How to unit test with ILogger in ASP.NET Core
Just mock it as well as any other dependency: var mock = new Mock<ILogger<BlogController>>(); ILogger<BlogController> logger = mock.Object; //or use this short equivalent logger = Mock.Of<ILogger<BlogController>>() var controller = new BlogController(logger); You probably will need to install Microsoft.Extensions.Logging.Abstractions package to use ILogger<T>. Moreover you can create a real logger: var serviceProvider = new ServiceCollection() .AddLogging() … Read more