public void ReadAllDronesEnsureRepositoryIsCalled()
{
var droneRepo = new Mock <IDroneRepository>();
IDroneService service = new DroneService(droneRepo.Object);
var isCalled = false;
var filter = new Filter();
droneRepo.Setup(x => x.GetAllDrones(filter)).Callback(() => isCalled = true)
.Returns(new FilteredList <Drone>());
service.GetAllDrones(filter);
Assert.True(isCalled);
}