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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/element-timing/first-letter-background.html | |
| parent | Initial commit. (diff) | |
| download | firefox-upstream.tar.xz firefox-upstream.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/element-timing/first-letter-background.html')
| -rw-r--r-- | testing/web-platform/tests/element-timing/first-letter-background.html | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/testing/web-platform/tests/element-timing/first-letter-background.html b/testing/web-platform/tests/element-timing/first-letter-background.html new file mode 100644 index 0000000000..f05f2f9223 --- /dev/null +++ b/testing/web-platform/tests/element-timing/first-letter-background.html @@ -0,0 +1,57 @@ +<!DOCTYPE HTML> +<meta charset=utf-8> +<title>Element Timing: observe element with background image in its first letter</title> +<body> +<style> +#target::first-letter { + background-image: url('/images/black-rectangle.png'); +} +#target { + font-size: 12px; +} +</style> +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> +<script src="resources/element-timing-helpers.js"></script> +<script> + let beforeRender = performance.now(); + async_test(function (t) { + assert_implements(window.PerformanceElementTiming, "PerformanceElementTiming is not implemented"); + const div = document.getElementById('target'); + let textObserved = false; + let imageObserved = false; + function calculateSize(entry) { + const ir = entry.intersectionRect; + return (ir.right - ir.left) * (ir.bottom - ir.top); + } + const observer = new PerformanceObserver( + t.step_func(function(entryList) { + entryList.getEntries().forEach(entry => { + if (entry.name === 'text-paint') { + checkTextElement(entry, 'my_div', 'target', beforeRender, div); + textObserved = true; + const size = calculateSize(entry); + // Assume average width is between 4px and 15px. + // Therefore, text size must be between 12 * (35*4) and 12 * (35*15). + assert_between_inclusive(size, 1680, 6300); + } + else { + assert_equals(entry.name, 'image-paint'); + const pathname = window.location.origin + '/images/black-rectangle.png'; + checkElement(entry, pathname, 'my_div', 'target', beforeRender, div); + checkNaturalSize(entry, 100, 50); + imageObserved = true; + const size = calculateSize(entry); + // Background image size should only be approximately the size of a single letter. + assert_between_inclusive(size, 48, 180); + } + }); + if (textObserved && imageObserved) + t.done(); + }) + ); + observer.observe({entryTypes: ['element']}); + }, 'Element with elementtiming attribute and background image in first-letter is observable.'); +</script> +<div id='target' elementtiming='my_div'>This is some text that I care about</div> +</body> |