Counting test case failures

We have a total of 15 test cases of a Python program. From each test we run, we take note of the number of failures that it finds. So at the end we have a set of 15 natural numbers: From \(n_1\) to \(n_{15}\).

We are going to write a program that asks for these 15 natural numbers through the keyboard and determines:

• How many tests have not found any error, that is, 0.

• How many tests have found between 1 and 3 errors.

• How many have found more than 4 errors.

In the execution example below you can see how your program should handle negative numbers.

>>> %Run 
    Enter the number of bugs found by test 1: 3
    Enter the number of bugs found by test 2: 4
    Enter the number of bugs found by test 3: -5
    You cannot enter negative amounts.
    Enter the number of bugs found by test 3: 5
    Enter the number of bugs found by test 4: 6 
    Enter the number of bugs found by test 5: 7
    Enter the number of bugs found by test 6: 0
    Enter the number of bugs found by test 7: 0
    Enter the number of bugs found by test 8: 1
    Enter the number of bugs found by test 9: 2
    Enter the number of bugs found by test 10: 6
    Enter the number of bugs found by test 11: 1
    Enter the number of bugs found by test 12: 2
    Enter the number of bugs found by test 13: 0
    Enter the number of bugs found by test 14: 0
    Enter the number of bugs found by test 15: 2
    Number of tests that have found 0 errors:  4
    Number of tests that have found between 1 and 3 errors:  6
    Number of tests that have found more than 4 errors:  5

Categorising series of inputs, where the inputs are related to test
cases. Test cases can find errors!