1 files changed, 75 insertions, 0 deletions
diff --git a/dom/browser-element/mochitest/browserElement_AudioPlayback.js b/dom/browser-element/mochitest/browserElement_AudioPlayback.js
new file mode 100644
index 000000000..bcbe89cb1
--- /dev/null
+++ b/dom/browser-element/mochitest/browserElement_AudioPlayback.js
@@ -0,0 +1,75 @@
+/* Any copyright is dedicated to the public domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Test the mozbrowseraudioplaybackchange event is fired correctly.
+'use strict';
+
+const { Services } = SpecialPowers.Cu.import('resource://gre/modules/Services.jsm');
+
+SimpleTest.waitForExplicitFinish();
+browserElementTestHelpers.setEnabledPref(true);
+
+/**
+ * Content script passed to the child iframe
+ */
+function playAudioScript() {
+  var audio = new content.Audio();
+  content.document.body.appendChild(audio);
+  audio.oncanplay = function() {
+    audio.play();
+  };
+  audio.src = 'audio.ogg';
+}
+
+/**
+ * Creates a simple mozbrowser frame
+ */
+function createFrame() {
+  let iframe = document.createElement('iframe');
+  iframe.setAttribute('mozbrowser', 'true');
+  document.body.appendChild(iframe);
+  return iframe;
+}
+
+function runTest() {
+  SimpleTest.waitForExplicitFinish();
+
+  let iframe = createFrame();
+  let iframe2 = createFrame();
+
+  // When the first iframe is finished loading inject a script to create
+  // an audio element and play it.
+  iframe.addEventListener('mozbrowserloadend', () => {
+    let mm = SpecialPowers.getBrowserFrameMessageManager(iframe);
+    mm.loadFrameScript('data:,(' + playAudioScript.toString() + ')();', false);
+  });
+
+  // Two events should come in, when the audio starts, and stops playing.
+  // The first one should have a detail of 'active' and the second one
+  // should have a detail of 'inactive-pause'.
+  let expectedNextData = 'active';
+  iframe.addEventListener('mozbrowseraudioplaybackchange', (e) => {
+    is(e.detail, expectedNextData, 'Audio detail should be correct')
+    is(e.target, iframe, 'event target should be the first iframe')
+    if (e.detail === 'inactive-pause') {
+      SimpleTest.finish();
+    }
+    expectedNextData = 'inactive-pause';
+  });
+
+  // Make sure an event only goes to the first iframe.
+  iframe2.addEventListener('mozbrowseraudioplaybackchange', (e) => {
+    ok(false,
+       'mozbrowseraudioplaybackchange should dispatch to the correct browser');
+  });
+
+  // Load a simple page to get the process started.
+  iframe.src = browserElementTestHelpers.fileEmptyPage1;
+}
+
+addEventListener('testready', function() {
+  SpecialPowers.pushPrefEnv({'set': [["b2g.system_startup_url", window.location.href]]},
+                            function() {
+    SimpleTest.executeSoon(runTest);
+  });
+});