Test Case Creation

Write “Enter the price in dollars:” 

Input Price 

Write “Enter state sales tax(e.g. .06) :”

Input SalesTax 

Set Price = Price + (Price * SalesTax) 

Write “Price with Tax is” + Price

Testcase	Input	Expected Output
1	Enter the price in dollars = 200Enter state sales tax= 0.24	Price with Tax is = 248
2	Enter the price in dollars = 200Enter state sales tax = -2.4	Price with Tax is = “state sales tax should be a positive number”
3	Enter the price in dollars = -200Enter state sales tax = 0.24	Price with Tax is = “price in dollars should be a positive number”
4	Enter the price in dollars = 200Enter state sales tax = c	Price with Tax is = “state sales tax should be a positive number”
5	Enter the price in dollars = xEnter state sales tax = 0.4	Price with Tax is = “price in dollars should be a positive number”

Test case 1

The program output gives the expected result because Enter the price in dollars and state sales tax are integers.

Test case 2

The expected result is not achieved because the program output is wrong since tax must be a positive number. 

Test case 3

The expected result is not achieved because the program output is wrong price cannot be negative. 

Test case 4

The expected result is not achieved because the program output is wrong since tax must be a positive number. 

Test case 5

The expected result is not achieved because the program output is wrong since price must be a positive number. 

From the results, it is evident that the psudocaode’s algorithm is invalid because it does not detect negative numbers and non-numbers. Hence, it can not alert the user of invalid input but instead give a wrong output.