sharee.bike-App/TestTINKLib/Fixtures/ObjectTests/ViewModel/Map/TestMapPageViewModel.cs

using NUnit.Framework;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using TINK.Model;
using TINK.Model.Connector;
using TINK.Repository.Exception;
using TINK.Model.Services.CopriApi;
using TINK.View;
using TINK.ViewModel.Map;
using Xamarin.Forms;
using TINK.ViewModel.Settings;
using TINK.Model.Services.Geolocation;
using TINK.Services;
using NSubstitute;
using TINK.Services.Permissions;
using TestFramework.Services.BluetoothLock;
using TestFramework.Model.Services.Geolocation;
using TestFramework.Model.User.Account;
using TestFramework.Model.Device;
using TestFramework.Services.Permissions;
using TestFramework.Repository;
using TestFramework.Services.CopriApi.Connector;
using TINK.Repository;

namespace TestShareeLib.UseCases.Startup
{

    [TestFixture]
    public class TestMapPageViewModel
    {
        [Test]
        public async Task TestConstruct()
        {
            var tinkApp = new TinkApp(
                new TINK.Model.Settings.Settings(
                    new GroupFilterMapPage(new Dictionary<string, FilterState> { { FilterHelper.CARGOBIKE, FilterState.On }, { FilterHelper.CITYBIKE, FilterState.Off } }),
                    new GroupFilterSettings(new Dictionary<string, FilterState> { { FilterHelper.CARGOBIKE, FilterState.On }, { FilterHelper.CITYBIKE, FilterState.On } }),
                    new Uri("https://tinkwwp.copri-bike.de/APIjsonserver"),
                    new TINK.Settings.PollingParameters(new TimeSpan(10000), true),
                    Serilog.Events.LogEventLevel.Error,
                    activeLockService: typeof(LocksServiceMock).FullName,
                    activeGeolocationService: typeof(GeolocationMock).FullName),
                new StoreMock(),
                (isConnected, uri, sessionCookie, mail, expiresAfter) => new ConnectorCache(new AppContextInfo("MyMerchId", "MyApp", new Version(1, 2)), sessionCookie, mail, new CopriCallsMemory001(sessionCookie)),
                "MyMerchId",
                Substitute.For<IServicesContainer<IGeolocation>>(),
                new LocksServiceMock(),
                new DeviceMock(),
                new SpecialFolderMock(),
                null, // Cipher
                new PermissionsMock(),
                isConnectedFunc: () => true,
                postAction: (d, obj) => d(obj),
                currentVersion: new Version(3, 2, 0, 115), // Current app version
                lastVersion: new Version(3, 0, 173), // Current app version. Must be larger or equal 3.0.173 to 
                whatsNewShownInVersion: null); // Whats new page was never shown.

            var viewService = Substitute.For<IViewService>();
            var navigationService = Substitute.For<INavigation>();
            var locationPermission = Substitute.For<ILocationPermission>();

            locationPermission.CheckStatusAsync().Returns(Status.Granted);

            var viewModel = new MapPageViewModel(
                tinkApp,
                locationPermission,
                Substitute.For<Plugin.BLE.Abstractions.Contracts.IBluetoothLE>(),
                Substitute.For<IGeolocation>(),
                (mapspan) => { },
                viewService,
                navigationService);

            try
            {
                await viewModel.OnAppearing(); // Is called when page shows.

                Assert.IsNull(viewModel.Exception);

                // Verify pins on map
                Assert.AreEqual(27, viewModel.Pins.Count); // Were 8 pins when loading from CopriCallsMemory(SampleSets.Set2, 1, sessionCookie)
                Assert.That(
                    viewModel.Pins.FirstOrDefault(pin => pin.Icon.Id.Contains("Open_Green")).Tag,
                    Is.EqualTo("FR101"),
                    "Station FR105 must be marked green because there is are bike.");
                Assert.That(
                    viewModel.Pins.FirstOrDefault(pin => pin.Icon.Id.Contains("Open_Red")).Tag,
                    Is.EqualTo("KN12"),
                    "Station KN12 must be marked red because there is no bike."); // Was station id 31

                // Verify buttons
                Assert.IsTrue(viewModel.IsToggleVisible, "TINK and Konrad are activated in settings.");
                Assert.AreEqual(Color.Blue, viewModel.TinkColor, "TINK bikes are shown.");

                Assert.AreEqual(Color.Gray, viewModel.KonradColor, "Konrad bikes are hidden.");

                var statusInfoText = viewModel.StatusInfoText;
                Assert.That(
                    statusInfoText,
                    Does.Contain("Updating...").Or.Contain(""),
                    $"Unexpected text {statusInfoText} detected.",
                    "Text might be \"Updating...\" or empty depending on acivity of update thread.");
            }
            finally
            {
                await viewModel.OnDisappearing();
            }
        }

        [Test]
        public async Task TestConstruct_KonradActive()
        {
            var tinkApp = new TinkApp(
                new TINK.Model.Settings.Settings(
                    new GroupFilterMapPage(new Dictionary<string, FilterState> { { FilterHelper.CARGOBIKE, FilterState.Off }, { FilterHelper.CITYBIKE, FilterState.On } }),
                    new GroupFilterSettings(new Dictionary<string, FilterState> { { FilterHelper.CARGOBIKE, FilterState.On }, { FilterHelper.CITYBIKE, FilterState.On } }),
                    new Uri("https://tinkwwp.copri-bike.de/APIjsonserver"),
                    new TINK.Settings.PollingParameters(new TimeSpan(10000), true),
                    Serilog.Events.LogEventLevel.Error,
                    activeLockService: typeof(LocksServiceMock).FullName,
                    activeGeolocationService: typeof(GeolocationMock).FullName),
                new StoreMock(),
                (isConnected, uri, sessionCookie, mail, expiresAfter) => new ConnectorCache(new AppContextInfo("MyMerchId", "MyApp", new Version(1, 2)), sessionCookie, mail, new CopriCallsMemory001(sessionCookie)),
                "MyMerchId",
                Substitute.For<IServicesContainer<IGeolocation>>(),
                new LocksServiceMock(),
                new DeviceMock(),
                new SpecialFolderMock(),
                null, // Cipher
                new PermissionsMock(),
                isConnectedFunc: () => true,
                postAction: (d, obj) => d(obj),
                currentVersion: new Version(3, 2, 0, 115), // Current app version
                lastVersion: new Version(3, 0, 173), // Current app version. Must be larger or equal 3.0.173 to 
                whatsNewShownInVersion: null); // Whats new page was never shown.

            var viewService = Substitute.For<IViewService>();
            var navigationService = Substitute.For<INavigation>();
            var locationPermission = Substitute.For<ILocationPermission>();

            locationPermission.CheckStatusAsync().Returns(Status.Granted);

            var viewModel = new MapPageViewModel(
                tinkApp,
                locationPermission,
                NSubstitute.Substitute.For<Plugin.BLE.Abstractions.Contracts.IBluetoothLE>(),
                NSubstitute.Substitute.For<IGeolocation>(),
                (mapspan) => { },
                viewService,
                navigationService);

            try
            {
                await viewModel.OnAppearing(); // Is called when page shows.

                Assert.IsNull(viewModel.Exception);

                // Verify pins on map
                Assert.AreEqual(21, viewModel.Pins.Count); // Were 2 pins when loading from CopriCallsMemory(SampleSets.Set2, 1, sessionCookie)
                Assert.That(
                    viewModel.Pins.FirstOrDefault(pin => pin.Icon.Id.Contains("Open_Green")).Tag, // Was station 5
                    Is.EqualTo("FR103"),
                    "Station FR101 must be marked green because there is are bike.");
                Assert.That(
                    viewModel.Pins.FirstOrDefault(pin => pin.Icon.Id.Contains("Open_Red")).Tag, // Was station 14
                    Is.EqualTo("KN12"),
                    "Station KN12 must be marked red because there is no bike.");

                // Verify buttons
                Assert.IsTrue(viewModel.IsToggleVisible, "TINK and Konrad are activated in settings.");
                Assert.AreEqual(Color.Gray, viewModel.TinkColor, "TINK bikes are hidden.");

                Assert.AreEqual(Color.Red, viewModel.KonradColor, "Konrad bikes are shown.");

                Assert.IsTrue(
                    new[] { "Updating...", "" }.Contains(viewModel.StatusInfoText),
                    "Text might be \"Updating...\" or empty depending on acivity of update thread.");
            }
            finally
            {
                await viewModel.OnDisappearing();
            }
        }

        [Test]
        public async Task TestConstruct_KonradOnly()
        {
            var tinkApp = new TinkApp(
                new TINK.Model.Settings.Settings(
                    new GroupFilterMapPage(new Dictionary<string, FilterState> { { FilterHelper.CITYBIKE, FilterState.On } }),
                    new GroupFilterSettings(new Dictionary<string, FilterState> { { FilterHelper.CARGOBIKE, FilterState.Off }, { FilterHelper.CITYBIKE, FilterState.On } }),
                    new Uri("https://tinkwwp.copri-bike.de/APIjsonserver"),
                    new TINK.Settings.PollingParameters(new TimeSpan(10000), true),
                    Serilog.Events.LogEventLevel.Error,
                    activeLockService: typeof(LocksServiceMock).FullName,
                    activeGeolocationService: typeof(GeolocationMock).FullName),
                new StoreMock(),
                (isConnected, uri, sessionCookie, mail, expiresAfter) => new ConnectorCache(new AppContextInfo("MyMerchId", "MyApp", new Version(1, 2)), sessionCookie, mail, new CopriCallsMemory001(sessionCookie)),
                "MyMerchId",
                Substitute.For<IServicesContainer<IGeolocation>>(),
                new LocksServiceMock(),
                new DeviceMock(),
                new SpecialFolderMock(),
                null, // Cipher
                new PermissionsMock(),
                isConnectedFunc: () => true,
                currentVersion: new Version(3, 2, 0, 115), // Current app version
                lastVersion: new Version(3, 0, 173)); // Current app version. Must be larger or equal 3.0.173 to 

            var viewService = Substitute.For<IViewService>();
            var navigationService = Substitute.For<INavigation>();
            var locationPermission = Substitute.For<ILocationPermission>();

            locationPermission.CheckStatusAsync().Returns(Status.Granted);

            var viewModel = new MapPageViewModel(
                tinkApp,
                locationPermission,
                Substitute.For<Plugin.BLE.Abstractions.Contracts.IBluetoothLE>(),
                Substitute.For<IGeolocation>(),
                (mapspan) => { },
                viewService,
                navigationService);

            try
            {
                await viewModel.OnAppearing(); // Is called when page shows.

                Assert.IsNull(viewModel.Exception);

                // Verify pins on map
                Assert.AreEqual(21, viewModel.Pins.Count); // Were 2 when loading from CopriCallsMemory(SampleSets.Set2, 1, sessionCookie)
                Assert.That(
                    viewModel.Pins.FirstOrDefault(pin => pin.Icon.Id.Contains("Open_Green")).Tag, // Was station id 31
                    Is.EqualTo("FR103"),
                    "Station FR101 must be marked green because there is are bike.");
                Assert.That(
                    viewModel.Pins.FirstOrDefault(pin => pin.Icon.Id.Contains("Open_Red")).Tag, // Was 14
                    Is.EqualTo("KN12"),
                    "Station KN12 must be marked red because there is no bike.");

                // Verify buttons
                Assert.IsFalse(viewModel.IsToggleVisible, "TINK and Konrad is deactivated from settings.");

                Assert.IsTrue(
                    new[] { "Updating...", "" }.Contains(viewModel.StatusInfoText),
                    "Text might be \"Updating...\" or empty depending on acivity of update thread.");
            }
            finally
            {
                await viewModel.OnDisappearing();
            }
        }

        [Test]
        public  async Task TestConstruct_TinkOnly()
        {
            var tinkApp = new TinkApp(
                new TINK.Model.Settings.Settings(
                    new GroupFilterMapPage(new Dictionary<string, FilterState> { { FilterHelper.CARGOBIKE, FilterState.On } }),
                    new GroupFilterSettings(new Dictionary<string, FilterState> { { FilterHelper.CARGOBIKE, FilterState.On }, { FilterHelper.CITYBIKE, FilterState.On } }),
                    new Uri("https://tinkwwp.copri-bike.de/APIjsonserver"),
                    new TINK.Settings.PollingParameters(new TimeSpan(10000), true),
                    Serilog.Events.LogEventLevel.Error,
                    activeLockService: typeof(LocksServiceMock).FullName,
                    activeGeolocationService: typeof(GeolocationMock).FullName),
                new StoreMock(),
                (isConnected, uri, sessionCookie, mail, expiresAfter) => new ConnectorCache(new AppContextInfo("MyMerchId", "MyApp", new Version(1, 2)), sessionCookie, mail, new CopriCallsMemory001( sessionCookie)),
                "MyMerchId",
                Substitute.For<IServicesContainer<IGeolocation>>(),
                new LocksServiceMock(),
                new DeviceMock(),
                new SpecialFolderMock(),
                null, // Cipher
                new PermissionsMock(),
                isConnectedFunc: () => true,
                currentVersion: new Version(3, 2, 0, 115), // Current app version
                lastVersion: new Version(3, 0, 173)); 

            var viewService = Substitute.For<IViewService>();
            var navigationService = Substitute.For<INavigation>();
            var locationPermission = Substitute.For<ILocationPermission>();

            locationPermission.CheckStatusAsync().Returns(Status.Granted);

            var viewModel = new MapPageViewModel(
                tinkApp,
                locationPermission,
                Substitute.For<Plugin.BLE.Abstractions.Contracts.IBluetoothLE>(),
                Substitute.For<IGeolocation>(),
                (mapspan) => { },
                viewService,
                navigationService);

            try
            {
                await viewModel.OnAppearing(); // Is called when page shows.

                Assert.IsNull(viewModel.Exception);

                // Verify pins on map
                Assert.AreEqual(27, viewModel.Pins.Count); // Were 8 pin when loading from CopriCallsMemory(SampleSets.Set2, 1, sessionCookie)
                Assert.That(
                    viewModel.Pins.FirstOrDefault(pin => pin.Icon.Id.Contains("Open_Green")).Tag,
                    Is.EqualTo("FR101"), // Was station id 4
                    "Station FR101 must be marked green because there is are bike.");
                Assert.That(
                    viewModel.Pins.FirstOrDefault(pin => pin.Icon.Id.Contains("Open_Red")).Tag, // Was 31
                    Is.EqualTo("KN12"), // Was station id 31
                    "Station KN12 must be marked red because there is no bike.");

                // Verify buttons
                Assert.IsFalse(viewModel.IsToggleVisible, "TINK and Konrad is deactivated from settings.");

                Assert.IsTrue(
                    new[] { "Updating...", "" }.Contains(viewModel.StatusInfoText),
                    "Text might be \"Updating...\" or empty depending on acivity of update thread.");
            }
            finally
            {
                await viewModel.OnDisappearing();
            }
        }

        [Test]
        public async Task TestConstruct_Offline()
        {
            var tinkApp = new TinkApp(
                new TINK.Model.Settings.Settings(
                    new GroupFilterMapPage(new Dictionary<string, FilterState> { { FilterHelper.CARGOBIKE, FilterState.On }, { FilterHelper.CITYBIKE, FilterState.Off } }),
                    new GroupFilterSettings(new Dictionary<string, FilterState> { { FilterHelper.CARGOBIKE, FilterState.On }, { FilterHelper.CITYBIKE, FilterState.On } }),
                    new Uri("https://tinkwwp.copri-bike.de/APIjsonserver"),
                    new TINK.Settings.PollingParameters(new TimeSpan(10000), true),
                    Serilog.Events.LogEventLevel.Error,
                    activeLockService: typeof(LocksServiceMock).FullName,
                    activeGeolocationService: typeof(GeolocationMock).FullName),
                new StoreMock(),
                (isConnected, uri, sessionCookie, mail, expiresAfter) => new ConnectorCache(new AppContextInfo("MyMerchId", "MyApp", new Version(1, 2)), sessionCookie, mail, new CopriCallsMemory001( sessionCookie)),
                "MyMerchId",
                Substitute.For<IServicesContainer<IGeolocation>>(),
                new LocksServiceMock(),
                new DeviceMock(),
                new SpecialFolderMock(),
                null, // Cipher
                new PermissionsMock(),
                isConnectedFunc: () => false,
                currentVersion: new Version(3, 2, 0, 115), // Current app version
                lastVersion: new Version(3, 0, 173)); // Current app version. Must be larger or equal 3.0.173 to 

            var viewService = Substitute.For<IViewService>();
            var navigationService = Substitute.For<INavigation>();
            var locationPermission = Substitute.For<ILocationPermission>();

            locationPermission.CheckStatusAsync().Returns(Status.Granted);

            var viewModel = new MapPageViewModel(
                tinkApp,
                locationPermission,
                Substitute.For<Plugin.BLE.Abstractions.Contracts.IBluetoothLE>(),
                Substitute.For<IGeolocation>(),
                (mapspan) => { },
                viewService,
                navigationService);

            try
            {
                await viewModel.OnAppearing(); // Is called when page shows.

                Assert.IsNull(viewModel.Exception);

                // Verify pins on map
                Assert.AreEqual(27, viewModel.Pins.Count); // Were 8 pins when loading from CopriCallsMemory(SampleSets.Set2, 1, sessionCookie)
                Assert.That(
                    viewModel.Pins.FirstOrDefault(pin => pin.Icon.Id.Contains("Open_Green")).Tag, // Was station id 4
                    Is.EqualTo("FR101"),
                    "Station FR101 must be marked green because there is are bike.");
                Assert.That(
                    viewModel.Pins.FirstOrDefault(pin => pin.Icon.Id.Contains("Open_Red")).Tag, // Was 31
                    Is.EqualTo("KN12"),
                    "Station KN12 must be marked red because there is no bike.");

                // Verify buttons
                Assert.IsTrue(viewModel.IsToggleVisible, "TINK and Konrad are activated in settings.");
                Assert.AreEqual(Color.Blue, viewModel.TinkColor, "TINK bikes are hidden.");

                Assert.AreEqual(Color.Gray, viewModel.KonradColor, "Konrad bikes are shown.");


                Assert.AreEqual("Offline.",  viewModel.StatusInfoText);
            }
            finally
            {
                await viewModel.OnDisappearing();
            }
        }

        [Test]
        public async Task TestConstruct_WebConnectCommunicationError()
        {
            var tinkApp = new TinkApp(
                new TINK.Model.Settings.Settings(
                    new GroupFilterMapPage(new Dictionary<string, FilterState> { { FilterHelper.CARGOBIKE, FilterState.On }, { FilterHelper.CITYBIKE, FilterState.Off } }),
                    new GroupFilterSettings(new Dictionary<string, FilterState> { { FilterHelper.CARGOBIKE, FilterState.On }, { FilterHelper.CITYBIKE, FilterState.On } }),
                    new Uri("https://tinkwwp.copri-bike.de/APIjsonserver"),
                    new TINK.Settings.PollingParameters(new TimeSpan(10000), true),
                    Serilog.Events.LogEventLevel.Error,
                    true /* IsReportLevelVerbose */,
                    activeLockService: typeof(LocksServiceMock).FullName,
                    activeGeolocationService: typeof(GeolocationMock).FullName),
                new StoreMock(),
                (isConnected, uri, sessionCookie, mail, expiresAfter) => new TINK.Model.Connector.Connector(
                    uri,
                    new AppContextInfo("oiF2kahH", "sharee.bike.test", new Version(3, 0, 267)),
                    sessionCookie,
                    mail,
                    server: new CopriProviderHttps(
                        uri,
                        TinkApp.MerchantId,
                        new AppContextInfo("oiF2kahH", "sharee.bike.test", new Version(3, 0, 267)),
                        sessionCookie: sessionCookie,
                        cacheServer: new CopriCallsCacheMemory001(sessionCookie: sessionCookie),
                        httpsServer: new ExceptionServer((msg) => new WebConnectFailureException(msg, new Exception("Source expection."))))),
                "MyMerchId",
                Substitute.For<IServicesContainer<IGeolocation>>(),
                new LocksServiceMock(),
                new DeviceMock(),
                new SpecialFolderMock(),
                null, // Cipher
                new PermissionsMock(),
                isConnectedFunc: () => false,
                currentVersion: new Version(3, 2, 0, 115), // Current app version
                lastVersion: new Version(3, 0, 173)); // Current app version. Must be larger or equal 3.0.173 to 

            var viewService = Substitute.For<IViewService>();
            var navigationService = Substitute.For<INavigation>();
            var locationPermission = Substitute.For<ILocationPermission>();

            locationPermission.CheckStatusAsync().Returns(Status.Granted);

            var viewModel = new MapPageViewModel(
                tinkApp,
                locationPermission,
                Substitute.For<Plugin.BLE.Abstractions.Contracts.IBluetoothLE>(),
                Substitute.For<IGeolocation>(),
                (mapspan) => { },
                viewService,
                navigationService);

            try
            {
                await viewModel.OnAppearing(); // Is called when page shows.

                Assert.AreEqual(
                    "Simulated error thrown at GetStationsAsync.",
                    viewModel.Exception.Message);

                // Verify pins on map
                Assert.AreEqual(27, viewModel.Pins.Count);
                Assert.That(
                    viewModel.Pins.FirstOrDefault(pin => pin.Icon.Id.Contains("Open_Green")).Tag, // Was station id 4
                    Is.EqualTo("FR101"),
                    "Station FR101 must be marked green because there is are bike.");
                Assert.That(
                    viewModel.Pins.FirstOrDefault(pin => pin.Icon.Id.Contains("Open_Red")).Tag, // Was 31
                    Is.EqualTo("KN12"),
                    "Station KN12 must be marked red because there is no bike.");

                // Verify buttons
                Assert.IsTrue(viewModel.IsToggleVisible, "TINK and Konrad are activated in settings.");
                Assert.AreEqual(Color.Blue, viewModel.TinkColor, "TINK bikes are hidden.");

                Assert.AreEqual(Color.Gray, viewModel.KonradColor, "Konrad bikes are shown.");

                Assert.AreEqual("Connection interrupted, server unreachable.", viewModel.StatusInfoText);
            }
            finally
            {
                await viewModel.OnDisappearing();
            }
        }

        [Test]
        public async Task TestConstruct_GeneralPurposeCommunicationError()
        {
            var tinkApp = new TinkApp(
                new TINK.Model.Settings.Settings(
                    new GroupFilterMapPage(new Dictionary<string, FilterState> { { FilterHelper.CARGOBIKE, FilterState.On }, { FilterHelper.CITYBIKE, FilterState.Off } }),
                    new GroupFilterSettings(new Dictionary<string, FilterState> { { FilterHelper.CARGOBIKE, FilterState.On }, { FilterHelper.CITYBIKE, FilterState.On } }),
                    new Uri("https://tinkwwp.copri-bike.de/APIjsonserver"),
                    new TINK.Settings.PollingParameters(new TimeSpan(10000), true),
                    Serilog.Events.LogEventLevel.Error,
                    true /* IsReportLevelVerbose */, 
                    activeLockService: typeof(LocksServiceMock).FullName,
                    activeGeolocationService: typeof(GeolocationMock).FullName),
                new StoreMock(),
                (isConnected, uri, sessionCookie, mail, expiresAfter) => new TINK.Model.Connector.Connector(
                    uri,
                    new AppContextInfo("oiF2kahH", "sharee.bike.test", new Version(3, 0, 267)),
                    sessionCookie,
                    mail,
                    server: new CopriProviderHttps(
                        uri,
                        TinkApp.MerchantId,
                        new AppContextInfo("oiF2kahH", "sharee.bike.test", new Version(3, 0, 267)),
                        sessionCookie: sessionCookie,
                        cacheServer: new CopriCallsCacheMemory001(sessionCookie: sessionCookie),
                        httpsServer: new ExceptionServer((msg) => new Exception(msg)))),
                "MyMerchId",
                Substitute.For<IServicesContainer<IGeolocation>>(),
                new LocksServiceMock(),
                new DeviceMock(),
                new SpecialFolderMock(),
                null, // Cipher
                new PermissionsMock(),
                isConnectedFunc: () => false,
                currentVersion: new Version(3, 2, 0, 115), // Current app version
                lastVersion: new Version(3, 0, 173)); // Current app version. Must be larger or equal 3.0.173 to 


            var viewService = Substitute.For<IViewService>();
            var navigationService = Substitute.For<INavigation>();
            var locationPermission = Substitute.For<ILocationPermission>();

            locationPermission.CheckStatusAsync().Returns(Status.Granted);

            var viewModel = new MapPageViewModel(
                tinkApp,
                locationPermission,
                Substitute.For<Plugin.BLE.Abstractions.Contracts.IBluetoothLE>(),
                Substitute.For<IGeolocation>(),
                (mapspan) => { },
                viewService,
                navigationService);

            try
            {
                await viewModel.OnAppearing(); // Is called when page shows.

                Assert.AreEqual(
                    "Simulated error thrown at GetStationsAsync.",
                    viewModel.Exception.Message);

                // Verify pins on map
                Assert.AreEqual(27, viewModel.Pins.Count);
                Assert.That(
                    viewModel.Pins.Where(pin => pin.Icon.Id.Contains("Open_Green")).Select(pin => pin.Tag.ToString()),
                    Does.Contain("FR101"), // Was station id 4
                    "Station FR103 must be marked green because there is are bike.");
                Assert.That(
                    viewModel.Pins.Where(pin => pin.Icon.Id.Contains("Open_Red")).Select(pin => pin.Tag.ToString()),
                    Does.Contain("KN12"), // Was station id 31
                    "Station 31 must be marked red because there is no bike.");

                // Verify buttons
                Assert.IsTrue(viewModel.IsToggleVisible, "TINK and Konrad are activated in settings.");
                Assert.AreEqual(Color.Blue , viewModel.TinkColor, "TINK bikes are hidden.");

                Assert.AreEqual(Color.Gray, viewModel.KonradColor, "Konrad bikes are shown.");

                Assert.AreEqual("Connection interrupted.", viewModel.StatusInfoText);
            }
            finally
            {
                await viewModel.OnDisappearing();
            }
        }
    }
}