Adding assig4

4/ClassLibraryProjects/StringLibraryTests/StringLibraryTests.cs

@@ -0,0 +1,43 @@
+using UtilityLibraries;
+
+namespace StringLibraryTests;
+
+[TestClass]
+public sealed class StringLibraryTests
+{
+    [TestMethod]
+    public void TestStartsWithUpper()
+    {
+        string[] words = ["Alphabet", "Zebra", "ABC", "Something", "Nothing"];
+
+        foreach (string word in words)
+        {
+            bool result = word.StartsWithUpper();
+            Assert.IsTrue(result, $"Expected for '{word}': true; Actual: {result}");
+        }
+    }
+
+    [TestMethod]
+    public void TestDoesNotStartWithUpper()
+    {
+        string[] words = ["alphabet", "zebra", "abc", "nothing", "something", "1234", ".", ";", " "];
+
+        foreach (string word in words)
+        {
+            bool result = word.StartsWithUpper();
+            Assert.IsFalse(result, $"Expected for '{word}': false; Actual: {result}");
+        }
+    }
+
+    [TestMethod]
+    public void DirectCallWithNullOrEmpty()
+    {
+        string?[] words = [string.Empty, null];
+
+        foreach (string? word in words)
+        {
+            bool result = StringLibrary.StartsWithUpper(word);
+            Assert.IsFalse(result, $"Expected for '{word ?? "<null>"}': false; Actual: {result}");
+        }
+    }
+}