webxr/ar-module/xrSession_environmentBlendMode.https.html

<!DOCTYPE html>
<body>
  <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>
    xr_session_promise_test(
      "Tests environmentBlendMode for an AR device",
      (session) => {
        assert_not_equals(session.environmentBlendMode, "opaque");
        assert_in_array(session.environmentBlendMode, ["alpha-blend", "additive"]);
      }, IMMERSIVE_AR_DEVICE, 'immersive-ar', {});


    xr_session_promise_test(
      "Tests environmentBlendMode for a VR device",
      (session) => {
        assert_not_equals(session.environmentBlendMode, "alpha-blend");
        assert_in_array(session.environmentBlendMode, ["opaque", "additive"]);
      }, TRACKED_IMMERSIVE_DEVICE, 'immersive-vr', {});
</script>
</body>