Create SinglyLinkedListTest.java

src/test/java/com/nbee/solution/practice/SinglyLinkedListTest.java

@@ -0,0 +1,15 @@
+package com.nbee.solution.practice;
+
+import org.junit.Test;
+
+public class SinglyLinkedListTest {
+    private SinglyLinkedList list = new SinglyLinkedList();
+    @Test
+    public void singlyLinkedListAddFirstTest(){
+        list.addFirst(1);
+        list.addFirst(3);
+        list.addFirst(5);
+        list.addFirst(6);
+        list.loop0(i -> System.out.println(i + " "));
+    }
+}