1 /*
2 * Copyright (c) 2009, 2013, 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
24 /*
25 * @test
26 * @bug 6797535 6889858 6891113 8013712 8011800 8014365
27 * @summary Basic tests for methods in java.util.Objects
28 * @author Joseph D. Darcy
29 */
30
31 import java.util.*;
32 import java.util.function.*;
33
34 public class BasicObjectsTest {
35 public static void main(String... args) {
36 int errors = 0;
37 errors += testEquals();
38 errors += testDeepEquals();
39 errors += testHashCode();
40 errors += testHash();
41 errors += testToString();
42 errors += testToString2();
43 errors += testCompare();
44 errors += testRequireNonNull();
45 errors += testIsNull();
46 errors += testNonNull();
47 if (errors > 0 )
48 throw new RuntimeException();
49 }
50
51 private static int testEquals() {
52 int errors = 0;
53 Object[] values = {null, "42", 42};
54 for(int i = 0; i < values.length; i++)
55 for(int j = 0; j < values.length; j++) {
56 boolean expected = (i == j);
57 Object a = values[i];
58 Object b = values[j];
59 boolean result = Objects.equals(a, b);
60 if (result != expected) {
61 errors++;
62 System.err.printf("When equating %s to %s, got %b instead of %b%n.",
63 a, b, result, expected);
64 }
65 }
66 return errors;
67 }
68
69 private static int testDeepEquals() {
70 int errors = 0;
71 Object[] values = {null,
72 null, // Change to values later
73 new byte[] {(byte)1},
74 new short[] {(short)1},
75 new int[] {1},
76 new long[] {1L},
77 new char[] {(char)1},
78 new float[] {1.0f},
79 new double[]{1.0d},
80 new String[]{"one"}};
81 values[1] = values;
82
83 for(int i = 0; i < values.length; i++)
84 for(int j = 0; j < values.length; j++) {
85 boolean expected = (i == j);
86 Object a = values[i];
87 Object b = values[j];
88 boolean result = Objects.deepEquals(a, b);
89 if (result != expected) {
90 errors++;
91 System.err.printf("When equating %s to %s, got %b instead of %b%n.",
92 a, b, result, expected);
93 }
94 }
95
96 return errors;
97 }
98
99 private static int testHashCode() {
100 int errors = 0;
101 errors += (Objects.hashCode(null) == 0 ) ? 0 : 1;
102 String s = "42";
103 errors += (Objects.hashCode(s) == s.hashCode() ) ? 0 : 1;
104 return errors;
105 }
106
107 private static int testHash() {
108 int errors = 0;
109
110 Object[] data = new String[]{"perfect", "ham", "THC"};
111
112 errors += ((Objects.hash((Object[])null) == 0) ? 0 : 1);
113
114 errors += (Objects.hash("perfect", "ham", "THC") ==
115 Arrays.hashCode(data)) ? 0 : 1;
116
117 return errors;
118 }
119
120 private static int testToString() {
121 int errors = 0;
122 errors += ("null".equals(Objects.toString(null)) ) ? 0 : 1;
123 String s = "Some string";
124 errors += (s.equals(Objects.toString(s)) ) ? 0 : 1;
125 return errors;
126 }
127
128 private static int testToString2() {
129 int errors = 0;
130 String s = "not the default";
131 errors += (s.equals(Objects.toString(null, s)) ) ? 0 : 1;
132 errors += (s.equals(Objects.toString(s, "another string")) ) ? 0 : 1;
133 return errors;
134 }
135
136 private static int testCompare() {
137 int errors = 0;
138 String[] values = {"e. e. cummings", "zzz"};
139 String[] VALUES = {"E. E. Cummings", "ZZZ"};
140 errors += compareTest(null, null, 0);
141 for(int i = 0; i < values.length; i++) {
142 String a = values[i];
143 errors += compareTest(a, a, 0);
144 for(int j = 0; j < VALUES.length; j++) {
145 int expected = Integer.compare(i, j);
146 String b = VALUES[j];
147 errors += compareTest(a, b, expected);
148 }
149 }
150 return errors;
151 }
152
153 private static int compareTest(String a, String b, int expected) {
154 int errors = 0;
155 int result = Objects.compare(a, b, String.CASE_INSENSITIVE_ORDER);
156 if (Integer.signum(result) != Integer.signum(expected)) {
157 errors++;
158 System.err.printf("When comparing %s to %s, got %d instead of %d%n.",
159 a, b, result, expected);
160 }
161 return errors;
162 }
163
164 private static int testRequireNonNull() {
165 int errors = 0;
166
167 final String RNN_1 = "1-arg requireNonNull";
168 final String RNN_2 = "2-arg requireNonNull";
169 final String RNN_3 = "Supplier requireNonNull";
170
171 Function<String, String> rnn1 = s -> Objects.requireNonNull(s);
172 Function<String, String> rnn2 = s -> Objects.requireNonNull(s, "trousers");
173 Function<String, String> rnn3 = s -> Objects.requireNonNull(s, () -> "trousers");
174
175 errors += testRNN_NonNull(rnn1, RNN_1);
176 errors += testRNN_NonNull(rnn2, RNN_2);
177 errors += testRNN_NonNull(rnn3, RNN_3);
178
179 errors += testRNN_Null(rnn1, RNN_1, null);
180 errors += testRNN_Null(rnn2, RNN_2, "trousers");
181 errors += testRNN_Null(rnn3, RNN_3, "trousers");
182 return errors;
183 }
184
185 private static int testRNN_NonNull(Function<String, String> testFunc,
186 String testFuncName) {
187 int errors = 0;
188 try {
189 String s = testFunc.apply("pants");
190 if (s != "pants") {
191 System.err.printf(testFuncName + " failed to return its arg");
192 errors++;
193 }
194 } catch (NullPointerException e) {
195 System.err.printf(testFuncName + " threw unexpected NPE");
196 errors++;
197 }
198 return errors;
199 }
200
201 private static int testRNN_Null(Function<String, String> testFunc,
202 String testFuncName,
203 String expectedMessage) {
204 int errors = 0;
205 try {
206 String s = testFunc.apply(null);
207 System.err.printf(testFuncName + " failed to throw NPE");
208 errors++;
209 } catch (NullPointerException e) {
210 if (e.getMessage() != expectedMessage) {
211 System.err.printf(testFuncName + " threw NPE w/ bad detail msg");
212 errors++;
213 }
214 }
215 return errors;
216 }
217
218 private static int testIsNull() {
219 int errors = 0;
220
221 errors += Objects.isNull(null) ? 0 : 1;
222 errors += Objects.isNull(Objects.class) ? 1 : 0;
223
224 return errors;
225 }
226
227 private static int testNonNull() {
228 int errors = 0;
229
230 errors += Objects.nonNull(null) ? 1 : 0;
231 errors += Objects.nonNull(Objects.class) ? 0 : 1;
232
233 return errors;
234 }
235 }