Copy default unicode hash function into the Tests project. Adjust ref…

…erences

and usings.

TallyUnitTest/Platform/UnicodeHashFunction.cs

@@ -0,0 +1,55 @@
+using System;
+using System.Globalization;
+
+namespace NetTally.Tests.Platform
+{
+    public static class UnicodeHashFunction
+    {
+        /// <summary>
+        /// Hashes the provided string using the given CompareOptions.
+        /// Doing this allows all custom compare options to be applied in determining the hash value.
+        /// </summary>
+        /// <param name="str">The string.</param>
+        /// <param name="info">The CompareInfo object doing the unicode-aware comparison.</param>
+        /// <param name="options">The options to apply to the comparison.</param>
+        /// <returns>Returns the hash code for the string.</returns>
+        public static int HashFunction(string str, CompareInfo info, CompareOptions options)
+        {
+            if (info == null)
+                throw new ArgumentNullException(nameof(info));
+
+            if (string.IsNullOrEmpty(str))
+                return 0;
+
+            SortKey sortOrder = info.GetSortKey(str, options);
+
+            int hash = GetByteArrayHash(sortOrder.KeyData);
+
+            return hash;
+        }
+
+        /// <summary>
+        /// Generates a hash code for an array of bytes.
+        /// </summary>
+        /// <param name="keyData">The key data.</param>
+        /// <returns>Returns a hash code value.</returns>
+        private static int GetByteArrayHash(byte[] keyData)
+        {
+            unchecked
+            {
+                const int p = 16777619;
+                int hash = (int)2166136261;
+
+                for (int i = 0; i < keyData.Length; i++)
+                    hash = (hash ^ keyData[i]) * p;
+
+                hash += hash << 13;
+                hash ^= hash >> 7;
+                hash += hash << 3;
+                hash ^= hash >> 17;
+                hash += hash << 5;
+                return hash;
+            }
+        }
+    }
+}

TallyUnitTest/TallyUnitTest.csproj

@@ -54,6 +54,7 @@
   </Choose>
   <ItemGroup>
     <Compile Include="ForumAdapterFactoryUnitTest.cs" />
+    <Compile Include="Platform\UnicodeHashFunction.cs" />
     <Compile Include="PostComponentsTests.cs" />
     <Compile Include="QuestTests.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />

TallyUnitTest/VoteConstructorTests.cs

@@ -15,7 +15,7 @@ public class VoteConstructorTests
         [ClassInitialize]
         public static void ClassInit(TestContext context)
         {
-            StringUtility.InitStringComparers(DefaultUnicodeHashFunction.HashFunction);
+            StringUtility.InitStringComparers(Platform.UnicodeHashFunction.HashFunction);
             sampleQuest = new Quest();
         }
 

TallyUnitTest/VoteCounterTests.cs

@@ -17,7 +17,7 @@ public class VoteCounterTests
         [ClassInitialize]
         public static void ClassInit(TestContext context)
         {
-            StringUtility.InitStringComparers(DefaultUnicodeHashFunction.HashFunction);
+            StringUtility.InitStringComparers(Platform.UnicodeHashFunction.HashFunction);
             sampleQuest = new Quest();
             voteCounterRaw = VoteCounterImpl.Instance;
         }