PersonControllerTests.cs

public class PersonControllerTests
{
  public PersonControllerTests(ITestOutputHelper output)
  {
      var correlationId = Guid.NewGuid().ToString();
      var logger = new LoggerConfiguration()
          .MinimumLevel.Debug()
          .Enrich.FromLogContext()
          .WriteTo.XunitTestOutput(output,
              outputTemplate: "{Timestamp:u} [{Level}] ({CorrelationId}) {Message}{NewLine}{Exception}")
          .CreateLogger().ForContext("CorrelationId", correlationId);
      _loggerFactory = new LoggerFactory();
      _loggerFactory.AddSerilog(logger);
  }

  private readonly ILoggerFactory _loggerFactory;

  [Fact]
  public void Get_persons()
  {
      //Act
      var controller = new PersonController(_loggerFactory);
      var result = controller.Get();

      //Assert
      Assert.Contains("value1", result);
      Assert.Contains("value2", result);
  }
}