Adds a few unit tests for integer extension methods

Former-commit-id: 456bf78a23c676691a90f7bfe1149673e5e0d79d

src/ImageProcessor.UnitTests/Extensions/IntegerExtensionsUnitTests.cs

@@ -0,0 +1,38 @@
+// --------------------------------------------------------------------------------------------------------------------
+// <copyright file="IntegerExtensionsUnitTests.cs" company="James South">
+//   Copyright (c) James South.
+//   Licensed under the Apache License, Version 2.0.
+// </copyright>
+// <summary>
+//   Runs unit tests on the <see cref="IntegerExtensions" /> extension methods
+// </summary>
+// --------------------------------------------------------------------------------------------------------------------
+
+namespace ImageProcessor.UnitTests
+{
+    using System;
+    using Common.Extensions;
+    using NUnit.Framework;
+
+    /// <summary>
+    /// Provides a test harness for the integer extension class
+    /// </summary>
+    [TestFixture]
+    public class IntegerExtensionsUnitTests
+    {
+        /// <summary>
+        /// Tests the "ToByte" extension
+        /// </summary>
+        /// <param name="input">Integer input</param>
+        /// <param name="expected">Expected result</param>
+        [Test]
+        [TestCase(21, 0x15)]
+        [TestCase(190, 0xBE)]
+        [TestCase(3156, 0xFF)]
+        public void ToByteTest(int input, byte expected)
+        {
+            var result = input.ToByte();
+            Assert.AreEqual(expected, result);
+        }
+    }
+}

src/ImageProcessor.UnitTests/ImageProcessor.UnitTests.csproj

@@ -47,6 +47,7 @@
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Compile>
     <Compile Include="Extensions\DoubleExtensionsUnitTests.cs" />
+    <Compile Include="Extensions\IntegerExtensionsUnitTests.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <ItemGroup>