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 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 += testHashCode(); 38 errors += testToString(); 39 errors += testCompare(); 40 errors += testNonNull(); 41 if (errors > 0 ) 42 throw new RuntimeException(); 43 } 44 45 private static int testEquals() { 46 int errors = 0; 47 Object[] values = {null, "42", 42}; 48 for(int i = 0; i < values.length; i++) 49 for(int j = 0; j < values.length; j++) { 50 boolean expected = (i == j); 51 Object a = values[i]; 52 Object b = values[j]; 53 boolean result = Objects.equals(a, b); 54 if (result != expected) { 55 errors++; 56 System.err.printf("When equating %s to %s, got %b instead of %b%n.", 57 a, b, result, expected); 58 } 59 } 60 return errors; 61 } 62 63 private static int testHashCode() { 64 int errors = 0; 65 errors += (Objects.hashCode(null) == 0 ) ? 0 : 1; 66 String s = "42"; 67 errors += (Objects.hashCode(s) == s.hashCode() ) ? 0 : 1; 68 return errors; 69 } 70 71 private static int testToString() { 72 int errors = 0; 73 errors += ("null".equals(Objects.toString(null)) ) ? 0 : 1; 74 String s = "Some string"; 75 errors += (s.equals(Objects.toString(s)) ) ? 0 : 1; 76 return errors; 77 } 78 79 private static int testCompare() { 80 int errors = 0; 81 String[] values = {"e. e. cummings", "zzz"}; 82 String[] VALUES = {"E. E. Cummings", "ZZZ"}; 83 errors += compareTest(null, null, 0); 84 for(int i = 0; i < values.length; i++) { 85 String a = values[i]; 86 errors += compareTest(a, a, 0); 87 for(int j = 0; j < VALUES.length; j++) { 88 int expected = Integer.compare(i, j); 89 String b = VALUES[j]; 90 errors += compareTest(a, b, expected); 91 } 92 } 93 return errors; 94 } 95 96 private static int compareTest(String a, String b, int expected) { 97 int errors = 0; 98 int result = Objects.compare(a, b, String.CASE_INSENSITIVE_ORDER); 99 if (Integer.signum(result) != Integer.signum(expected)) { 100 errors++; 101 System.err.printf("When comparing %s to %s, got %d instead of %d%n.", 102 a, b, result, expected); 103 } 104 return errors; 105 } 106 107 private static int testNonNull() { 108 int errors = 0; 109 String s; 110 111 // Test 1-arg variant 112 try { 113 s = Objects.nonNull("pants"); 114 if (s != "pants") { 115 System.err.printf("1-arg non-null failed to return its arg"); 116 errors++; 117 } 118 } catch (NullPointerException e) { 119 System.err.printf("1-arg nonNull threw unexpected NPE"); 120 errors++; 121 } 122 123 try { 124 s = Objects.nonNull(null); 125 System.err.printf("1-arg nonNull failed to throw NPE"); 126 errors++; 127 } catch (NullPointerException e) { 128 // Expected 129 } 130 131 // Test 2-arg variant 132 try { 133 s = Objects.nonNull("pants", "trousers"); 134 if (s != "pants") { 135 System.err.printf("2-arg nonNull failed to return its arg"); 136 errors++; 137 } 138 } catch (NullPointerException e) { 139 System.err.printf("2-arg nonNull threw unexpected NPE"); 140 errors++; 141 } 142 143 try { 144 s = Objects.nonNull(null, "pantaloons"); 145 System.err.printf("2-arg nonNull failed to throw NPE"); 146 errors++; 147 } catch (NullPointerException e) { 148 if (e.getMessage() != "pantaloons") { 149 System.err.printf("2-arg nonNull threw NPE w/ bad detail msg"); 150 errors++; 151 } 152 } 153 return errors; 154 } 155 }