overscroll-event-fired-to-scrolled-element.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /dom/events/scrolling/overscroll-event-fired-to-scrolled-element.html - WPT Dashboard Interop Dashboard

<!DOCTYPE HTML>

<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="scroll_support.js"></script>

<style>

#scrollableDiv {

  width: 200px;

  height: 200px;

  overflow: scroll;

  position: absolute;

  left: 150px;

  top: 150px;

#innerDiv {

  width: 250px;

  height: 250px;

</style>

<body style="margin:0" onload=runTest()>

<div id="scrollableDiv">

  <div id="innerDiv">

  </div>

</div>

</body>

<script>

var scrolling_div = document.getElementById('scrollableDiv');

var overscrolled_x_delta = 0;

var overscrolled_y_delta = 0;

function onOverscroll(event) {

  assert_false(event.cancelable);

  assert_false(event.bubbles);

  overscrolled_x_delta = event.deltaX;

  overscrolled_y_delta = event.deltaY;

scrolling_div.addEventListener("overscroll", onOverscroll);

function runTest() {

  promise_test (async (t) => {

    // Make sure that no overscroll event is sent to document.

    document.addEventListener("overscroll",

        t.unreached_func("Document got unexpected overscroll event."));

    await waitForCompositorCommit();

    // Do a horizontal scroll and wait for overscroll event.

    await touchScrollInTarget(100, scrolling_div , 'right');

    await waitFor(() => { return overscrolled_x_delta > 0; },

        'Scroller did not receive overscroll event after horizontal scroll.');

    assert_equals(scrolling_div.scrollWidth - scrolling_div.scrollLeft,

                scrolling_div.clientWidth);

    overscrolled_x_delta = 0;

    overscrolled_y_delta = 0;

    // Do a vertical scroll and wait for overscroll event.

    await touchScrollInTarget(100, scrolling_div, 'down');

    await waitFor(() => { return overscrolled_y_delta > 0; },

        'Scroller did not receive overscroll event after vertical scroll.');

    assert_equals(scrolling_div.scrollHeight - scrolling_div.scrollTop,

                scrolling_div.clientHeight);

  }, 'Tests that the scrolled element gets overscroll event after fully scrolling by touch.');

</script>