limit cbtests to 2.6.11 and above

Test hangs on older versions of Redis

Author: jeffbski

test.js

@@ -881,8 +881,11 @@ tests.PUNSUB_EMPTY = function () {
 };
 
 tests.UNSUB_EMPTY_CB = function () {
-  // test situation where unsubscribe reply[1] is null
   var name = "UNSUB_EMPTY_CB";
+  // test hangs on older versions of redis, so skip
+  if (!server_version_at_least(client, [2, 6, 11])) return next(name);
+
+  // test situation where unsubscribe reply[1] is null
   client3.unsubscribe(); // unsubscribe from all so can test null
   client3.unsubscribe(function (err, results) {
       // reply[1] will be null
@@ -892,8 +895,11 @@ tests.UNSUB_EMPTY_CB = function () {
 };
 
 tests.PUNSUB_EMPTY_CB = function () {
-  // test situation where punsubscribe reply[1] is null
   var name = "PUNSUB_EMPTY_CB";
+  // test hangs on older versions of redis, so skip
+  if (!server_version_at_least(client, [2, 6, 11])) return next(name);
+
+  // test situation where punsubscribe reply[1] is null
   client3.punsubscribe(); // punsubscribe from all so can test null
   client3.punsubscribe(function (err, results) {
       // reply[1] will be null