public void testZeroOne(){
  BigInteger aNumber=BigInteger.ZERO;
  BigInteger bNumber=BigInteger.ONE;
  BigInteger result=aNumber.and(bNumber);
  assertTrue(result.equals(BigInteger.ZERO));
  assertEquals("incorrect sign",0,result.signum());
}

public void testZeroOne ( ) { BigInteger aNumber = BigInteger . ZERO ; BigInteger bNumber = BigInteger . ONE ; BigInteger result = aNumber . and ( bNumber ) ; assertTrue ( result . equals ( BigInteger . ZERO ) ) ; assertEquals ( "incorrect sign" , 0 , result . signum ( ) ) ; }
and for zero and one
