test/nashorn/src/jdk/nashorn/internal/runtime/test/AddAndRemoveOnListAdapterOutsideOfJavaScriptContextTest.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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package jdk.nashorn.internal.runtime.test;

import static org.testng.Assert.assertEquals;

import java.util.Arrays;
import java.util.Deque;
import java.util.List;
import javax.script.ScriptEngine;
import javax.script.ScriptException;
import jdk.nashorn.api.scripting.NashornScriptEngineFactory;
import org.testng.annotations.Test;

/**
 * @bug 8081204
 * @summary adding and removing elements to a ListAdapter outside of JS context should work.
 */
@SuppressWarnings("javadoc")
public class AddAndRemoveOnListAdapterOutsideOfJavaScriptContextTest {

    @SuppressWarnings("unchecked")
    private static <T> T getListAdapter() throws ScriptException {
        final ScriptEngine engine = new NashornScriptEngineFactory().getScriptEngine();
        return (T)engine.eval("Java.to([1, 2, 3, 4], 'java.util.List')");
    }

    @Test
    public void testInvokePush() throws ScriptException {
        final Deque<Object> l = getListAdapter();
        l.addLast(5);
        assertEquals(l.size(), 5);
        assertEquals(l.getLast(), 5);
        assertEquals(l.getFirst(), 1);
    }

    @Test
    public void testPop() throws ScriptException {
        final Deque<Object> l = getListAdapter();
        assertEquals(l.removeLast(), 4);
        assertEquals(l.size(), 3);
        assertEquals(l.getLast(), 3);
    }

    @Test
    public void testUnshift() throws ScriptException {
        final Deque<Object> l = getListAdapter();
        l.addFirst(0);
        assertEquals(l.getFirst(), 0);
        assertEquals(l.getLast(), 4);
        assertEquals(l.size(), 5);
    }

    @Test
    public void testShift() throws ScriptException {
        final Deque<Object> l = getListAdapter();
        l.removeFirst();
        assertEquals(l.getFirst(), 2);
        assertEquals(l.getLast(), 4);
        assertEquals(l.size(), 3);
    }

    @Test
    public void testSpliceAdd() throws ScriptException {
        final List<Object> l = getListAdapter();
        assertEquals(l, Arrays.asList(1, 2, 3, 4));
        l.add(2, "foo");
        assertEquals(l, Arrays.asList(1, 2, "foo", 3, 4));
    }


    @Test
    public void testSpliceRemove() throws ScriptException {
        final List<Object> l = getListAdapter();
        assertEquals(l, Arrays.asList(1, 2, 3, 4));
        l.remove(2);
        assertEquals(l, Arrays.asList(1, 2, 4));
    }
}