Merge pull request #154 from aspnet/ajbaaska/logging

Using NullLogger types from Logging.Abstractions

Author: ajaybhargavb

test/Microsoft.AspNetCore.Session.Tests/SessionTests.cs

@@ -16,6 +16,7 @@
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Internal;
 using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Logging.Abstractions;
 using Microsoft.Extensions.Logging.Testing;
 using Microsoft.Net.Http.Headers;
 using Xunit;
@@ -417,7 +418,7 @@ public async Task RefreshesSession_WhenSessionData_IsNotModified()
                 })
                 .ConfigureServices(services =>
                 {
-                    services.AddSingleton(typeof(ILoggerFactory), new NullLoggerFactory());
+                    services.AddSingleton(typeof(ILoggerFactory), NullLoggerFactory.Instance);
                     services.AddDistributedMemoryCache();
                     services.AddSession(o => o.IdleTimeout = TimeSpan.FromMinutes(20));
                     services.Configure<MemoryCacheOptions>(o => o.Clock = clock);