1 files changed, 54 insertions, 0 deletions
diff --git a/dom/media/autoplay/test/browser/browser_autoplay_policy_play_twice.js b/dom/media/autoplay/test/browser/browser_autoplay_policy_play_twice.js
new file mode 100644
index 0000000000..7130e6e781
--- /dev/null
+++ b/dom/media/autoplay/test/browser/browser_autoplay_policy_play_twice.js
@@ -0,0 +1,54 @@
+const VIDEO_PAGE = GetTestWebBasedURL("file_video.html");
+
+function setup_test_preference(enableUserGesture) {
+  let state = enableUserGesture ? "enable" : "disable";
+  info(`- set pref : ${state} user gesture -`);
+  return SpecialPowers.pushPrefEnv({
+    set: [
+      ["media.autoplay.default", SpecialPowers.Ci.nsIAutoplay.BLOCKED],
+      ["media.autoplay.blocking_policy", enableUserGesture ? 0 : 1],
+    ],
+  });
+}
+
+async function allow_play_for_played_video() {
+  info("- open new tab  -");
+  let tab = await BrowserTestUtils.openNewForegroundTab(
+    window.gBrowser,
+    "about:blank"
+  );
+  BrowserTestUtils.loadURIString(tab.linkedBrowser, VIDEO_PAGE);
+  await BrowserTestUtils.browserLoaded(tab.linkedBrowser);
+
+  info("- simulate user-click to start video -");
+  await BrowserTestUtils.synthesizeMouseAtCenter(
+    "#v",
+    { button: 0 },
+    tab.linkedBrowser
+  );
+
+  async function play_video_again() {
+    let video = content.document.getElementById("v");
+    ok(!video.paused, "video is playing");
+
+    info("- call video play() again -");
+    try {
+      await video.play();
+      ok(true, "success to resolve play promise");
+    } catch (e) {
+      ok(false, "promise should not be rejected");
+    }
+  }
+  await SpecialPowers.spawn(tab.linkedBrowser, [], play_video_again);
+
+  info("- remove tab -");
+  BrowserTestUtils.removeTab(tab);
+}
+
+add_task(async function start_test() {
+  await setup_test_preference(true);
+  await allow_play_for_played_video();
+
+  await setup_test_preference(false);
+  await allow_play_for_played_video();
+});