IBKRTrader/tests/IBKRTrader.Tests/Web/LogStreamServiceTests.cs

using FluentAssertions;
using IBKRTrader.Core.Logging;
using IBKRTrader.Hosting.Web;

namespace IBKRTrader.Tests.Web;

[Trait("cat", "unit")]
public class LogStreamServiceTests
{
    [Fact]
    public void GetRecent_CapturesLogEntries_AndCapsAtRingBufferSize()
    {
        var logger = new LoggingService();
        using var sut = new LogStreamService(logger);

        for (int i = 0; i < 150; i++)
        {
            logger.Info("TestModule", $"Message {i}");
        }

        var recent = sut.GetRecent();
        recent.Count.Should().Be(100);
    }

    [Fact]
    public void Dispose_UnsubscribesFromLogger()
    {
        var logger = new LoggingService();
        var sut = new LogStreamService(logger);

        logger.Info("TestModule", "Before dispose");
        sut.GetRecent().Count.Should().Be(1);

        sut.Dispose();

        logger.Info("TestModule", "After dispose");
        sut.GetRecent().Count.Should().Be(1);
    }
}