<!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_promise_test(
      "Requesting a session with no mode rejects",
      (t) => {
        return navigator.xr.test.simulateDeviceConnection(VALID_NON_IMMERSIVE_DEVICE)
          .then( (controller) => new Promise((resolve) => {
            navigator.xr.test.simulateUserActivation( () => {
              t.step_func(() => {
                assert_throws_js(TypeError, () => navigator.xr.requestSession())
              })
              resolve()
            });
          }));
      });
  </script>
</body>