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// Tags: JDK1.2
// Copyright (C) 2004 David Gilbert <david.gilbert@object-refinery.com>
// This file is part of Mauve.
// 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.util.Collections;
import gnu.testlet.TestHarness;
import gnu.testlet.Testlet;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInput;
import java.io.ObjectInputStream;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;
import java.util.Collections;
import java.util.List;
public class nCopies implements Testlet
{
public void test(TestHarness harness)
{
// try n = 0
List list = Collections.nCopies(0, "Y");
harness.check(list.isEmpty());
// try n > 0
list = Collections.nCopies(10, "X");
harness.check(list.size() == 10);
harness.check(list.get(0).equals("X"));
harness.check(list.get(9).equals("X"));
// try n < 0
boolean pass = false;
try
{
list = Collections.nCopies(-1, "X");
}
catch (IllegalArgumentException e)
{
pass = true;
}
harness.check(pass);
// try null object
list = Collections.nCopies(3, null);
harness.check(list.size() == 3);
harness.check(list.get(0) == null);
harness.check(list.get(1) == null);
harness.check(list.get(2) == null);
// confirm list is unmodifiable
list = Collections.nCopies(10, "Y");
pass = false;
try
{
list.add("Z");
}
catch (UnsupportedOperationException e)
{
pass = true;
}
harness.check(pass);
// the method should return a Serializable list
testSerialization(harness);
}
private void testSerialization(TestHarness harness)
{
List list1 = Collections.nCopies(99, "X");
List list2 = null;
try {
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
ObjectOutput out = new ObjectOutputStream(buffer);
out.writeObject(list1);
out.close();
ObjectInput in = new ObjectInputStream(
new ByteArrayInputStream(buffer.toByteArray())
);
list2 = (List) in.readObject();
in.close();
}
catch (Exception e) {
harness.debug(e);
}
harness.check(list1.equals(list2));
}
}
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