Added an error for connections timing out. Updated Postgres connection manager t…

…o use the new errors.

lib/dialects/postgres/connection-manager.js

@@ -2,7 +2,8 @@
 var AbstractConnectionManager = require('../abstract/connection-manager')
   , ConnectionManager
   , Utils = require('../../utils')
-  , Promise = require('../../promise');
+  , Promise = require('../../promise')
+  , sequelizeErrors = require('../../errors');
 
 ConnectionManager = function(dialect, sequelize) {
   AbstractConnectionManager.call(this, dialect, sequelize);
@@ -56,19 +57,23 @@ ConnectionManager.prototype.connect = function(config) {
         if (err.code) {
           switch (err.code) {
           case 'ECONNREFUSED':
-            reject(new Error('Failed to authenticate for PostgresSQL. Please double check your settings.'));
+            reject(new sequelizeErrors.ConnectionRefusedError(err));
             break;
           case 'ENOTFOUND':
+            reject(new sequelizeErrors.HostNotFoundError(err));
+            break;
           case 'EHOSTUNREACH':
+            reject(new sequelizeErrors.HostNotReachableError(err));
+            break;
           case 'EINVAL':
-            reject(new Error('Failed to find PostgresSQL server. Please double check your settings.'));
+            reject(new sequelizeErrors.InvalidConnectionError(err));
             break;
           default:
-            reject(err);
+            reject(new sequelizeErrors.ConnectionError(err));
             break;
           }
         } else {
-          reject(new Error(err.message));
+          reject(new sequelizeErrors.ConnectionError(err));
         }
         return;
       }
@@ -79,7 +84,7 @@ ConnectionManager.prototype.connect = function(config) {
     // If we didn't ever hear from the client.connect() callback the connection timeout, node-postgres does not treat this as an error since no active query was ever emitted
     connection.on('end', function () {
       if (!responded) {
-        reject(new Error('Connection timed out'));
+        reject(new sequelizeErrors.ConnectionTimedOutError(new Error('Connection timed out')));
       }
     });
   }).tap(function (connection) {

lib/errors.js

@@ -169,6 +169,17 @@ error.InvalidConnectionError = function (parent) {
 util.inherits(error.InvalidConnectionError, error.ConnectionError);
 
 /**
+ * Thrown when a connection to a database times out
+ * @extends ConnectionError
+ * @constructor
+ */
+error.ConnectionTimedOutError = function (parent) {
+  error.ConnectionTimedOutError.call(this, parent);
+  this.name = 'SequelizeConnectionTimedOutError';
+};
+util.inherits(error.ConnectionTimedOutError, error.ConnectionError);
+
+/**
  * Thrown when a database query times out because of a deadlock
  * @extends DatabaseError
  * @constructor