question: public void testCase24 ( ) { byte rBytes [ ] = { 0 } ; BigInteger aNumber = BigInteger . ONE ; BigInteger bNumber = BigInteger . ONE ; BigInteger result = aNumber . subtract ( bNumber ) ; byte resBytes [ ] = new byte [ rBytes . length ] ; resBytes = result . toByteArray ( ) ; for ( int i = 0 ; i < resBytes . length ; i ++ ) { assertTrue ( resBytes [ i ] == rBytes [ i ] ) ; } assertEquals ( 0 , result . signum ( ) ) ; }
target:  Subtract ONE from ONE.