diff -r 000000000000 -r 6474c204b198 chrome/test/unit/test_abi.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/chrome/test/unit/test_abi.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,60 @@
+const XULAppInfo = {
+  vendor: "Mozilla",
+  name: "XPCShell",
+  ID: "{39885e5f-f6b4-4e2a-87e5-6259ecf79011}",
+  version: "5",
+  appBuildID: "2007010101",
+  platformVersion: "1.9",
+  platformBuildID: "2007010101",
+  inSafeMode: false,
+  logConsoleErrors: true,
+  OS: "XPCShell",
+  XPCOMABI: "noarch-spidermonkey",
+  
+  QueryInterface: function QueryInterface(iid) {
+    if (iid.equals(Ci.nsIXULAppInfo)
+     || iid.equals(Ci.nsIXULRuntime)
+     || iid.equals(Ci.nsISupports))
+      return this;
+  
+    throw Components.results.NS_ERROR_NO_INTERFACE;
+  }
+};
+
+const XULAppInfoFactory = {
+  // These two are used when we register all our factories (and unregister)
+  CID: XULAPPINFO_CID,
+  scheme: "XULAppInfo",
+  contractID: XULAPPINFO_CONTRACTID,
+  createInstance: function (outer, iid) {
+    if (outer != null)
+      throw Cr.NS_ERROR_NO_AGGREGATION;
+    return XULAppInfo.QueryInterface(iid);
+  }
+};
+
+var registrar = Components.manager.QueryInterface(Ci.nsIComponentRegistrar);
+registrar.registerFactory(XULAPPINFO_CID, "XULAppInfo",
+                          XULAPPINFO_CONTRACTID, XULAppInfoFactory);
+
+registerManifests([do_get_file("data/test_abi.manifest")]);
+
+const catman = Components.classes["@mozilla.org/categorymanager;1"].
+  getService(Components.interfaces.nsICategoryManager);
+
+function is_registered(name) {
+  try {
+    var d = catman.getCategoryEntry("abitest", name);
+    return d == "found";
+  }
+  catch (e) {
+    return false;
+  }
+}
+
+function run_test() {
+  do_check_true(is_registered("test1"));
+  do_check_false(is_registered("test2"));
+  do_check_true(is_registered("test3"));
+  do_check_false(is_registered("test4"));
+}