1 files changed, 88 insertions, 0 deletions
diff --git a/browser/base/content/test/tabMediaIndicator/browser_sound_indicator_silent_video.js b/browser/base/content/test/tabMediaIndicator/browser_sound_indicator_silent_video.js
new file mode 100644
index 0000000000..8f0d6961ca
--- /dev/null
+++ b/browser/base/content/test/tabMediaIndicator/browser_sound_indicator_silent_video.js
@@ -0,0 +1,88 @@
+const SILENT_PAGE = GetTestWebBasedURL("file_silentAudioTrack.html");
+const ALMOST_SILENT_PAGE = GetTestWebBasedURL(
+  "file_almostSilentAudioTrack.html"
+);
+
+function check_audio_playing_state(isPlaying) {
+  let autoPlay = content.document.getElementById("autoplay");
+  if (!autoPlay) {
+    ok(false, "Can't get the audio element!");
+  }
+
+  is(
+    autoPlay.paused,
+    !isPlaying,
+    "The playing state of autoplay audio is correct."
+  );
+
+  // wait for a while to make sure the video is playing and related event has
+  // been dispatched (if any).
+  let PLAYING_TIME_SEC = 0.5;
+  ok(PLAYING_TIME_SEC < autoPlay.duration, "The playing time is valid.");
+
+  return new Promise(resolve => {
+    autoPlay.ontimeupdate = function () {
+      if (autoPlay.currentTime > PLAYING_TIME_SEC) {
+        resolve();
+      }
+    };
+  });
+}
+
+add_task(async function should_not_show_sound_indicator_for_silent_video() {
+  info("- open new foreground tab -");
+  let tab = await BrowserTestUtils.openNewForegroundTab(
+    window.gBrowser,
+    "about:blank"
+  );
+
+  info("- tab should not have sound indicator before playing silent video -");
+  await waitForTabSoundIndicatorDisappears(tab);
+
+  info("- loading autoplay silent video -");
+  BrowserTestUtils.loadURIString(tab.linkedBrowser, SILENT_PAGE);
+  await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
+  await SpecialPowers.spawn(
+    tab.linkedBrowser,
+    [true],
+    check_audio_playing_state
+  );
+
+  info("- tab should not have sound indicator after playing silent video -");
+  await waitForTabSoundIndicatorDisappears(tab);
+
+  info("- remove tab -");
+  BrowserTestUtils.removeTab(tab);
+});
+
+add_task(
+  async function should_not_show_sound_indicator_for_almost_silent_video() {
+    info("- open new foreground tab -");
+    let tab = await BrowserTestUtils.openNewForegroundTab(
+      window.gBrowser,
+      "about:blank"
+    );
+
+    info(
+      "- tab should not have sound indicator before playing almost silent video -"
+    );
+    await waitForTabSoundIndicatorDisappears(tab);
+
+    info("- loading autoplay almost silent video -");
+    BrowserTestUtils.loadURIString(tab.linkedBrowser, ALMOST_SILENT_PAGE);
+    await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
+    await SpecialPowers.spawn(
+      tab.linkedBrowser,
+      [true],
+      check_audio_playing_state
+    );
+
+    info(
+      "- tab should not have sound indicator after playing almost silent video -"
+    );
+    await waitForTabSoundIndicatorDisappears(tab);
+
+    info("- remove tab -");
+    BrowserTestUtils.removeTab(tab);
+  }
+);