public void WillSortAscendingWithSix()
        {
            // arrange
            var sut           = new Calculator();
            var input         = new int[] { 6, 4, 3, 2, 1 };
            var expectedArray = new int[] { 1, 2, 3, 4, 6 };
            // act
            var result = sut.BubbleSort(input);


            // assert

            Assert.Equal(expectedArray, result);
        }