Break up JsonTextReaderTest class into smaller test classes

Src/Newtonsoft.Json.Tests/TestObjects/JsonTextReaderTests/FakeArrayPool.cs

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+#region License
+// Copyright (c) 2007 James Newton-King
+//
+// Permission is hereby granted, free of charge, to any person
+// obtaining a copy of this software and associated documentation
+// files (the "Software"), to deal in the Software without
+// restriction, including without limitation the rights to use,
+// copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the
+// Software is furnished to do so, subject to the following
+// conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+#endregion
+
+using System.Collections.Generic;
+#if NET20
+using Newtonsoft.Json.Utilities.LinqBridge;
+#else
+using System.Linq;
+#endif
+
+namespace Newtonsoft.Json.Tests.TestObjects.JsonTextReaderTests
+{
+    public class FakeArrayPool : IArrayPool<char>
+    {
+        public readonly List<char[]> FreeArrays = new List<char[]>();
+        public readonly List<char[]> UsedArrays = new List<char[]>();
+
+        public char[] Rent(int minimumLength)
+        {
+            char[] a = FreeArrays.FirstOrDefault(b => b.Length >= minimumLength);
+            if (a != null)
+            {
+                FreeArrays.Remove(a);
+                UsedArrays.Add(a);
+
+                return a;
+            }
+
+            a = new char[minimumLength];
+            UsedArrays.Add(a);
+
+            return a;
+        }
+
+        public void Return(char[] array)
+        {
+            if (UsedArrays.Remove(array))
+            {
+                FreeArrays.Add(array);
+
+                // smallest first so the first array large enough is rented
+                FreeArrays.Sort((b1, b2) => Comparer<int>.Default.Compare(b1.Length, b2.Length));
+            }
+        }
+    }
+}