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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
| commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
| tree | f435a8308119effd964b339f76abb83a57c29483 /testing/web-platform/tests/largest-contentful-paint/broken-image-icon.html | |
| parent | Initial commit. (diff) | |
| download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip | |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'testing/web-platform/tests/largest-contentful-paint/broken-image-icon.html')
| -rw-r--r-- | testing/web-platform/tests/largest-contentful-paint/broken-image-icon.html | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/testing/web-platform/tests/largest-contentful-paint/broken-image-icon.html b/testing/web-platform/tests/largest-contentful-paint/broken-image-icon.html new file mode 100644 index 0000000000..be27e34e6a --- /dev/null +++ b/testing/web-platform/tests/largest-contentful-paint/broken-image-icon.html @@ -0,0 +1,45 @@ +<!DOCTYPE html> +<html> + +<head> + <title>Broken Image Icon Should Not Be LCP</title> + <script src="/resources/testharness.js"></script> + <script src="/resources/testharnessreport.js"></script> +</head> + +<body> + <img src="../non-existent-image.jpg"> + <img src="/css/css-images/support/colors-16x8.png"> + + <script> + promise_test(async () => { + // Wait for the first-contentful-paint entry so that we know the broken image + // icon has been painted. + await new Promise(resolve => { + new PerformanceObserver((entryList, observer) => { + if (entryList.getEntriesByName('first-contentful-paint').length > 0) { + observer.disconnect(); + resolve(); + } + }).observe({ type: 'paint', buffered: true }); + }); + + // There should be only 1 LCP entry and it should be the colors-16x8.png though + // being smaller than the broken image icon. The broken image icon should not + // emit an LCP entry. + let LcpEntryListLength = await new Promise(resolve => { + new PerformanceObserver((entryList, observer) => { + if (entryList.getEntries().filter(e => e.url.includes('colors-16x8.png'))) { + observer.disconnect(); + resolve(entryList.getEntries().length); + } + }).observe({ type: 'largest-contentful-paint', buffered: true }); + }); + + assert_equals(LcpEntryListLength, 1, 'There should be one and only one LCP entry.'); + + }, "The broken image icon should not emit an LCP entry."); + </script> +</body> + +</html>
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