test/jdk/javax/swing/JComboBox/DefaultComboBoxModelAddAllElementsTest.java

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 * 2 along with this work; if not, write to the Free Software Foundation,
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/*
 * @test
 * @bug 4842658
 * @summary Tests the addAllElements, addAllElementsAt methods of DefaultComboBoxModel.
 * @run main DefaultComboBoxModelAddAllElementsTest
 */
import javax.swing.DefaultComboBoxModel;
import javax.swing.event.ListDataEvent;
import javax.swing.event.ListDataListener;
import java.util.ArrayList;
import java.util.TreeSet;
import java.util.Vector;
import java.util.stream.IntStream;


public class DefaultComboBoxModelAddAllElementsTest {
    private static final int START = 0;
    private static final int END = 50;
    private static final Vector<Integer> vector =
            IntStream.range(START, END).collect(Vector::new,
                                                Vector::add,
                                                Vector::addAll);

    private static final TreeSet<Integer> set =
            IntStream.range(START, END).collect(TreeSet::new,
                                                TreeSet::add,
                                                TreeSet::addAll);

    private static final ArrayList<Integer> arrayList =
            IntStream.range(START, END).collect(ArrayList::new,
                                                ArrayList::add,
                                                ArrayList::addAll);

    public static void main(String[] args) {
        checkAddAll();
        checkAddAllWithIndex();
        System.out.println("Test case passed.");
    }

    private static class MyListDataListener implements ListDataListener {
        @Override public void intervalAdded(ListDataEvent e) {
            if (e.getIndex1() - e.getIndex0() != END - START - 1) {
                throw new RuntimeException("Test case failed. Expected " + (END - START) +
                        " elements to be added, but only got " + (e.getIndex1() - e.getIndex0()));
            }
        }

        @Override public void intervalRemoved(ListDataEvent e) {}
        @Override public void contentsChanged(ListDataEvent e) {}
    }

    private static void checkAddAll() {
        DefaultComboBoxModel<Integer> cm = new DefaultComboBoxModel<>();
        cm.addListDataListener(new MyListDataListener());

        try {
            cm.addAll(arrayList);
            System.out.println("Successfully added " + (END - START) + "elements.");
        } catch (Exception e) {
            throw new RuntimeException("Test case failed. " + e.getMessage());
        }
    }

    private static void checkAddAllWithIndex() {
        DefaultComboBoxModel<Integer> cm = new DefaultComboBoxModel<>();

        cm.addListDataListener(new MyListDataListener());
        cm.addAll(set);

        try {
            cm.addAll(START - 1, vector);
            throw new RuntimeException("Test case failed. Expected failure not reported.");
        } catch (ArrayIndexOutOfBoundsException e){
            System.out.println("Encountered exception as expected, when trying to add elements" +
                    "before the start of the list.");
        }

        try {
            cm.addAll(15, vector);
            System.out.println("Successfully added elements at a particular index");
        } catch (Exception e) {
            throw new RuntimeException("Unexpected failure: " + e.getMessage());
        }

        try {
            cm.addAll(cm.getSize() + 1, vector);
            throw new RuntimeException("Test case failed. Expected failure not reported.");
        } catch (ArrayIndexOutOfBoundsException e){
            System.out.println("Encountered exception as expected, when trying to add elements" +
                    "after the end of the list.");
        }
    }
}