SingleElementListIteratorTests.java

/*******************************************************************************
 * Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
 * which accompanies this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *     Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.tools.workbench.test.utility.iterators;

import java.util.Iterator;
import java.util.ListIterator;

import junit.framework.Test;
import junit.framework.TestSuite;

import org.eclipse.persistence.tools.workbench.utility.iterators.SingleElementListIterator;

public class SingleElementListIteratorTests extends SingleElementIteratorTests {

    public static Test suite() {
        return new TestSuite(SingleElementListIteratorTests.class);
    }

    public SingleElementListIteratorTests(String name) {
        super(name);
    }

    public void testNextIndex() {
        ListIterator stream = this.buildSingleElementListIterator();
        while (stream.hasNext()) {
            assertEquals("bogus index", 0, stream.nextIndex());
            stream.next();
        }
        assertEquals("bogus index", 1, stream.nextIndex());
    }

    public void testHasPrevious() {
        int i = 0;
        ListIterator stream = this.buildSingleElementListIterator();
        while (stream.hasNext()) {
            stream.next();
            i++;
        }
        assertEquals(1, i);

        while (stream.hasPrevious()) {
            stream.previous();
            i++;
        }
        assertEquals(2, i);
    }

    public void testPrevious() {
        ListIterator stream = this.buildSingleElementListIterator();

        while (stream.hasNext()) {
            assertEquals("bogus element", this.singleElement(), stream.next());
        }

        while (stream.hasPrevious()) {
            assertEquals("bogus element", this.singleElement(), stream.previous());
        }
    }

    public void testPreviousIndex() {
        ListIterator stream = this.buildSingleElementListIterator();

        while (stream.hasNext()) {
            assertEquals("bogus index", 0, stream.nextIndex());
            stream.next();
        }

        while (stream.hasPrevious()) {
            assertEquals("bogus index", 0, stream.previousIndex());
            stream.previous();
        }

        assertEquals("bogus index", -1, stream.previousIndex());
    }

    public void testAdd() {
        boolean exCaught = false;
        ListIterator stream = this.buildSingleElementListIterator();

        try {
            stream.add(new Object());
        } catch (UnsupportedOperationException ex) {
            exCaught = true;
        }

        assertTrue("UnsupportedOperationException not thrown", exCaught);
    }

    public void testSet() {
        boolean exCaught = false;
        for (ListIterator stream = this.buildSingleElementListIterator(); stream.hasNext(); ) {
            if (stream.next().equals(this.singleElement())) {
                try {
                    stream.set(new Object());
                } catch (UnsupportedOperationException ex) {
                    exCaught = true;
                }
            }
        }
        assertTrue("UnsupportedOperationException not thrown", exCaught);
    }

    protected Iterator buildSingleElementIterator() {
        return new SingleElementListIterator(this.singleElement());
    }

    protected ListIterator buildSingleElementListIterator() {
        return (ListIterator) this.buildSingleElementIterator();
    }

}