private void AddData_SwitchValueOf15_ShouldAddToStorageTwo()
    {
        // Mock the repository then add it to the service
        Mock <IRepository> mockRepository = new Mock <IRepository>();
        MyService          service        = new MyService
        {
            Repository = mockRepository
        };

        MyDataObject myDataObject = new MyDataObject();

        // Assign some data to myDataObject

        // This should insert myDataObject into StorageTwo
        service.AddData(myDataObject, 15);

        // Check that the correct method was called once, with our parameter
        mockRepository.Verify(r => r.AddToStorageTwo(myDataObject), Times.Once());
        // Check that the other methods were never called, with any input
        mockRepository.Verify(r => r.AddToStorageOne(It.IsAny <MyDataObject>()), Times.Never());
        mockRepository.Verify(r => r.AddToStorageThree(It.IsAny <MyDataObject>()), Times.Never());
    }