfulPaint, "LargestContentfulPaint is not implemented"); + let beforeLoad = performance.now(); + document.getElementById('image_id').src = '/images/blue.png'; + const url = window.location.origin + '/images/blue.png'; + const observer = new PerformanceObserver( + t.step_func(function(entryList) { + let entries = entryList.getEntries().filter(e => e.url === url); + if (entries.length === 0) + return; + assert_equals(entries.length, 1); + const entry = entries[0]; + // blue.png is 133 by 106. + const size = 133 * 106; + checkImage(entry, url, 'image_id', size, beforeLoad); + t.done(); + }) + ); + observer.observe({type: 'largest-contentful-paint', buffered: true}); + }, 'Largest Contentful Paint: changing src causes a new entry to be dispatched.'); +</script> +</body> |