refactor 19

Author: fishercoder1534

src/test/java/com/fishercoder/_19Test.java

@@ -0,0 +1,28 @@
+package com.fishercoder;
+
+import com.fishercoder.common.classes.ListNode;
+import com.fishercoder.common.utils.LinkedListUtils;
+import com.fishercoder.solutions._19;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+public class _19Test {
+    private static _19.Solution1 solution1;
+    private static ListNode head;
+    private static ListNode expected;
+
+    @BeforeClass
+    public static void setup() {
+        solution1 = new _19.Solution1();
+    }
+
+    @Test
+    public void test1() {
+        head = LinkedListUtils.contructLinkedList(new int[]{1, 2, 3, 4, 5});
+        expected = LinkedListUtils.contructLinkedList(new int[]{1, 2, 3, 5});
+        assertEquals(expected, solution1.removeNthFromEnd(head, 2));
+    }
+
+}