diff -r 000000000000 -r 6474c204b198 toolkit/devtools/server/tests/unit/test_dbgglobal.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toolkit/devtools/server/tests/unit/test_dbgglobal.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,65 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+Cu.import("resource://gre/modules/devtools/dbg-server.jsm");
+Cu.import("resource://gre/modules/devtools/dbg-client.jsm");
+
+function run_test()
+{
+  // Should get an exception if we try to interact with DebuggerServer
+  // before we initialize it...
+  check_except(function() {
+    DebuggerServer.openListener(-1);
+  });
+  check_except(DebuggerServer.closeListener);
+  check_except(DebuggerServer.connectPipe);
+
+  // Allow incoming connections.
+  DebuggerServer.init(function () { return true; });
+
+  // These should still fail because we haven't added a createRootActor
+  // implementation yet.
+  check_except(function() {
+    DebuggerServer.openListener(-1);
+  });
+  check_except(DebuggerServer.closeListener);
+  check_except(DebuggerServer.connectPipe);
+
+  DebuggerServer.addActors("resource://test/testactors.js");
+
+  // Now they should work.
+  DebuggerServer.openListener(-1);
+  DebuggerServer.closeListener();
+
+  // Make sure we got the test's root actor all set up.
+  let client1 = DebuggerServer.connectPipe();
+  client1.hooks = {
+    onPacket: function(aPacket1) {
+      do_check_eq(aPacket1.from, "root");
+      do_check_eq(aPacket1.applicationType, "xpcshell-tests");
+
+      // Spin up a second connection, make sure it has its own root
+      // actor.
+      let client2 = DebuggerServer.connectPipe();
+      client2.hooks = {
+        onPacket: function(aPacket2) {
+          do_check_eq(aPacket2.from, "root");
+          do_check_neq(aPacket1.testConnectionPrefix,
+                       aPacket2.testConnectionPrefix);
+          client2.close();
+        },
+        onClosed: function(aResult) {
+          client1.close();
+        },
+      };
+      client2.ready();
+    },
+
+    onClosed: function(aResult) {
+      do_test_finished();
+    },
+  };
+
+  client1.ready();
+  do_test_pending();
+}