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 /** 031 * Utilities for unit tests 032 * 033 * @since 2.2 034 */ 035 public final class TestUtils { 036 037 private TestUtils() { 038 } 039 040 /** 041 * Search for a test resource in the classpath. For example getResource("org/sonar/MyClass/foo.txt"); 042 * 043 * @param path the starting slash is optional 044 * @return the resource. Null if resource not found 045 */ 046 public static File getResource(String path) { 047 String resourcePath = path; 048 if (!resourcePath.startsWith("/")) { 049 resourcePath = "/" + resourcePath; 050 } 051 URL url = TestUtils.class.getResource(resourcePath); 052 if (url != null) { 053 return FileUtils.toFile(url); 054 } 055 return null; 056 } 057 058 /** 059 * Search for a resource in the classpath. For example calling the method getResource(getClass(), "myTestName/foo.txt") from 060 * the class org.sonar.Foo loads the file $basedir/src/test/resources/org/sonar/Foo/myTestName/foo.txt 061 * 062 * @return the resource. Null if resource not found 063 */ 064 public static File getResource(Class baseClass, String path) { 065 String resourcePath = StringUtils.replaceChars(baseClass.getCanonicalName(), '.', '/'); 066 if (!path.startsWith("/")) { 067 resourcePath += "/"; 068 } 069 resourcePath += path; 070 return getResource(resourcePath); 071 } 072 073 /** 074 * Asserts that all constructors are private, usually for helper classes with 075 * only static methods. If a constructor does not have any parameters, then 076 * it's instantiated. 077 */ 078 public static boolean hasOnlyPrivateConstructors(Class clazz) { 079 boolean ok = true; 080 for (Constructor constructor : clazz.getDeclaredConstructors()) { 081 ok &= Modifier.isPrivate(constructor.getModifiers()); 082 if (constructor.getParameterTypes().length == 0) { 083 constructor.setAccessible(true); 084 try { 085 constructor.newInstance(); 086 } catch (Exception e) { 087 throw new IllegalStateException(String.format("Fail to instantiate %s", clazz), e); 088 } 089 } 090 } 091 return ok; 092 } 093 }