events_input_sources_change.https.html

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This test has a WPT meta file that expects 2 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /webxr/events_input_sources_change.https.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

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

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

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

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

<script>

"use strict"

let testName = "Transient input sources fire events in the right order";

let watcherDone = new Event("watcherdone");

let fakeDeviceInitParams = TRACKED_IMMERSIVE_DEVICE;

let testFunction = function(session, fakeDeviceController, t) {

  let eventWatcher = new EventWatcher(

    t, session, ["inputsourceschange", "selectstart", "select", "selectend", "watcherdone"]);

  let eventPromise = eventWatcher.wait_for(

    ["inputsourceschange", "selectstart", "select", "selectend", "inputsourceschange", "watcherdone"]);

  let inputChangeEvents = 0;

  let cached_input_source = null;

  function onInputSourcesChange(event) {

    t.step(() => {

      inputChangeEvents++;

      assert_equals(event.session, session);

      validateSameObject(event);

      assert_throws_js(

          TypeError,

          () => { event.added[0] = "test"; },

          "added array must be frozen"

);

      assert_throws_js(

          TypeError,

          () => { event.removed[0] = "test"; },

          "removed array must be frozen"

);

      // The first change event should be adding our controller.

      if (inputChangeEvents === 1) {

        validateAdded(event.added, 1);

        validateRemoved(event.removed, 0);

        cached_input_source = session.inputSources[0];

        assert_not_equals(cached_input_source, null);

      } else if (inputChangeEvents === 2) {

        // The second event should be removing our controller.

        validateAdded(event.added, 0);

        validateRemoved(event.removed, 1);

        assert_true(event.removed.includes(cached_input_source));

        session.dispatchEvent(watcherDone);

});

  function validateAdded(added, length) {

    t.step(() => {

      assert_not_equals(added, null);

      assert_equals(added.length, length,

          "Added length matches expectations");

      let currentSources = Array.from(session.inputSources.values());

      added.forEach((source) => {

        assert_true(currentSources.includes(source),

          "Every element in added should be in the input source list");

});

});

  function validateRemoved(removed, length) {

    t.step(() => {

      assert_not_equals(removed, null);

        assert_equals(removed.length, length,

            "Removed length matches expectations");

      let currentSources = Array.from(session.inputSources.values());

      removed.forEach((source) => {

        assert_false(currentSources.includes(source),

          "No element in removed should be in the input source list");

});

});

  // Verifies that the same object is returned each time attributes are accessed

  // on an XRInputSourcesChangeEvent, as required by the spec.

  function validateSameObject(event) {

    let eventSession = event.session;

    let added = event.added;

    let removed = event.removed;

    t.step(() => {

      assert_equals(eventSession, event.session,

        "XRInputSourcesChangeEvent.session returns the same object.");

      assert_equals(added, event.added,

        "XRInputSourcesChangeEvent.added returns the same object.");

      assert_equals(removed, event.removed,

        "XRInputSourcesChangeEvent.removed returns the same object.");

});

  session.addEventListener('inputsourceschange', onInputSourcesChange, false);

  // Create our input source and immediately toggle the primary input so that

  // it appears as already needing to send a click event when it appears.

  let input_source = fakeDeviceController.simulateInputSourceConnection({

    handedness: "right",

    targetRayMode: "tracked-pointer",

    pointerOrigin: VALID_POINTER_TRANSFORM,

    profiles: [],

    selectionClicked: true

});

  // Make our input source disappear after one frame, and wait an additional

  // frame for that disappearance to propogate.

  requestSkipAnimationFrame(session, (time, xrFrame) => {

    input_source.disconnect();

    session.requestAnimationFrame((time, xrFrame) => {});

});

  return eventPromise;

};

xr_session_promise_test(

  testName, testFunction, fakeDeviceInitParams, 'immersive-vr');

</script>