1 files changed, 118 insertions, 0 deletions
diff --git a/browser/base/content/test/tabMediaIndicator/browser_mediaPlayback_mute.js b/browser/base/content/test/tabMediaIndicator/browser_mediaPlayback_mute.js
new file mode 100644
index 0000000000..05999a37cd
--- /dev/null
+++ b/browser/base/content/test/tabMediaIndicator/browser_mediaPlayback_mute.js
@@ -0,0 +1,118 @@
+const PAGE = GetTestWebBasedURL("file_mediaPlayback2.html");
+const FRAME = GetTestWebBasedURL("file_mediaPlaybackFrame2.html");
+
+function wait_for_event(browser, event) {
+  return BrowserTestUtils.waitForEvent(browser, event, false, e => {
+    is(
+      e.originalTarget,
+      browser,
+      "Event must be dispatched to correct browser."
+    );
+    return true;
+  });
+}
+
+function test_audio_in_browser() {
+  function get_audio_element() {
+    var doc = content.document;
+    var list = doc.getElementsByTagName("audio");
+    if (list.length == 1) {
+      return list[0];
+    }
+
+    // iframe?
+    list = doc.getElementsByTagName("iframe");
+
+    var iframe = list[0];
+    list = iframe.contentDocument.getElementsByTagName("audio");
+    return list[0];
+  }
+
+  var audio = get_audio_element();
+  return {
+    computedVolume: audio.computedVolume,
+    computedMuted: audio.computedMuted,
+  };
+}
+
+async function test_on_browser(url, browser) {
+  BrowserTestUtils.loadURIString(browser, url);
+  await wait_for_event(browser, "DOMAudioPlaybackStarted");
+
+  var result = await SpecialPowers.spawn(browser, [], test_audio_in_browser);
+  is(result.computedVolume, 1, "Audio volume is 1");
+  is(result.computedMuted, false, "Audio is not muted");
+
+  ok(!browser.audioMuted, "Audio should not be muted by default");
+  browser.mute();
+  ok(browser.audioMuted, "Audio should be muted now");
+
+  await wait_for_event(browser, "DOMAudioPlaybackStopped");
+
+  result = await SpecialPowers.spawn(browser, [], test_audio_in_browser);
+  is(result.computedVolume, 0, "Audio volume is 0 when muted");
+  is(result.computedMuted, true, "Audio is muted");
+}
+
+async function test_visibility(url, browser) {
+  BrowserTestUtils.loadURIString(browser, url);
+  await wait_for_event(browser, "DOMAudioPlaybackStarted");
+
+  var result = await SpecialPowers.spawn(browser, [], test_audio_in_browser);
+  is(result.computedVolume, 1, "Audio volume is 1");
+  is(result.computedMuted, false, "Audio is not muted");
+
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: "about:blank",
+    },
+    function () {}
+  );
+
+  ok(!browser.audioMuted, "Audio should not be muted by default");
+  browser.mute();
+  ok(browser.audioMuted, "Audio should be muted now");
+
+  await wait_for_event(browser, "DOMAudioPlaybackStopped");
+
+  result = await SpecialPowers.spawn(browser, [], test_audio_in_browser);
+  is(result.computedVolume, 0, "Audio volume is 0 when muted");
+  is(result.computedMuted, true, "Audio is muted");
+}
+
+add_task(async function () {
+  await SpecialPowers.pushPrefEnv({
+    set: [["media.useAudioChannelService.testing", true]],
+  });
+});
+
+add_task(async function test_page() {
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: "about:blank",
+    },
+    test_on_browser.bind(undefined, PAGE)
+  );
+});
+
+add_task(async function test_frame() {
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: "about:blank",
+    },
+    test_on_browser.bind(undefined, FRAME)
+  );
+});
+
+add_task(async function test_frame() {
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: "about:blank",
+    },
+    test_visibility.bind(undefined, PAGE)
+  );
+});