LehrerApp/LehrerApp.Desktop.Tests/AiSettingsServiceTests.cs

using LehrerApp.Desktop.Services;
using Xunit;

namespace LehrerApp.Desktop.Tests;

public sealed class AiSettingsServiceTests
{
    private static string BuildTempPath()
    {
        var path = Path.Combine(Path.GetTempPath(), $"lehrerapp-aisettingssvc-tests-{Guid.NewGuid():N}");
        Directory.CreateDirectory(path);
        return path;
    }

    [Fact]
    public void SetEnabled_PersistiertUeberNeueInstanz()
    {
        var path = BuildTempPath();
        new AiSettingsService(path).SetEnabled(true);

        var reloaded = new AiSettingsService(path);

        Assert.True(reloaded.Enabled);
    }

    [Fact]
    public void SetCredentialsAndToken_TokenIstVerschluesseltAbrufbar()
    {
        var service = new AiSettingsService(BuildTempPath());

        service.SetCredentialsAndToken("sebastian", "geheimes-token-123");

        Assert.True(service.IsLoggedIn);
        Assert.Equal("sebastian", service.Username);
        Assert.Equal("geheimes-token-123", service.GetToken());
    }

    [Fact]
    public void Token_UeberlebtNeueInstanzMitDemselbenPfad()
    {
        var path = BuildTempPath();
        new AiSettingsService(path).SetCredentialsAndToken("sebastian", "token-abc");

        var reloaded = new AiSettingsService(path);

        Assert.True(reloaded.IsLoggedIn);
        Assert.Equal("token-abc", reloaded.GetToken());
    }

    [Fact]
    public void TokenDateiEnthaeltNichtDenKlartext()
    {
        var path = BuildTempPath();
        var service = new AiSettingsService(path);
        service.SetCredentialsAndToken("sebastian", "geheimes-token-123");

        var raw = File.ReadAllText(Path.Combine(path, "ai-settings.json"));

        Assert.DoesNotContain("geheimes-token-123", raw);
    }

    [Fact]
    public void Logout_EntferntToken()
    {
        var service = new AiSettingsService(BuildTempPath());
        service.SetCredentialsAndToken("sebastian", "token-abc");

        service.Logout();

        Assert.False(service.IsLoggedIn);
        Assert.Null(service.GetToken());
    }
}