I'm trying to create a test case for Leetcode problem, but I'm stuck with it. (https://leetcode.com/problems/two-sum/solution/)

Please point out what I've got wrong and teach me how to create a proper testcase.

public class Sum { 5 public static void main (String[] args) { System.out.println("the answer is: " + twoSum( y target: 5); } = 1 public static int[] twoSum (int[] nums, int target) { for (int i = 0; i