1 files changed, 104 insertions, 0 deletions
diff --git a/toolkit/content/tests/browser/browser_mediaPlayback_mute.js b/toolkit/content/tests/browser/browser_mediaPlayback_mute.js
new file mode 100644
index 000000000..852fc56fb
--- /dev/null
+++ b/toolkit/content/tests/browser/browser_mediaPlayback_mute.js
@@ -0,0 +1,104 @@
+const PAGE = "https://example.com/browser/toolkit/content/tests/browser/file_mediaPlayback2.html";
+const FRAME = "https://example.com/browser/toolkit/content/tests/browser/file_mediaPlaybackFrame2.html";
+
+function wait_for_event(browser, event) {
+  return BrowserTestUtils.waitForEvent(browser, event, false, (event) => {
+    is(event.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
+  }
+}
+
+function* test_on_browser(url, browser) {
+  browser.loadURI(url);
+  yield wait_for_event(browser, "DOMAudioPlaybackStarted");
+
+  var result = yield ContentTask.spawn(browser, null, 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");
+
+  yield wait_for_event(browser, "DOMAudioPlaybackStopped");
+
+  result = yield ContentTask.spawn(browser, null, test_audio_in_browser);
+  is(result.computedVolume, 0, "Audio volume is 0 when muted");
+  is(result.computedMuted, true, "Audio is muted");
+}
+
+function* test_visibility(url, browser) {
+  browser.loadURI(url);
+  yield wait_for_event(browser, "DOMAudioPlaybackStarted");
+
+  var result = yield ContentTask.spawn(browser, null, test_audio_in_browser);
+  is(result.computedVolume, 1, "Audio volume is 1");
+  is(result.computedMuted, false, "Audio is not muted");
+
+  yield 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");
+
+  yield wait_for_event(browser, "DOMAudioPlaybackStopped");
+
+  result = yield ContentTask.spawn(browser, null, test_audio_in_browser);
+  is(result.computedVolume, 0, "Audio volume is 0 when muted");
+  is(result.computedMuted, true, "Audio is muted");
+}
+
+add_task(function*() {
+  yield new Promise((resolve) => {
+    SpecialPowers.pushPrefEnv({"set": [
+      ["media.useAudioChannelService.testing", true]
+    ]}, resolve);
+  });
+});
+
+add_task(function* test_page() {
+  yield BrowserTestUtils.withNewTab({
+    gBrowser,
+    url: "about:blank",
+  }, test_on_browser.bind(undefined, PAGE));
+});
+
+add_task(function* test_frame() {
+  yield BrowserTestUtils.withNewTab({
+    gBrowser,
+    url: "about:blank",
+  }, test_on_browser.bind(undefined, FRAME));
+});
+
+add_task(function* test_frame() {
+  yield BrowserTestUtils.withNewTab({
+    gBrowser,
+    url: "about:blank",
+  }, test_visibility.bind(undefined, PAGE));
+});