Kapitel 7 abgeschlossen.

LehrerApp.Data.Tests/RepositoryTests.cs

@@ -40,6 +40,37 @@ public sealed class RepositoryTests
         Assert.Equal(2, repo.GetAll(includeInactive: true).Count);
     }
 
+    [Fact]
+    public void StudentRepository_Delete_LehntVerknuepfteDatenAb()
+    {
+        using var db = NewInMemoryContext();
+        var repo = new StudentRepository(db);
+        var student = new Student { FirstName = "Anna", LastName = "Beispiel" };
+        repo.Save(student);
+        db.Memberships.Insert(new GroupMembership { StudentId = student.Id, GroupId = Guid.NewGuid() });
+        db.Grades.Insert(new Grade { StudentId = student.Id, GroupId = Guid.NewGuid(), Value = "2" });
+
+        var references = repo.GetReferenceSummary(student.Id);
+
+        Assert.Equal(1, references.Memberships);
+        Assert.Equal(1, references.Grades);
+        Assert.Throws<InvalidOperationException>(() => repo.Delete(student.Id));
+        Assert.NotNull(repo.GetById(student.Id));
+    }
+
+    [Fact]
+    public void StudentRepository_Delete_EntferntUnverknuepftenSchueler()
+    {
+        using var db = NewInMemoryContext();
+        var repo = new StudentRepository(db);
+        var student = new Student { FirstName = "Anna", LastName = "Beispiel" };
+        repo.Save(student);
+
+        repo.Delete(student.Id);
+
+        Assert.Null(repo.GetById(student.Id));
+    }
+
     // ── GroupRepository ───────────────────────────────────────────────────────
 
     [Fact]
@@ -66,6 +97,53 @@ public sealed class RepositoryTests
         Assert.NotNull(groupRepo.GetAll(includeInactive: true).FirstOrDefault(g => g.Name == "Mathe G"));
     }
 
+    [Fact]
+    public void ArchivierteGruppe_BlockiertZentraleSchreibvorgaenge()
+    {
+        using var db = NewInMemoryContext();
+        var groupRepo = new GroupRepository(db);
+        var group = new LearningGroup { Name = "8a", SchoolYear = "2025/26", IsActive = true };
+        groupRepo.Save(group);
+        group.IsActive = false;
+        groupRepo.Save(group);
+
+        var membership = new GroupMembership { GroupId = group.Id, StudentId = Guid.NewGuid() };
+        var exam = new Exam { GroupId = group.Id, Title = "Test" };
+
+        Assert.Throws<InvalidOperationException>(() => new GroupMembershipRepository(db).Save(membership));
+        Assert.Throws<InvalidOperationException>(() => new ExamRepository(db).Save(exam));
+        Assert.Throws<InvalidOperationException>(() => new GradeRepository(db).Save(
+            new Grade { GroupId = group.Id, StudentId = Guid.NewGuid(), Value = "2" }));
+        Assert.Throws<InvalidOperationException>(() => new UnitRepository(db).Save(
+            new Unit { GroupId = group.Id, Title = "Einheit" }));
+        Assert.Throws<InvalidOperationException>(() => new TimetableSlotRepository(db).Save(
+            new TimetableSlot { GroupId = group.Id, Weekday = DayOfWeek.Monday, PeriodNumber = 1 }));
+    }
+
+    [Fact]
+    public void ArchivierteGruppe_MussVorKorrekturSeparatReaktiviertWerden()
+    {
+        using var db = NewInMemoryContext();
+        var repo = new GroupRepository(db);
+        var group = new LearningGroup { Name = "8a", SchoolYear = "2025/26", IsActive = true };
+        repo.Save(group);
+        group.IsActive = false;
+        repo.Save(group);
+
+        var archived = repo.GetById(group.Id)!;
+        archived.Name = "Geändert";
+        Assert.Throws<InvalidOperationException>(() => repo.Save(archived));
+        archived.IsActive = true;
+        Assert.Throws<InvalidOperationException>(() => repo.Save(archived));
+
+        archived.Name = "8a";
+        repo.Save(archived);
+        archived.Name = "8b";
+        repo.Save(archived);
+
+        Assert.Equal("8b", repo.GetById(group.Id)!.Name);
+    }
+
     [Fact]
     public void GroupRepository_Delete_LoeschtAlleAbhaengigenDatensaetzeKaskadierend()
     {