SpamGuard/tests/SpamGuard.Tests/State/ProcessedUidStoreTests.cs

// tests/SpamGuard.Tests/State/ProcessedUidStoreTests.cs
namespace SpamGuard.Tests.State;

using SpamGuard.State;

public class ProcessedUidStoreTests : IDisposable
{
    private readonly string _tempDir;
    private readonly ProcessedUidStore _store;

    public ProcessedUidStoreTests()
    {
        _tempDir = Path.Combine(Path.GetTempPath(), $"spamguard-test-{Guid.NewGuid()}");
        Directory.CreateDirectory(_tempDir);
        _store = new ProcessedUidStore(_tempDir);
    }

    public void Dispose()
    {
        if (Directory.Exists(_tempDir))
            Directory.Delete(_tempDir, true);
    }

    [Fact]
    public void Contains_ReturnsFalse_WhenUidNotAdded()
    {
        Assert.False(_store.Contains(42));
    }

    [Fact]
    public void Contains_ReturnsTrue_AfterAdd()
    {
        _store.Add(42);
        Assert.True(_store.Contains(42));
    }

    [Fact]
    public void Add_IsDuplicate_DoesNotThrow()
    {
        _store.Add(42);
        _store.Add(42);
        Assert.True(_store.Contains(42));
    }

    [Fact]
    public void Save_And_Load_RoundTrips()
    {
        _store.Add(1);
        _store.Add(2);
        _store.Add(3);
        _store.Save();

        var loaded = new ProcessedUidStore(_tempDir);
        Assert.True(loaded.Contains(1));
        Assert.True(loaded.Contains(2));
        Assert.True(loaded.Contains(3));
        Assert.False(loaded.Contains(4));
    }

    [Fact]
    public void Prune_RemovesOldEntries()
    {
        _store.Add(1, DateTime.UtcNow.AddDays(-31));
        _store.Add(2, DateTime.UtcNow);
        _store.Prune(TimeSpan.FromDays(30));

        Assert.False(_store.Contains(1));
        Assert.True(_store.Contains(2));
    }
}