source-priority.sub.https.html | Explore in Territory

<!doctype html>
<meta charset=utf-8>
<meta name=timeout content=long>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/attribution-reporting/resources/helpers.js"></script>
<script>
attribution_reporting_promise_test(async t => {
  const host = 'https://{{host}}';

  registerAttributionSrcByImg(createRedirectChain([
    {
      source: {
         destination: host,
         priority: '11',
         source_event_id: '6',
      },
    },
    {
      source: {
         destination: host,
         priority: '13',
         source_event_id: '5',
      },
    },
    {
      source: {
         destination: host,
         priority: '12',
         source_event_id: '4',
      },
    },
    {trigger: {event_trigger_data: [{}]}},
  ]));

  const payload = await pollEventLevelReports();
  assert_equals(payload.reports.length, 1);
  const report = JSON.parse(payload.reports[0].body);
  assert_equals(report.source_event_id, '5');
}, 'Trigger is attributed to highest priority source.');
</script>

chromium/third_party/blink/web_tests/wpt_internal/attribution-reporting/source-priority.sub.https.html