Day01: Add failing tests

AdventOfCode2018.Tests/Day01_Tests.cs

@@ -0,0 +1,48 @@
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace AdventOfCode2018.Tests
+{
+    [TestClass()]
+    public class Day01_Tests
+    {
+        [TestMethod()]
+        public void ResolveDay01__Test1()
+        {
+            Day01 day01 = new Day01();
+
+            string result = day01.ResolveDay01(new string[] { "+1", "-2", "+3", "+1", });
+
+            Assert.AreEqual("3", result);
+        }
+
+        [TestMethod()]
+        public void ResolveDay01__Test2()
+        {
+            Day01 day01 = new Day01();
+
+            string result = day01.ResolveDay01(new string[] { "+1", "+1", "+1", });
+
+            Assert.AreEqual("3", result);
+        }
+
+        [TestMethod()]
+        public void ResolveDay01__Test3()
+        {
+            Day01 day01 = new Day01();
+
+            string result = day01.ResolveDay01(new string[] { "+1", "+1", "-2", });
+
+            Assert.AreEqual("0", result);
+        }
+
+        [TestMethod()]
+        public void ResolveDay01__Test4()
+        {
+            Day01 day01 = new Day01();
+
+            string result = day01.ResolveDay01(new string[] { "-1", "-2", "-3", });
+
+            Assert.AreEqual("-6", result);
+        }
+    }
+}