TestSingleContextContainment.java

package com.aperto.javascript;

import org.junit.Test;

import javax.script.Invocable;
import javax.script.ScriptContext;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;
import javax.script.SimpleScriptContext;

import static org.junit.Assert.assertEquals;

import jdk.nashorn.api.scripting.ScriptObjectMirror;

/**
 * Test whether we can use a single ScriptContext without Nashorn wrongly assuming Global boundary
 * crossing.
 * @author joerg.frantzius
 *
 */
public class TestSingleContextContainment {

    @Test
    public void testObjectCreateInFunctionFails() throws ScriptException {
        ScriptEngine engine = new ScriptEngineManager().getEngineByName("nashorn");
        SimpleScriptContext context = new SimpleScriptContext();
        context.setAttribute("f", engine.eval("(function () {Object.create(this)})", context), ScriptContext.ENGINE_SCOPE);
        engine.eval("f.call({})", context);
    }

    @Test
    public void testObjectCreateInFunctionSucceeds() throws ScriptException {
        ScriptEngine engine = new ScriptEngineManager().getEngineByName("nashorn");
        SimpleScriptContext context = new SimpleScriptContext();
        context.setAttribute("f", engine.eval("(function () {Object.create(this)})"), ScriptContext.ENGINE_SCOPE);
        engine.eval("f.call(f)", context);
    }

    @Test
    public void testJson() throws NoSuchMethodException, ScriptException {
        ScriptEngine engine = new ScriptEngineManager().getEngineByName("nashorn");
        ScriptContext globals = new SimpleScriptContext();
        ScriptObjectMirror jsonParse = (ScriptObjectMirror) engine.eval("JSON.parse", globals);
        ScriptObjectMirror jsonObject = (ScriptObjectMirror) jsonParse.call(jsonParse, "{\"foo\": \"bar\"}");

        ScriptObjectMirror f = (ScriptObjectMirror) engine.eval("(function () {return Object.create(this).foo})");

        assertEquals("bar", f.call(jsonObject));
    }

}