/*
 * Copyright (C) 2009 Tomasz Grabiec
 *
 * This file is released under the GPL version 2 with the following
 * clarification and special exception:
 *
 *     Linking this library statically or dynamically with other modules is
 *     making a combined work based on this library. Thus, the terms and
 *     conditions of the GNU General Public License cover the whole
 *     combination.
 *
 *     As a special exception, the copyright holders of this library give you
 *     permission to link this library with independent modules to produce an
 *     executable, regardless of the license terms of these independent
 *     modules, and to copy and distribute the resulting executable under terms
 *     of your choice, provided that you also meet, for each linked independent
 *     module, the terms and conditions of the license of that module. An
 *     independent module is a module which is not derived from or based on
 *     this library. If you modify this library, you may extend this exception
 *     to your version of the library, but you are not obligated to do so. If
 *     you do not wish to do so, delete this exception statement from your
 *     version.
 *
 * Please refer to the file LICENSE for details.
 */
package jvm;

/**
 * @author Tomasz Grabiec
 */
public class ObjectCreationAndManipulationExceptionsTest extends TestCase {
    private static class X {
        public int field;
    }

    private static X getNullX() {
        return null;
    }

    public static void testGetfieldThrowsNullPointerException() {
        boolean caught = false;
        X test = getNullX();

        try {
            takeInt(test.field);
        } catch (NullPointerException e) {
            caught = true;
        }

        assertTrue(caught);
    }

    public static void testPutfieldThrowsNullPointerException() {
        boolean caught = false;
        X test = getNullX();

        try {
            test.field = 1;
        } catch (NullPointerException e) {
            caught = true;
        }

        assertTrue(caught);
    }

    public static void testCheckcastThrowsClassCastException() {
        boolean caught = false;
        Object o = null;
        String s = null;

        try {
            s = (String)o;
        } catch (ClassCastException e) {
            caught = true;
        }

        assertFalse(caught);

        o = new Object();

        try {
            s = (String)o;
        } catch (ClassCastException e) {
            caught = true;
        }

        assertTrue(caught);

        takeObject(s);
    }

    public static void main(String args[]) {
        testGetfieldThrowsNullPointerException();
        testPutfieldThrowsNullPointerException();
        testCheckcastThrowsClassCastException();
    }
}
