/**

  * 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(".access", beg);

         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(".access", beg);

         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 deepConstructor() {

         String s = code;

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

         int end = s.indexOf(".access", beg);

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

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

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

         assertEquals(method.indexOf("stA3"), -1, "No need for stA3 register on second constructor:\n" + method);

     }

     @Test public void emptyConstructorRequiresNoStack() {

         String s = code;

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

         int end = s.indexOf(".access", beg);

         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;

     }

 }