1 /*
2 * Copyright (C) 2019 Nail Samatov <sanail@yandex.ru>
3 * and other copyright owners as documented in the project's IP log.
4 *
5 * This program and the accompanying materials are made available
6 * under the terms of the Eclipse Distribution License v1.0 which
7 * accompanies this distribution, is reproduced below, and is
8 * available at http://www.eclipse.org/org/documents/edl-v10.php
9 *
10 * All rights reserved.
11 *
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
14 * conditions are met:
15 *
16 * - Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 *
19 * - Redistributions in binary form must reproduce the above
20 * copyright notice, this list of conditions and the following
21 * disclaimer in the documentation and/or other materials provided
22 * with the distribution.
23 *
24 * - Neither the name of the Eclipse Foundation, Inc. nor the
25 * names of its contributors may be used to endorse or promote
26 * products derived from this software without specific prior
27 * written permission.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
30 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
31 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
32 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
33 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
34 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
35 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
36 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
37 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
38 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
40 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
41 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
42 */
43 package org.eclipse.jgit.junit;
44
45 import static java.lang.ClassLoader.getSystemClassLoader;
46
47 import java.net.URL;
48 import java.net.URLClassLoader;
49
50 import org.junit.runners.BlockJUnit4ClassRunner;
51 import org.junit.runners.model.InitializationError;
52
53 /**
54 * This class is used when it's required to load jgit classes in separate
55 * classloader for each test class. It can be needed to isolate static field
56 * initialization between separate tests.
57 */
58 public class SeparateClassloaderTestRunner extends BlockJUnit4ClassRunner {
59
60 /**
61 * Creates a SeparateClassloaderTestRunner to run {@code klass}.
62 *
63 * @param klass
64 * test class to run.
65 * @throws InitializationError
66 * if the test class is malformed or can't be found.
67 */
68 public SeparateClassloaderTestRunner(Class<?> klass)
69 throws InitializationError {
70 super(loadNewClass(klass));
71 }
72
73 private static Class<?> loadNewClass(Class<?> klass)
74 throws InitializationError {
75 try {
76 URL[] urls = ((URLClassLoader) getSystemClassLoader()).getURLs();
77 ClassLoader testClassLoader = new URLClassLoader(urls) {
78
79 @Override
80 public Class<?> loadClass(String name)
81 throws ClassNotFoundException {
82 if (name.startsWith("org.eclipse.jgit.")) {
83 return super.findClass(name);
84 }
85
86 return super.loadClass(name);
87 }
88 };
89 return Class.forName(klass.getName(), true, testClassLoader);
90 } catch (ClassNotFoundException e) {
91 throw new InitializationError(e);
92 }
93 }
94 }