sharee.bike-App/TestShareeLib/ViewModel/Bikes/Bike/BluetoothLock/RequestHandler/TestBookedOpen.cs

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

namespace TestTINKLib.Fixtures.ObjectTests.ViewModel.Bikes.Bike.BluetoothLock.RequestHandler
{
    [TestFixture]
    public class TestBookedOpen
    {
        /// <summary>
        /// Test construction of object.
        /// </summary>
        [Test]
        public void Testctor()
        {
            var handler = new BookedOpen(
                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("Close lock & return bike", handler.ButtonText);
            Assert.IsTrue(handler.IsButtonVisible);
            Assert.AreEqual("Close lock", handler.LockitButtonText);
            Assert.IsTrue(handler.IsLockitButtonVisible);
        }

        /// <summary>
        /// Use case: Close lock and return. 
        /// Comment: User cancels operation.
        /// Final state: Booked and open.
        /// Similar to TestReservedClosed::TestBookAndOpenCancelBook
        /// </summary>
        [Test]
        public void TestCloseAndReturnCancelReturn()
        {
            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 BookedOpen(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                Substitute.For<ISmartDevice>(),
                viewService,
                bikesViewModel,
                activeUser);

            viewService.DisplayAlert(string.Empty, "Close lock and return bike Nr. 0 Allround Mono?", "Yes", "No").Returns(Task.FromResult(false));

            var subsequent = handler.HandleRequestOption1().Result;

            // Verify behaviour
            Received.InOrder(() =>
            {
                bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
                bikesViewModel.Received(1).IsIdle = true; // GUI must be unlocked
            });

            // Verify state 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: Close lock and return.
        /// Final state: Disposable closed.
        /// Similar to TestReservedClosed::TestBookAndOpen
        /// </summary>
        [Test]
        public void TestCloseAndReturn()
        {
            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 BookedOpen(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                Substitute.For<ISmartDevice>(),
                viewService,
                bikesViewModel,
                activeUser);

            bike.Id.Returns("0");

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

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

            geolocation.GetAsync(Arg.Any<CancellationToken?>(), Arg.Any<DateTime>()).Returns(Task.FromResult(new Location(1, 2)));

            bike.State.Value.Returns(InUseStateEnum.Disposable); // Return call leads to setting of state to disposable.

            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>()); // Geolocation must be retrieved
                bikesViewModel.ActionText = "One moment please...";
                pollingManager.StopUpdatePeridically(); // Polling must be stopped before any COPR and lock service action
                bikesViewModel.ActionText = "Starting bike return...";
                connector.Command.StartReturningBike(bike); // Notify about start
                bikesViewModel.ActionText = "Closing lock...";
                locks.Received()[0].CloseAsync(); // Lock must be closed
                bikesViewModel.ActionText = "Query location...";
                bikesViewModel.ActionText = "Returning bike...";
                connector.Command.DoReturn(bike, Arg.Is<LocationDto>(x => x.Latitude == 1 && x.Longitude ==2), Arg.Any<ISmartDevice>()); // Booking must be performed
                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 "Disposable Closed" after action
            Assert.AreEqual("Reserve bike", subsequent.ButtonText);
            Assert.IsTrue(subsequent.IsButtonVisible);
            Assert.AreEqual("DisposableDisconnected", subsequent.LockitButtonText);
            Assert.IsFalse(subsequent.IsLockitButtonVisible);
        }

        /// <summary>
        /// Use case: Close lock and return.
        /// Final state: Same as initial state.
        /// </summary>
        [Test]
        public void TestCloseAndReturnCloseFailsOutOfReachException()
        {
            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 BookedOpen(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                Substitute.For<ISmartDevice>(),
                viewService,
                bikesViewModel,
                activeUser);

            bike.Id.Returns("0");

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

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

            bike.State.Value.Returns(InUseStateEnum.Booked); // Booking state remains unchanged if closing fails.

            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 = "Start query location...";
                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 = "Starting bike return...";
                connector.Command.StartReturningBike(bike); // Notify about start
                bikesViewModel.ActionText = "Closing lock...";
                locks.Received()[0].CloseAsync(); // Lock must be closed
                bikesViewModel.ActionText = "";
                bike.LockInfo.State = LockingState.UnknownDisconnected;
                connector.Command.UpdateLockingStateAsync(Arg.Any<IBikeInfoMutable>());
                viewService.DisplayAlert("Lock can not be closed!", "Lock cannot be closed 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("BookedDisconnected", subsequent.ButtonText);
            Assert.IsFalse(subsequent.IsButtonVisible);
            Assert.AreEqual("Search lock", subsequent.LockitButtonText);
            Assert.IsTrue(subsequent.IsLockitButtonVisible);
        }

        [Test]
        public void TestCloseAndReturnStartReturningBikeWebConnectFailureException()
        {
            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 BookedOpen(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                Substitute.For<ISmartDevice>(),
                viewService,
                bikesViewModel,
                activeUser);

            bike.Id.Returns("0");

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

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

            bike.LockInfo.State.Returns(LockingState.Open);     // If locking fails bike remains open.
            bike.State.Value.Returns(InUseStateEnum.Booked);    // Booking state remains unchanged if closing fails.

            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 = "Start query location...";
                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 = "Starting bike return...";
                connector.Command.StartReturningBike(bike); // Notify about start
                bikesViewModel.ActionText = "";
                viewService.DisplayAdvancedAlert(
                    "Connection error when returning the bike!",
                    "Internet must be available when returning the bike.\r\nIs WIFI available/ mobile networt 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 "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);
        }

        [Test]
        public void TestCloseAndReturnStartReturningBikeException()
        {
            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 BookedOpen(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                Substitute.For<ISmartDevice>(),
                viewService,
                bikesViewModel,
                activeUser);

            bike.Id.Returns("0");

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

            connector.Command.StartReturningBike(bike).Returns(x => throw new Exception("Context info", new Exception("hoppla")));

            bike.LockInfo.State.Returns(LockingState.Open);     // If locking fails bike remains open.
            bike.State.Value.Returns(InUseStateEnum.Booked);    // Booking state remains unchanged if closing fails.

            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 = "Start query location...";
                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 = "Starting bike return...";
                connector.Command.StartReturningBike(bike); // Notify about start
                bikesViewModel.ActionText = "";
                viewService.DisplayAlert(
                    "Error returning bike!",
                    "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 "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: Close lock and return.
        /// Final state: Same as initial state.
        /// </summary>
        [Test]
        public void TestCloseAndReturnCloseFailsException()
        {
            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 BookedOpen(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                Substitute.For<ISmartDevice>(),
                viewService,
                bikesViewModel,
                activeUser);

            bike.Id.Returns("0");

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

            locks[0].CloseAsync()
                .Returns<LockitLockingState?>(x => throw new Exception("Blu"));

            bike.LockInfo.State.Returns(LockingState.Open); // If locking fails bike remains open.
            bike.State.Value.Returns(InUseStateEnum.Booked); // Booking state remains unchanged if closing fails.

            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 = "Start query location...";
                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 = "Starting bike return...";
                connector.Command.StartReturningBike(bike); // Notify about start
                bikesViewModel.ActionText = "Closing lock...";
                locks.Received()[0].CloseAsync(); // Lock must be closed
                bikesViewModel.ActionText = "";
                bike.LockInfo.State = LockingState.UnknownDisconnected;
                connector.Command.UpdateLockingStateAsync(Arg.Any<IBikeInfoMutable>());
                viewService.DisplayAlert("Lock can not be closed!", "Blu", "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 open" after action
            Assert.AreEqual("BookedDisconnected", subsequent.ButtonText);
            Assert.IsFalse(subsequent.IsButtonVisible);
            Assert.AreEqual("Search lock", subsequent.LockitButtonText);
            Assert.IsTrue(subsequent.IsLockitButtonVisible);
        }

        /// <summary>
        /// Use case: Close lock and return.
        /// Final state: Same as initial state.
        /// </summary>
        [Test]
        public void TestCloseAndReturnCloseFailsCouldntCloseMovingException()
        {
            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 BookedOpen(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                Substitute.For<ISmartDevice>(),
                viewService,
                bikesViewModel,
                activeUser);

            bike.Id.Returns("0");

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

            locks[0].CloseAsync()
                .Returns<LockitLockingState?>(x => throw new CouldntCloseMovingException()); 

            //bike.LockInfo.State.Returns(LockingState.Open); // If locking fails bike remains open.
            bike.State.Value.Returns(InUseStateEnum.Booked); // Booking state remains unchanged if closing fails.

            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 = "Start query location...";
                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 = "Starting bike return...";
                connector.Command.StartReturningBike(bike); // Notify about start
                bikesViewModel.ActionText = "Closing lock...";
                locks.Received()[0].CloseAsync(); // Lock must be closed
                bikesViewModel.ActionText = "";
                bike.LockInfo.State = LockingState.Open;
                connector.Command.UpdateLockingStateAsync(Arg.Any<IBikeInfoMutable>());
                viewService.DisplayAlert(
                    "Lock can not be closed!",
                    "Lock can only be closed if bike is not moving. Please park bike 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 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: Close lock and return.
        /// Final state: Same as initial state.
        /// </summary>
        [Test]
        public void TestCloseAndReturnCloseFailsNotClosed()
        {
            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 BookedOpen(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                Substitute.For<ISmartDevice>(),
                viewService,
                bikesViewModel,
                activeUser);

            bike.Id.Returns("0");

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

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

            bike.State.Value.Returns(InUseStateEnum.Booked); // Booking state remains unchanged if closing fails.

            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 = "Start query location...";
                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 = "Starting bike return...";
                connector.Command.StartReturningBike(bike); // Notify about start
                bikesViewModel.ActionText = "Closing lock...";
                locks.Received()[0].CloseAsync(); // Lock must be closed
                bike.LockInfo.State = LockingState.Open;
                bikesViewModel.ActionText = "";
                connector.Command.UpdateLockingStateAsync(Arg.Any<IBikeInfoMutable>());
                viewService.DisplayAlert("Lock can not be closed!", "After try to close lock state open 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 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: Close lock and return.
        /// Final state: Booked locked.
        /// </summary>
        [Test]
        public async Task TestCloseAndReturnGetGeolocationFailsException()
        {
            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 BookedOpen(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                Substitute.For<ISmartDevice>(),
                viewService,
                bikesViewModel,
                activeUser);

            bike.Id.Returns("0");

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

            locks[0].CloseAsync()
                .Returns(LockitLockingState.Closed);

            geolocation.GetAsync(Arg.Any<CancellationToken?>(), Arg.Any<DateTime>()).Returns(Task.FromException<Location>(new Exception("noloc")));

            bike.State.Value.Returns(InUseStateEnum.Booked); // Booking state remains unchanged if closing fails.

            var subsequent = await handler.HandleRequestOption1();

            await 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 = "Starting bike return...";
                connector.Command.StartReturningBike(bike); // Notify about start
                bikesViewModel.ActionText = "Closing lock...";
                locks.Received()[0].CloseAsync(); // Lock must be closed
                bikesViewModel.ActionText = "Query location...";
                bikesViewModel.ActionText = "";
                viewService.DisplayAdvancedAlert("Error Query Location!", "Closing the lock and ending the rental is not possible.", "noloc", "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 & continue renting", subsequent.LockitButtonText);
            Assert.IsTrue(subsequent.IsLockitButtonVisible);
        }

        /// <summary>
        /// Use case: Close lock and return.
        /// Final state: Booked locked.
        /// </summary>
        [Test]
        public void TestCloseAndReturnReturnFailsWebConnectFailureException()
        {
            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 BookedOpen(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                Substitute.For<ISmartDevice>(),
                viewService,
                bikesViewModel,
                activeUser);

            bike.Id.Returns("0");

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

            locks[0].CloseAsync()
                .Returns(LockitLockingState.Closed);

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

            bike.State.Value.Returns(InUseStateEnum.Booked); // Booking state remains unchanged if closing fails.

            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 = "Start query location...";
                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 = "Starting bike return...";
                connector.Command.StartReturningBike(bike); // Notify about start
                bikesViewModel.ActionText = "Closing lock...";
                locks.Received()[0].CloseAsync(); // Lock must be closed
                bikesViewModel.ActionText = "Query location...";
                bikesViewModel.ActionText = "Returning bike...";
                bikesViewModel.ActionText = "";
                viewService.DisplayAdvancedAlert(
                    "Connection error when returning the bike!",
                    "Internet must be available when returning the bike.\r\nIs WIFI available/ mobile networt 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 "Booked closed" after action
            Assert.AreEqual("Return bike", subsequent.ButtonText);
            Assert.IsTrue(subsequent.IsButtonVisible);
            Assert.AreEqual("Open lock & continue renting", subsequent.LockitButtonText);
            Assert.IsTrue(subsequent.IsLockitButtonVisible);
        }

        /// <summary>
        /// Use case: Close lock and return.
        /// Final state: Booked locked.
        /// </summary>
        [Test]
        public void TestCloseAndReturnReturnFailsException()
        {
            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 BookedOpen(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                Substitute.For<ISmartDevice>(),
                viewService,
                bikesViewModel,
                activeUser);

            bike.Id.Returns("0");

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

            locks[0].CloseAsync()
                .Returns(LockitLockingState.Closed);

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

            bike.State.Value.Returns(InUseStateEnum.Booked); // Booking state remains unchanged if closing fails.

            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 = "Start query location...";
                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 = "Starting bike return...";
                connector.Command.StartReturningBike(bike); // Notify about start
                bikesViewModel.ActionText = "Closing lock...";
                locks.Received()[0].CloseAsync(); // Lock must be closed
                bikesViewModel.ActionText = "Query location...";
                bikesViewModel.ActionText = "Returning bike...";
                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 "Booked closed" after action
            Assert.AreEqual("Return bike", subsequent.ButtonText);
            Assert.IsTrue(subsequent.IsButtonVisible);
            Assert.AreEqual("Open lock & continue renting", subsequent.LockitButtonText);
            Assert.IsTrue(subsequent.IsLockitButtonVisible);
        }

        /// <summary>
        /// Use case: Close lock and return.
        /// Final state: Booked locked.
        /// </summary>
        [Test]
        public void TestCloseAndReturnReturnFailsNotAtStationException()
        {
            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 BookedOpen(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                Substitute.For<ISmartDevice>(),
                viewService,
                bikesViewModel,
                activeUser);

            bike.Id.Returns("0");

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

            locks[0].CloseAsync()
                .Returns(LockitLockingState.Closed);

            NotAtStationException.IsNotAtStation("Failure 2178: bike 1545 out of GEO fencing. 15986 meter distance to next station 77. OK: bike 1545 locked confirmed", out NotAtStationException notAtStationException);

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

            bike.State.Value.Returns(InUseStateEnum.Booked); // Booking state remains unchanged if closing fails.

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

            var subsequent = handler.HandleRequestOption1().Result;

            // Verify behaviour
            Received.InOrder(() =>
            {
                bikesViewModel.Received(1).IsIdle = false; // GUI must be locked
                bikesViewModel.ActionText = "Start query location...";
                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 = "Starting bike return...";
                connector.Command.StartReturningBike(bike); // Notify about start
                bikesViewModel.ActionText = "Closing lock...";
                locks.Received()[0].CloseAsync(); // Lock must be closed
                bikesViewModel.ActionText = "Query location...";
                bikesViewModel.ActionText = "Returning bike...";
                bikesViewModel.ActionText = "";
                viewService.DisplayAlert("Error returning bike!", "Returning bike outside of station is not possible. Distance to station 77 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 "Booked closed" after action
            Assert.AreEqual("Return bike", subsequent.ButtonText);
            Assert.IsTrue(subsequent.IsButtonVisible);
            Assert.AreEqual("Open lock & continue renting", subsequent.LockitButtonText);
            Assert.IsTrue(subsequent.IsLockitButtonVisible);
        }

        /// <summary>
        /// Use case: Close lock and return.
        /// Final state: Booked locked.
        /// </summary>
        [Test]
        public void TestCloseAndReturnReturnFailsNoGPSDataException()
        {
            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 BookedOpen(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                Substitute.For<ISmartDevice>(),
                viewService,
                bikesViewModel,
                activeUser);

            bike.Id.Returns("0");

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

            locks[0].CloseAsync()
                .Returns(LockitLockingState.Closed);

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

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

            bike.State.Value.Returns(InUseStateEnum.Booked); // Booking state remains unchanged if closing fails.

            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 = "Start query location...";
                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 = "Starting bike return...";
                connector.Command.StartReturningBike(bike); // Notify about start
                bikesViewModel.ActionText = "Closing lock...";
                locks.Received()[0].CloseAsync(); // Lock must be closed
                bikesViewModel.ActionText = "Query location...";
                bikesViewModel.ActionText = "Returning bike...";
                bikesViewModel.ActionText = "";
                viewService.DisplayAlert("Error returning bike!", "Returning bike at an unknown location is not possible.\r\nBike can only be returned if  bike is in reach and location information is available.", "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 & continue renting", subsequent.LockitButtonText);
            Assert.IsTrue(subsequent.IsLockitButtonVisible);
        }

        /// <summary>
        /// Use case: Close lock and return.
        /// Final state: Booked locked.
        /// </summary>
        [Test]
        public void TestCloseAndReturnReturnFailsResponseException()
        {
            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 BookedOpen(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                Substitute.For<ISmartDevice>(),
                viewService,
                bikesViewModel,
                activeUser);

            bike.Id.Returns("0");

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

            locks[0].CloseAsync()
                .Returns(LockitLockingState.Closed);

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

            bike.State.Value.Returns(InUseStateEnum.Booked); // Booking state remains unchanged if closing fails.

            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 = "Start query location...";
                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 = "Starting bike return...";
                connector.Command.StartReturningBike(bike); // Notify about start
                bikesViewModel.ActionText = "Closing lock...";
                locks.Received()[0].CloseAsync(); // Lock must be closed
                bikesViewModel.ActionText = "Query location...";
                bikesViewModel.ActionText = "Returning bike...";
                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 "Booked closed" after action
            Assert.AreEqual("Return bike", subsequent.ButtonText);
            Assert.IsTrue(subsequent.IsButtonVisible);
            Assert.AreEqual("Open lock & continue renting", subsequent.LockitButtonText);
            Assert.IsTrue(subsequent.IsLockitButtonVisible);
        }

        /// <summary>
        /// Use case: Close lock
        /// Final state: Booked closed.
        /// </summary>
        [Test]
        public void TestClose()
        {
            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 BookedOpen(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                Substitute.For<ISmartDevice>(),
                viewService,
                bikesViewModel,
                activeUser);

            locks[0].CloseAsync()
                .Returns(Task.FromResult((LockitLockingState?)LockitLockingState.Closed)); // 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 = "Closing lock...";
                locks.Received()[0].CloseAsync(); // Lock must be closed
                bikesViewModel.ActionText = "Updating lock state...";
                connector.Command.UpdateLockingStateAsync(bike, Arg.Any<LocationDto>());
                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 & continue renting", subsequent.LockitButtonText);
            Assert.IsTrue(subsequent.IsLockitButtonVisible);
        }

        /// <summary>
        /// Use case: Close lock
        /// Final state: Same as initial state.
        /// </summary>
        [Test]
        public void TestCloseCloseFailsOutOfReachException()
        {
            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 BookedOpen(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                Substitute.For<ISmartDevice>(),
                viewService,
                bikesViewModel,
                activeUser);

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

            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 = "Closing lock...";
                locks.Received()[0].CloseAsync(); // Lock must be closed
                bikesViewModel.ActionText = "";
                viewService.DisplayAlert("Lock can not be closed!", "Lock cannot be closed 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("BookedDisconnected", subsequent.ButtonText);
            Assert.IsFalse(subsequent.IsButtonVisible);
            Assert.AreEqual("Search lock", subsequent.LockitButtonText);
            Assert.IsTrue(subsequent.IsLockitButtonVisible);
        }

        /// <summary>
        /// Use case: Close lock
        /// Final state: Same as initial state.
        /// </summary>
        [Test]
        public void TestCloseCloseFailsException()
        {
            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 BookedOpen(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                Substitute.For<ISmartDevice>(),
                viewService,
                bikesViewModel,
                activeUser);

            locks[0].CloseAsync()
                .Returns<Task< LockitLockingState?>>(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 = "Closing lock...";
                locks.Received()[0].CloseAsync(); // Lock must be closed
                bikesViewModel.ActionText = "";
                viewService.DisplayAlert("Lock can not be closed!", "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("BookedDisconnected", subsequent.ButtonText);
            Assert.IsFalse(subsequent.IsButtonVisible);
            Assert.AreEqual("Search lock", subsequent.LockitButtonText);
            Assert.IsTrue(subsequent.IsLockitButtonVisible);
        }

        /// <summary>
        /// Use case: Close lock
        /// Final state: Booked closed.
        /// </summary>
        [Test]
        public void TestCloseUpdateLockingStateFailsWebConnectFailureException()
        {
            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 BookedOpen(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                Substitute.For<ISmartDevice>(),
                viewService,
                bikesViewModel,
                activeUser);

            locks[0].CloseAsync()
                .Returns(LockitLockingState.Closed); // Return lock state indicating success

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

            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 = "Closing lock...";
                locks.Received()[0].CloseAsync(); // Lock must be closed
                bikesViewModel.ActionText = "Updating lock state...";
                connector.Command.UpdateLockingStateAsync(bike, Arg.Any<LocationDto>());
                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 Closed" after action
            Assert.AreEqual("Return bike", subsequent.ButtonText);
            Assert.IsTrue(subsequent.IsButtonVisible);
            Assert.AreEqual("Open lock & continue renting", subsequent.LockitButtonText);
            Assert.IsTrue(subsequent.IsLockitButtonVisible);
        }

        /// <summary>
        /// Use case: close lock
        /// Final state: Booked closed.
        /// </summary>
        [Test]
        public void TestCloseUpdateLockingStateFailsException()
        {
            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 BookedOpen(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                Substitute.For<ISmartDevice>(),
                viewService,
                bikesViewModel,
                activeUser);

            locks[0].CloseAsync()
                .Returns(LockitLockingState.Closed); // Return lock state indicating success

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

            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 = "Closing lock...";
                locks.Received()[0].CloseAsync(); // Lock must be closed
                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 Closed" after action
            Assert.AreEqual("Return bike", subsequent.ButtonText);
            Assert.IsTrue(subsequent.IsButtonVisible);
            Assert.AreEqual("Open lock & continue renting", subsequent.LockitButtonText);
            Assert.IsTrue(subsequent.IsLockitButtonVisible);
        }

        /// <summary>
        /// Use case: close lock
        /// Final state: Booked closed.
        /// </summary>
        [Test]
        public void TestCloseUpdateLockingStateFailsResponseException()
        {
            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 BookedOpen(
                bike,
                () => true, // isConnectedDelegate
                (isConnexted) => connector,
                geolocation,
                locks,
                () => pollingManager,
                Substitute.For<ISmartDevice>(),
                viewService,
                bikesViewModel,
                activeUser);

            locks[0].CloseAsync()
                .Returns(LockitLockingState.Closed); // Return lock state indicating success

            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);

            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 = "Closing lock...";
                locks.Received()[0].CloseAsync(); // Lock must be closed
                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 Closed" after action
            Assert.AreEqual("Return bike", subsequent.ButtonText);
            Assert.IsTrue(subsequent.IsButtonVisible);
            Assert.AreEqual("Open lock & continue renting", subsequent.LockitButtonText);
            Assert.IsTrue(subsequent.IsLockitButtonVisible);
        }
    }
}