TwoSumsTest.java

import static org.junit.Assert.*;
import org.junit.Test;

public class TwoSumsTest {

    @Test
    public void testStudentOneSolution() {
        int[] nums = { 2, 7, 11, 15 };
        int target = 18;
        int[][] expectedPairs = {{2, 16}, {7, 11}};
        int[][] expectedIndices = {{0, 3}, {1, 2}};

        // Replace StudentOneSolution with the actual name of the class submitted by the first student
        int[][] actualPairs = StudentOneSolution.findPairs(nums, target);
        int[][] actualIndices = StudentOneSolution.findIndices(nums, target);

        assertArrayEquals(expectedPairs, actualPairs);
        assertArrayEquals(expectedIndices, actualIndices);
    }

    @Test
    public void testStudentTwoSolution() {
        int[] nums = { 2, 7, 11, 15 };
        int target = 18;
        int[][] expectedPairs = {{2, 16}, {7, 11}};
        int[][] expectedIndices = {{0, 3}, {1, 2}};

        // Replace StudentTwoSolution with the actual name of the class submitted by the second student
        int[][] actualPairs = StudentTwoSolution.findPairs(nums, target);
        int[][] actualIndices = StudentTwoSolution.findIndices(nums, target);

        assertArrayEquals(expectedPairs, actualPairs);
        assertArrayEquals(expectedIndices, actualIndices);
    }

    @Test
    public void testStudentThreeSolution() {
        int[] nums = { 2, 7, 11, 15 };