Datensicherheit: Backup, Verschlüsselung, App-Sperre (Kapitel 13.3)
Automatisches rollierendes Backup der Datenbank beim Start mit Wiederherstellung über die Einstellungen, versionierte Schema-Migration, optionale Passwort-Verschlüsselung der LiteDB-Datei und eine App-Sperre nach Inaktivität mit eigenem Passwort. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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using LehrerApp.Core.Services;
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using Xunit;
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namespace LehrerApp.Tests;
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public sealed class AppLockServiceTests
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{
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[Fact]
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public void NeueKonfiguration_IstStandardmaessigDeaktiviert()
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{
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using var temp = new TempAppData();
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var service = new AppLockService(temp.Path);
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Assert.False(service.IsEnabled);
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Assert.False(service.HasPassword);
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}
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[Fact]
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public void SetPassword_VerifyPassword_KorrektesPasswortWirdAkzeptiert()
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{
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using var temp = new TempAppData();
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var service = new AppLockService(temp.Path);
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service.SetPassword("geheim123");
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Assert.True(service.HasPassword);
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Assert.True(service.VerifyPassword("geheim123"));
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Assert.False(service.VerifyPassword("falsch"));
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}
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[Fact]
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public void Configure_WirdUeberNeueInstanzHinwegPersistiert()
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{
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using var temp = new TempAppData();
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var first = new AppLockService(temp.Path);
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first.SetPassword("geheim123");
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first.Configure(enabled: true, timeoutMinutes: 15);
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var second = new AppLockService(temp.Path);
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Assert.True(second.IsEnabled);
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Assert.Equal(15, second.TimeoutMinutes);
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Assert.True(second.VerifyPassword("geheim123"));
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}
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[Fact]
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public void VerifyPassword_OhneGesetztesPasswort_GibtFalseZurueck()
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{
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using var temp = new TempAppData();
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var service = new AppLockService(temp.Path);
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Assert.False(service.VerifyPassword("irgendwas"));
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}
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[Fact]
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public void Configure_TimeoutUnterEinerMinute_WirdAufEineMinuteBegrenzt()
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{
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using var temp = new TempAppData();
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var service = new AppLockService(temp.Path);
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service.Configure(enabled: true, timeoutMinutes: 0);
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Assert.Equal(1, service.TimeoutMinutes);
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}
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private sealed class TempAppData : IDisposable
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{
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public string Path { get; } = System.IO.Path.Combine(
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System.IO.Path.GetTempPath(), $"lehrerapp-applock-tests-{Guid.NewGuid():N}");
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public TempAppData() => Directory.CreateDirectory(Path);
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public void Dispose() { if (Directory.Exists(Path)) Directory.Delete(Path, recursive: true); }
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}
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}
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