1 files changed, 55 insertions, 0 deletions
diff --git a/browser/components/originattributes/test/browser/browser_broadcastChannel.js b/browser/components/originattributes/test/browser/browser_broadcastChannel.js
new file mode 100644
index 0000000000..805df90c17
--- /dev/null
+++ b/browser/components/originattributes/test/browser/browser_broadcastChannel.js
@@ -0,0 +1,55 @@
+/*
+ * Bug 1264571 - A test case of broadcast channels for first party isolation.
+ */
+
+const TEST_DOMAIN = "http://example.net/";
+const TEST_PATH =
+  TEST_DOMAIN + "browser/browser/components/originattributes/test/browser/";
+const TEST_PAGE = TEST_PATH + "file_broadcastChannel.html";
+
+// IsolationTestTools flushes all preferences
+// hence we explicitly pref off https-first mode
+async function prefOffHttpsFirstMode() {
+  await SpecialPowers.pushPrefEnv({
+    set: [["dom.security.https_first", false]],
+  });
+}
+
+async function doTest(aBrowser) {
+  let response = await SpecialPowers.spawn(aBrowser, [], async function () {
+    let displayItem = content.document.getElementById("display");
+
+    // If there is nothing in the 'display', we will try to send a message to
+    // the broadcast channel and wait until this message has been delivered.
+    // The way that how we make sure the message is delivered is based on an
+    // iframe which will reply everything it receives from the broadcast channel
+    // to the current window through the postMessage. So, we can know that the
+    // boradcast message is sent successfully when the window receives a message
+    // from the iframe.
+    if (displayItem.innerHTML === "") {
+      let data = Math.random().toString();
+
+      let receivedData = await new Promise(resolve => {
+        let listenFunc = event => {
+          content.removeEventListener("message", listenFunc);
+          resolve(event.data);
+        };
+
+        let bc = new content.BroadcastChannel("testBroadcastChannel");
+
+        content.addEventListener("message", listenFunc);
+        bc.postMessage(data);
+      });
+
+      Assert.equal(receivedData, data, "The value should be the same.");
+
+      return receivedData;
+    }
+
+    return displayItem.innerHTML;
+  });
+
+  return response;
+}
+
+IsolationTestTools.runTests(TEST_PAGE, doTest, null, prefOffHttpsFirstMode);