question: public void testEquals ( ) { int version = 1 ; int rounds = 5 ; int wordSize = 16 ; byte [ ] iv = { 1 , 2 , 3 , 4 , 5 , 6 } ; RC5ParameterSpec ps1 = new RC5ParameterSpec ( version , rounds , wordSize , iv ) ; RC5ParameterSpec ps2 = new RC5ParameterSpec ( version , rounds , wordSize , iv ) ; RC5ParameterSpec ps3 = new RC5ParameterSpec ( version , rounds , wordSize , new byte [ ] { 1 , 2 , 3 , 4 } ) ; assertTrue ( "The equivalence relation should be reflexive." , ps1 . equals ( ps1 ) ) ; assertTrue ( "Objects built on the same parameters should be equal." , ps1 . equals ( ps2 ) ) ; assertTrue ( "The equivalence relation should be symmetric." , ps2 . equals ( ps1 ) ) ; assertTrue ( "Objects built on the equal parameters should be equal." , ps2 . equals ( ps3 ) ) ; assertTrue ( "The equivalence relation should be transitive." , ps1 . equals ( ps3 ) ) ; assertFalse ( "Should return not be equal to null object." , ps1 . equals ( null ) ) ; ps2 = new RC5ParameterSpec ( version + 1 , rounds , wordSize , iv ) ; assertFalse ( "Objects should not be equal." , ps1 . equals ( ps2 ) ) ; ps2 = new RC5ParameterSpec ( version , rounds + 1 , wordSize , iv ) ; assertFalse ( "Objects should not be equal." , ps1 . equals ( ps2 ) ) ; ps2 = new RC5ParameterSpec ( version , rounds , wordSize / 2 , iv ) ; assertFalse ( "Objects should not be equal." , ps1 . equals ( ps2 ) ) ; ps2 = new RC5ParameterSpec ( version , rounds , wordSize , new byte [ ] { 4 , 3 , 2 , 1 } ) ; assertFalse ( "Objects should not be equal." , ps1 . equals ( ps2 ) ) ; }
target:  equals(Object obj) method testing. Tests the correctness of equal operation: it should be reflexive, symmetric, transitive, consistent and should be false on null object.