@Test
    public void getMaxDiagonal1Product() {
        String expected = "[1, 0][0, 1] [1, 1][0, 2] [2, 0][1, 1] [2, 1][1, 2] ";
        int numbers = 2;
        String actual = "";
        for (int x = numbers - 1; x < DATA.length; x++) {
            for (int y = 0; y + numbers <= DATA.length; y++) {
                for (int offset = 0; offset < numbers; offset++) {
                    actual += ("[" + (x - offset) + ", " + (y + offset) + "]");
                }
                actual += " ";
            }
        }
        assertThat(actual).isEqualTo(expected);
    }