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// Tags: JDK1.1
// Copyright (C) 2002 Free Software Foundation, Inc.
// Written by Mark Wielaard (mark@klomp.org)
//
// 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.lang.System;
import gnu.testlet.Testlet;
import gnu.testlet.TestHarness;
public class identityHashCode implements Testlet
{
public int hashCode()
{
return 42;
}
private int origHashCode()
{
return super.hashCode();
}
public void test (TestHarness harness)
{
// Returns the same as hash code for any object that does not override it.
Object o = new Object();
harness.check(System.identityHashCode(o), o.hashCode());
// Exception also does not override hashCode
o = new Exception();
harness.check(System.identityHashCode(o), o.hashCode());
// When a class overrides it you can still get the original
identityHashCode ihc = new identityHashCode();
harness.check(System.identityHashCode(ihc), ihc.origHashCode());
// null has identityHashCode zero
harness.check(System.identityHashCode(null), 0);
}
}
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