speculation-rules/prerender/resources/speech-synthesis.https.html

<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/speculation-rules/prerender/resources/utils.js"></script>
<script src="/speculation-rules/prerender/resources/deferred-promise-utils.js"></script>
<script src="webspeech.js"></script>

<script>
const params = new URLSearchParams(location.search);

// The main test page (restriction-speech-synthesis.https.html) loads the
// initiator page, then the initiator page will prerender itself with the
// `prerendering` parameter.
const isPrerendering = params.has('prerendering');

if (!isPrerendering) {
  loadInitiatorPage();
} else {
  const method = params.get('method');
  const prerenderEventCollector = new PrerenderEventCollector();
  const promise = new Promise((resolve, reject) => {
    switch(method) {
      case 'speak': {
        const utter = new SpeechSynthesisUtterance('1');
        // https://wicg.github.io/speech-api/#tts-methods
        // This tests that speak() is completed after prerendering activation.
        utter.onend = () => { resolve(); }
        speechSynthesis.speak(utter);
        break;
      }
      case 'cancel': {
        const utter = new SpeechSynthesisUtterance('1');
        // https://wicg.github.io/speech-api/#speechsynthesiserrorevent-attributes
        // A cancel method call causes 'canceled' or 'interrupted'.
        // This tests if one of them happens after prerendering activation.
        utter.onerror = (e) => {
          if (e.error == 'canceled' || e.error == 'interrupted')
            resolve();
        }
        speechSynthesis.speak(utter);
        speechSynthesis.cancel();
        break;
      }
      case 'pause': {
        const utter = new SpeechSynthesisUtterance('1');
        utter.onpause = () => { resolve(); }
        speechSynthesis.speak(utter);
        speechSynthesis.pause();
        // To reset the current status for the next test, it calls cancel().
        speechSynthesis.cancel();
        break;
      }
      case 'resume': {
        const utter = new SpeechSynthesisUtterance('1');
        utter.onresume = () => { resolve(); }
        speechSynthesis.speak(utter);
        speechSynthesis.pause();
        speechSynthesis.resume();
        break;
      }
    }
  });
  prerenderEventCollector.start(promise, `speechSynthesis.${method}`);
}
</script>