helper_initial_zero_vector_touch_events.html

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<!DOCTYPE HTML>

<html>

<head>

  <meta charset="utf-8">

  <meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1">

  <title>Test that zero vector initial touch-move doesn't lock scroll axis</title>

  <script type="application/javascript" src="apz_test_native_event_utils.js"></script>

  <script type="application/javascript" src="apz_test_utils.js"></script>

  <script src="/tests/SimpleTest/paint_listener.js"></script>

</head>

<!-- scrollable in both directions -->

<body style="height:2000vh; width: 2000vw;">

</body>

<script type="application/javascript">

async function test() {

  let scrollEventPromise = waitForScrollEvent(window);

  await synthesizeNativeTouch(window, 100, 200,

                              SpecialPowers.DOMWindowUtils.TOUCH_CONTACT);

  await synthesizeNativeTouch(window, 100, 200,

                              SpecialPowers.DOMWindowUtils.TOUCH_CONTACT);

  await synthesizeNativeTouch(window, 100, 150,

                              SpecialPowers.DOMWindowUtils.TOUCH_CONTACT);

  await synthesizeNativeTouch(window, 100, 100,

                              SpecialPowers.DOMWindowUtils.TOUCH_CONTACT);

  await synthesizeNativeTouch(window, 100, 100,

                              SpecialPowers.DOMWindowUtils.TOUCH_REMOVE);

  await scrollEventPromise;

  ok(window.scrollY > 0, "A zero-vector initial touch-move should not prevent subsequent touch-moves from scrolling");

waitUntilApzStable()

.then(test)

.then(subtestDone, subtestFailed);

</script>

</html>