test fix

Author: nareshwart

src/main/java/com/devopsdemo/tutorial/addressbook/AddressbookUI.java

@@ -17,11 +17,11 @@
 @Route("/")
 public class AddressbookUI extends VerticalLayout {
 
-    private final TextField filter = new TextField("Filter contacts...");
-    private final Grid<Contact> contactList = new Grid<>(Contact.class);
+    final TextField filter = new TextField("Filter contacts...");
+    final Grid<Contact> contactList = new Grid<>(Contact.class);
     final Button newContact = new Button("New contact");
-    private final ContactForm contactForm = new ContactForm();
-    private final ContactService service = ContactService.createDemoService();
+    final ContactForm contactForm = new ContactForm();
+    final ContactService service = ContactService.createDemoService();
 
     public AddressbookUI() {
         contactForm.setListener(new ContactForm.ContactFormListener() {

src/main/java/com/devopsdemo/utilities/HexAsciiConvertor.java

@@ -32,6 +32,13 @@ public static String hexToAscii(String hexValue) {
         return convertHexToASCII(hexValue);
     }
 
+    /**
+     * Alias for convertAsciiToHex to match test usage.
+     */
+    public static String asciiToHex(String asciiValue) {
+        return convertAsciiToHex(asciiValue);
+    }
+
     /**
      * Converts ASCII values into hexadecimal.
      *

src/main/java/com/devopsdemo/utilities/StringUtilities.java

@@ -39,6 +39,15 @@ public class StringUtilities {
 		PRIMITIVE_NAME_TYPE_MAP.put("double", Double.class);
 	}
 
+	/**
+	 * Checks if a string is null or empty.
+	 * @param input the string to check
+	 * @return true if null or empty, false otherwise
+	 */
+	public static boolean isNullOrEmpty(String input) {
+		return input == null || input.isEmpty();
+	}
+
 	/**
 	 * Reverses the given string.
 	 * @param input the string to reverse

src/test/java/com/devopsdemo/utilities/TestGenericComparator.java

@@ -245,19 +245,19 @@ private Integer writeList(ArrayList s){
 
     @org.junit.jupiter.api.Test
     void testCompareEqualObjects() {
-        GenericComparator<String> comparator = new GenericComparator<>();
+        GenericComparator comparator = new GenericComparator();
         assertEquals(0, comparator.compare("test", "test"));
     }
 
     @org.junit.jupiter.api.Test
     void testCompareDifferentObjects() {
-        GenericComparator<Integer> comparator = new GenericComparator<>();
+        GenericComparator comparator = new GenericComparator();
         assertTrue(comparator.compare(1, 2) < 0);
     }
 
     @org.junit.jupiter.api.Test
     void testCompareNullObjects() {
-        GenericComparator<String> comparator = new GenericComparator<>();
+        GenericComparator comparator = new GenericComparator();
         assertThrows(NullPointerException.class, () -> comparator.compare(null, "test"));
         assertThrows(NullPointerException.class, () -> comparator.compare("test", null));
     }