1 files changed, 51 insertions, 0 deletions
diff --git a/testing/web-platform/tests/speech-api/idlharness.window.js b/testing/web-platform/tests/speech-api/idlharness.window.js
new file mode 100644
index 0000000000..77eb6a1be9
--- /dev/null
+++ b/testing/web-platform/tests/speech-api/idlharness.window.js
@@ -0,0 +1,51 @@
+// META: script=/resources/WebIDLParser.js
+// META: script=/resources/idlharness.js
+// META: timeout=long
+
+'use strict';
+
+// https://w3c.github.io/speech-api/#dom-speechsynthesis-getvoices can
+// return an empty list and a voiceschanged event is fired if the list of
+// voices is determined asynchronously.
+function getVoices() {
+  return new Promise(resolve => {
+    const voices = speechSynthesis.getVoices();
+    if (voices.length) {
+        resolve(voices);
+    } else {
+        // wait for voiceschanged event
+        speechSynthesis.addEventListener('voiceschanged', () => {
+          resolve(speechSynthesis.getVoices());
+        }, { once: true });
+      }
+  });
+}
+
+idl_test(
+  ['speech-api'],
+  ['dom', 'html'],
+  (idl_array, t) => {
+    idl_array.add_objects({
+      SpeechGrammar: ['new SpeechGrammar()'],
+      SpeechGrammarList: ['new SpeechGrammarList()'],
+      SpeechRecognition: ['new SpeechRecognition()'],
+      // TODO: SpeechRecognitionAlternative
+      // TODO: SpeechRecognitionErrorEvent
+      // TODO: SpeechRecognitionEvent
+      // TODO: SpeechRecognitionResult
+      // TODO: SpeechRecognitionResultList
+      SpeechSynthesis: ['speechSynthesis'],
+      // TODO: SpeechSynthesisErrorEvent
+      // TODO: SpeechSynthesisEvent
+      SpeechSynthesisUtterance: ['new SpeechSynthesisUtterance()'],
+      SpeechSynthesisVoice: ['voice'],
+      Window: ['self'],
+    });
+
+    const awaitVoice = getVoices().then(voices => self.voice = voices[0]);
+    const timeout = new Promise((_, reject) => {
+      t.step_timeout(() => reject('Timed out waiting for voice'), 3000);
+    });
+    return Promise.race([awaitVoice, timeout]);
+  }
+);