public void testCase22(){
  byte bBytes[]={120,34,78,-23,-111,45,127,23,45,-3};
  byte rBytes[]={120,34,78,-23,-111,45,127,23,45,-3};
  int bSign=-1;
  BigInteger aNumber=BigInteger.ZERO;
  BigInteger bNumber=new BigInteger(bSign,bBytes);
  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(1,result.signum());
}

public void testCase22 ( ) { byte bBytes [ ] = { 120 , 34 , 78 , - 23 , - 111 , 45 , 127 , 23 , 45 , - 3 } ; byte rBytes [ ] = { 120 , 34 , 78 , - 23 , - 111 , 45 , 127 , 23 , 45 , - 3 } ; int bSign = - 1 ; BigInteger aNumber = BigInteger . ZERO ; BigInteger bNumber = new BigInteger ( bSign , bBytes ) ; 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 ( 1 , result . signum ( ) ) ; }
subtract a number from zero . the number is negative .
