pointermove-becomes-drag.html

Enable keyboard shortcuts

This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /layout-instability/pointermove-becomes-drag.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>Layout Instability: no shift in pointerdown becoming dragging</title>

<link rel="help" href="https://wicg.github.io/layout-instability/" />

<style>

body { margin: 0; }

#draggable {

  top:50px;

  left:50px;

  width:50px;

  height:50px;

  background-color:blue;

  position:absolute

</style>

<div id="draggable" ></div>

<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>

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

<script>

const draggable = document.getElementById("draggable");

draggable.addEventListener('touchmove', function(event) {

  let touch = event.targetTouches[0];

  // Move the element when the finger moves.

  draggable.style.top = touch.pageY - 25 + 'px';

  event.preventDefault();

}, false);

generateTouchDragSequence = () => new test_driver.Actions()

    .addPointer("touch1", "touch")

    .pointerMove(0, 0, {origin: draggable})

    .pointerDown()

    .pointerMove(0, 15, {origin: draggable})

    .pause(100)

    .pointerMove(0, 30, {origin: draggable})

    .pause(100)

    .pointerMove(0, 45, {origin: draggable})

    .pause(100)

    .pointerUp()

    .pause(100);

promise_test(async(test) => {

  const watcher = new ScoreWatcher;

  let eventWatcher = new EventWatcher(test, draggable, ["pointerup"]);

  let donePromise = eventWatcher.wait_for(["pointerup"], { record: 'all' });

  // Wait for the initial render to complete.

  await waitForAnimationFrames(2);

  // Send pointer events for a touch drag.

  await generateTouchDragSequence().send();

  // wait for pointerUp before running the test

  await donePromise;

  // Touch moves which drag the objects should be counted as the excluding inputs

  // for the layout shift.

  assert_greater_than(watcher.score, 0);

  assert_equals(watcher.scoreWithInputExclusion, 0);

}, "No Shift in pointerdown reported when it becomes a touch drag.");

</script>