meziantou/Meziantou.Extensions.Logging.InMemoryv1.3.9
✓ Verified.NET 8.0.NET 9.0.NET 10.0
An in-memory implementation of Microsoft.Extension.Logging.ILogger
Get Started
$ dotnet add package Meziantou.Extensions.Logging.InMemoryReadme
Meziantou.Extensions.Logging.InMemory
using var loggerProvider = new InMemoryLoggerProvider();
var logger = loggerProvider.CreateLogger("sample");
var typedLogger = loggerProvider.CreateLogger<Sample>();
// Short version if you need a single logger instance:
var singleLogger = InMemoryLogger.CreateLogger("sample");
var singleTypedLogger = InMemoryLogger.CreateLogger<Sample>();
// do stuff with the logger
// Assert
Assert.Empty(loggerProvider.Logs.Errors);
Assert.Single(loggerProvider.Logs, log => log.Message.Contains("test") && log.EventId.Id == 1);
If you are using a WebApplicationFactory:
using var loggerProvider = new InMemoryLoggerProvider();
using var factory = new WebApplicationFactory<Program>()
.WithWebHostBuilder(builder =>
{
builder.ConfigureLogging(builder =>
{
// You can override the logging configuration if needed
//builder.SetMinimumLevel(LogLevel.Trace);
//builder.AddFilter(_ => true);
builder.Services.AddSingleton<ILoggerProvider>(loggerProvider);
});
});
Blog post about testing logging: How to test the logs from ILogger in .NET