Bug 1343465 - part2 : add test. r=baku

MozReview-Commit-ID: HypzfD053xW

--HG--
extra : rebase_source : a3dcb77937d9cc7554c083e8961e835f6574cf7c

toolkit/content/tests/browser/browser.ini

@@ -27,6 +27,10 @@ support-files =
 support-files =
   file_blockMedia_shouldPlay.html
   file_blockMedia_shouldNotPlay.html
+[browser_block_playMediaInMuteTab.js]
+tags = audiochannel
+support-files =
+  file_nonAutoplayAudio.html
 [browser_block_autoplay_playAfterTabVisible.js]
 tags = audiochannel
 support-files =

toolkit/content/tests/browser/browser_block_playMediaInMuteTab.js

@@ -0,0 +1,114 @@
+const PAGE = "https://example.com/browser/toolkit/content/tests/browser/file_nonAutoplayAudio.html";
+
+var SuspendedType = {
+  NONE_SUSPENDED             : 0,
+  SUSPENDED_PAUSE            : 1,
+  SUSPENDED_BLOCK            : 2,
+  SUSPENDED_PAUSE_DISPOSABLE : 3
+};
+
+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 check_audio_volume_and_mute(expectedMute) {
+  var audio = content.document.getElementById("testAudio");
+  if (!audio) {
+    ok(false, "Can't get the audio element!");
+  }
+
+  let expectedVolume = expectedMute ? 0.0 : 1.0;
+  is(expectedVolume, audio.computedVolume, "Audio's volume is correct!");
+  is(expectedMute, audio.computedMuted, "Audio's mute state is correct!")
+}
+
+function check_audio_suspended(suspendedType) {
+  var audio = content.document.getElementById("testAudio");
+  if (!audio) {
+    ok(false, "Can't get the audio element!");
+  }
+
+  is(audio.computedSuspended, suspendedType,
+     "The suspeded state of audio is correct.");
+}
+
+function check_audio_pause_state(expectedPauseState) {
+  var audio = content.document.getElementById("testAudio");
+  if (!audio) {
+    ok(false, "Can't get the audio element!");
+  }
+
+  is(audio.paused, expectedPauseState, "Audio is paused.");
+}
+
+function play_audio() {
+  var audio = content.document.getElementById("testAudio");
+  if (!audio) {
+    ok(false, "Can't get the audio element!");
+  }
+
+  audio.play();
+  ok(audio.paused, "Can't play audio, because the tab was still blocked.");
+}
+
+add_task(function* setup_test_preference() {
+  yield SpecialPowers.pushPrefEnv({"set": [
+    ["media.useAudioChannelService.testing", true],
+    ["media.block-autoplay-until-in-foreground", true]
+  ]});
+});
+
+add_task(function* unblock_icon_should_disapear_after_resume_tab() {
+  info("- open new background tab -");
+  let tab = window.gBrowser.addTab("about:blank");
+  tab.linkedBrowser.loadURI(PAGE);
+  yield BrowserTestUtils.browserLoaded(tab.linkedBrowser);
+
+  info("- audio doesn't be started in beginning -");
+  yield ContentTask.spawn(tab.linkedBrowser, true,
+                          check_audio_pause_state);
+
+  info("- audio shouldn't be muted or blocked -");
+  yield ContentTask.spawn(tab.linkedBrowser, SuspendedType.NONE_SUSPENDED,
+                          check_audio_suspended);
+  yield ContentTask.spawn(tab.linkedBrowser, false /* unmute */,
+                          check_audio_volume_and_mute);
+
+  info("- tab shouldn't display unblocking icon -");
+  yield waitForTabBlockEvent(tab, false);
+
+  info("- mute tab -");
+  tab.linkedBrowser.mute();
+  ok(tab.linkedBrowser.audioMuted, "Audio should be muted now");
+
+  info("- try to start audio in background tab -");
+  yield ContentTask.spawn(tab.linkedBrowser, null,
+                          play_audio);
+
+  info("- audio should be muted and blocked -");
+  yield ContentTask.spawn(tab.linkedBrowser, SuspendedType.SUSPENDED_BLOCK,
+                          check_audio_suspended);
+  yield ContentTask.spawn(tab.linkedBrowser, true /* mute */,
+                          check_audio_volume_and_mute);
+
+  info("- tab should display unblocking icon -");
+  yield waitForTabBlockEvent(tab, true);
+
+  info("- select tab as foreground tab -");
+  yield BrowserTestUtils.switchTab(window.gBrowser, tab);
+
+  info("- audio shoule be muted, but not be blocked -");
+  yield ContentTask.spawn(tab.linkedBrowser, SuspendedType.NONE_SUSPENDED,
+                          check_audio_suspended);
+  yield ContentTask.spawn(tab.linkedBrowser, true /* mute */,
+                          check_audio_volume_and_mute);
+
+  info("- tab should not display unblocking icon -");
+  yield waitForTabBlockEvent(tab, false);
+
+  info("- remove tab -");
+  yield BrowserTestUtils.removeTab(tab);
+});