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