Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

external/aspnetwebstack/test/System.Web.Http.Test/Tracing/TestTraceWriter.cs

@@ -0,0 +1,32 @@
+// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
+
+using System.Collections.Generic;
+using System.Net.Http;
+
+namespace System.Web.Http.Tracing
+{
+    /// <summary>
+    /// Test spy used internally to capture <see cref="TraceRecord"/>s.
+    /// </summary>
+    internal class TestTraceWriter : ITraceWriter
+    {
+        private List<TraceRecord> _traceRecords = new List<TraceRecord>();
+
+        public IList<TraceRecord> Traces { get { return _traceRecords;  } }
+
+        public bool IsEnabled(string category, TraceLevel level)
+        {
+            return true;
+        }
+
+        public void Trace(HttpRequestMessage request, string category, TraceLevel level, Action<TraceRecord> traceAction)
+        {
+            TraceRecord traceRecord = new TraceRecord(request, category, level);
+            traceAction(traceRecord);
+            lock (_traceRecords)
+            {
+                _traceRecords.Add(traceRecord);
+            }
+        }
+    }
+}