<!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>

let testName = "XRInputSources properly communicate their handedness";

let fakeDeviceInitParams = TRACKED_IMMERSIVE_DEVICE;

let testFunction =
  (session, fakeDeviceController, t) => new Promise((resolve) => {
    let input_source = fakeDeviceController.simulateInputSourceConnection({
      handedness: "none",
      targetRayMode: "tracked-pointer",
      pointerOrigin: VALID_POINTER_TRANSFORM,
      profiles: []
    });

    function CheckNone(time, xrFrame) {
      let source = session.inputSources[0];

      t.step( () => {
        assert_not_equals(source, null);
        // Handedness should be "none" by default.
        assert_equals(source.handedness, "none");
      });

      input_source.setHandedness("right");

      session.requestAnimationFrame(CheckRight);
    }

    function CheckRight(time, xrFrame) {
      let source = session.inputSources[0];

      t.step( () => {
        assert_not_equals(source, null);
        // Handedness was set to "right", make sure it propegates.
        assert_equals(source.handedness, "right");
      });

      input_source.setHandedness("left");

      session.requestAnimationFrame(CheckLeft);
    }

    function CheckLeft(time, xrFrame) {
      let source = session.inputSources[0];

      t.step( () => {
        assert_not_equals(source, null);
        // Handedness was set to "left", make sure it propegates.
        assert_equals(source.handedness, "left");
      });

      input_source.setHandedness("none");

      session.requestAnimationFrame(CheckNoneAgain);
    }

    function CheckNoneAgain(time, xrFrame) {
      let source = session.inputSources[0];

      t.step( () => {
        assert_not_equals(source, null);
        // Handedness was set to "none" again, make sure it propegates.
        assert_equals(source.handedness, "none");
      });

      resolve();
    }

    // Handedness only updates during an XR frame.
    requestSkipAnimationFrame(session, CheckNone);
  });

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

</script>