handle unnamed packages

[DhruvDh]

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

public class Exam2Test {
    @Before
    public void setUp() {
        // Setup code here (if required)
    }

    @After
    public void tearDown() {
        // Teardown code here (if required)
    }

    @Test
    public void testQuestion1() {
        var solution = (score1, score2, score3) -> {
            float total = score1 + score2 + score3;
            float avg = total / 3.0;

            if (avg >= 90) {
                return 'A';
            } else if (avg >= 80) {
                return 'B';
            } else if (avg >= 70) {
                return 'C';
            } else if (avg >= 60) {
                return 'D';
            } else {
                return 'F';
            }
        };

        for (int i = 0; i < 10; i++) {
            var score1 = (int) (Math.random() * 100);
            var score2 = (int) (Math.random() * 100);
            var score3 = (int) (Math.random() * 100);

            var actual = (new Exam2()).question1(score1, score2, score3);
            var expected = solution(score1, score2, score3);

            assertEquals(actual, expected);
        }
    }
}

says

Error: Something went wrong while discovering the project.

Caused by:
    Expected exactly one package name, found 0.