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<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=1637135
-->
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=400px">
  <title>Test for Bug 1637135</title>
  <script src="/tests/SimpleTest/paint_listener.js"></script>
  <script src="/tests/SimpleTest/EventUtils.js"></script>
  <script type="application/javascript" src="apz_test_native_event_utils.js"></script>
  <script type="application/javascript" src="apz_test_utils.js"></script>
  <style>
    #target {
      margin-left: 450px;
      width: 100px;
      height: 100px;
    }
  </style>
</head>
<body>
  <div id="target">
  <script type="application/javascript">

async function test() {
  // Tap the target element, which is located beyond x=400.
  // The bug occurs when we cannot hit it because the viewport
  // width of x=400 causes us to be unable to hit elements
  // beyond that point.
  let target = document.getElementById("target");
  let mouseDownEvent = null;
  let mouseDownPromise = new Promise(resolve => {
    target.addEventListener("mousedown", function(e) {
      mouseDownEvent = e;
      resolve();
    });
  });

  synthesizeNativeTap(target, 10, 10);
  await mouseDownPromise;

  is(mouseDownEvent.target, target, "mousedown event targeted the correct element");
}

if (getPlatform() == "android") {
  waitUntilApzStable()
  .then(test)
  .then(subtestDone, subtestFailed);
} else {
  // The fix for bug 1637135 is limited to Android, because
  // it breaks the ability to target scrollbars, so we can
  // only run this test on Android.
  ok(true, "This subtest is only run on Android");
  subtestDone();
}

  </script>
</body>
</html>