LibLogXUnitLogger.cs

public sealed class LibLogXUnitLogger : ILogProvider
    {
        private readonly ITestOutputHelper _output;

        public LibLogXUnitLogger(ITestOutputHelper output)
        {
            // based on https://github.com/damianh/LibLog/blob/master/src/LibLog.Example.ColoredConsoleLogProvider/ColoredConsoleLogProvider.cs
            _output = output;
        }

        public Logger GetLogger(string name)
        {
            return (logLevel, messageFunc, exception, formatParameters) =>
            {
                if (messageFunc == null)
                {
                    // verifies logging level is enabled
                    return true;
                }

                string message = string.Format(CultureInfo.InvariantCulture, messageFunc(), formatParameters);
                string record = string.Format(
                    CultureInfo.InvariantCulture,
                    "{0} {1} {2}",
                    DateTime.Now,
                    logLevel,
                    message);

                if (exception != null)
                {
                    record = string.Format(
                        CultureInfo.InvariantCulture,
                        "{0}:{1}{2}",
                        record,
                        Environment.NewLine,
                        exception);
                }

                _output.WriteLine(record);
                return true;
            };
        }

        public IDisposable OpenMappedContext(string key, string value)
        {
            return NullDisposable.Instance;
        }

        public IDisposable OpenNestedContext(string message)
        {
            return NullDisposable.Instance;
        }

        private class NullDisposable : IDisposable
        {
            internal static readonly IDisposable Instance = new NullDisposable();

            public void Dispose()
            { }
        }
    }