<!doctype html>
<title>Navigating to a same-document text fragment directive</title>
<meta charset=utf-8>
<link rel="help" href="https://wicg.github.io/ScrollToTextFragment/">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script>
function isInView(element) {
  let rect = element.getBoundingClientRect();
  return rect.top >= 0 && rect.top <= window.innerHeight;
}

function checkScroll(resolve) {
  let position = 'unknown';
  requestAnimationFrame(() => {
    if (window.scrollY == 0)
      position = 'top';
    else if (isInView(document.getElementById('text')))
      position = 'text';
    resolve(position);
  });
}

function reset() {
  window.location.hash = "";
  window.scrollTo(0, 0);
}

function runTest() {
  promise_test(t => new Promise(resolve => {
    reset();
    window.location.href = "#:~:text=test";
    requestAnimationFrame(function() {
      checkScroll(resolve);
    });
  }).then(position => {
    assert_equals(position, 'text');
    assert_equals(window.location.href.indexOf(':~:'), -1, 'Expected fragment directive to be stripped from the URL.');
  }), 'Activated for same-document window.location setter');

  promise_test(t => new Promise(resolve => {
    reset();
    window.location.replace("#:~:text=test");
    requestAnimationFrame(function() {
      checkScroll(resolve);
    });
  }).then(position => {
    assert_equals(position, 'text');
    assert_equals(window.location.href.indexOf(':~:'), -1, 'Expected fragment directive to be stripped from the URL.');
  }), 'Activated for same-document window.location.replace');
}
</script>
<style>
  body {
    height: 3200px;
  }
  #text {
    position: absolute;
    top: 3000px;
  }
</style>
<body onload="runTest()">
  <p id="text">This is a test page</p>
</body>
