lmxopcua/tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.TwinCAT.Tests/TwinCATFactoryLoggerTests.cs

using Microsoft.Extensions.Logging;
using Shouldly;
using Xunit;
using ZB.MOM.WW.OtOpcUa.Core.Hosting;

namespace ZB.MOM.WW.OtOpcUa.Driver.TwinCAT.Tests;

/// <summary>#602 CONV-3: the TwinCAT factory hands the host logger factory to the driver.</summary>
[Trait("Category", "Unit")]
public sealed class TwinCATFactoryLoggerTests
{
    private sealed class RecordingLoggerFactory : ILoggerFactory
    {
        public List<string> Categories { get; } = [];
        public ILogger CreateLogger(string categoryName)
        {
            lock (Categories) Categories.Add(categoryName);
            return Microsoft.Extensions.Logging.Abstractions.NullLogger.Instance;
        }
        public void AddProvider(ILoggerProvider provider) { }
        public void Dispose() { }
    }

    [Fact]
    public void Registered_factory_creates_the_driver_logger_from_the_host_factory()
    {
        var lf = new RecordingLoggerFactory();
        var registry = new DriverFactoryRegistry();
        TwinCATDriverFactoryExtensions.Register(registry, lf);

        var drv = registry.TryGet(TwinCATDriverFactoryExtensions.DriverTypeName)!("drv-1", "{}");

        drv.ShouldBeOfType<TwinCATDriver>();
        lf.Categories.ShouldContain(typeof(TwinCATDriver).FullName!);
    }

    [Fact]
    public void Registering_without_a_logger_factory_still_works()
    {
        var registry = new DriverFactoryRegistry();
        TwinCATDriverFactoryExtensions.Register(registry);
        registry.TryGet(TwinCATDriverFactoryExtensions.DriverTypeName)!("drv-1", "{}").ShouldBeOfType<TwinCATDriver>();
    }
}