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<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8" />
<title>This test validates element timing information for cross-origin redirect chain images.</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/element-timing-helpers.js"></script>
<script src=/common/get-host-info.sub.js></script>
</head>
<body>
<script>
async_test(t => {
assert_implements(window.PerformanceElementTiming, "PerformanceElementTiming is not implemented");
let destUrl = get_host_info().HTTP_REMOTE_ORIGIN
+ '/resource-timing/resources/multi_redirect.py?';
destUrl += 'page_origin=' + get_host_info().HTTP_ORIGIN;
destUrl += '&cross_origin=' + get_host_info().HTTP_REMOTE_ORIGIN;
destUrl += '&final_resource=' + '/element-timing/resources/circle-tao.svg';
destUrl += '&timing_allow=1';
destUrl += '&tao_steps=';
for (let taoSteps=0; taoSteps < 4; taoSteps++) {
const image = document.createElement('img');
image.src = destUrl + taoSteps;
image.setAttribute('elementtiming', taoSteps);
image.setAttribute('id', 'id' + taoSteps)
document.body.appendChild(image);
}
let numObserved = 0;
let observedMap = [false, false, false, false];
const beforeRender = performance.now();
new PerformanceObserver(t.step_func(entries => {
entries.getEntries().forEach(entry => {
const taoSteps = entry.identifier;
assert_false(observedMap[taoSteps], 'Should observe each image once');
observedMap[taoSteps] = true;
if (taoSteps !== '3') {
assert_equals(entry.renderTime, 0,
'renderTime should be 0 when there is ' + taoSteps + ' tao steps');
}
const bound = taoSteps === '3' ? beforeRender : 0;
checkElement(entry, destUrl + taoSteps, taoSteps, 'id' + taoSteps, bound,
document.getElementById(taoSteps));
});
numObserved += entries.getEntries().length;
if (numObserved === 4)
t.done();
})).observe({type: 'element', buffered: true});
}, 'Cross-origin image without TAO should not have its renderTime set, with full TAO it should.');
</script>
</body>
</html>
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