<!doctype html>
<meta charset=utf-8>
<title>Test focus event after focusing iframe</title>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script>
function waitForEvent(target, event, checkFn) {
  return new Promise(resolve => {
    target.addEventListener(event, e => {
      if (checkFn && !checkFn(e)) {
        return;
      }
      resolve();
    }, { once: true });
  });
}

function start(w) {
  w.postMessage("start", "*");
}

function focusIframe(w) {
  w.postMessage("focus", "*");
}

// This will send message to outer frame and also inner frame to ask them
// send the log they collect back, the logs of outer and inner will be
// concatenated.
async function getLog(w) {
  let log = "";
  step_timeout(function() {
    w.postMessage("getlog", "*");
  }, 0);
  await waitForEvent(window, "message", (e) => {
    log = e.data;
    return true;
  });
  return log;
}

async function runTest(t, url) {
  let w = window.open(url);
  t.add_cleanup(() => { w.close(); });
  await waitForEvent(window, "message", e => e.data === "ready");
  start(w);
  focusIframe(w);
  assert_equals(await getLog(w), 'outerlog:willfocusiframe,windowblur,didfocusiframe,innerlog:windowfocus,');
  focusIframe(w);
  assert_equals(await getLog(w), 'outerlog:willfocusiframe,windowblur,didfocusiframe,willfocusiframe,didfocusiframe,innerlog:windowfocus,');
}

promise_test(async t => {
  await runTest(t, "support/focus-event-after-focusing-different-site-iframes-outer.sub.html");
}, "Check focus event after focusing different site iframe");

promise_test(async t => {
  await runTest(t, "support/focus-event-after-focusing-same-site-iframes-outer.html");
}, "Check focus event after focusing same site iframe");

</script>
