question: public void testBitLengthPositive1 ( ) { byte aBytes [ ] = { 12 , 56 , 100 , - 2 , - 76 , 89 , 45 , 91 , 3 , - 15 , 35 , 26 , 3 , 91 } ; int aSign = 1 ; BigInteger aNumber = new BigInteger ( aSign , aBytes ) ; assertEquals ( 108 , aNumber . bitLength ( ) ) ; }
target:  bitLength() of a positive number.