How to attach a DataPoint with a Theory?

Question

@DataPoints public static final Integer[] input1={1,2};
@Theory
@Test
public void test1(int input1){

}

@DataPoints public static final Integer[] input2={3,4};
@Theory
         


        

Answer 1

Some of the references I have seen talking about using tests for specific values and theories for verifying behavior. As an example, if you have a class that has methods to add and subtract from an attribute, a test would verify correctness of the result (e.g., 1+3 returns 4) whereas a theory might verify that, for the datapoint values (x1, y1), (x2, y2), x+y-y always equals x, x-y+y always equals x, x*y/y always equals x, etc. This way, the results of theories are not coupled as tightly with the data. With theories, you also can filter out cases such as y == 0; they don't count as failure. Bottom line: you can use both. A good paper is: http://web.archive.org/web/20110608210825/http://shareandenjoy.saff.net/tdd-specifications.pdf