static void OldWay()
{
// this is what is normally done, but not very good
ClassA instanceA = new ClassA();
// DynamicTYping
ClassC instanceC = new ClassC(instanceA);
int sum = instanceC.GetSum(2, 3);
}
public void TestGetSum()
{
//Create an mock of interface
Mock<IMyInterface> mock = new Mock<IMyInterface>();
// Create mock implementation of ImyInterface
mock.Setup(r => r.AddTwoNumbers(2, 3)).Returns(1000);
ClassC instanceC = new ClassC(mock.Object);
Assert.AreEqual(instanceC.GetSum(2, 3), 2000);
}
static void DI()
{
//Create container
UnityContainer container = new UnityContainer();
container.RegisterType<IMyInterface, ClassB>();
// Following code does not have depdency on ClassA or ClassB
IMyInterface implement = container.Resolve<IMyInterface>();
ClassC instanceC = new ClassC(implement);
int sum = instanceC.GetSum(2, 3);
}