MockLogger for assertions of Microsoft.Extensions.Logger

Mockogger.cs

    public abstract class MockLogger<T> : ILogger<T>
    {
        void ILogger.Log<TState>(
            LogLevel logLevel,
            EventId eventId,
            TState state,
            Exception exception,
            Func<TState, Exception, string> formatter)
            => Log(logLevel, formatter(state, exception));

        public abstract void Log(LogLevel logLevel, string message);

        public virtual bool IsEnabled(LogLevel logLevel) => true;

        public abstract IDisposable BeginScope<TState>(TState state);
    }
    

    // Asserts
    /*
    MockLogger<T> logger = Substitute.For<MockLogger<T>>();
    new UnderTest(logger).DoSomething();
    logger.Received().Log(Arg.Any<LogLevel>(), Arg.Is<string>(s => s.Contains("some log message")));
    */