<!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 = "XRViewerPose.views meets [SameObject] requirement";

let testFunction = function(session, fakeDeviceController, t) {
  return new Promise((resolve) => {
    session.requestReferenceSpace('local').then((referenceSpace) => {
      session.requestAnimationFrame((time, xrFrame) => {
        // Make sure that the views attribute is the same object each time we
        // access it. This verifies that XRViewerPose does *not* do something
        // spec-noncompliant such as creating and returning a new XRView array
        // each time the attribute is accessed.
        let viewerPose = xrFrame.getViewerPose(referenceSpace);
        let views = viewerPose.views;
        t.step(() => {
          assert_equals(viewerPose.views, views,
            "XRViewerPose.views returns the same object.");
        });

        resolve();
      });
    });
  });
};

xr_session_promise_test(
  testName, testFunction, TRACKED_IMMERSIVE_DEVICE, 'immersive-vr');
</script>
