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Test Info:

<meta charset="utf-8" />
<title>This test validates LargestContentfulPaint for same-origin redirect chain.</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/largest-contentful-paint-helpers.js"></script>
async_test(t => {
assert_implements(window.LargestContentfulPaint, "LargestContentfulPaint is not implemented");
// First redirect
let destUrl = '/common/'
// Second redirect
destUrl += '/common/'
// Image without TAO headers.
destUrl += '/element-timing/resources/square20.png';
let beforeLoad;
new PerformanceObserver(t.step_func_done(entries => {
assert_equals(entries.getEntries().length, 1, 'There should be one entry');
const entry = entries.getEntries()[0];
checkImage(entry, location.origin + destUrl, 'id', 20*20, beforeLoad);
})).observe({entryTypes: ['largest-contentful-paint']});
const image = document.createElement('img');
image.src = destUrl;
image.setAttribute('id', 'id')
beforeLoad =;
}, 'Same-origin image redirect without TAO should have its renderTime set.');