59 lines
2.5 KiB
HTML
59 lines
2.5 KiB
HTML
<!DOCTYPE HTML>
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<meta charset=utf-8>
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<title>Largest Contentful Paint: observe cross origin images with various Timing-Allow-Origin headers</title>
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<body>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="resources/largest-contentful-paint-helpers.js"></script>
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<div id='my_div'></div>
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<script>
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setup({"hide_test_state": true});
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async_test(t => {
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assert_implements(window.LargestContentfulPaint, "LargestContentfulPaint is not implemented");
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const remote_img = 'http://{{domains[www]}}:{{ports[http][1]}}/element-timing/resources/TAOImage.py?'
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+ 'origin=' + window.location.origin +'&tao=';
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const valid_tao = ['wildcard', 'origin', 'multi', 'multi_wildcard', 'match_origin', 'match_wildcard'];
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const invalid_tao = ['null', 'space', 'uppercase'];
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const div = document.getElementById('my_div');
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let img_length = 20;
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function addImage(tao) {
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const img = document.createElement('img');
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img.src = remote_img + tao;
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img.id = tao;
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// Set increasing size so that largest-contentful-paint captures all of them.
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img_length++;
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img.height = img_length;
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img.width = img_length;
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div.appendChild(img);
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}
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let img_count = 0;
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const total_images = valid_tao.length + invalid_tao.length;
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let beforeLoad;
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new PerformanceObserver(
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t.step_func(entryList => {
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assert_equals(entryList.getEntries().length, 1);
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const entry = entryList.getEntries()[0];
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const tao = entry.id;
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const url = remote_img + tao;
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const size = img_length * img_length;
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let options = valid_tao.includes(tao) ? [] : ['renderTimeIs0'];
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checkImage(entry, url, tao, size, beforeLoad, options);
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img_count++;
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beforeLoad = performance.now();
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// Process valid TAO images first.
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if (img_count < valid_tao.length)
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addImage(valid_tao[img_count]);
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// Then add invalid TAO images.
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else if (img_count < total_images)
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addImage(invalid_tao[img_count - valid_tao.length]);
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// Once we've seen all the images, end the test.
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else
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t.done();
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})
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).observe({type: 'largest-contentful-paint'});
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// Add first image, the rest will be added on each observer callback.
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addImage(valid_tao[0]);
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beforeLoad = performance.now();
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}, 'Cross-origin elements with valid TAO have correct renderTime, with invalid TAO have renderTime set to 0.');
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</script>
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</body>
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