1 /*
2 * Copyright (C) 2019, Google LLC
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.lib;
44
45 /** Assertion methods. */
46 public class MoreAsserts {
47 /**
48 * Simple version of assertThrows that will be introduced in JUnit 4.13.
49 *
50 * @param expected
51 * Expected throwable class
52 * @param r
53 * Runnable that is expected to throw an exception.
54 * @return The thrown exception.
55 */
56 public static <T extends Throwable> T assertThrows(Class<T> expected,
57 ThrowingRunnable r) {
58 try {
59 r.run();
60 } catch (Throwable actual) {
61 if (expected.isAssignableFrom(actual.getClass())) {
62 @SuppressWarnings("unchecked")
63 T toReturn = (T) actual;
64 return toReturn;
65 }
66 throw new AssertionError("Expected " + expected.getSimpleName()
67 + ", but got " + actual.getClass().getSimpleName(), actual);
68 }
69 throw new AssertionError(
70 "Expected " + expected.getSimpleName() + " to be thrown");
71 }
72
73 public interface ThrowingRunnable {
74 void run() throws Throwable;
75 }
76
77 private MoreAsserts() {
78 }
79 }