Add some more tests

index.js

@@ -1060,7 +1060,6 @@ Multi.prototype.execute_callback = function (err, replies) {
 
     if (err) {
         if (err.code !== 'CONNECTION_BROKEN') {
-            err.code = 'EXECABORT';
             err.errors = this.errors;
             if (this.callback) {
                 this.callback(err);

test/commands/eval.spec.js

@@ -128,6 +128,7 @@ describe("The 'eval' method", function () {
                     helper.serverVersionAtLeast.call(this, client, [2, 5, 0]);
                     client.evalsha('ffffffffffffffffffffffffffffffffffffffff', 0);
                     client.on('error', function(err) {
+                        assert.equal(err.code, 'NOSCRIPT');
                         assert(/NOSCRIPT No matching script. Please use EVAL./.test(err.message));
                         done();
                     });

test/commands/multi.spec.js

@@ -263,6 +263,7 @@ describe("The 'multi' method", function () {
                 it('reports multiple exceptions when they occur (while EXEC is running)', function (done) {
                     client.multi().config("bar").debug("foo").exec(function (err, reply) {
                         assert.strictEqual(reply.length, 2);
+                        assert.equal(reply[0].code, 'ERR');
                         assert(/^ERR/.test(reply[0].message), "Error message should begin with ERR");
                         assert(/^ERR/.test(reply[1].message), "Error message should begin with ERR");
                         return done();

test/commands/select.spec.js

@@ -57,7 +57,8 @@ describe("The 'select' method", function () {
                     describe("with a valid db index", function () {
                         it("selects the appropriate database", function (done) {
                             assert.strictEqual(client.selected_db, null, "default db should be null");
-                            client.select(1, function () {
+                            client.select(1, function (err) {
+                                assert.equal(err, null);
                                 assert.equal(client.selected_db, 1, "we should have selected the new valid DB");
                                 return done();
                             });
@@ -68,6 +69,7 @@ describe("The 'select' method", function () {
                         it("returns an error", function (done) {
                             assert.strictEqual(client.selected_db, null, "default db should be null");
                             client.select(9999, function (err) {
+                                assert.equal(err.code, 'ERR');
                                 assert.equal(err.message, 'ERR invalid DB index');
                                 return done();
                             });