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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/web-font-styled-text-resize-block.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/web-font-styled-text-resize-block.html')
| -rw-r--r-- | testing/web-platform/tests/largest-contentful-paint/web-font-styled-text-resize-block.html | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/testing/web-platform/tests/largest-contentful-paint/web-font-styled-text-resize-block.html b/testing/web-platform/tests/largest-contentful-paint/web-font-styled-text-resize-block.html new file mode 100644 index 0000000000..572442f2a2 --- /dev/null +++ b/testing/web-platform/tests/largest-contentful-paint/web-font-styled-text-resize-block.html @@ -0,0 +1,57 @@ +<!DOCTYPE html> +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> +<!-- + Web-font styled text that gets resized during block period should not make a + LCP emission. +--> +<style> + @font-face { + font-family: 'ADTestFaceBlock'; + src: url('/fonts/AD.woff'); + font-display: block; + } + + .test { + font-family: 'ADTestFaceBlock'; + } + +</style> +<div class="test">LCP: Web Font Styled Text Resize</div> +<script> + function LCPEntryList(t) { + return new Promise(resolve => { + let = lcpEntries = []; + new PerformanceObserver((entryList, observer) => { + lcpEntries = lcpEntries.concat(entryList.getEntries()); + if (lcpEntries) { + // Adding timeout to wait a bit more so that if there are more than + // expected LCP entries emitted, they can be observed. + t.step_timeout(() => { + resolve(lcpEntries); + observer.disconnect(); + }, 200); + } + }).observe({ type: 'largest-contentful-paint', buffered: true }); + }); + } + + promise_test(async t => { + await document.fonts.ready; + + // Verify web font is downloaded. + assert_own_property(window, 'PerformanceResourceTiming', "ResourceTiming not supported"); + let url = '/fonts/AD.woff'; + var absoluteURL = new URL(url, location.href).href; + assert_equals(performance.getEntriesByName(absoluteURL).length, 1, 'Web font\ + should be downloaded'); + + // Verify web font is available. + assert_true(document.fonts.check('16px ADTestFaceBlock'), 'Font should be the web font added'); + + // Verify there is only one LCP entry. + let entryList = await LCPEntryList(t); + assert_equals(entryList.length, 1, 'Web font styled text resize that occurs during block period should not make a new LCP emission.'); + + }, "LCP should be not updated if the web font styled text resize occurs during the block period."); +</script> |