question: public void testHashCode ( ) { byte [ ] key = new byte [ ] { 1 , 2 , 3 , 4 , 5 } ; String algorithm = "Algorithm" ; SecretKeySpec ks1 = new SecretKeySpec ( key , algorithm ) ; SecretKeySpec ks2 = new SecretKeySpec ( key , algorithm ) ; assertTrue ( "Equal objects should have the same hash codes." , ks1 . hashCode ( ) == ks2 . hashCode ( ) ) ; }
target:  hashCode() method testing. Tests that for equal objects hash codes are equal.