Added JUnit to dependencies, simple test case and toString methods to Node and LinkedList.

Author: Olcay Taner YILDIZ

pom.xml

@@ -13,4 +13,13 @@
         <maven.compiler.target>8</maven.compiler.target>
     </properties>
 
+    <dependencies>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.13.1</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
 </project>

src/main/java/LinkedList.java

@@ -66,4 +66,13 @@ public int numberOfElements(){
         return count;
     }
 
+    public String toString(){
+        StringBuilder result = new StringBuilder();
+        Node tmp = head;
+        while (tmp != null) {
+            result.append(tmp).append(" ");
+            tmp = tmp.getNext();
+        }
+        return result.toString();
+    }
 }

src/main/java/Node.java

@@ -19,4 +19,8 @@ public int getData(){
         return data;
     }
 
+    public String toString(){
+        return "" + data;
+    }
+
 }

src/test/java/LinkedListTest.java

@@ -0,0 +1,13 @@
+import org.junit.Test;
+
+public class LinkedListTest {
+
+    @Test
+    public void Test1(){
+        LinkedList list = new LinkedList();
+        list.insertFirst(new Node(4));
+        list.insertFirst(new Node(5));
+        list.insertFirst(new Node(6));
+        System.out.println(list.toString());
+    }
+}