gistfile1.cs

[TestMethod]
        public void CanSaveAndDeleteAFunctionButNotTheApplication()
        {
            //Arrange
            Application myApp = new Application()
            {
                Description = "MyApp",
                KeyName = "MyApp",
                Name = "My App",
                Url = "http://www.myapp.com"
            };

            Function myFunc = new Function()
            {
                Application = myApp,
                Code = "MyFuncCode",
                Description = "My Func Desc"
            };

            //Act
            
            //Create the function with and Application
            _session.Save(myFunc);
            int myNewFuncId = myFunc.Id;
            _session.Flush();
            _session.Clear();

            //Retrieve the function and the Id of the application
            var myOldFunc = _session.Load<Function>(myNewFuncId);
            var myOldAppId = myOldFunc.Application.Id;
            
            //Now deletes the Function
            _session.Delete(myOldFunc);
            _session.Flush();
            _session.Clear();

            //And tries to load the application to make sure that
            //it was not deleted by cascade
            var myOldApp = _session.Load<Application>(myOldAppId);
            //The function must be null because I deleted it
            var myReallyOldFunc = _session.Get<Function>(myNewFuncId);

            //Assert                
            Assert.IsNotNull(myOldApp);
            Assert.AreEqual<int>(myOldAppId, myOldApp.Id);
            Assert.IsNull(myReallyOldFunc);
        }