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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 09:22:09 +0000 |
| commit | 43a97878ce14b72f0981164f87f2e35e14151312 (patch) | |
| tree | 620249daf56c0258faa40cbdcf9cfba06de2a846 /testing/web-platform/tests/largest-contentful-paint/observe-css-generated-text.html | |
| parent | Initial commit. (diff) | |
| download | firefox-43a97878ce14b72f0981164f87f2e35e14151312.tar.xz firefox-43a97878ce14b72f0981164f87f2e35e14151312.zip | |
Adding upstream version 110.0.1.upstream/110.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'testing/web-platform/tests/largest-contentful-paint/observe-css-generated-text.html')
| -rw-r--r-- | testing/web-platform/tests/largest-contentful-paint/observe-css-generated-text.html | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/testing/web-platform/tests/largest-contentful-paint/observe-css-generated-text.html b/testing/web-platform/tests/largest-contentful-paint/observe-css-generated-text.html new file mode 100644 index 0000000000..d4f10fb6ba --- /dev/null +++ b/testing/web-platform/tests/largest-contentful-paint/observe-css-generated-text.html @@ -0,0 +1,87 @@ +<!doctype html> +<meta charset=utf-8> +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> +<style> + #css-generated-text::before { + content: 'This is some text generated via css'; + font-size: 12px; + } + + #css-generated-text-attr::before { + content: attr(data-text); + font-size: 12px; + } + + #css-generated-text-inline-elem::before { + content: 'This is some more text generated via css that should be displayed via a span tag'; + font-size: 12px; + } +</style> +<body> + <script> + const checkText = (entry, expectedSize, expectedID, beforeRender) => { + assert_equals(entry.entryType, 'largest-contentful-paint', + 'Entry should be of type largest-contentful-paint'); + assert_greater_than_equal(entry.renderTime, beforeRender, + 'Render time should be greater than time just before rendering'); + assert_greater_than_equal(performance.now(), entry.renderTime, + 'renderTime should be less than current time'); + assert_approx_equals(entry.startTime, entry.renderTime, 0.001, + 'startTime should be equal to renderTime to the precision of 1 millisecond.'); + assert_equals(entry.duration, 0, 'duration should be 0'); + assert_greater_than_equal(entry.size, expectedSize, + 'Size should match expected size'); + assert_equals(entry.loadTime, 0, 'loadTime should be zero'); + assert_equals(entry.id, expectedID, 'ID should match expected ID'); + assert_equals(entry.url, '', 'URL should be empty'); + assert_equals(entry.element, document.getElementById(expectedID), + 'Entry element is expected element'); + } + + const runTest = (element, testName) => { + const elementId = element.id; + // The element should be atleast 12px in width + // and 100px across based on font size and text length. + const elemSizeLowerBound = 1200; + promise_test(t => { + return new Promise((resolve, reject) => { + assert_implements(window.LargestContentfulPaint, + "LargestContentfulPaint is not implemented"); + const observer = new PerformanceObserver(resolve); + observer.observe({ type: 'largest-contentful-paint' }); + beforeRender = performance.now(); + document.body.appendChild(element); + + step_timeout(() => { + reject(new Error('timeout, LCP candidate not detected')); + }, 1000) + }).then(entryList => { + assert_equals(entryList.getEntries().length, 1); + const entry = entryList.getEntries()[0]; + checkText(entry, elemSizeLowerBound, elementId, beforeRender); + }); + }, testName); + } + + const cssGeneratedTextElem = document.createElement('p'); + cssGeneratedTextElem.id = 'css-generated-text'; + runTest(cssGeneratedTextElem, + "CSS generated text is observable as a LargestContentfulPaint candidate"); + + const cssGeneratedTextAttrElem = document.createElement('p'); + cssGeneratedTextAttrElem.id = 'css-generated-text-attr'; + cssGeneratedTextAttrElem.setAttribute('data-text', + 'This is some text generated using content:attr() via css'); + runTest(cssGeneratedTextAttrElem, + "Text generated with CSS using content:attr() is observable as a LargestContentfulPaint candidate"); + + const cssGeneratedTextAttrInlineElemBlockWrapper = document.createElement('div'); + cssGeneratedTextAttrInlineElemBlockWrapper.id = 'css-generated-text-inline-elem-block-wrapper'; + const cssGeneratedTextInlineElem = document.createElement('span'); + cssGeneratedTextInlineElem.id = 'css-generated-text-inline-elem'; + cssGeneratedTextAttrInlineElemBlockWrapper.appendChild(cssGeneratedTextInlineElem); + runTest(cssGeneratedTextAttrInlineElemBlockWrapper, + "CSS generated text on a inline element is observable as a LargestContentfulPaint candidate"); + </script> +</body> |