public void GetFoodItem() { var configurationMock = new Mock<IConfiguration>(); configurationMock.Setup( x => x.DataSource ).Returns( DataSourceType.XMLFile ); configurationMock.Setup( x => x.FileName ).Returns( FullTestData.DataFileName ); FullTestData.Reset(); HealthTracker.DataRepository.Services.DataRepository dataRepository = new HealthTracker.DataRepository.Services.DataRepository( configurationMock.Object ); // Request a food group that does not exist, should be null FoodItem item = dataRepository.GetFoodItem( Guid.NewGuid() ); Assert.IsNull( item ); // Request a food group that exists, show that a deep copy is returned // Find a food group that does exist, show that a deep copy is returned item = dataRepository.GetFoodItem( FullTestData.CheeseBurgerID ); Assert.AreEqual( "Deluxe Bacon Cheese Burger", item.Name ); Assert.AreEqual( FullTestData.CheeseBurgerID, item.ID ); FoodItem sameItem = dataRepository.GetFoodItem( FullTestData.CheeseBurgerID ); Assert.AreEqual( item.ID, sameItem.ID ); Assert.AreNotEqual( item, sameItem ); // Show deep copy // Verify that changes to the first found food group do not affect changes to what is logically // the same food group returned by the second find (IOW, show they are deep copies). item.Name = "Greasy and Bad for You"; Assert.AreEqual( "Greasy and Bad for You", item.Name ); Assert.AreEqual( "Deluxe Bacon Cheese Burger", sameItem.Name ); }