mousemove_prevent_default_action.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:
- /uievents/mouse/mousemove_prevent_default_action.html - WPT Dashboard Interop Dashboard

<!doctype html>

<meta charset=utf-8>

<title>mousemove event: preventDefault()</title>

<link rel="author" title="Mirko Brodesser" href="mailto:mbrodesser@mozilla.com">

<link rel="help" href="https://github.com/w3c/uievents/issues/278">

<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/utils.js></script>

<body>

  <div id="a">div a</div>

  <div id="b">div b</div>

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

</body>

<script>

  'use strict';

  let event_log = [];

  function logEvents(e) {

    event_log.push(e.type);

  function initialize(test) {

    // Deliberately avoiding mouseup here because the last selectionchange

    // may be fired before or after the mouseup.

    addTestScopedListener(document, "mousedown", logEvents, test);

    addTestScopedListener(document, "mousemove", e => e.preventDefault(), test);

    event_log = [];

  promise_test(async test => {

    initialize(test);

    addTestScopedListener(document, "selectionchange", logEvents, test);

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

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

    let mouseup_promise = getEvent("mouseup", document);

    await new test_driver.Actions()

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

        .pointerDown()

        .addTick()

        .addTick()

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

        .addTick()

        .addTick()

        .pointerUp()

        .send();

    await mouseup_promise;

    const expected_events = ["mousedown", "selectionchange", "selectionchange"];

    assert_equals(event_log.toString(), expected_events.toString(),

        "received events");

  }, "selectionchange event firing when mousemove event is prevented");

  promise_test(async test => {

    initialize(test);

    addTestScopedListener(document, 'dragstart', (event) => {

      // For this test, it is enough to see the dragstart event. The event is

      // cancelled here to suppress the actual drag operation because Blink's

      // implementation of test_driver doesn't seem to be able to dispatch any

      // event once the dragging is active.

      event.preventDefault();

      logEvents(event);

    }, test);

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

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

    const mouseup_promise = getEvent('mouseup', document);

    await new test_driver.Actions()

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

        .pointerDown()

        .addTick()

        .addTick()

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

        .addTick()

        .addTick()

        .pointerUp()

        .send();

    await mouseup_promise;

    const expected_events = ["mousedown", "dragstart"];

    assert_equals(event_log.toString(), expected_events.toString(),

        "received events");

  }, "dragstart event firing when mousemove event is prevented");

</script>