import static org.junit.jupiter.api.Assertions.assertArrayEquals;
import org.junit.jupiter.api.Test;

public class Es4 {

    static int[][] copiaMatrice(int[][] m) {
        int[][] r = new int[m.length][];
        for (int i = 0; i < m.length; i++) {
            r[i] = new int[m[i].length];
            for (int j = 0; j < m[i].length; j++) {
                r[i][j] = m[i][j];
            }
        }
        return r;
    }

    @Test
    void test1() {
        int[] l = {1, 2, 0};
        int[][] m = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
        Es3.raddoppia(l, m);
        assertArrayEquals(new int[][] {{1, 4, 3}, {4, 5, 12}, {14, 8, 9}},m);
    }

    @Test
    void test2() {
        int[][] m = new int[3][3];
        for (int i = 0; i < m.length; i++) {
            for (int j = 0; j < m[i].length; j++) {
                m[i][j] = (int)(Math.random() * 10);
            }
        }
        int[][] expected = copiaMatrice(m);
        Es3.raddoppia(new int[]{0,0,0}, m);
        for (int i = 0; i < expected.length; i++) {
            expected[i][0] *= 2;
        }
        assertArrayEquals(expected, m);
    }
}