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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/progressively-loaded-image.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/element-timing/progressively-loaded-image.html')
| -rw-r--r-- | testing/web-platform/tests/element-timing/progressively-loaded-image.html | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/testing/web-platform/tests/element-timing/progressively-loaded-image.html b/testing/web-platform/tests/element-timing/progressively-loaded-image.html new file mode 100644 index 0000000000..6695d8f9c3 --- /dev/null +++ b/testing/web-platform/tests/element-timing/progressively-loaded-image.html @@ -0,0 +1,40 @@ +<!DOCTYPE html> +<html> +<meta charset=utf-8 /> +<title>Element Timing: buffer elements before onload</title> +<script src=/resources/testharness.js></script> +<script src=/resources/testharnessreport.js></script> +<script src="resources/element-timing-helpers.js"></script> +<body> +<script> + let beforeRender; + let img; + // Number of characters to be read on the initial read, before sleeping. + // Should be sufficient to do at least a first scan. + let numInitial = 75; + let sleep = 500; + async_test(function(t) { + assert_implements(window.PerformanceElementTiming, "PerformanceElementTiming is not implemented"); + const img_src = 'resources/progressive-image.py?name=square20.jpg&numInitial=' + + numInitial + '&sleep=' + sleep; + const observer = new PerformanceObserver( + t.step_func_done(function(entryList) { + assert_equals(entryList.getEntries().length, 1); + const entry = entryList.getEntries()[0]; + const pathname = window.location.origin + '/element-timing/' + img_src; + // Since the image is only fully loaded after the sleep, the render timestamp + // must be greater than |beforeRender| + |sleep|. + checkElement(entry, pathname, 'my_image', '', beforeRender + sleep, img); + checkNaturalSize(entry, 20, 20); + }) + ); + observer.observe({entryTypes: ['element']}); + + img = document.createElement('img'); + img.src = img_src; + img.setAttribute('elementtiming', 'my_image'); + document.body.appendChild(img); + beforeRender = performance.now(); + t.step_timeout(() => {assert_true(0);}, 2000); + }, "Element Timing: image render timestamp occurs after it is fully loaded."); +</script> |