//test to find an instance of the calculator test ($calculator != null, "An instance of the calculator exists"); //test to see if the calculator is set to zero test ($calculator->register == 0, "The calculator is set to zero"); //test to see if the calculator can reject too large a number test ($calculator->too_high (41) == "Error: number too large to calculate", "The calculator can reject numbers too high to calculate"); test ($calculator->too_high (40) == "Error: number too large to calculate", "The calculator can reject numbers too high to calculate"); //test to see if the calculator can return 40 test ($calculator->equals_fourty (40) == "XL", "The calculator can return the Roman number 40"); //test to see if the calculator can calculate the correct number of Xs test ($calculator->count_tens (30) == "XXX", "The calculator counts the correct number of tens 30"); test ($calculator->count_tens (20) == "XX", "The calculator counts the correct number of tens 20"); test ($calculator->count_tens (10) == "X", "The calculator counts the correct number of tens 10"); test ($calculator->count_tens (39) == "XXX", "The calculator counts the correct number of tens 39"); //test to see if calculator can return 9 test ($calculator->equals_nine (9) == "IX", "The calculator can return the Roman number 9"); //test to see if the calculator can return the correct number of Vs test ($calculator->count_fives (5) == "V", "The calculator counts the correct number of fives 5"); test ($calculator->count_fives (15) == "VVV", "The calculator counts the correct number of fives 15"); //test to see if calculator can return 4 test ($calculator->equals_four (4) == "IV", "The calculator can return the Roman number 4"); //test to see if the calculator can return the correct number of Is
