1 /* 2 * Copyright 2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 */ 23 24 /* 25 * @test 26 * @bug 6797535 6889858 6891113 27 * @summary Basic tests for methods in java.util.Objects 28 * @author Joseph D. Darcy 29 */ 30 31 import java.util.*; 32 33 public class BasicObjectsTest { 34 public static void main(String... args) { 35 int errors = 0; 36 errors += testEquals(); 37 errors += testDeepEquals(); 38 errors += testHashCode(); 39 errors += testHash(); 40 errors += testToString(); 41 errors += testToString2(); 42 errors += testCompare(); 43 errors += testNonNull(); 44 if (errors > 0 ) 45 throw new RuntimeException(); 46 } 47 48 private static int testEquals() { 49 int errors = 0; 50 Object[] values = {null, "42", 42}; 51 for(int i = 0; i < values.length; i++) 52 for(int j = 0; j < values.length; j++) { 53 boolean expected = (i == j); 54 Object a = values[i]; 55 Object b = values[j]; 56 boolean result = Objects.equals(a, b); 57 if (result != expected) { 58 errors++; 59 System.err.printf("When equating %s to %s, got %b instead of %b%n.", 60 a, b, result, expected); 61 } 62 } 63 return errors; 64 } 65 66 private static int testDeepEquals() { 67 int errors = 0; 68 Object[] values = {null, 69 null, // Change to values later 70 new byte[] {(byte)1}, 71 new short[] {(short)1}, 72 new int[] {1}, 73 new long[] {1L}, 74 new char[] {(char)1}, 75 new float[] {1.0f}, 76 new double[]{1.0d}, 77 new String[]{"one"}}; 78 values[1] = values; 79 80 for(int i = 0; i < values.length; i++) 81 for(int j = 0; j < values.length; j++) { 82 boolean expected = (i == j); 83 Object a = values[i]; 84 Object b = values[j]; 85 boolean result = Objects.deepEquals(a, b); 86 if (result != expected) { 87 errors++; 88 System.err.printf("When equating %s to %s, got %b instead of %b%n.", 89 a, b, result, expected); 90 } 91 } 92 93 return errors; 94 } 95 96 private static int testHashCode() { 97 int errors = 0; 98 errors += (Objects.hashCode(null) == 0 ) ? 0 : 1; 99 String s = "42"; 100 errors += (Objects.hashCode(s) == s.hashCode() ) ? 0 : 1; 101 return errors; 102 } 103 104 private static int testHash() { 105 int errors = 0; 106 107 Object[] data = new String[]{"perfect", "ham", "THC"}; 108 109 errors += ((Objects.hash((Object[])null) == 0) ? 0 : 1); 110 111 errors += (Objects.hash("perfect", "ham", "THC") == 112 Arrays.hashCode(data)) ? 0 : 1; 113 114 return errors; 115 } 116 117 private static int testToString() { 118 int errors = 0; 119 errors += ("null".equals(Objects.toString(null)) ) ? 0 : 1; 120 String s = "Some string"; 121 errors += (s.equals(Objects.toString(s)) ) ? 0 : 1; 122 return errors; 123 } 124 125 private static int testToString2() { 126 int errors = 0; 127 String s = "not the default"; 128 errors += (s.equals(Objects.toString(null, s)) ) ? 0 : 1; 129 errors += (s.equals(Objects.toString(s, "another string")) ) ? 0 : 1; 130 return errors; 131 } 132 133 private static int testCompare() { 134 int errors = 0; 135 String[] values = {"e. e. cummings", "zzz"}; 136 String[] VALUES = {"E. E. Cummings", "ZZZ"}; 137 errors += compareTest(null, null, 0); 138 for(int i = 0; i < values.length; i++) { 139 String a = values[i]; 140 errors += compareTest(a, a, 0); 141 for(int j = 0; j < VALUES.length; j++) { 142 int expected = Integer.compare(i, j); 143 String b = VALUES[j]; 144 errors += compareTest(a, b, expected); 145 } 146 } 147 return errors; 148 } 149 150 private static int compareTest(String a, String b, int expected) { 151 int errors = 0; 152 int result = Objects.compare(a, b, String.CASE_INSENSITIVE_ORDER); 153 if (Integer.signum(result) != Integer.signum(expected)) { 154 errors++; 155 System.err.printf("When comparing %s to %s, got %d instead of %d%n.", 156 a, b, result, expected); 157 } 158 return errors; 159 } 160 161 private static int testNonNull() { 162 int errors = 0; 163 String s; 164 165 // Test 1-arg variant 166 try { 167 s = Objects.nonNull("pants"); 168 if (s != "pants") { 169 System.err.printf("1-arg non-null failed to return its arg"); 170 errors++; 171 } 172 } catch (NullPointerException e) { 173 System.err.printf("1-arg nonNull threw unexpected NPE"); 174 errors++; 175 } 176 177 try { 178 s = Objects.nonNull(null); 179 System.err.printf("1-arg nonNull failed to throw NPE"); 180 errors++; 181 } catch (NullPointerException e) { 182 // Expected 183 } 184 185 // Test 2-arg variant 186 try { 187 s = Objects.nonNull("pants", "trousers"); 188 if (s != "pants") { 189 System.err.printf("2-arg nonNull failed to return its arg"); 190 errors++; 191 } 192 } catch (NullPointerException e) { 193 System.err.printf("2-arg nonNull threw unexpected NPE"); 194 errors++; 195 } 196 197 try { 198 s = Objects.nonNull(null, "pantaloons"); 199 System.err.printf("2-arg nonNull failed to throw NPE"); 200 errors++; 201 } catch (NullPointerException e) { 202 if (e.getMessage() != "pantaloons") { 203 System.err.printf("2-arg nonNull threw NPE w/ bad detail msg"); 204 errors++; 205 } 206 } 207 return errors; 208 } 209 }