1 files changed, 78 insertions, 0 deletions
diff --git a/dom/media/autoplay/test/browser/browser_autoplay_policy.js b/dom/media/autoplay/test/browser/browser_autoplay_policy.js
new file mode 100644
index 0000000000..79b19eedc1
--- /dev/null
+++ b/dom/media/autoplay/test/browser/browser_autoplay_policy.js
@@ -0,0 +1,78 @@
+/**
+ * This test is used to ensure we can get the correct document's autoplay policy
+ * under different situations.
+ * Spec discussion : https://github.com/WICG/autoplay/issues/1
+ */
+const PAGE = GetTestWebBasedURL("file_empty.html");
+
+function setupTestPreferences(isAllowedAutoplay, isAllowedMuted) {
+  let autoplayDefault = SpecialPowers.Ci.nsIAutoplay.ALLOWED;
+  if (!isAllowedAutoplay) {
+    autoplayDefault = isAllowedMuted
+      ? SpecialPowers.Ci.nsIAutoplay.BLOCKED
+      : SpecialPowers.Ci.nsIAutoplay.BLOCKED_ALL;
+  }
+  return SpecialPowers.pushPrefEnv({
+    set: [
+      ["dom.media.autoplay.autoplay-policy-api", true],
+      ["media.autoplay.default", autoplayDefault],
+      ["media.autoplay.blocking_policy", 0],
+    ],
+  });
+}
+
+async function checkAutoplayPolicy(expectedAutoplayPolicy) {
+  is(
+    content.document.autoplayPolicy,
+    expectedAutoplayPolicy,
+    `Autoplay policy is correct.`
+  );
+}
+
+add_task(async function testAutoplayPolicy() {
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: PAGE,
+    },
+    async browser => {
+      info(`- Allow all kinds of media to autoplay -`);
+      let isAllowedAutoplay = true;
+      let isAllowedMuted = true;
+      await setupTestPreferences(isAllowedAutoplay, isAllowedMuted);
+      await SpecialPowers.spawn(browser, ["allowed"], checkAutoplayPolicy);
+
+      info(
+        `- Allow all kinds of media to autoplay even if changing the pref for muted media -`
+      );
+      isAllowedAutoplay = true;
+      isAllowedMuted = false;
+      await setupTestPreferences(isAllowedAutoplay, isAllowedMuted);
+      await SpecialPowers.spawn(browser, ["allowed"], checkAutoplayPolicy);
+
+      info(`- Disable autoplay for audible media -`);
+      isAllowedAutoplay = false;
+      isAllowedMuted = true;
+      await setupTestPreferences(isAllowedAutoplay, isAllowedMuted);
+      await SpecialPowers.spawn(
+        browser,
+        ["allowed-muted"],
+        checkAutoplayPolicy
+      );
+
+      info(`- Disable autoplay for all kinds of media -`);
+      isAllowedAutoplay = false;
+      isAllowedMuted = false;
+      await setupTestPreferences(isAllowedAutoplay, isAllowedMuted);
+      await SpecialPowers.spawn(browser, ["disallowed"], checkAutoplayPolicy);
+
+      info(
+        `- Simulate user gesture activation which would allow all kinds of media to autoplay -`
+      );
+      await SpecialPowers.spawn(browser, [], async () => {
+        content.document.notifyUserGestureActivation();
+      });
+      await SpecialPowers.spawn(browser, ["allowed"], checkAutoplayPolicy);
+    }
+  );
+});