diff -r 000000000000 -r 6474c204b198 browser/base/content/test/social/browser_social_isVisible.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/base/content/test/social/browser_social_isVisible.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,67 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+function test() {
+  waitForExplicitFinish();
+
+  let manifest = { // normal provider
+    name: "provider 1",
+    origin: "https://example.com",
+    sidebarURL: "https://example.com/browser/browser/base/content/test/social/social_sidebar.html",
+    workerURL: "https://example.com/browser/browser/base/content/test/social/social_worker.js",
+    iconURL: "https://example.com/browser/browser/base/content/test/general/moz.png"
+  };
+  runSocialTestWithProvider(manifest, function (finishcb) {
+    SocialSidebar.show();
+    runSocialTests(tests, undefined, undefined, finishcb);
+  });
+}
+
+var tests = {
+  testSidebarMessage: function(next) {
+    let port = SocialSidebar.provider.getWorkerPort();
+    ok(port, "provider has a port");
+    port.postMessage({topic: "test-init"});
+    port.onmessage = function (e) {
+      let topic = e.data.topic;
+      switch (topic) {
+        case "got-sidebar-message":
+          // The sidebar message will always come first, since it loads by default
+          ok(true, "got sidebar message");
+          port.close();
+          next();
+          break;
+      }
+    };
+  },
+  testIsVisible: function(next) {
+    let port = SocialSidebar.provider.getWorkerPort();
+    port.postMessage({topic: "test-init"});
+    port.onmessage = function (e) {
+      let topic = e.data.topic;
+      switch (topic) {
+        case "got-isVisible-response":
+          is(e.data.result, true, "Sidebar should be visible by default");
+          SocialSidebar.toggleSidebar();
+          port.close();
+          next();
+      }
+    };
+    port.postMessage({topic: "test-isVisible"});
+  },
+  testIsNotVisible: function(next) {
+    let port = SocialSidebar.provider.getWorkerPort();
+    port.postMessage({topic: "test-init"});
+    port.onmessage = function (e) {
+      let topic = e.data.topic;
+      switch (topic) {
+        case "got-isVisible-response":
+          is(e.data.result, false, "Sidebar should be hidden");
+          port.close();
+          next();
+      }
+    };
+    port.postMessage({topic: "test-isVisible"});
+  }
+}