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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/update-on-style-change.tentative.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/update-on-style-change.tentative.html')
| -rw-r--r-- | testing/web-platform/tests/largest-contentful-paint/update-on-style-change.tentative.html | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/testing/web-platform/tests/largest-contentful-paint/update-on-style-change.tentative.html b/testing/web-platform/tests/largest-contentful-paint/update-on-style-change.tentative.html new file mode 100644 index 0000000000..dd34e61b0f --- /dev/null +++ b/testing/web-platform/tests/largest-contentful-paint/update-on-style-change.tentative.html @@ -0,0 +1,38 @@ +<!DOCTYPE html> +<meta charset="utf-8"> +<title>LargestContentfulPaint entries should generate for updates to previous LargestContentfulPaint nodes.</title> +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> + +<body> + <script> + promise_test(() => { + assert_implements(window.LargestContentfulPaint, "LargestContentfulPaint is not implemented"); + let countLcp = 0; + let firstLcp = null; + const timeoutPromise = new Promise(resolve => step_timeout(() => { + resolve(new Error('Did not observe two LCP entries')) + }, 3 * 1000)); + const testPromise = new Promise(resolve => { + new PerformanceObserver(list => { + const entries = list.getEntries(); + for (const entry of entries) { + ++countLcp; + assert_equals(entry.entryType, 'largest-contentful-paint'); + assert_equals(entry.id, 'text'); + if (countLcp == 1) { + firstLcp = entry; + } else if (countLcp == 2) { + assert_more_than(entry.startTime, firstLcp.startTime); + assert_more_than(entry.size, firstLcp.size); + resolve(); + } + } + }).observe({ entryTypes: ['largest-contentful-paint'] }); + }); + return Promise.race([timeoutPromise, testPromise]); + }) + </script> + <div id="text">text</div> + <link rel="stylesheet" href="/resources/slow-style-change.py"> +</body> |