public void BadSudoku_IsCorrect_ReturnsFalse()
        {
            bool expected = false;

            bool actual = badSudoku.IsCorrect();

            Assert.That(actual, Is.EqualTo(expected));
        }
        public void GoodSudoku_IsCorrect_ReturnsTrue()
        {
            bool expected = true;

            bool actual = goodSudoku.IsCorrect();

            Assert.That(actual, Is.EqualTo(expected));
        }