/**

 * Back 2 Browser Bytecode Translator

 * Copyright (C) 2012 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.

 */

/*

 * To change this license header, choose License Headers in Project Properties.

 * To change this template file, choose Tools | Templates

 * and open the template in the editor.

 */

package org.apidesign.vm4brwsr;

import java.io.IOException;

import java.io.InputStream;

import static org.testng.Assert.*;

import org.testng.annotations.AfterClass;

import org.testng.annotations.BeforeClass;

import org.testng.annotations.Test;

/**

 *

 * @author Jaroslav Tulach <jtulach@netbeans.org>

 */

public class SizeOfAMethodTest {

    private static String code;

    @Test public void sumXYShouldBeSmall() {

        String s = code;

        int beg = s.indexOf("c.sum__III");

        int end = s.indexOf("c.sum__III.access");

        assertTrue(beg > 0, "Found sum method in " + code);

        assertTrue(beg < end, "Found end of sum method in " + code);

        String method = s.substring(beg, end);

        assertEquals(method.indexOf("st"), -1, "There should be no stack operations:\n" + method);

    }

    @Test public void betterConstructor() {

        String s = code;

        int beg = s.indexOf("c.initInflater__IIZ");

        int end = s.indexOf("c.initInflater__IIZ.access");

        assertTrue(beg > 0, "Found initInflater method in " + code);

        assertTrue(beg < end, "Found end of initInflater method in " + code);

        String method = s.substring(beg, end);

        assertEquals(method.indexOf("stA1"), -1, "No need for stA1 register:\n" + method);

    }

    @Test public void emptyConstructorRequiresNoStack() {

        String s = code;

        int beg = s.indexOf("CLS.cons__V");

        int end = s.indexOf("CLS.cons__V.access");

        assertTrue(beg > 0, "Found constructor in " + code);

        assertTrue(beg < end, "Found end of constructor in " + code);

        String method = s.substring(beg, end);

        method = method.replace("constructor", "CNSTR");

        assertEquals(method.indexOf("st"), -1, "There should be no stack operations:\n" + method);

        assertEquals(method.indexOf("for"), -1, "There should be no for blocks:\n" + method);

    }

    @Test public void dontGeneratePrimitiveFinalConstants() {

        assertEquals(code.indexOf("MISSING_CONSTANT"), -1, "MISSING_CONSTANT field should not be generated");

    }

    @BeforeClass 

    public static void compileTheCode() throws Exception {

        final String res = "org/apidesign/vm4brwsr/StaticMethod";

        StringBuilder sb = new StringBuilder();

        class JustStaticMethod implements Bck2Brwsr.Resources {

            @Override

            public InputStream get(String resource) throws IOException {

                final String cn = res + ".class";

                if (resource.equals(cn)) {

                    return getClass().getClassLoader().getResourceAsStream(cn);

                }

                return null;

            }

        }

        Bck2Brwsr.generate(sb, new JustStaticMethod(), res);

        code = sb.toString();

    }

    @AfterClass

    public static void releaseTheCode() {

        code = null;

    }

}