aspnetcore/test/Microsoft.AspNetCore.Hosting.Tests/Fakes/CustomLoggerFactory.cs

// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

using System;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Logging.Abstractions;

namespace Microsoft.AspNetCore.Hosting.Fakes
{
    public class CustomLoggerFactory : ILoggerFactory
    {
        public void CustomConfigureMethod() { }

        public void AddProvider(ILoggerProvider provider) { }

        public ILogger CreateLogger(string categoryName) => NullLogger.Instance;

        public void Dispose() { }
    }

    public static class CustomLoggerFactoryExtensions
    {
        public static IWebHostBuilder ConfigureCustomLogger(this IWebHostBuilder builder, Action<CustomLoggerFactory> configureLogger)
        {
            builder.UseLoggerFactory(_ => new CustomLoggerFactory());
            builder.ConfigureLogging(configureLogger);
            return builder;
        }
    }

    public class SubLoggerFactory : CustomLoggerFactory { }

    public class NonSubLoggerFactory : ILoggerFactory
    {
        public void CustomConfigureMethod() { }

        public void AddProvider(ILoggerProvider provider) { }

        public ILogger CreateLogger(string categoryName) => NullLogger.Instance;

        public void Dispose() { }
    }
}