using System;
using System.Threading;
using System.Threading.Tasks;
using Newtonsoft.Json;
using NSubstitute;
using NUnit.Framework;
using TINK.Model;
using TINK.Model.Bikes.BikeInfoNS.BluetoothLock;
using TINK.Model.Connector;
using TINK.Model.Device;
using TINK.Model.State;
using TINK.Model.User;
using TINK.Repository.Exception;
using TINK.Repository.Request;
using TINK.Repository.Response;
using TINK.Services.BluetoothLock;
using TINK.Services.BluetoothLock.Exception;
using TINK.Services.BluetoothLock.Tdo;
using TINK.Services.Geolocation;
using TINK.View;
using TINK.ViewModel;
using TINK.ViewModel.Bikes;
using TINK.ViewModel.Bikes.Bike.BluetoothLock.RequestHandler;

namespace TestTINKLib.Fixtures.ObjectTests.ViewModel.Bikes.Bike.BluetoothLock.RequestHandler
{
	[TestFixture]
	public class TestBookedClosed
	{
		/// <summary>
		/// Test construction of object.
		/// </summary>
		[Test]
		public void Testctor()
		{
			var handler = new BookedClosed(
				Substitute.For<IBikeInfoMutable>(),
				() => true, // isConnectedDelegate
				(isConnexted) => Substitute.For<IConnector>(),
				Substitute.For<IGeolocation>(),
				Substitute.For<ILocksService>(),
				() => Substitute.For<IPollingUpdateTaskManager>(),
				Substitute.For<ISmartDevice>(),
				Substitute.For<IViewService>(),
				Substitute.For<IBikesViewModel>(),
				Substitute.For<IUser>());

			// Verify prerequisites.
			//Assert.AreEqual("Return bike", handler.ButtonText);
			//Assert.IsTrue(handler.IsButtonVisible);
			Assert.AreEqual("Open lock", handler.LockitButtonText);
			Assert.IsTrue(handler.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Return bike.
		/// Comment: User deceide to abort returning bike
		/// Final state: Same as initial state.
		/// </summary>
		[Test]
		public void TestReturnCancel()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedClosed(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			bike.Id.Returns("0");

			viewService.DisplayAlert(string.Empty, "Return bike Nr. 0?", "Yes", "No").Returns(Task.FromResult(false));

			var subsequent = handler.HandleRequestOption1().Result;

			locks.DidNotReceive().DisconnectAsync(Arg.Any<int>(), Arg.Any<Guid>());

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				viewService.DisplayAlert(string.Empty, "Return bike Nr. 0?", "Yes", "No");
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state after action
			//Assert.AreEqual("Return bike", subsequent.ButtonText);
			//Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Open lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Return bike.
		/// Final state: Disposable closed
		/// </summary>
		[Test]
		public void TestReturnOutOfReach()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedClosed(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			bike.Id.Returns("0");

			viewService.DisplayAlert(string.Empty, "Return bike Nr. 0?", "Yes", "No").Returns(Task.FromResult(true));

			locks[0].GetDeviceState().Returns(DeviceState.Disconnected); // Simulate bike out of reach. 

			bike.State.Value.Returns(InUseStateEnum.Disposable); // Reqesthandler factory queries state to create appropriate request handler object.

			var subsequent = handler.HandleRequestOption1().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Returning bike...";
				connector.Command.DoReturn(bike, Arg.Is<LocationDto>(x => x == null));
				bikesViewModel.ActionText = "Disconnecting lock...";
				locks.DisconnectAsync(Arg.Any<int>(), Arg.Any<Guid>());
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = "";
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state after action
			Assert.AreEqual("Reserve bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("DisposableDisconnected", subsequent.LockitButtonText);
			Assert.IsFalse(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Return bike.
		/// Final state: Disposable closed
		/// </summary>
		[Test]
		public void TestReturnLockInReach()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedClosed(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			bike.Id.Returns("0");

			viewService.DisplayAlert(string.Empty, "Return bike Nr. 0?", "Yes", "No").Returns(Task.FromResult(true));

			locks[0].GetDeviceState().Returns(DeviceState.Connected); // Simulate bike in reach. If bike is out of reach bluetooth state changes to unknown.

			geolocation.GetAsync(Arg.Any<CancellationToken?>(), Arg.Any<DateTime>()).Returns(Task.FromResult(
				new Xamarin.Essentials.Location(7, 9)
				));

			bike.State.Value.Returns(InUseStateEnum.Disposable); // Reqesthandler factory queries state to create appropriate request handler object.
			bike.LockInfo.State.Returns(LockingState.Closed); // Requsthandler factory queries lock state to create appropriate request handler object.

			var subsequent = handler.HandleRequestOption1().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				geolocation.GetAsync(Arg.Any<CancellationToken?>(), Arg.Any<DateTime>());
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Query location...";
				bikesViewModel.ActionText = "Returning bike...";
				connector.Command.DoReturn(bike, Arg.Is<LocationDto>(x => x != null));
				bikesViewModel.ActionText = "Disconnecting lock...";
				locks.DisconnectAsync(Arg.Any<int>(), Arg.Any<Guid>());
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = "";
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state after action
			Assert.AreEqual("Reserve bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("DisposableDisconnected", subsequent.LockitButtonText);
			Assert.IsFalse(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Return bike.
		/// Final state: Disposable closed
		/// </summary>
		[Test]
		public void TestReturnLockInReachNoGeolocation()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedClosed(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			bike.Id.Returns("0");

			viewService.DisplayAlert(string.Empty, "Return bike Nr. 0?", "Yes", "No").Returns(Task.FromResult(true));

			locks[0].GetDeviceState().Returns(DeviceState.Connected); // Simulate bike in reach. If bike is out of reach bluetooth state changes to unknown.

			geolocation.GetAsync(Arg.Any<CancellationToken?>(), Arg.Any<DateTime>()).Returns<Xamarin.Essentials.Location>(x => throw new Exception());

			bike.State.Value.Returns(InUseStateEnum.Disposable); // Reqesthandler factory queries state to create appropriate request handler object.
			bike.LockInfo.State.Returns(LockingState.Closed); // Requsthandler factory queries lock state to create appropriate request handler object.

			var subsequent = handler.HandleRequestOption1().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				geolocation.GetAsync(Arg.Any<CancellationToken?>(), Arg.Any<DateTime>());
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Query location...";
				bikesViewModel.ActionText = "Returning bike...";
				connector.Command.DoReturn(bike, Arg.Is<LocationDto>(x => x == null));
				bikesViewModel.ActionText = "Disconnecting lock...";
				locks.DisconnectAsync(Arg.Any<int>(), Arg.Any<Guid>());
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = "";
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state after action
			Assert.AreEqual("Reserve bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("DisposableDisconnected", subsequent.LockitButtonText);
			Assert.IsFalse(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Return bike.
		/// Final state: Same as initial state.
		/// </summary>
		[Test]
		public void TestReturnReturnFailsWebConnectFailureException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedClosed(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			bike.Id.Returns("0");

			viewService.DisplayAlert(string.Empty, "Return bike Nr. 0?", "Yes", "No").Returns(Task.FromResult(true));

			locks[0].GetDeviceState().Returns(DeviceState.Connected); // Simulate bike in reach. If bike is out of reach bluetooth state changes to unknown.

			connector.Command.DoReturn(bike, Arg.Any<LocationDto>()).Returns<BookingFinishedModel>(x => throw new WebConnectFailureException("Context info", new Exception("hoppla")));

			bike.State.Value.Returns(InUseStateEnum.Booked); // Reqesthandler factory queries state to create appropriate request handler object.
			bike.LockInfo.State.Returns(LockingState.Closed); // Requsthandler factory queries lock state to create appropriate request handler object.

			var subsequent = handler.HandleRequestOption1().Result;

			locks.DidNotReceive().DisconnectAsync(Arg.Any<int>(), Arg.Any<Guid>());

			locks.DidNotReceive().DisconnectAsync(Arg.Any<int>(), Arg.Any<Guid>());

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Returning bike...";
				connector.Command.DoReturn(bike, Arg.Any<LocationDto>());
				bikesViewModel.ActionText = "";
				viewService.DisplayAdvancedAlert(
					"Connection error when returning the bike!",
					"Internet must be available when returning the bike.\r\nIs WIFI available/ mobile network available and mobile data activated / ... ?",
					"Context info",
					"OK");
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = "";
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state after action
			//Assert.AreEqual("Return bike", subsequent.ButtonText);
			//Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Open lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Return bike.
		/// Final state: Same as initial state.
		/// </summary>
		[Test]
		public void TestReturnReturnFailsNotAtStationException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedClosed(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			bike.Id.Returns("0");

			viewService.DisplayAlert(string.Empty, "Return bike Nr. 0?", "Yes", "No").Returns(Task.FromResult(true));

			locks[0].GetDeviceState().Returns(DeviceState.Connected); // Simulate bike in reach. If bike is out of reach bluetooth state changes to unknown.

			NotAtStationException.IsNotAtStation("Failure 2178: bike 1545 out of GEO fencing. 15986 meter distance to next station 42. OK: bike 1545 locked confirmed", out NotAtStationException notAtStationException);

			connector.Command.DoReturn(bike, Arg.Any<LocationDto>()).Returns<BookingFinishedModel>(x =>
				throw notAtStationException);

			bike.State.Value.Returns(InUseStateEnum.Booked); // Reqesthandler factory queries state to create appropriate request handler object.
			bike.LockInfo.State.Returns(LockingState.Closed); // Requsthandler factory queries lock state to create appropriate request handler object.

			var subsequent = handler.HandleRequestOption1().Result;

			locks.DidNotReceive().DisconnectAsync(Arg.Any<int>(), Arg.Any<Guid>());

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Returning bike...";
				connector.Command.DoReturn(bike, Arg.Any<LocationDto>());
				bikesViewModel.ActionText = "";
				viewService.DisplayAlert("Error returning bike!", "Returning bike outside of station is not possible. Distance to station 42 is 15986 m.", "OK");
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = "";
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state after action
			//Assert.AreEqual("Return bike", subsequent.ButtonText);
			//Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Open lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Return bike.
		/// Final state: Same as initial state.
		/// </summary>
		[Test]
		public void TestReturnReturnFailsNoGPSDataException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedClosed(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			bike.Id.Returns("0");

			viewService.DisplayAlert(string.Empty, "Return bike Nr. 0?", "Yes", "No").Returns(Task.FromResult(true));

			locks[0].GetDeviceState().Returns(DeviceState.Connected); // Simulate bike in reach. If bike is out of reach bluetooth state changes to unknown.

			NoGPSDataException.IsNoGPSData("Failure 2245: No GPS data, state change forbidden.", out NoGPSDataException noGPSDataException);

			connector.Command.DoReturn(bike, Arg.Any<LocationDto>()).Returns<BookingFinishedModel>(x =>
				throw noGPSDataException);

			bike.State.Value.Returns(InUseStateEnum.Booked); // Reqesthandler factory queries state to create appropriate request handler object.
			bike.LockInfo.State.Returns(LockingState.Closed); // Requsthandler factory queries lock state to create appropriate request handler object.

			var subsequent = handler.HandleRequestOption1().Result;

			locks.DidNotReceive().DisconnectAsync(Arg.Any<int>(), Arg.Any<Guid>());

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Returning bike...";
				connector.Command.DoReturn(bike, Arg.Any<LocationDto>());
				bikesViewModel.ActionText = "";
				viewService.DisplayAlert("Error returning bike!", "Returning bike at an unknown location is not possible.\r\nBike can be returned if\r\n- location information is available when closing lock\r\n- bike is in reach and location information is available when pressing button \"Return bike\"", "OK");
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = "";
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state after action
			//Assert.AreEqual("Return bike", subsequent.ButtonText);
			//Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Open lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Return bike.
		/// Final state: Same as initial state.
		/// </summary>
		[Test]
		public void TestReturnReturnFailsResponseException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedClosed(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			bike.Id.Returns("0");

			viewService.DisplayAlert(string.Empty, "Return bike Nr. 0?", "Yes", "No").Returns(Task.FromResult(true));

			locks[0].GetDeviceState().Returns(DeviceState.Connected); // Simulate bike in reach. If bike is out of reach bluetooth state changes to unknown.

			connector.Command.DoReturn(bike, Arg.Any<LocationDto>()).Returns<BookingFinishedModel>(x =>
				throw new ReturnBikeException(JsonConvert.DeserializeObject<DoReturnResponse>(@"{ ""response_text"" : ""Some invalid data received!""}"), "Outer message."));

			bike.State.Value.Returns(InUseStateEnum.Booked); // Reqesthandler factory queries state to create appropriate request handler object.
			bike.LockInfo.State.Returns(LockingState.Closed); // Requsthandler factory queries lock state to create appropriate request handler object.

			var subsequent = handler.HandleRequestOption1().Result;

			locks.DidNotReceive().DisconnectAsync(Arg.Any<int>(), Arg.Any<Guid>());

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Returning bike...";
				connector.Command.DoReturn(bike, Arg.Any<LocationDto>());
				bikesViewModel.ActionText = "";
				viewService.DisplayAdvancedAlert("Statusfehler beim Zurückgeben des Rads!", "Outer message.", "Some invalid data received!", "OK");
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = "";
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state after action
			//Assert.AreEqual("Return bike", subsequent.ButtonText);
			//Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Open lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Return bike.
		/// Final state: Same as initial state.
		/// </summary>
		[Test]
		public void TestReturnReturnFailsException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedClosed(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			bike.Id.Returns("0");

			viewService.DisplayAlert(string.Empty, "Return bike Nr. 0?", "Yes", "No").Returns(Task.FromResult(true));

			locks[0].GetDeviceState().Returns(DeviceState.Connected); // Simulate bike in reach. If bike is out of reach bluetooth state changes to unknown.

			connector.Command.DoReturn(bike, Arg.Any<LocationDto>()).Returns<BookingFinishedModel>(x => throw new Exception("Exception message."));

			bike.State.Value.Returns(InUseStateEnum.Booked); // Reqesthandler factory queries state to create appropriate request handler object.
			bike.LockInfo.State.Returns(LockingState.Closed); // Requsthandler factory queries lock state to create appropriate request handler object.

			var subsequent = handler.HandleRequestOption1().Result;

			locks.DidNotReceive().DisconnectAsync(Arg.Any<int>(), Arg.Any<Guid>());

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Returning bike...";
				connector.Command.DoReturn(bike, Arg.Any<LocationDto>());
				bikesViewModel.ActionText = "";
				viewService.DisplayAlert("Error returning bike!", "Exception message.", "OK");
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = "";
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state after action
			//Assert.AreEqual("Return bike", subsequent.ButtonText);
			//Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Open lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Open lock
		/// Final state: Booked opened.
		/// </summary>
		[Test]
		public void TestOpen()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedClosed(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].OpenAsync()
				.Returns(Task.FromResult((LockitLockingState?)LockitLockingState.Open)); // Return lock state indicating success

			bike.State.Value.Returns(InUseStateEnum.Booked);

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Opening lock...";
				locks.Received()[0].OpenAsync(); // Lock must be closed
				bikesViewModel.ActionText = "Reading charging level...";
				locks[0].GetBatteryPercentageAsync();
				bikesViewModel.ActionText = "Updating lock state...";
				connector.Command.UpdateLockingStateAsync(bike, null);
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = "";
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Open" after action
			Assert.AreEqual("Close lock & return bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Close lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Open lock
		/// Final state: Same as initial state.
		/// </summary>
		[Test]
		public void TestOpenOpenFailsOutOfReachException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedClosed(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].OpenAsync()
				.Returns<Task<LockitLockingState?>>(x => throw new OutOfReachException());

			bike.State.Value.Returns(InUseStateEnum.Booked);
			bike.LockInfo.State.Returns(LockingState.Closed);

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Opening lock...";
				locks.Received()[0].OpenAsync(); // Lock must be closed
				bikesViewModel.ActionText = "";
				viewService.DisplayAlert("Error while opening lock!", "Lock cannot be opened until bike is near.", "OK");
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = "";
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Disconnected" after action
			Assert.AreEqual(nameof(BookedDisconnected), subsequent.ButtonText);
			Assert.IsFalse(subsequent.IsButtonVisible);
			Assert.AreEqual("Search lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Open lock
		/// Final state: Same as initial state.
		/// </summary>
		[Test]
		public void TestOpenOpenFailsCouldntOpenBoldBlockedException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedClosed(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].OpenAsync()
				.Returns<Task<LockitLockingState?>>(x => throw new CouldntOpenBoldIsBlockedException());

			bike.State.Value.Returns(InUseStateEnum.Booked);
			bike.LockInfo.State.Returns(LockingState.Closed);

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Opening lock...";
				locks.Received()[0].OpenAsync(); // Lock must be closed
				bikesViewModel.ActionText = "";
				viewService.DisplayAlert("Error while opening lock!", "Lock is blocked. Please ensure that no obstacle prevents lock from opening and try again.", "OK");
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = "";
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Unknown" after action
			Assert.AreEqual("Open lock", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Close lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}


		/// <summary>
		/// Use case: Open lock
		/// Final state: Same as initial state.
		/// </summary>
		[Test]
		public void TestOpenOpenFailsCouldntOpenInconsistentStateExecptionClosed()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedClosed(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].OpenAsync()
				.Returns<Task<LockitLockingState?>>(x => throw new CouldntOpenInconsistentStateExecption(LockingState.Closed));

			bike.State.Value.Returns(InUseStateEnum.Booked);
			bike.LockInfo.State.Returns(LockingState.Closed);

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Opening lock...";
				locks.Received()[0].OpenAsync(); // Lock must be closed
				bikesViewModel.ActionText = "";
				viewService.DisplayAlert("Error while opening lock!", "After try to open lock state closed is reported.", "OK");
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = "";
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Closed" after action
			Assert.AreEqual("Return bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Open lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Open lock
		/// Final state: Same as initial state.
		/// </summary>
		[Test]
		public void TestOpenOpenFailsCouldntOpenInconsistentStateExecption()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedClosed(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].OpenAsync()
				.Returns<Task<LockitLockingState?>>(x => throw new CouldntOpenBoldWasBlockedException());

			bike.State.Value.Returns(InUseStateEnum.Booked);
			bike.LockInfo.State.Returns(LockingState.Closed);

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Opening lock...";
				locks.Received()[0].OpenAsync(); // Lock must be closed
				bikesViewModel.ActionText = "";
				viewService.DisplayAlert("Lock can not be opened!", "Lock was blocked and might still be. Please ensure that no obstacle prevents lock from opening and try again.", "OK");
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = "";
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Disconnected" after action
			Assert.AreEqual("Open lock", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Close lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Open lock
		/// Final state: Same as initial state.
		/// </summary>
		[Test]
		public void TestOpenOpenFailsException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedClosed(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].OpenAsync()
				.Returns<Task<LockitLockingState?>>(x => throw new Exception("Exception message."));

			bike.State.Value.Returns(InUseStateEnum.Booked);
			bike.LockInfo.State.Returns(LockingState.Closed);

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Opening lock...";
				locks.Received()[0].OpenAsync(); // Lock must be closed
				bikesViewModel.ActionText = "";
				viewService.DisplayAlert("Error while opening lock!", "Exception message.", "OK");
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = "";
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Disconnected" after action
			Assert.AreEqual(nameof(BookedDisconnected), subsequent.ButtonText);
			Assert.IsFalse(subsequent.IsButtonVisible);
			Assert.AreEqual("Search lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Open lock
		/// Final state: Booked opened.
		/// </summary>
		[Test]
		public void TestOpenGetBatteryPercentageAsyncThrowsOutOfReachException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedClosed(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].OpenAsync()
				.Returns(Task.FromResult((LockitLockingState?)LockitLockingState.Open)); // Return lock state indicating success

			locks[0].GetBatteryPercentageAsync().Returns<Task<double>>(x => throw new OutOfReachException());

			bike.State.Value.Returns(InUseStateEnum.Booked);

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Opening lock...";
				locks.Received()[0].OpenAsync(); // Lock must be closed
				bikesViewModel.ActionText = "Reading charging level...";
				locks[0].GetBatteryPercentageAsync();
				bikesViewModel.ActionText = "Battery status can only be read when bike is nearby.";
				bikesViewModel.ActionText = "Updating lock state...";
				connector.Command.UpdateLockingStateAsync(bike, null);
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = "";
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Open" after action
			Assert.AreEqual("Close lock & return bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Close lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Open lock
		/// Final state: Booked opened.
		/// </summary>
		[Test]
		public void TestOpenGetBatteryPercentageAsyncThrowsExcepton()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedClosed(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].OpenAsync()
				.Returns(Task.FromResult((LockitLockingState?)LockitLockingState.Open)); // Return lock state indicating success

			locks[0].GetBatteryPercentageAsync().Returns<Task<double>>(x => throw new Exception());

			bike.State.Value.Returns(InUseStateEnum.Booked);

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Opening lock...";
				locks.Received()[0].OpenAsync(); // Lock must be closed
				bikesViewModel.ActionText = "Reading charging level...";
				locks[0].GetBatteryPercentageAsync();
				bikesViewModel.ActionText = "Battery status cannot be read.";
				bikesViewModel.ActionText = "Updating lock state...";
				connector.Command.UpdateLockingStateAsync(bike, null);
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = "";
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Closed" after action
			Assert.AreEqual("Close lock & return bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Close lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Open lock
		/// Final state: Booked open.
		/// </summary>
		[Test]
		public void TestOpenUpdateLockingStateFailsWebConnectFailureException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedClosed(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].OpenAsync()
				.Returns(LockitLockingState.Open);

			connector.Command.UpdateLockingStateAsync(bike, null).Returns(x => throw new WebConnectFailureException("Context info", new System.Exception("hoppla")));

			bike.State.Value.Returns(InUseStateEnum.Booked);
			bike.LockInfo.State.Returns(LockingState.Open);

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Opening lock...";
				locks.Received()[0].OpenAsync(); // Lock must be closed
				bikesViewModel.ActionText = "Reading charging level...";
				locks[0].GetBatteryPercentageAsync();
				bikesViewModel.ActionText = "Updating lock state...";
				connector.Command.UpdateLockingStateAsync(bike, null);
				bikesViewModel.ActionText = "No web error on updating locking status.";
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = "";
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Open" after action
			Assert.AreEqual("Close lock & return bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Close lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Open lock
		/// Final state: Booked open.
		/// </summary>
		[Test]
		public void TestOpenUpdateLockingStateFailsException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedClosed(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].OpenAsync()
				.Returns(LockitLockingState.Open);

			connector.Command.UpdateLockingStateAsync(bike, Arg.Any<LocationDto>()).Returns(x => throw new Exception("Exception message."));

			bike.State.Value.Returns(InUseStateEnum.Booked);
			bike.LockInfo.State.Returns(LockingState.Open);

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Opening lock...";
				locks.Received()[0].OpenAsync(); // Lock must be closed
				bikesViewModel.ActionText = "Reading charging level...";
				locks[0].GetBatteryPercentageAsync();
				bikesViewModel.ActionText = "Updating lock state...";
				connector.Command.UpdateLockingStateAsync(bike, Arg.Any<LocationDto>());
				bikesViewModel.ActionText = "Connection error on updating locking status.";
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = "";
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Open" after action
			Assert.AreEqual("Close lock & return bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Close lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}

		/// <summary>
		/// Use case: Open lock
		/// Final state: Booked open.
		/// </summary>
		[Test]
		public void TestOpenUpdateLockingStateFailsResponseException()
		{
			var bike = Substitute.For<IBikeInfoMutable>();
			var connector = Substitute.For<IConnector>();
			var command = Substitute.For<ICommand>();
			var geolocation = Substitute.For<IGeolocation>();
			var locks = Substitute.For<ILocksService>();
			var pollingManager = Substitute.For<IPollingUpdateTaskManager>();
			var viewService = Substitute.For<IViewService>();
			var bikesViewModel = Substitute.For<IBikesViewModel>();
			var activeUser = Substitute.For<IUser>();

			var handler = new BookedClosed(
				bike,
				() => true, // isConnectedDelegate
				(isConnexted) => connector,
				geolocation,
				locks,
				() => pollingManager,
				Substitute.For<ISmartDevice>(),
				viewService,
				bikesViewModel,
				activeUser);

			locks[0].OpenAsync()
				.Returns(LockitLockingState.Open);

			connector.Command.UpdateLockingStateAsync(bike, Arg.Any<LocationDto>()).Returns(x =>
				throw new ReturnBikeException(JsonConvert.DeserializeObject<DoReturnResponse>(@"{ ""response_text"" : ""Some invalid data received!""}"), "Outer message."));

			bike.State.Value.Returns(InUseStateEnum.Booked);
			bike.LockInfo.State.Returns(LockingState.Open);

			var subsequent = handler.HandleRequestOption2().Result;

			// Verify behaviour
			Received.InOrder(() =>
			{
				bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
				bikesViewModel.ActionText = "One moment please...";
				pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
				bikesViewModel.ActionText = "Opening lock...";
				locks.Received()[0].OpenAsync(); // Lock must be closed
				bikesViewModel.ActionText = "Reading charging level...";
				locks[0].GetBatteryPercentageAsync();
				bikesViewModel.ActionText = "Updating lock state...";
				connector.Command.UpdateLockingStateAsync(bike, Arg.Any<LocationDto>());
				bikesViewModel.ActionText = "Status error on updating lock state.";
				bikesViewModel.ActionText = "Updating...";
				pollingManager.StartUpdateAyncPeridically(); // polling must be restarted again
				bikesViewModel.ActionText = "";
				bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
			});

			// Verify state "Booked Open" after action
			Assert.AreEqual("Close lock & return bike", subsequent.ButtonText);
			Assert.IsTrue(subsequent.IsButtonVisible);
			Assert.AreEqual("Close lock", subsequent.LockitButtonText);
			Assert.IsTrue(subsequent.IsLockitButtonVisible);
		}
	}
}