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// Tags: JDK1.1
// Copyright (C) 2004 David Gilbert <david.gilbert@object-refinery.com>
// Mauve is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2, or (at your option)
// any later version.
// Mauve is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Mauve; see the file COPYING. If not, write to
// the Free Software Foundation, 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA. */
package gnu.testlet.java.math.BigInteger;
import gnu.testlet.TestHarness;
import gnu.testlet.Testlet;
import java.math.BigInteger;
/**
* Some checks for the multiply() method in the {@link BigInteger} class.
*/
public class multiply implements Testlet
{
/**
* Runs the test using the specified harness.
*
* @param harness the test harness (<code>null</code> not permitted).
*/
public void test(TestHarness harness)
{
// some really simple cases
BigInteger p1 = new BigInteger("1");
BigInteger p2 = new BigInteger("2");
BigInteger m1 = new BigInteger("-1");
BigInteger m2 = new BigInteger("-2");
harness.check(p1.multiply(p2).equals(p2));
harness.check(p1.multiply(m2).equals(m2));
harness.check(m1.multiply(p2).equals(m2));
harness.check(m1.multiply(m2).equals(p2));
// some bigger numbers
BigInteger bp1 = new BigInteger("12345678901234567890123456789012345678901234567890");
BigInteger bp2 = new BigInteger("987654321098765432198765");
BigInteger bm1 = new BigInteger("-12345678901234567890123456789012345678901234567890");
BigInteger bm2 = new BigInteger("-987654321098765432198765");
BigInteger resultp = new BigInteger("12193263113702179523715891618930089161893008916189178958987793067366655850");
BigInteger resultm = new BigInteger("-12193263113702179523715891618930089161893008916189178958987793067366655850");
harness.check(bp1.multiply(bp2).equals(resultp));
harness.check(bp1.multiply(bm2).equals(resultm));
harness.check(bm1.multiply(bp2).equals(resultm));
harness.check(bm1.multiply(bm2).equals(resultp));
// check null argument
boolean pass = false;
try
{
p1.multiply(null);
}
catch (NullPointerException e)
{
pass = true;
}
harness.check(pass);
}
}
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