route logs to correct test output helper for the older confluence kafka tests

Author: Fredrik Arvidsson

tests/Confluent.Kafka.1.1.0.Tests/TestSpecificationAsync.cs

@@ -1,4 +1,5 @@
-using System.Threading.Tasks;
+using System;
+using System.Threading.Tasks;
 using Log.It;
 using Log.It.With.NLog;
 using Microsoft.Extensions.Configuration;
@@ -10,6 +11,8 @@ namespace Kafka.TestFramework.Tests
 {
     public class TestSpecificationAsync : XUnit2SpecificationAsync
     {
+        private readonly IDisposable _logWriter;
+
         static TestSpecificationAsync()
         {
             var config = new ConfigurationBuilder()
@@ -19,23 +22,18 @@ static TestSpecificationAsync()
 
             NLog.LogManager.Configuration = new NLogLoggingConfiguration(config.GetSection("NLog"));
             LogFactory.Initialize(new NLogFactory(new LogicalThreadContext()));
+            NLogCapturingTarget.Subscribe += Output.Writer.WriteLine;
         }
 
         public TestSpecificationAsync(ITestOutputHelper testOutputHelper) : base(testOutputHelper)
         {
-            NLogCapturingTarget.Subscribe += TestOutputHelper.WriteLine;
-        }
-
-        protected virtual Task TearDownAsync()
-        {
-            return Task.CompletedTask;
+            _logWriter = Output.WriteTo(testOutputHelper);
         }
 
         protected sealed override async Task DisposeAsync(bool disposing)
         {
-            NLogCapturingTarget.Subscribe -= TestOutputHelper.WriteLine;
-            await TearDownAsync();
             await base.DisposeAsync(disposing);
+            _logWriter.Dispose();
         }
     }
 }