org.exnebula.bootstrap.BootConfigLocatorTest.java Source code

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Here is the source code for org.exnebula.bootstrap.BootConfigLocatorTest.java

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/*
 * Copyright (C) 2008-2013 - Thomas Santana <tms@exnebula.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, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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.  If not, see <http://www.gnu.org/licenses/>
 */
package org.exnebula.bootstrap;

import org.apache.commons.io.FileUtils;
import org.junit.FixMethodOrder;
import org.junit.Test;
import org.junit.runners.MethodSorters;

import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.net.URLDecoder;

import static org.junit.Assert.*;
import static org.junit.Assert.assertEquals;

@FixMethodOrder(MethodSorters.JVM)
public class BootConfigLocatorTest {

    @Test
    public void getFromClass() {
        File jar = getFileFromProtectionDomain(Test.class);
        String modifiedFileName = replaceExtension(jar.getName(), "pom");

        File result = BootConfigLocator.locateFile(Test.class, modifiedFileName);
        assertEquals(new File(jar.getParentFile(), modifiedFileName), result);
        assertTrue(result.isFile());
    }

    @Test
    public void getFromClassButNotInPath() {
        assertNull(BootConfigLocator.locateFile(Test.class, "not-found.file"));
    }

    @Test
    public void findFileFromSystemProperty() {
        System.setProperty(BootConfigLocator.JVM_CONFIG_OPTION, "./pom.xml");
        File result = BootConfigLocator.locateFile(Test.class, "pom.xml");
        assertEquals(new File(".", "pom.xml"), result);
    }

    @Test
    public void nullIfCannotFindFromSystemProperty() {
        System.setProperty(BootConfigLocator.JVM_CONFIG_OPTION, "./not-found.txt");
        File result = BootConfigLocator.locateFile(Test.class, "./not-found.txt");
        assertNull(result);
    }

    @Test
    public void findFromJarWithSpaceInProtectedDomain() throws IOException, ClassNotFoundException {
        File destFile = copyClassJarFileToDestination(Test.class, "target/with space/");
        Class<?> aClass = createClassLoaderAndLoadClass(destFile, "org.junit.rules.RuleChain");
        FileUtils.copyFile(new File("pom.xml"), new File("target/with space/boot.cfg"));

        File file = BootConfigLocator.locateFile(aClass, "boot.cfg");
        assertEquals(new File(getJarFileFromClass(aClass).getParent(), "boot.cfg"), file);
    }

    @Test
    public void ifProtectedDomainCodeSourceIsNotDefined_returnNull() {
        assertNull("String has code source", String.class.getProtectionDomain().getCodeSource());
        BootConfigLocator.locateFile(String.class, "rt.jar");
    }

    @Test
    public void findPropertyFirst() {
        File jar = getFileFromProtectionDomain(Test.class);
        System.setProperty(BootConfigLocator.JVM_CONFIG_OPTION, "./pom.xml");

        String modifiedFileName = replaceExtension(jar.getName(), "pom");

        File result = BootConfigLocator.locateFile(Test.class, modifiedFileName);
        System.clearProperty(BootConfigLocator.JVM_CONFIG_OPTION);
        assertEquals(new File(".", "pom.xml"), result);
    }

    private File getFileFromProtectionDomain(Class<?> targetClass) {
        return new File(targetClass.getProtectionDomain().getCodeSource().getLocation().getFile());
    }

    private String replaceExtension(String original, String newExtension) {
        return original.substring(0, original.lastIndexOf('.') + 1) + newExtension;
    }

    private Class<?> createClassLoaderAndLoadClass(File jarFile, String classToLoad)
            throws MalformedURLException, ClassNotFoundException {
        URL[] urls = { jarFile.toURI().toURL() };
        URLClassLoader classLoader = new URLClassLoader(urls, null);
        return classLoader.loadClass(classToLoad);
    }

    private File copyClassJarFileToDestination(Class<Test> aClass, String target) throws IOException {
        File srcFile = getJarFileFromClass(aClass);
        File destFile = new File(target, srcFile.getName());
        FileUtils.copyFile(srcFile, destFile);
        assertTrue(destFile + " was note copied", destFile.exists());
        return destFile;
    }

    private File getJarFileFromClass(Class<?> aClass) throws UnsupportedEncodingException {
        return new File(
                URLDecoder.decode(aClass.getProtectionDomain().getCodeSource().getLocation().getFile(), "UTF-8"));
    }

}