Added a special test for syncing an enum table multiple times.

test/dao-factory.test.js

@@ -164,7 +164,7 @@ describe(Support.getTestDialectTeaser("DAOFactory"), function () {
       var UserTable = this.sequelize.define('UserCol', {
         aNumber: {
           type: Sequelize.INTEGER,
-          defaultValue: defaultFunction 
+          defaultValue: defaultFunction
         }
       }, { timestamps: true })
 
@@ -949,6 +949,22 @@ describe(Support.getTestDialectTeaser("DAOFactory"), function () {
           })
         })
       })
+
+      it('can safely sync multiple times', function(done) {
+        var Enum = this.sequelize.define('Enum', {
+          state: {
+            type: Sequelize.ENUM,
+            values: ['happy', 'sad'],
+            allowNull: true
+          }
+        })
+
+        Enum.sync({ force: true }).success(function() {
+          Enum.sync().success(function() {
+            Enum.sync({ force: true }).complete(done)
+          })
+        })
+      })
     })
   })