feat: emit authentication related errors with "error" event

BREAKING CHANGE:

Authentication related errors are emited with "error" event,
instead of "authError" event

Author: luin

README.md

@@ -563,7 +563,6 @@ Besides the above connection events, there are several other custom events:
 
 Event    | Description
 :------------- | :-------------
-authError | emits when the password specified in the options is wrong or the server doesn't require a password.
 select   | emits when the database changed. The argument is the new db number.
 
 ## Offline Queue

lib/redis/event_handler.js

@@ -14,7 +14,7 @@ exports.connectHandler = function (self) {
     if (self.condition.auth) {
       self.auth(self.condition.auth, function (err) {
         if (err) {
-          self.emit('authError', err);
+          self.silentEmit('error', err);
         }
       });
     }
@@ -34,7 +34,7 @@ exports.connectHandler = function (self) {
         if (err) {
           self.flushQueue(new Error('Ready check failed: ' + err.message));
           if (!self.condition.auth && err.message.split(' ')[0] === 'NOAUTH') {
-            self.emit('authError', err);
+            self.silentEmit('error', err);
           }
         } else {
           self.serverInfo = info;

test/functional/auth.js

@@ -41,44 +41,44 @@ describe('auth', function () {
     });
   });
 
-  it('should emit "authError" when the server doesn\'t need auth', function (done) {
+  it('should emit "error" when the server doesn\'t need auth', function (done) {
     var server = new MockServer(17379, function (argv) {
       if (argv[0] === 'auth' && argv[1] === 'pass') {
         return new Error('ERR Client sent AUTH, but no password is set');
       }
     });
     var redis = new Redis({ port: 17379, password: 'pass' });
-    redis.on('authError', function (error) {
+    redis.on('error', function (error) {
       expect(error).to.have.property('message', 'ERR Client sent AUTH, but no password is set');
       redis.disconnect();
       server.disconnect();
       done();
     });
   });
 
-  it('should emit "authError" when the password is wrong', function (done) {
+  it('should emit "error" when the password is wrong', function (done) {
     var server = new MockServer(17379, function (argv) {
       if (argv[0] === 'auth' && argv[1] === 'pass') {
         return new Error('ERR invalid password');
       }
     });
     var redis = new Redis({ port: 17379, password: 'pass' });
-    redis.on('authError', function (error) {
+    redis.on('error', function (error) {
       expect(error).to.have.property('message', 'ERR invalid password');
       redis.disconnect();
       server.disconnect();
       done();
     });
   });
 
-  it('should emit "authError" when password is not provided', function (done) {
+  it('should emit "error" when password is not provided', function (done) {
     var server = new MockServer(17379, function (argv) {
       if (argv[0] === 'info') {
         return new Error('NOAUTH Authentication required.');
       }
     });
     var redis = new Redis({ port: 17379 });
-    redis.on('authError', function (error) {
+    redis.on('error', function (error) {
       expect(error).to.have.property('message', 'NOAUTH Authentication required.');
       redis.disconnect();
       server.disconnect();