feat: expand teaching mode with live timeline and seating quick checks

LehrerApp.Desktop.Tests/SeatingQuickCheckTests.cs

@@ -0,0 +1,81 @@
+using LehrerApp.Core.Models;
+using LehrerApp.Desktop.ViewModels.Groups;
+using Xunit;
+
+namespace LehrerApp.Desktop.Tests;
+
+public sealed class SeatingQuickCheckTests
+{
+    private static (SeatingPlanTabViewModel Vm, FakeEntries Entries, ParticipationSession Session, Student Student) Build(bool readOnly = false)
+    {
+        var group = Guid.NewGuid();
+        var student = new Student { FirstName = "Anna", LastName = "Beispiel" };
+        var session = new ParticipationSession { GroupId = group, Date = DateOnly.FromDateTime(DateTime.Today) };
+        var entries = new FakeEntries();
+        var plan = new SeatingPlan { GroupId = group, Rows = 1, Columns = 2,
+            Assignments = [new SeatAssignment { Row = 0, Column = 0, StudentId = student.Id }] };
+        var vm = new SeatingPlanTabViewModel(new FakeSeatingPlans([plan]), new FakeStudents([student]),
+            new FakeMemberships([new GroupMembership { GroupId = group, StudentId = student.Id }]),
+            new FakeSessions([session]), entries, new FakeAspects());
+        vm.Initialize(group, readOnly);
+        return (vm, entries, session, student);
+    }
+
+    [Fact] public void Attendance_UsesSeatAndPreservesExistingHomeworkAndCounters()
+    {
+        var (vm, entries, session, student) = Build();
+        entries.Save(new ParticipationEntry { SessionId = session.Id, StudentId = student.Id,
+            Homework = HomeworkStatus.Completed, RaisedHandCount = 3, CalledOnCount = 2 });
+        vm.CheckAttendanceCommand.Execute(null);
+        var seat = vm.Seats[0];
+        Assert.True(seat.ShowQuickCheck);
+        Assert.False(vm.Seats[1].ShowQuickCheck);
+        seat.QuickNegativeCommand.Execute(null);
+        var entry = entries.GetBySessionAndStudent(session.Id, student.Id)!;
+        Assert.Equal(AttendanceStatus.ExcusePending, entry.Attendance);
+        Assert.Equal(HomeworkStatus.Completed, entry.Homework);
+        Assert.Equal(3, entry.RaisedHandCount);
+        Assert.Equal(2, entry.CalledOnCount);
+        Assert.Equal(1, seat.DisplayOpacity);
+        seat.QuickPositiveCommand.Execute(null);
+        Assert.Equal(AttendanceStatus.Present, entry.Attendance);
+    }
+
+    [Fact] public void Homework_UpdatesLegacyFlagAndPreservesAttendance()
+    {
+        var (vm, entries, session, student) = Build();
+        entries.Save(new ParticipationEntry { SessionId = session.Id, StudentId = student.Id, Attendance = AttendanceStatus.Late });
+        vm.CheckHomeworkCommand.Execute(null);
+        vm.Seats[0].QuickNegativeCommand.Execute(null);
+        var entry = entries.GetBySessionAndStudent(session.Id, student.Id)!;
+        Assert.Equal(HomeworkStatus.MissingOpen, entry.Homework);
+        Assert.True(entry.HomeworkMissing);
+        Assert.Equal(AttendanceStatus.Late, entry.Attendance);
+        vm.Seats[0].QuickPositiveCommand.Execute(null);
+        Assert.Equal(HomeworkStatus.Completed, entry.Homework);
+        Assert.False(entry.HomeworkMissing);
+        vm.EndQuickCheckCommand.Execute(null);
+        Assert.False(vm.Seats[0].ShowQuickCheck);
+        Assert.True(vm.Seats[0].ShowNormalActions);
+    }
+
+    [Fact] public async Task SpecialCases_OpenAssessmentForClickedStudentAndSession()
+    {
+        var (vm, _, _, _) = Build();
+        var calls = 0;
+        vm.OnAssessStudent = _ => { calls++; return Task.CompletedTask; };
+        vm.CheckAttendanceCommand.Execute(null);
+        await vm.Seats[0].QuickSpecialCommand.ExecuteAsync(null);
+        Assert.Equal(1, calls);
+    }
+
+    [Fact] public void ReadOnlyAndEmptySeats_CannotWriteQuickChecks()
+    {
+        var (vm, entries, session, _) = Build(readOnly: true);
+        vm.CheckHomeworkCommand.Execute(null);
+        vm.Seats[0].QuickNegativeCommand.Execute(null);
+        vm.Seats[1].QuickPositiveCommand.Execute(null);
+        Assert.False(vm.Seats[0].ShowQuickCheck);
+        Assert.Empty(entries.GetBySession(session.Id));
+    }
+}