<!doctype html>
<html>
<title>This test verifies a video element of data uri src triggers an LCP entry
  to be emitted</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<body>
  <script>
    const get_lcp_entry = () => {
      return new Promise(resolve => {
        new PerformanceObserver((list, observer) => {
          if (list.getEntries()) {
            observer.disconnect();
            resolve(list.getEntries()[0]);
          }
        }).observe({ type: "largest-contentful-paint", buffered: true });
      });
    };

    promise_test(async t => {
      lcpEntry = await get_lcp_entry();
      assert_true(lcpEntry.url.startsWith('data:video/mp4;base64,T2dnUwAC'));
    }, "Video of data URI src should trigger an LCP entry to be emitted.")
  </script>
  <!--
    This is the base64 encoding of the images/pattern.ogv video file.
  -->
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