001    /*
002     * SonarQube, open source software quality management tool.
003     * Copyright (C) 2008-2014 SonarSource
004     * mailto:contact AT sonarsource DOT com
005     *
006     * SonarQube is free software; you can redistribute it and/or
007     * modify it under the terms of the GNU Lesser General Public
008     * License as published by the Free Software Foundation; either
009     * version 3 of the License, or (at your option) any later version.
010     *
011     * SonarQube is distributed in the hope that it will be useful,
012     * but WITHOUT ANY WARRANTY; without even the implied warranty of
013     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014     * Lesser General Public License for more details.
015     *
016     * You should have received a copy of the GNU Lesser General Public License
017     * along with this program; if not, write to the Free Software Foundation,
018     * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
019     */
020    package org.sonar.test;
021    
022    import org.apache.commons.io.FileUtils;
023    import org.apache.commons.lang.StringUtils;
024    
025    import java.io.File;
026    import java.lang.reflect.Constructor;
027    import java.lang.reflect.Modifier;
028    import java.net.URL;
029    
030    import static org.fest.assertions.Assertions.assertThat;
031    import static org.fest.assertions.Fail.fail;
032    
033    /**
034     * Utilities for unit tests
035     *
036     * @since 2.2
037     */
038    public final class TestUtils {
039    
040      private TestUtils() {
041      }
042    
043      /**
044       * Search for a test resource in the classpath. For example getResource("org/sonar/MyClass/foo.txt");
045       *
046       * @param path the starting slash is optional
047       * @return the resource. Null if resource not found
048       */
049      public static File getResource(String path) {
050        String resourcePath = path;
051        if (!resourcePath.startsWith("/")) {
052          resourcePath = "/" + resourcePath;
053        }
054        URL url = TestUtils.class.getResource(resourcePath);
055        if (url != null) {
056          return FileUtils.toFile(url);
057        }
058        return null;
059      }
060    
061      /**
062       * Search for a resource in the classpath. For example calling the method getResource(getClass(), "myTestName/foo.txt") from
063       * the class org.sonar.Foo loads the file $basedir/src/test/resources/org/sonar/Foo/myTestName/foo.txt
064       *
065       * @return the resource. Null if resource not found
066       */
067      public static File getResource(Class baseClass, String path) {
068        String resourcePath = StringUtils.replaceChars(baseClass.getCanonicalName(), '.', '/');
069        if (!path.startsWith("/")) {
070          resourcePath += "/";
071        }
072        resourcePath += path;
073        return getResource(resourcePath);
074      }
075    
076      public static void assertPrivateConstructor(Class clazz) {
077        try {
078          Constructor constructor = clazz.getDeclaredConstructor();
079          assertThat(Modifier.isPrivate(constructor.getModifiers())).isTrue();
080          constructor.setAccessible(true);
081          constructor.newInstance();
082        } catch (Exception e) {
083          fail("Fail to instantiate " + clazz, e);
084        }
085      }
086    }