JUnit theory for hashCode/equals contract

Question

The following class serve as generic tester for equals/hashCode contract. It is a part of a home grown testing framework.

• What do you think about?
• Ho

Answer 1

Maybe I'm missing something, but the equalsIsSymmetric test is in fact only correctly tested if you have to DataPoints which have the same values (e.g. String a = "a"; String a2 = "a";) Otherwise this test is only done when the 2 parameters are one instance (i.e. equalsIsSymmetric(a, a);). In fact you test again if equals obey the 'reflective' requirement instead of the symmetric requirement.