test for on('failure', ...)

lib/sequelize/query.js

@@ -22,6 +22,7 @@ Query.prototype.run = function(query) {
   client.query(query, function(err, results, fields) {
     err ? self.onFailure(err) : self.onSuccess(query, results, fields)
   })
+  client.on('error', function(err) { self.onFailure(err) })
   client.end()
   
   return this

test/Model/sync.js

@@ -4,11 +4,19 @@ var assert = require("assert")
   , sequelize = new Sequelize(config.database, config.username, config.password)
 
 module.exports = {
-  'sync should work': function(beforeExit) {
+  'sync should work with correct database config': function(beforeExit) {
     var User = sequelize.define('User', {
       name: Sequelize.STRING,
       bio: Sequelize.TEXT
     })
     User.sync().on('success', beforeExit)
+  },
+  'sync should fail with incorrect database config': function(beforeExit) {
+    var s = new Sequelize('foo', 'bar', null)
+    var User = s.define('User', {
+      name: Sequelize.STRING,
+      bio: Sequelize.TEXT
+    })
+    User.sync().on('failure', beforeExit)
   }
 }
\ No newline at end of file