SpamGuard/tests/SpamGuard.Tests/State/TrustedSenderStoreTests.cs

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

using SpamGuard.State;

public class TrustedSenderStoreTests : IDisposable
{
    private readonly string _tempDir;
    private readonly TrustedSenderStore _store;

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

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

    [Fact]
    public void IsTrusted_ReturnsFalse_WhenEmpty()
    {
        Assert.False(_store.IsTrusted("someone@example.com"));
    }

    [Fact]
    public void IsTrusted_ReturnsTrue_AfterAdd()
    {
        _store.Add("someone@example.com");
        Assert.True(_store.IsTrusted("someone@example.com"));
    }

    [Fact]
    public void IsTrusted_IsCaseInsensitive()
    {
        _store.Add("Someone@Example.COM");
        Assert.True(_store.IsTrusted("someone@example.com"));
    }

    [Fact]
    public void IsTrusted_TrimsWhitespace()
    {
        _store.Add("  someone@example.com  ");
        Assert.True(_store.IsTrusted("someone@example.com"));
    }

    [Fact]
    public void AddRange_AddsMultiple()
    {
        _store.AddRange(["a@b.com", "c@d.com", "e@f.com"]);
        Assert.True(_store.IsTrusted("a@b.com"));
        Assert.True(_store.IsTrusted("c@d.com"));
        Assert.True(_store.IsTrusted("e@f.com"));
    }

    [Fact]
    public void Save_And_Load_RoundTrips()
    {
        _store.Add("a@b.com");
        _store.Add("c@d.com");
        _store.Save();

        var loaded = new TrustedSenderStore(_tempDir);
        Assert.True(loaded.IsTrusted("a@b.com"));
        Assert.True(loaded.IsTrusted("c@d.com"));
        Assert.False(loaded.IsTrusted("x@y.com"));
    }

    [Fact]
    public void Count_ReturnsCorrectValue()
    {
        _store.AddRange(["a@b.com", "c@d.com"]);
        Assert.Equal(2, _store.Count);
    }
}