1 /*
2 * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23 package jdk.incubator.http.internal.hpack;
24
25 import org.testng.annotations.Test;
26
27 import java.util.Objects;
28 import java.util.Random;
29
30 public final class TestHelper {
31
32 public static Random newRandom() {
33 long seed = Long.getLong("jdk.test.lib.random.seed", System.currentTimeMillis());
34 System.out.println("new java.util.Random(" + seed + ")");
35 return new Random(seed);
36 }
37
38 public static <T extends Throwable> T assertVoidThrows(Class<T> clazz, Block<?> code) {
39 return assertThrows(clazz, () -> {
40 code.run();
41 return null;
42 });
43 }
44
45 public static <T extends Throwable> T assertThrows(Class<T> clazz, ReturningBlock<?> code) {
46 Objects.requireNonNull(clazz, "clazz == null");
47 Objects.requireNonNull(code, "code == null");
48 try {
49 code.run();
50 } catch (Throwable t) {
51 if (clazz.isInstance(t)) {
52 return clazz.cast(t);
53 }
54 throw new AssertionError("Expected to catch exception of type "
55 + clazz.getCanonicalName() + ", instead caught "
56 + t.getClass().getCanonicalName(), t);
57
58 }
59 throw new AssertionError(
60 "Expected to catch exception of type " + clazz.getCanonicalName()
61 + ", but caught nothing");
62 }
63
64 public static <T> T assertDoesNotThrow(ReturningBlock<T> code) {
65 Objects.requireNonNull(code, "code == null");
66 try {
67 return code.run();
68 } catch (Throwable t) {
69 throw new AssertionError(
70 "Expected code block to exit normally, instead " +
71 "caught " + t.getClass().getCanonicalName(), t);
72 }
73 }
74
75 public static void assertVoidDoesNotThrow(Block<?> code) {
76 Objects.requireNonNull(code, "code == null");
77 try {
78 code.run();
79 } catch (Throwable t) {
80 throw new AssertionError(
81 "Expected code block to exit normally, instead " +
82 "caught " + t.getClass().getCanonicalName(), t);
83 }
84 }
85
86
87 public static void assertExceptionMessageContains(Throwable t,
88 CharSequence firstSubsequence,
89 CharSequence... others) {
90 assertCharSequenceContains(t.getMessage(), firstSubsequence, others);
91 }
92
93 public static void assertCharSequenceContains(CharSequence s,
94 CharSequence firstSubsequence,
95 CharSequence... others) {
96 if (s == null) {
97 throw new NullPointerException("Exception message is null");
98 }
99 String str = s.toString();
100 String missing = null;
101 if (!str.contains(firstSubsequence.toString())) {
102 missing = firstSubsequence.toString();
103 } else {
104 for (CharSequence o : others) {
105 if (!str.contains(o.toString())) {
106 missing = o.toString();
107 break;
108 }
109 }
110 }
111 if (missing != null) {
112 throw new AssertionError("CharSequence '" + s + "'" + " does not "
113 + "contain subsequence '" + missing + "'");
114 }
115 }
116
117 public interface ReturningBlock<T> {
118 T run() throws Throwable;
119 }
120
121 public interface Block<T> {
122 void run() throws Throwable;
123 }
124
125 // tests
126
127 @Test
128 public void assertThrows() {
129 assertThrows(NullPointerException.class, () -> ((Object) null).toString());
130 }
131
132 @Test
133 public void assertThrowsWrongType() {
134 try {
135 assertThrows(IllegalArgumentException.class, () -> ((Object) null).toString());
136 } catch (AssertionError e) {
137 Throwable cause = e.getCause();
138 String message = e.getMessage();
139 if (cause != null
140 && cause instanceof NullPointerException
141 && message != null
142 && message.contains("instead caught")) {
143 return;
144 }
145 }
146 throw new AssertionError();
147 }
148
149 @Test
150 public void assertThrowsNoneCaught() {
151 try {
152 assertThrows(IllegalArgumentException.class, () -> null);
153 } catch (AssertionError e) {
154 Throwable cause = e.getCause();
155 String message = e.getMessage();
156 if (cause == null
157 && message != null
158 && message.contains("but caught nothing")) {
159 return;
160 }
161 }
162 throw new AssertionError();
163 }
164 }