Day02: Add failing test

AdventOfCode2018.Tests/AdventOfCode2018.Tests.csproj

@@ -57,6 +57,7 @@
   </Choose>
   <ItemGroup>
     <Compile Include="Day01_Tests.cs" />
+    <Compile Include="Day02_Tests.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
   <ItemGroup>

AdventOfCode2018.Tests/Day02_Tests.cs

@@ -0,0 +1,26 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace AdventOfCode2018.Tests
+{
+    [TestClass()]
+    public class Day02_Tests
+    {
+        [TestMethod()]
+        public void ResolveDay02__Test1()
+        {
+            Day02 day02 = new Day02();
+
+            string result = day02.ResolveDay02(new string[] {
+                "abcdef",
+                "bababc",
+                "abbcde",
+                "abcccd",
+                "aabcdd",
+                "abcdee",
+                "ababab",
+            });
+
+            Assert.AreEqual("12", result);
+        }
+    }
+}