pointerevent_coalesced_movement.https.html

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This WPT test may be referenced by the following Test IDs:
- /pointerevents/pointerevent_coalesced_movement.https.html - WPT Dashboard Interop Dashboard

<!doctype html>

<html>

<head>

<meta charset="utf-8">

<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1753724">

<title>pointermove getCoalescedEvents movementX/Y should add up to main event's movementX/Y</title>

<script src='/resources/testharness.js'></script>

<script src='/resources/testharnessreport.js'></script>

<script src="/resources/testdriver.js"></script>

<script src="/resources/testdriver-actions.js"></script>

<script src="/resources/testdriver-vendor.js"></script>

</head>

<body>

<script>

promise_test(async t => {

  let checks = [];

  function onPointerMove(e) {

      let totalX = 0, totalY = 0;

      for (let coalesced of e.getCoalescedEvents()) {

        totalX += coalesced.movementX;

        totalY += coalesced.movementY;

      checks.push([[totalX, totalY], [e.movementX, e.movementY]]);

  addEventListener('pointermove', onPointerMove);

  t.add_cleanup(() => {

    removeEventListener('pointermove', onPointerMove);

});

  let actions = new test_driver.Actions();

  await actions

    .pointerMove(30, 30)

    .pointerMove(50, 50)

    .send();

  // If we do the assertions in the callback, the output is a bit weird.

  // So we put the results into an array and check them here.

  for (let [got, expected] of checks) {

    assert_array_equals(got, expected,

          'Coalesced event motion should add up to main event motion');

});

</script>

</body>

</html>