Merge pull request #853 from fintura/eval

Remove bad .eval implementation

index.js

@@ -6,7 +6,6 @@ var net = require("net"),
     Queue = require("./lib/queue"),
     to_array = require("./lib/to_array"),
     events = require("events"),
-    crypto = require("crypto"),
     parsers = [],
     // This static list of commands is updated from time to time.
     // ./lib/commands.js can be updated with generate_commands.js
@@ -1078,37 +1077,6 @@ RedisClient.prototype.multi = RedisClient.prototype.MULTI = function (args) {
     return new Multi(this, args);
 };
 
-// stash original eval method
-var eval_orig = RedisClient.prototype.eval;
-// hook eval with an attempt to evalsha for cached scripts
-RedisClient.prototype.eval = RedisClient.prototype.EVAL = function () {
-    var self = this,
-        args = to_array(arguments),
-        callback;
-
-    if (typeof args[args.length - 1] === "function") {
-        callback = args.pop();
-    }
-
-    if (Array.isArray(args[0])) {
-        args = args[0];
-    }
-
-    // replace script source with sha value
-    var source = args[0];
-    args[0] = crypto.createHash("sha1").update(source).digest("hex");
-
-    self.evalsha(args, function (err, reply) {
-        if (err && /NOSCRIPT/.test(err.message)) {
-            args[0] = source;
-            eval_orig.call(self, args, callback);
-
-        } else if (callback) {
-            callback(err, reply);
-        }
-    });
-};
-
 var createClient_unix = function(path, options){
     var cnxOptions = {
         path: path

test/commands/eval.spec.js

@@ -12,6 +12,7 @@ describe("The 'eval' method", function () {
 
         describe("using " + parser + " and " + ip, function () {
             var client;
+            var source = "return redis.call('set', 'sha', 'test')";
 
             beforeEach(function (done) {
                 client = redis.createClient.apply(redis.createClient, args);
@@ -94,24 +95,25 @@ describe("The 'eval' method", function () {
                 });
             });
 
+            it('allows a script to be executed that accesses the redis API without callback', function (done) {
+                helper.serverVersionAtLeast.call(this, client, [2, 5, 0]);
+                client.eval(source, 0);
+                client.get('sha', helper.isString('test', done));
+            });
+
             describe('evalsha', function () {
-                var source = "return redis.call('get', 'sha test')";
                 var sha = crypto.createHash('sha1').update(source).digest('hex');
 
-                beforeEach(function (done) {
-                    client.set("sha test", "eval get sha test", function (err, res) {
-                        return done(err);
-                    });
-                });
-
                 it('allows a script to be executed that accesses the redis API', function (done) {
                     helper.serverVersionAtLeast.call(this, client, [2, 5, 0]);
-                    client.eval(source, 0, helper.isString('eval get sha test', done));
+                    client.eval(source, 0, helper.isString('OK'));
+                    client.get('sha', helper.isString('test', done));
                 });
 
                 it('can execute a script if the SHA exists', function (done) {
                     helper.serverVersionAtLeast.call(this, client, [2, 5, 0]);
-                    client.evalsha(sha, 0, helper.isString('eval get sha test', done));
+                    client.evalsha(sha, 0, helper.isString('OK'));
+                    client.get('sha', helper.isString('test', done));
                 });
 
                 it('returns an error if SHA does not exist', function (done) {
@@ -119,6 +121,15 @@ describe("The 'eval' method", function () {
                     client.evalsha('ffffffffffffffffffffffffffffffffffffffff', 0, helper.isError(done));
                 });
 
+                it('emit an error if SHA does not exist without any callback', function (done) {
+                    helper.serverVersionAtLeast.call(this, client, [2, 5, 0]);
+                    client.evalsha('ffffffffffffffffffffffffffffffffffffffff', 0);
+                    client.on('error', function(err) {
+                        assert(/NOSCRIPT No matching script. Please use EVAL./.test(err.message));
+                        done();
+                    });
+                });
+
                 it('emits an error if SHA does not exist and no callback has been provided', function (done) {
                     client.on('error', function (err) {
                         assert.equal(err.message, 'NOSCRIPT No matching script. Please use EVAL.');