Test case selection apparatus and computer readable medium

A non-transitory computer readable medium storing a test case selection program to select, from a plurality of test cases performed on a before-change program, an important test case being a test case to be performed on an after-change program, the test case selection program making a computer execute:

• a non-equivalence set extraction process to extract, from a target set list indicating one or more target sets each being a set of a before-change target function included in the before-change program, and an after-change target function being a function included in the after-change program, the function being corresponding to the before-change target function, but not being coincident with the before-change target function, a non-equivalence set being a target set that does not satisfy a condition that an output of the after-change target function is coincident with an output of the before-change target function when a same input is provided to both of the before-change target function and the after-change target function;
• and
• a test case selection process to select, from the plurality of test cases, a test case wherein a before-change target function included in the non-equivalence set is called, as the important test case.