test(hasOne): expand hasOne getter with transaction unit test

test/associations/has-one.test.js

@@ -29,6 +29,7 @@ describe(Support.getTestDialectTeaser("HasOne"), function() {
         Group.hasOne(User)
 
         sequelize.sync({ force: true }).success(function() {
+          User.create({ username: 'foo' }).success(function(fakeUser) {
             User.create({ username: 'foo' }).success(function(user) {
               Group.create({ name: 'bar' }).success(function(group) {
                 sequelize.transaction(function(t) {
@@ -38,7 +39,9 @@ describe(Support.getTestDialectTeaser("HasOne"), function() {
                         expect(associatedUser).to.be.null
                         Group.all({ transaction: t }).success(function(groups) {
                           groups[0].getUser({ transaction: t }).success(function(associatedUser) {
-                          expect(associatedUser).to.be.not.null
+                            expect(associatedUser).not.to.be.null
+                            expect(associatedUser.id).to.equal(user.id)
+                            expect(associatedUser.id).not.to.equal(fakeUser.id)
                             t.rollback().success(function() { done() })
                           })
                         })
@@ -51,6 +54,7 @@ describe(Support.getTestDialectTeaser("HasOne"), function() {
           })
         })
       })
+    })
 
     it('should be able to handle a where object that\'s a first class citizen.', function(done) {
       var User = this.sequelize.define('UserXYZ', { username: Sequelize.STRING })