Bug 788960 - Intermittent test_tcpsocket.js | command timed out: 1200 seconds without output, attempting to kill. timeout code to show error to help debugging. r=fabrice

dom/network/tests/unit/test_tcpsocket.js

@@ -476,4 +476,9 @@ function run_test() {
   server = new TestServer();
 
   run_next_test();
+
+  do_timeout(10000, function() {
+    do_throw(
+      "The test should never take this long unless the system is hosed.");
+  });
 }