question: public void testCase9 ( ) { byte aBytes [ ] = { 1 , 2 , 3 , 4 , 5 , 6 , 7 , 1 , 2 , 3 , 1 , 2 , 3 , 4 , 5 } ; int aSign = 1 ; byte rBytes [ ] = { 1 , 2 , 3 , 4 , 5 , 6 , 7 , 1 , 2 , 3 , 1 , 2 , 3 , 4 , 5 } ; BigInteger aNumber = new BigInteger ( aSign , aBytes ) ; BigInteger bNumber = BigInteger . ONE ; BigInteger result = aNumber . multiply ( bNumber ) ; byte resBytes [ ] = new byte [ rBytes . length ] ; resBytes = result . toByteArray ( ) ; for ( int i = 0 ; i < resBytes . length ; i ++ ) { assertTrue ( resBytes [ i ] == rBytes [ i ] ) ; } assertEquals ( "incorrect sign" , 1 , result . signum ( ) ) ; }
target:  Multiply a positive number by ONE.