Add redis error codes to the errors

test/commands/keys.spec.js

@@ -14,6 +14,9 @@ describe("The 'keys' method", function () {
             var client;
 
             beforeEach(function (done) {
+                args = args || {};
+                // This is going to test if the high water is also respected
+                args.command_queue_high_water = 100;
                 client = redis.createClient.apply(redis.createClient, args);
                 client.once("connect", function () {
                     client.flushdb(done);