/**

 * 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.

 */

package org.apidesign.bck2brwsr.tck;

import java.io.IOException;

import java.io.InputStream;

import java.net.URL;

import java.util.Enumeration;

import org.apidesign.bck2brwsr.vmtest.Compare;

import org.apidesign.bck2brwsr.vmtest.VMTest;

import org.testng.annotations.Factory;

/**

 *

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

 */

public class ResourcesTest {

    @Compare public String allManifests() throws Exception {

        Enumeration<URL> en = ClassLoader.getSystemResources("META-INF/MANIFEST.MF");

        assert en.hasMoreElements() : "Should have at least one manifest";

        String first = readString(en.nextElement().openStream());

        boolean different = false;

        int cnt = 1;

        while (en.hasMoreElements()) {

            URL url = en.nextElement();

            String now = readString(url.openStream());

            if (!first.equals(now)) {

                different = true;

            }

            cnt++;

            if (cnt > 500) {

                throw new IllegalStateException(

                    "Giving up. First manifest:\n" + first + 

                    "\nLast manifest:\n" + now

                );

            }

        }

        assert different : "Not all manifests should look like first one:\n" + first;

        return "" + cnt;

    }

    @Compare public String readResourceAsStream() throws Exception {

        InputStream is = getClass().getResourceAsStream("Resources.txt");

        return readString(is);

    }

    @Compare public String readResourceViaConnection() throws Exception {

        InputStream is = getClass().getResource("Resources.txt").openConnection().getInputStream();

        return readString(is);

    }

    private String readString(InputStream is) throws IOException {

        StringBuilder sb = new StringBuilder();

        byte[] b = new byte[512];

        for (;;) { 

            int len = is.read(b);

            if (len == -1) {

                return sb.toString();

            }

            for (int i = 0; i < len; i++) {

                sb.append((char)b[i]);

            }

        }

    }

    @Compare public String readResourceAsStreamFromClassLoader() throws Exception {

        InputStream is = getClass().getClassLoader().getResourceAsStream("org/apidesign/bck2brwsr/tck/Resources.txt");

        return readString(is);

    }

    @Compare public String toURIFromURL() throws Exception {

        URL u = new URL("http://apidesign.org");

        return u.toURI().toString();

    }

    @Factory public static Object[] create() {

        return VMTest.create(ResourcesTest.class);

    }

}