Added test for transaction support for `.addAssociation`

test/associations/has-many.test.js

@@ -265,6 +265,40 @@ describe(Support.getTestDialectTeaser("HasMany"), function() {
       })
       })
     })
     })
 
 
+    describe.only('addAssociations', function() {
+      it('supports transactions', function(done) {
+        Support.prepareTransactionTest(this.sequelize, function(sequelize) {
+          var Article = sequelize.define('Article', { 'title': DataTypes.STRING })
+            , Label   = sequelize.define('Label', { 'text': DataTypes.STRING })
+
+          Article.hasMany(Label)
+
+          sequelize.sync({ force: true }).success(function() {
+            Article.create({ title: 'foo' }).success(function(article) {
+              Label.create({ text: 'bar' }).success(function(label) {
+                sequelize.transaction(function(t) {
+                  article.addLabel(label, { transaction: t }).success(function() {
+                    Label
+                      .findAll({ where: { ArticleId: article.id }, transaction: undefined })
+                      .success(function(labels) {
+                        expect(labels.length).to.equal(0)
+
+                        Label
+                          .findAll({ where: { ArticleId: article.id }, transaction: t })
+                          .success(function(labels) {
+                            expect(labels.length).to.equal(1)
+                            t.rollback().success(function() { done() })
+                          })
+                      })
+                  })
+                })
+              })
+            })
+          })
+        })
+      })
+    })
+
     it("clears associations when passing null to the set-method with omitNull set to true", function(done) {
     it("clears associations when passing null to the set-method with omitNull set to true", function(done) {
       this.sequelize.options.omitNull = true
       this.sequelize.options.omitNull = true