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/* sort.java -- some checks for the sort() methods in the Collections class.
Copyright (C) 2006 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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.
*/
// Tags: JDK1.2
package gnu.testlet.java.util.Collections;
import gnu.testlet.TestHarness;
import gnu.testlet.Testlet;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
public class sort implements Testlet {
public void test(TestHarness harness)
{
testMethod1(harness);
testMethod2(harness);
}
public void testMethod1(TestHarness harness)
{
harness.checkPoint("(List)");
List list = new ArrayList();
// sort an empty list - presumably all that can go wrong is that the code
// throws some exception due to a coding error...
boolean pass = true;
try
{
Collections.sort(list);
}
catch (Exception e)
{
pass = false;
}
harness.check(pass);
// sort a list containing just one item
list = new ArrayList();
list.add("A");
Collections.sort(list);
harness.check(list.size(), 1);
harness.check(list.get(0), "A");
// sort a list containing two items
list = new ArrayList();
list.add("B");
list.add("A");
Collections.sort(list);
harness.check(list.size(), 2);
harness.check(list.get(0), "A");
harness.check(list.get(1), "B");
// sort a list containing three items
list = new ArrayList();
list.add("B");
list.add("A");
list.add("C");
Collections.sort(list);
harness.check(list.size(), 3);
harness.check(list.get(0), "A");
harness.check(list.get(1), "B");
harness.check(list.get(2), "C");
// sort a list with a null in it
pass = false;
try
{
list = new ArrayList();
list.add("B");
list.add("A");
list.add(null);
Collections.sort(list);
}
catch (NullPointerException e)
{
pass = true;
}
harness.check(pass);
// check that equal items don't change order
Object obj1 = new Integer(9500);
Object obj2 = new Integer(9600);
Object obj3 = new Integer(9500);
Object obj4 = new Integer(9600);
list = new ArrayList();
list.add(obj1);
list.add(obj2);
list.add(obj3);
list.add(obj4);
Collections.sort(list);
harness.check(list.size(), 4);
harness.check(list.get(0), obj1);
harness.check(list.get(1), obj3);
harness.check(list.get(2), obj2);
harness.check(list.get(3), obj4);
// try a null argument
pass = false;
try
{
Collections.sort(null);
}
catch (NullPointerException e)
{
pass = true;
}
harness.check(pass);
}
static class MyComparator implements Comparator
{
public int compare(Object obj0, Object obj1) {
Comparable c0 = (Comparable) obj0;
Comparable c1 = (Comparable) obj1;
return -c0.compareTo(c1);
}
}
public void testMethod2(TestHarness harness)
{
harness.checkPoint("(List, Comparator)");
List list = new ArrayList();
Comparator comparator = new MyComparator();
// sort an empty list - presumably all that can go wrong is that the code
// throws some exception due to a coding error...
boolean pass = true;
try
{
Collections.sort(list, comparator);
}
catch (Exception e)
{
pass = false;
}
harness.check(pass);
// sort a list containing just one item
list = new ArrayList();
list.add("A");
Collections.sort(list, comparator);
harness.check(list.size(), 1);
harness.check(list.get(0), "A");
// sort a list containing two items
list = new ArrayList();
list.add("B");
list.add("A");
Collections.sort(list, comparator);
harness.check(list.size(), 2);
harness.check(list.get(0), "B");
harness.check(list.get(1), "A");
// sort a list containing three items
list = new ArrayList();
list.add("B");
list.add("A");
list.add("C");
Collections.sort(list, comparator);
harness.check(list.size(), 3);
harness.check(list.get(0), "C");
harness.check(list.get(1), "B");
harness.check(list.get(2), "A");
// sort a list with a null in it
pass = false;
try
{
list = new ArrayList();
list.add("B");
list.add("A");
list.add(null);
Collections.sort(list, comparator);
}
catch (NullPointerException e)
{
pass = true;
}
harness.check(pass);
// check that equal items don't change order
Object obj1 = new Integer(9500);
Object obj2 = new Integer(9600);
Object obj3 = new Integer(9500);
Object obj4 = new Integer(9600);
list = new ArrayList();
list.add(obj1);
list.add(obj2);
list.add(obj3);
list.add(obj4);
Collections.sort(list, comparator);
harness.check(list.size(), 4);
harness.check(list.get(0), obj2);
harness.check(list.get(1), obj4);
harness.check(list.get(2), obj1);
harness.check(list.get(3), obj3);
// try a null argument 1
pass = false;
try
{
Collections.sort(null, comparator);
}
catch (NullPointerException e)
{
pass = true;
}
harness.check(pass);
// try a null argument 2
pass = true;
try
{
Collections.sort(new ArrayList(), null);
}
catch (NullPointerException e)
{
pass = false;
}
harness.check(pass);
}
}
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