InMemoryLogger

Microsoft.Extensions.Logging compatible logger for recording log messages during tests

Getting started

Install from NuGet:

> dotnet add package InMemoryLogger 

Then add InMemoryLogger as the logger in your applications service collection:

varservices=newServiceCollection().AddLogging(x =>x.AddInMemory()).BuildServiceProvider();varinMemLogger=services.GetService<InMemoryLogger>();

And then write a test that asserts on logs messages:

varlogger=services.GetService<ILogger<MyTest>>();logger.LogWarning("This is a log message");Assert.Contains(inMemLogger.RecordedWarningLogs, l =>l.Message=="This is a log message");

Or on logged exceptions:

varlogger=services.GetService<ILogger<MyTest>>();varexpected=newException();logger.LogError(expected,"This is another log message");Assert.Contains(inMemLogger.RecordedErrorLogs, l =>l.Exception==expected);

That's it. All logs are in memory, all logs are recorded.