public void DeviceGroup_WhenOneDeviceShutdown_AndRequestDeviceList_ThenReturnsActiveDevices()
{
var probe = CreateTestProbe();
var groupActor = Sys.ActorOf(DeviceGroup.Props(_defaultGroup, _secondsWaitingForReplies));
groupActor.Tell(new RequestTrackDevice(_defaultGroup, "device1"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
var toShutDown = probe.LastSender;
groupActor.Tell(new RequestTrackDevice(_defaultGroup, "device2"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
groupActor.Tell(new RequestDeviceList(requestId: 0), probe.Ref);
probe.ExpectMsg <ReplyDeviceList>(s =>
s.RequestId == 0 && s.Ids.Contains("device1") && s.Ids.Contains("device2"));
probe.Watch(toShutDown);
toShutDown.Tell(PoisonPill.Instance);
probe.ExpectTerminated(toShutDown);
// using awaitAssert to retry because it might take longer for the groupActor
// to see the Terminated, that order is undefined
probe.AwaitAssert(() =>
{
groupActor.Tell(new RequestDeviceList(requestId: 1), probe.Ref);
probe.ExpectMsg <ReplyDeviceList>(s =>
s.RequestId == 1 && s.Ids.Count == 1 && s.Ids.Contains("device2"));
});
}
public void Device_group_must_return_temperature_for_all_devices()
{
var probe = CreateTestProbe();
var groupActor = Sys.ActorOf(DeviceGroup.Props("group1"));
groupActor.Tell(new RequestTrackDevice("group1", "device1"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>(o => true);
var deviceActor1 = probe.LastSender;
groupActor.Tell(new RequestTrackDevice("group1", "device2"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
var deviceActor2 = probe.LastSender;
groupActor.Tell(new RequestTrackDevice("group1", "device3"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
var deviceActor3 = probe.LastSender;
deviceActor1.Tell(new RecordTemperature(requestId: 1, value: 25.0), probe.Ref);
probe.ExpectMsg <TemperatureRecorded>(r => r.RequestId == 1);
deviceActor2.Tell(new RecordTemperature(requestId: 2, value: 75.0), probe.Ref);
probe.ExpectMsg <TemperatureRecorded>(r => r.RequestId == 2);
// Get all devices temperature.
groupActor.Tell(new RequestAllTemperatures(requestId: 3), probe.Ref);
probe.ExpectMsg <RespondAllTemperatures>(
r => r.Temperatures["device1"].AsInstanceOf <Temperature>().Value == 25.0 &&
r.Temperatures["device2"].AsInstanceOf <Temperature>().Value == 75.0 &&
r.Temperatures["device3"] is TemperatureNotAvailable &&
r.RequestId == 3
);
}
public void DeviceGroup_actor_must_be_able_to_collect_temperatures_from_all_active_devices()
{
var probe = CreateTestProbe();
var groupActor = Sys.ActorOf(DeviceGroup.Props("group"));
groupActor.Tell(new RequestTrackDevice("group", "device1"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
var deviceActor1 = probe.LastSender;
groupActor.Tell(new RequestTrackDevice("group", "device2"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
var deviceActor2 = probe.LastSender;
groupActor.Tell(new RequestTrackDevice("group", "device3"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
var deviceActor3 = probe.LastSender;
// Check that the device actors are working
deviceActor1.Tell(new RecordTemperature(requestId: 0, value: 1.0), probe.Ref);
probe.ExpectMsg <TemperatureRecorded>(s => s.RequestId == 0);
deviceActor2.Tell(new RecordTemperature(requestId: 1, value: 2.0), probe.Ref);
probe.ExpectMsg <TemperatureRecorded>(s => s.RequestId == 1);
// No temperature for device3
groupActor.Tell(new RequestAllTemperatures(0), probe.Ref);
probe.ExpectMsg <RespondAllTemperatures>(msg =>
msg.Temperatures["device1"].AsInstanceOf <Temperature>().Value == 1.0 &&
msg.Temperatures["device2"].AsInstanceOf <Temperature>().Value == 2.0 &&
msg.Temperatures["device3"] is TemperatureNotAvailable &&
msg.RequestId == 0);
}
public void DeviceGroup_actor_must_be_able_to_list_active_devices_after_one_shuts_down()
{
var probe = CreateTestProbe();
var groupActor = Sys.ActorOf(DeviceGroup.Props("group"));
groupActor.Tell(new RequestTrackDevice("group", "device1"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
var toShutDown = probe.LastSender;
groupActor.Tell(new RequestTrackDevice("group", "device2"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
groupActor.Tell(new RequestDeviceList(requestId: 0), probe.Ref);
probe.ExpectMsg <ReplyDeviceList>(s => s.RequestId == 0 &&
s.Ids.Contains("device1") &&
s.Ids.Contains("device2"));
probe.Watch(toShutDown);
toShutDown.Tell(PoisonPill.Instance);
probe.ExpectTerminated(toShutDown);
// using awaitAssert to retry because it might take longer for the groupActor
// to see the Terminated, that order is undefined
probe.AwaitAssert(() =>
{
groupActor.Tell(new RequestDeviceList(requestId: 1), probe.Ref);
probe.ExpectMsg <ReplyDeviceList>(s => s.RequestId == 1 && s.Ids.Contains("device2"));
});
}
protected override void OnReceive(object message)
{
switch (message)
{
case RequestTrackDevice trackMsg:
if (groupIdToActor.TryGetValue(trackMsg.GroupId, out var actorRef))
{
actorRef.Forward(trackMsg);
}
else
{
Log.Info($"Creating device group actor for {trackMsg.GroupId}");
var groupActor = Context.ActorOf(DeviceGroup.Props(trackMsg.GroupId), $"group-{trackMsg.GroupId}");
Context.Watch(groupActor);
groupActor.Forward(trackMsg);
groupIdToActor.Add(trackMsg.GroupId, groupActor);
actorToGroupId.Add(groupActor, trackMsg.GroupId);
}
break;
case Terminated t:
var groupId = actorToGroupId[t.ActorRef];
Log.Info($"Device group actor for {groupId} has been terminated");
actorToGroupId.Remove(t.ActorRef);
groupIdToActor.Remove(groupId);
break;
}
}
public void DeviceGroup_actor_must_ignore_requests_for_wrong_groupId()
{
var probe = CreateTestProbe();
var groupActor = Sys.ActorOf(DeviceGroup.Props("group"));
groupActor.Tell(new RequestTrackDevice("wrongGroup", "device1"), probe.Ref);
probe.ExpectNoMsg(TimeSpan.FromMilliseconds(500));
}
public void Device_group_should_ignore_device_registration_requests_with_wrong_group_id()
{
var probe = CreateTestProbe();
var groupActor = Sys.ActorOf(DeviceGroup.Props("Group1"));
groupActor.Tell(new RequestTrackDevice("Group2", "Device1"), probe.Ref);
probe.ExpectNoMsg(TimeSpan.FromMilliseconds(value: 500));
}
public void DeviceGroup_WhenRequestTrackDeviceWithGroupId_ThenActorIgnoresRequest()
{
var probe = CreateTestProbe();
var groupActor = Sys.ActorOf(DeviceGroup.Props(_defaultGroup, _secondsWaitingForReplies));
groupActor.Tell(new RequestTrackDevice("wrongGroup", "device1"), probe.Ref);
probe.ExpectNoMsg(TimeSpan.FromMilliseconds(500));
}
public void DeviceGroup_actor_must_be_able_to_list_active_devices()
{
var probe = CreateTestProbe();
var groupActor = Sys.ActorOf(DeviceGroup.Props("group"));
groupActor.Tell(new RequestTrackDevice("group", "device1"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
groupActor.Tell(new RequestTrackDevice("group", "device2"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
groupActor.Tell(new RequestDeviceList(requestId: 0), probe.Ref);
probe.ExpectMsg <ReplyDeviceList>(s => s.RequestId == 0 && s.Ids.Contains("device1") && s.Ids.Contains("device2"));
}
public void DeviceGroup_actor_must_return_same_actor_for_same_deviceId()
{
var probe = CreateTestProbe();
var groupActor = Sys.ActorOf(DeviceGroup.Props("group"));
groupActor.Tell(new RequestTrackDevice("group", "device1"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
var deviceActor1 = probe.LastSender;
groupActor.Tell(new RequestTrackDevice("group", "device1"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
var deviceActor2 = probe.LastSender;
deviceActor1.Should().Be(deviceActor2);
}
public void DeviceGroup_WhenMultipleRequestTrackDeviceForSameDevice_ThenReturnsSameActor()
{
var probe = CreateTestProbe();
var groupActor = Sys.ActorOf(DeviceGroup.Props(_defaultGroup, _secondsWaitingForReplies));
groupActor.Tell(new RequestTrackDevice(_defaultGroup, "device1"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
var deviceActor1 = probe.LastSender;
groupActor.Tell(new RequestTrackDevice(_defaultGroup, "device1"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
var deviceActor2 = probe.LastSender;
deviceActor1.Should().Be(deviceActor2);
}
public void Device_group_should_return_the_same_actor_for_the_same_device_id()
{
var probe = CreateTestProbe();
var groupActor = Sys.ActorOf(DeviceGroup.Props("Group1"));
groupActor.Tell(new RequestTrackDevice("Group1", "Device1"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
var device1Actor = probe.LastSender;
groupActor.Tell(new RequestTrackDevice("Group1", "Device1"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
var device2Actor = probe.LastSender;
device2Actor.ShouldBe(device1Actor);
}
public void DeviceGroup_WhenRequestDeviceListAndMultipleRegistered_ThenReturnsThem()
{
var probe = CreateTestProbe();
var groupActor = Sys.ActorOf(DeviceGroup.Props(_defaultGroup, _secondsWaitingForReplies));
groupActor.Tell(new RequestTrackDevice(_defaultGroup, "device1"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
groupActor.Tell(new RequestTrackDevice(_defaultGroup, "device2"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
groupActor.Tell(new RequestDeviceList(requestId: 0), probe.Ref);
probe.ExpectMsg <ReplyDeviceList>(s => s.RequestId == 0 &&
s.Ids.Contains("device1") &&
s.Ids.Contains("device2"));
}
public void Device_group_should_be_able_to_list_devices()
{
var probe = CreateTestProbe();
var groupActor = Sys.ActorOf(DeviceGroup.Props("Group1"));
var deviceIds = new HashSet <string> {
"Device1", "Device2"
};
foreach (var deviceId in deviceIds)
{
groupActor.Tell(new RequestTrackDevice("Group1", deviceId), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
}
groupActor.Tell(new RequestDeviceList(requestId: 128), probe.Ref);
probe.ExpectMsg <ReplyDeviceList>(r => r.RequestId == 128 && deviceIds.SetEquals(r.DeviceIds));
}
public void DeviceGroup_actor_must_be_able_to_list_active_devices()
{
var sys = ActorSystem.Create("mysys");
var probe = new TestKit().CreateTestProbe();
var groupActor = sys.ActorOf(DeviceGroup.Props("group"));
groupActor.Tell(new RequestTrackDevice("group", "device1"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
var device1 = probe.LastSender;
groupActor.Tell(new RequestTrackDevice("group", "device2"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
var device2 = probe.LastSender;
groupActor.Tell(new RequestDeviceList(requestId: 0), probe.Ref);
probe.ExpectMsg <ReplyDeviceList>(rep => rep.RequestId == 0 &&
rep.Ids.Contains("device1") && rep.Ids.Contains("device2"));
}
public void DeviceGroup_WhenRequestTrackDevice_ThenDeviceActorRegistered()
{
var probe = CreateTestProbe();
var groupActor = Sys.ActorOf(DeviceGroup.Props(_defaultGroup, _secondsWaitingForReplies));
groupActor.Tell(new RequestTrackDevice(_defaultGroup, "device1"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
var deviceActor1 = probe.LastSender;
groupActor.Tell(new RequestTrackDevice(_defaultGroup, "device2"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
var deviceActor2 = probe.LastSender;
deviceActor1.Should().NotBe(deviceActor2);
// Check that the device actors are working
deviceActor1.Tell(new RecordTemperature(requestId: 0, value: 1.0), probe.Ref);
probe.ExpectMsg <TemperatureRecorded>(s => s.RequestId == 0);
deviceActor2.Tell(new RecordTemperature(requestId: 1, value: 2.0), probe.Ref);
probe.ExpectMsg <TemperatureRecorded>(s => s.RequestId == 1);
}
public void Device_group_should_accept_device_registration_requests()
{
var probe = CreateTestProbe();
var groupActor = Sys.ActorOf(DeviceGroup.Props("Group1"));
groupActor.Tell(new RequestTrackDevice("Group1", "Device1"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
var device1Actor = probe.LastSender;
groupActor.Tell(new RequestTrackDevice("Group1", "Device2"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
var device2Actor = probe.LastSender;
device2Actor.ShouldNotBe(device1Actor);
// Check that devices are working.
device1Actor.Tell(new RecordTemperature(requestId: 55, value: 42.0), probe.Ref);
probe.ExpectMsg <TemperatureRecorded>(r => r.RequestId == 55);
device2Actor.Tell(new RecordTemperature(requestId: 56, value: 42.0), probe.Ref);
probe.ExpectMsg <TemperatureRecorded>(r => r.RequestId == 56);
}
public void DeviceGroup_actor_must_be_able_to_register_a_device_actor()
{
var probe = CreateTestProbe();
var groupActor = Sys.ActorOf(DeviceGroup.Props("group"));
groupActor.Tell(new RequestTrackDevice("group", "device1"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
var deviceActor1 = probe.LastSender;
groupActor.Tell(new RequestTrackDevice("group", "device2"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
var deviceActor2 = probe.LastSender;
deviceActor1.Should().NotBe(deviceActor2);
// Check that the device actors are working
deviceActor1.Tell(new RecordTemperature(requestId: 0, value: 1.0), probe.Ref);
probe.ExpectMsg <TemperatureRecorded>(s => s.RequestId == 0);
deviceActor2.Tell(new RecordTemperature(requestId: 1, value: 2.0), probe.Ref);
probe.ExpectMsg <TemperatureRecorded>(s => s.RequestId == 1);
}
public void Device_group_should_be_able_to_list_devices_after_one_shutdown()
{
var probe = CreateTestProbe();
var groupActor = Sys.ActorOf(DeviceGroup.Props("Group1"));
var deviceIds = new HashSet <string> {
"Device1", "Device2"
};
var deviceToShutdownId = deviceIds.First();
IActorRef deviceToShutdown = null;
foreach (var deviceId in deviceIds)
{
groupActor.Tell(new RequestTrackDevice("Group1", deviceId), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
if (deviceId == deviceToShutdownId)
{
deviceToShutdown = probe.LastSender;
}
}
// Check devices after registration.
groupActor.Tell(new RequestDeviceList(requestId: 128), probe.Ref);
probe.ExpectMsg <ReplyDeviceList>(r => r.RequestId == 128 && deviceIds.SetEquals(r.DeviceIds));
deviceIds.Remove(deviceToShutdownId);
probe.Watch(deviceToShutdown);
deviceToShutdown.Tell(PoisonPill.Instance);
probe.ExpectTerminated(deviceToShutdown);
// Check devices after termination.
probe.AwaitAssert(() =>
{
groupActor.Tell(new RequestDeviceList(requestId: 129), probe.Ref);
probe.ExpectMsg <ReplyDeviceList>(r => r.RequestId == 129 && deviceIds.SetEquals(r.DeviceIds));
});
}
static void Main(string[] args)
{
TestKit testKit = new TestKit();
ActorSystem actorSystem = testKit.Sys;
using (actorSystem)
{
TestProbe probe = testKit.CreateTestProbe("test-probe");
Action test1 = new Action(() =>
{
IActorRef groupActor = actorSystem.ActorOf(DeviceGroup.Props("group"));
groupActor.Tell(new RequestTrackDevice("group", "device1"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
IActorRef deviceActor1 = probe.LastSender;
groupActor.Tell(new RequestTrackDevice("group", "device2"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
IActorRef deviceActor2 = probe.LastSender;
deviceActor1.Should().NotBe(deviceActor2);
// Check that the device actors are working
deviceActor1.Tell(new RecordTemperature(requestId: 0, value: 1.0), probe.Ref);
probe.ExpectMsg <TemperatureRecorded>(s => s.RequestId == 0);
deviceActor2.Tell(new RecordTemperature(requestId: 1, value: 2.0), probe.Ref);
probe.ExpectMsg <TemperatureRecorded>(s => s.RequestId == 1);
Console.WriteLine("Test 1 passed.");
Console.WriteLine("");
});
test1.Invoke();
Action test2 = new Action(() =>
{
IActorRef groupActor = actorSystem.ActorOf(DeviceGroup.Props("group"));
groupActor.Tell(new RequestTrackDevice("wrongGroup", "device1"), probe.Ref);
probe.ExpectNoMsg(TimeSpan.FromMilliseconds(500));
Console.WriteLine("Test 2 passed.");
Console.WriteLine("");
});
test2.Invoke();
/*It might be, that a device actor already exists for the registration request.
* In this case, we would like to use the existing actor instead of a new one.
* We have not tested this yet, so we need to fix this:*/
Action test3 = new Action(() =>
{
IActorRef groupActor = actorSystem.ActorOf(DeviceGroup.Props("group"));
groupActor.Tell(new RequestTrackDevice("group", "device1"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
IActorRef deviceActor1 = probe.LastSender;
groupActor.Tell(new RequestTrackDevice("group", "device1"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
IActorRef deviceActor2 = probe.LastSender;
deviceActor1.Should().Be(deviceActor2);
Console.WriteLine("Test 3 passed.");
Console.WriteLine("");
});
test3.Invoke();
Console.WriteLine("UserMessage: App is finished.");
// Exit the system after ENTER is pressed
Console.ReadLine();
}
}
static void Main(string[] args)
{
TestKit testKit = new TestKit();
ActorSystem actorSystem = testKit.Sys;
using (actorSystem)
{
TestProbe probe = testKit.CreateTestProbe("test-probe");
Action test1 = new Action(() =>
{
IActorRef groupActor = actorSystem.ActorOf(DeviceGroup.Props("group"));
groupActor.Tell(new RequestTrackDevice("group", "device1"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
IActorRef deviceActor1 = probe.LastSender;
groupActor.Tell(new RequestTrackDevice("group", "device2"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
IActorRef deviceActor2 = probe.LastSender;
deviceActor1.Should().NotBe(deviceActor2);
// Check that the device actors are working
deviceActor1.Tell(new RecordTemperature(requestId: 0, value: 1.0), probe.Ref);
probe.ExpectMsg <TemperatureRecorded>(s => s.RequestId == 0);
deviceActor2.Tell(new RecordTemperature(requestId: 1, value: 2.0), probe.Ref);
probe.ExpectMsg <TemperatureRecorded>(s => s.RequestId == 1);
Console.WriteLine("Test 1 passed.");
Console.WriteLine("");
});
test1.Invoke();
Action test2 = new Action(() =>
{
IActorRef groupActor = actorSystem.ActorOf(DeviceGroup.Props("group"));
groupActor.Tell(new RequestTrackDevice("wrongGroup", "device1"), probe.Ref);
probe.ExpectNoMsg(TimeSpan.FromMilliseconds(500));
Console.WriteLine("Test 2 passed.");
Console.WriteLine("");
});
test2.Invoke();
/*It might be, that a device actor already exists for the registration request.
* In this case, we would like to use the existing actor instead of a new one.
* We have not tested this yet, so we need to fix this:*/
Action test3 = new Action(() =>
{
IActorRef groupActor = actorSystem.ActorOf(DeviceGroup.Props("group"));
groupActor.Tell(new RequestTrackDevice("group", "device1"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
IActorRef deviceActor1 = probe.LastSender;
groupActor.Tell(new RequestTrackDevice("group", "device1"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
IActorRef deviceActor2 = probe.LastSender;
deviceActor1.Should().Be(deviceActor2);
Console.WriteLine("Test 3 passed.");
Console.WriteLine("");
});
test3.Invoke();
/*In the first, we just test that we get back the list of
* proper IDs once we have added a few devices.*/
Action test4 = new Action(() =>
{
IActorRef groupActor = actorSystem.ActorOf(DeviceGroup.Props("group"));
groupActor.Tell(new RequestTrackDevice("group", "device1"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
groupActor.Tell(new RequestTrackDevice("group", "device2"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
groupActor.Tell(new RequestDeviceList(requestId: 0), probe.Ref);
probe.ExpectMsg <ReplyDeviceList>(s => s.RequestId == 0 &&
s.Ids.Contains("device1") &&
s.Ids.Contains("device2"));
Console.WriteLine("Test 4 passed.");
Console.WriteLine("");
});
test4.Invoke();
/*The second test case makes sure that the device ID
* is properly removed after the device actor has been stopped.*/
Action test5 = new Action(() =>
{
IActorRef groupActor = actorSystem.ActorOf(DeviceGroup.Props("group"));
groupActor.Tell(new RequestTrackDevice("group", "device1"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
IActorRef toShutDown = probe.LastSender;
groupActor.Tell(new RequestTrackDevice("group", "device2"), probe.Ref);
probe.ExpectMsg <DeviceRegistered>();
groupActor.Tell(new RequestDeviceList(requestId: 0), probe.Ref);
probe.ExpectMsg <ReplyDeviceList>(s => s.RequestId == 0 &&
s.Ids.Contains("device1") &&
s.Ids.Contains("device2"));
probe.Watch(toShutDown);
toShutDown.Tell(PoisonPill.Instance);
probe.ExpectTerminated(toShutDown);
// using awaitAssert to retry because it might take longer for the groupActor
// to see the Terminated, that order is undefined
probe.AwaitAssert(() =>
{
groupActor.Tell(new RequestDeviceList(requestId: 1), probe.Ref);
probe.ExpectMsg <ReplyDeviceList>(s => s.RequestId == 1 && s.Ids.Contains("device2"));
});
Console.WriteLine("Test 5 passed.");
Console.WriteLine("");
});
test5.Invoke();
Console.WriteLine("UserMessage: App is finished.");
// Exit the system after ENTER is pressed
Console.ReadLine();
}
}