public void Method_divide_return_division_result_of_given_values()
        {
            // arrange
            var math = new Mathematics();

            // act
            var result = math.Divide(10, 5);

            // assert
            Assert.Equal(2, result);
        }
        public void Method_divide_return_division_result_of_positive_and_negative_numbers()
        {
            // arrange
            var math = new Mathematics();

            // act
            var result = math.Divide(10, -2);

            // assert
            Assert.Equal(-5, result);
        }