DESCRIPTION

Program Under Test

Consider a program which splits an input list of integers into two lists of integers as output according

to the following specifications:

$$ For the input list, the program is expected to accept a non$-$empty list of not more than $30$

integers within the ranges of $[-100,100],$ where integer $0$ is regarded to be negative in this

assignment. The input list may contain duplicated integers $($that is$,$ the same integer may

appear more than once in the input list$).$

$$ For the output lists, one of them contains only positive integers in ascending order without

duplication of integers, and the other list contains only negative integers in ascending order

without duplication of integers. Note that one of the output lists may be an empty list for

some inputs.

For example, suppose that the input list is $[10,-9,15,7,10,-5,28].$ This list contains $7$ elements

which are all within the range of $[-100,100]$ with some integers like $10$ appearing more than once

in the list. This is a valid test case. Its relevant outputs are two lists, one of which is $[-9,-5]($only

negative integers, in ascending order without duplication$),$ and the other list is $[7,10,15,28]($only

positive integers, in ascending order without duplication. Since the input is restricted to contain no

more than $30$ integers whose values are within the range of $[-100,100],$ the computed outputs can

be easily validated in a manual approach, and hence you can assume that this program has no test

oracle problem.

A program$-$under$-$test is given in either Python or Ruby in the Appendix.

Assignment Requirement

In this assignment, you are required to do the followings:

A$.$ TASKS

Task $1$: You are required to construct six valid concrete test cases for this program, which serve

for different testing purposes or objectives. Valid test cases are non$-$empty lists of integers with

not more than $30$ elements, where some elements could be duplicated and integer $0$ is regarded

as negative in this assignment.

$2$

Apart from explicitly describing your concrete test cases, you must describe and justify their

purposes, and explicitly describe their relevant outputs. For example, for the test case $[13,7,$

$9,15].$ Its outputs should be two lists, the $[7,9,13,15]$ and the empty list denoted by $[].$ This

test case serves to test the scenario that the output list of negative integers is empty.

Task $2$: Suppose that due to testing resources, you cannot test the program with all your six test

cases constructed above. You can only afford to test your program with one and only one test

case. What will be your choice of this single test case among the $6$ test cases proposed by you

in Task $1?$ Explain and justify your choice.

Task $3$: Conduct the testing with any one of two programs given in the Appendix with all your

test cases in Task $1.$ Note that the program may contain bugs. Report the individual test cases

and the results, discuss the insights of test outcome including the suggestion to improve the

program under test from the test finding.