/**

 * Back 2 Browser Bytecode Translator

 * Copyright (C) 2012-2015 Jaroslav Tulach <jaroslav.tulach@apidesign.org>

 *

 * This program is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, version 2 of the License.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program. Look for COPYING file in the top folder.

 * If not, see http://opensource.org/licenses/GPL-2.0.

 */

package org.apidesign.vm4brwsr;

import javax.script.ScriptEngine;

import javax.script.ScriptEngineManager;

import static org.testng.Assert.*;

import org.testng.annotations.Test;

/**

 *

 * @author Jaroslav Tulach

 */

public class StackMapperTest {

    public StackMapperTest() {

    }

    @Test public void replaceValueThatAnotherReplaceDependsOn()

    throws Exception {

        StringBuilder sb = new StringBuilder();

        StackMapper smapper = new StackMapper();

        smapper.assign(sb, VarType.INTEGER, "0");

        smapper.assign(sb, VarType.REFERENCE, "arr");

        smapper.assign(sb, VarType.INTEGER, "33");

        smapper.replace(sb, VarType.INTEGER, "@2[@1]", 

            smapper.popI(), smapper.getA(0)

        );

        smapper.replace(sb, VarType.INTEGER, "(@1) + (@2)", 

            smapper.getI(1), smapper.popI()

        );

        smapper.assign(sb, VarType.REFERENCE, "arr");

        smapper.assign(sb, VarType.INTEGER, "22");

        smapper.replace(sb, VarType.INTEGER, "@2[@1]", 

            smapper.popI(), smapper.getA(0)

        );

        smapper.replace(sb, VarType.INTEGER, "(@1) + (@2)", 

            smapper.getI(1), smapper.popI()

        );

        smapper.flush(sb);

        ScriptEngineManager sem = new ScriptEngineManager();

        ScriptEngine em = sem.getEngineByMimeType("text/javascript");

        Object ret = em.eval("var arr= []; arr[33] = 40; arr[22] = 2; " + sb + "; stI0;");

        assertTrue(ret instanceof Number, "Result is number: " + ret);

        assertEquals(((Number)ret).intValue(), 42, "Right value");

    }

}