<!DOCTYPE html>
<title>SpeechRecognition installOnDevice</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
promise_test(async (t) => {
  const validLang = "en-US";
  const invalidLang = "invalid language code";
  window.SpeechRecognition = window.SpeechRecognition || window.webkitSpeechRecognition;

  // Test that it returns a promise.
  const validResultPromise = SpeechRecognition.installOnDevice(validLang);
  assert_true(
    validResultPromise instanceof Promise,
    "installOnDevice should return a Promise."
  );

  // Verify the resolved value is a boolean.
  const validResult = await validResultPromise;
  assert_true(
    typeof validResult === "boolean",
    "The resolved value of the installOnDevice promise should be a boolean."
  );

  // Verify that the method returns true when called with a supported language code.
  assert_equals(
    validResult,
    true,
    "installOnDevice should resolve with `true` when called with a supported language code."
  );

  // Test that it returns a promise.
  const invalidResultPromise = SpeechRecognition.installOnDevice(invalidLang);
  const invalidResult = await invalidResultPromise;
  assert_equals(
    invalidResult,
    false,
    "installOnDevice should resolve with `false` when called with an unsupported language code."
  );
}, "SpeechRecognition.installOnDevice resolves with a boolean value.");

promise_test(async (t) => {
  const iframe = document.createElement("iframe");
  document.body.appendChild(iframe);
  const frameWindow = iframe.contentWindow;
  const frameDOMException = frameWindow.DOMException;
  const frameSpeechRecognition =
    frameWindow.SpeechRecognition || frameWindow.webkitSpeechRecognition;

  iframe.remove();
  await promise_rejects_dom(
    t,
    "InvalidStateError",
    frameDOMException,
    frameSpeechRecognition.installOnDevice("en-US"),
  );
}, "SpeechRecognition.installOnDevice rejects in a detached context.");
</script>