Testing und interfaces

F4SD.Cockpit.Client.Test/Basics/Sevices/TicketOverview/TicketOverviewUpdateServiceTest.cs

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+using FasdDesktopUi.Basics.Services;
+using FasdDesktopUi.Basics.Services.Models;
+
+namespace F4SD.Cockpit.Client.Test.Basics.Sevices.TicketOverview;
+
+public class TicketOverviewUpdateServiceTest
+{
+    [Fact]
+    public async Task UpdateAvailability_FirstFetch_EmitsInitializationEventsForBothScopes()
+    {
+        // Arrange
+        var communication = new FakeCommunication();
+        communication.SetCounts(TileScope.Personal, new Dictionary<string, int>(StringComparer.OrdinalIgnoreCase)
+        {
+            ["TicketsNew"] = 2
+        });
+        communication.SetCounts(TileScope.Role, new Dictionary<string, int>(StringComparer.OrdinalIgnoreCase)
+        {
+            ["TicketsNew"] = 5
+        });
+
+        var service = CreateService(communication, out _);
+        var events = new List<TicketOverviewCountsChangedEventArgs>();
+        service.OverviewCountsChanged += (_, args) => events.Add(args);
+
+        // Act
+        service.UpdateAvailability(true);
+        await WaitUntilAsync(() => service.AreAllScopesInitialized);
+
+        // Assert
+        Assert.Equal(2, events.Count);
+        Assert.All(events, e => Assert.Empty(e.Changes));
+        Assert.Contains(events, e => e.InitializedScope == TileScope.Personal);
+        Assert.Contains(events, e => e.InitializedScope == TileScope.Role);
+        Assert.Equal(2, service.CurrentCounts["TicketsNew"].Personal);
+        Assert.Equal(5, service.CurrentCounts["TicketsNew"].Role);
+    }
+
+    [Fact]
+    public async Task FetchAsync_ChangedAndUnchangedCounts_EmitsOnlyRealDeltaEvent()
+    {
+        // Arrange
+        var communication = new FakeCommunication();
+        communication.SetCounts(TileScope.Personal, new Dictionary<string, int>(StringComparer.OrdinalIgnoreCase)
+        {
+            ["TicketsNew"] = 1
+        });
+        communication.SetCounts(TileScope.Role, new Dictionary<string, int>(StringComparer.OrdinalIgnoreCase)
+        {
+            ["TicketsNew"] = 3
+        });
+
+        var service = CreateService(communication, out _);
+        var events = new List<TicketOverviewCountsChangedEventArgs>();
+        service.OverviewCountsChanged += (_, args) => events.Add(args);
+
+        service.UpdateAvailability(true);
+        await WaitUntilAsync(() => service.AreAllScopesInitialized);
+        events.Clear();
+
+        // Act + Assert (changed)
+        communication.SetCounts(TileScope.Personal, new Dictionary<string, int>(StringComparer.OrdinalIgnoreCase)
+        {
+            ["TicketsNew"] = 4
+        });
+        await service.FetchAsync(TileScope.Personal);
+
+        Assert.Single(events);
+        Assert.Single(events[0].Changes);
+        Assert.Equal("TicketsNew", events[0].Changes[0].Key);
+        Assert.Equal(1, events[0].Changes[0].OldCount);
+        Assert.Equal(4, events[0].Changes[0].NewCount);
+        Assert.Equal(3, events[0].Changes[0].Delta);
+
+        // Act + Assert (unchanged)
+        events.Clear();
+        await service.FetchAsync(TileScope.Personal);
+        Assert.Empty(events);
+    }
+
+    [Fact]
+    public async Task Stop_ResetsInitializationAndCounts()
+    {
+        // Arrange
+        var communication = new FakeCommunication();
+        communication.SetCounts(TileScope.Personal, new Dictionary<string, int>(StringComparer.OrdinalIgnoreCase)
+        {
+            ["TicketsNew"] = 7
+        });
+        communication.SetCounts(TileScope.Role, new Dictionary<string, int>(StringComparer.OrdinalIgnoreCase)
+        {
+            ["IncidentNew"] = 9
+        });
+
+        var service = CreateService(communication, out _);
+
+        service.UpdateAvailability(true);
+        await WaitUntilAsync(() => service.AreAllScopesInitialized);
+
+        // Act
+        service.Stop();
+
+        // Assert
+        Assert.False(service.IsScopeInitialized(TileScope.Personal));
+        Assert.False(service.IsScopeInitialized(TileScope.Role));
+        Assert.All(service.CurrentCounts.Values, value =>
+        {
+            Assert.Equal(0, value.Personal);
+            Assert.Equal(0, value.Role);
+        });
+    }
+
+    private static TicketOverviewUpdateService CreateService(FakeCommunication communication, out FakeDispatcher dispatcher)
+    {
+        dispatcher = new FakeDispatcher();
+        var source = new FakeCommunicationSource(communication);
+        var settings = new FakeSettingsProvider();
+        return new TicketOverviewUpdateService(source, dispatcher, settings);
+    }
+
+    private static async Task WaitUntilAsync(Func<bool> condition, int timeoutMs = 2000)
+    {
+        var startedAt = DateTime.UtcNow;
+        while (!condition())
+        {
+            if ((DateTime.UtcNow - startedAt).TotalMilliseconds > timeoutMs)
+            {
+                throw new TimeoutException("Condition was not reached within timeout.");
+            }
+
+            await Task.Delay(10);
+        }
+    }
+
+    private sealed class FakeCommunicationSource : ITicketOverviewCommunicationSource
+    {
+        private readonly ITicketOverviewCommunication _communication;
+
+        public FakeCommunicationSource(ITicketOverviewCommunication communication)
+        {
+            _communication = communication;
+        }
+
+        public ITicketOverviewCommunication Resolve()
+        {
+            return _communication;
+        }
+    }
+
+    private sealed class FakeCommunication : ITicketOverviewCommunication
+    {
+        private Dictionary<string, int> _personalCounts = new Dictionary<string, int>(StringComparer.OrdinalIgnoreCase);
+        private Dictionary<string, int> _roleCounts = new Dictionary<string, int>(StringComparer.OrdinalIgnoreCase);
+
+        public bool IsDemo()
+        {
+            return false;
+        }
+
+        public Task<Dictionary<string, int>> GetTicketOverviewCounts(string[] overviewKeys, bool useRoleScope)
+        {
+            var source = useRoleScope ? _roleCounts : _personalCounts;
+            return Task.FromResult(new Dictionary<string, int>(source, StringComparer.OrdinalIgnoreCase));
+        }
+
+        public void RegisterGeneratedTicket(FasdCockpitCommunicationDemo.DemoTicketRecord record)
+        {
+        }
+
+        public void SetCounts(TileScope scope, Dictionary<string, int> counts)
+        {
+            var copy = counts == null
+                ? new Dictionary<string, int>(StringComparer.OrdinalIgnoreCase)
+                : new Dictionary<string, int>(counts, StringComparer.OrdinalIgnoreCase);
+
+            if (scope == TileScope.Role)
+            {
+                _roleCounts = copy;
+            }
+            else
+            {
+                _personalCounts = copy;
+            }
+        }
+    }
+
+    private sealed class FakeDispatcher : ITicketOverviewDispatcher
+    {
+        public Task InvokeAsync(Action action)
+        {
+            action();
+            return Task.CompletedTask;
+        }
+
+        public Task InvokeAsync(Func<Task> action)
+        {
+            return action();
+        }
+
+        public ITicketOverviewTimer CreateTimer(TimeSpan interval, Action tick)
+        {
+            return new FakeTimer(interval, tick);
+        }
+    }
+
+    private sealed class FakeSettingsProvider : ITicketOverviewSettingsProvider
+    {
+        public int GetPollingMinutes(TileScope scope)
+        {
+            return 1;
+        }
+    }
+
+    private sealed class FakeTimer : ITicketOverviewTimer
+    {
+        private readonly Action _tick;
+
+        public FakeTimer(TimeSpan interval, Action tick)
+        {
+            Interval = interval;
+            _tick = tick;
+        }
+
+        public TimeSpan Interval { get; set; }
+
+        public bool IsEnabled { get; private set; }
+
+        public void Start()
+        {
+            IsEnabled = true;
+        }
+
+        public void Stop()
+        {
+            IsEnabled = false;
+        }
+
+        public void Fire()
+        {
+            _tick?.Invoke();
+        }
+    }
+}