public void testCase23(){
  byte rBytes[]={0};
  BigInteger aNumber=BigInteger.ZERO;
  BigInteger bNumber=BigInteger.ZERO;
  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());
}

public void testCase23 ( ) { byte rBytes [ ] = { 0 } ; BigInteger aNumber = BigInteger . ZERO ; BigInteger bNumber = BigInteger . ZERO ; 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 ( ) ) ; }
subtract zero from zero .
