1 /* 2 * Copyright (c) 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 /* @test 25 * @summary Basic functional test of OptionalInt 26 * @author Mike Duigou 27 * @run testng BasicInt 28 */ 29 30 import java.util.NoSuchElementException; 31 import java.util.OptionalInt; 32 import java.util.concurrent.atomic.AtomicBoolean; 33 import java.util.stream.IntStream; 34 35 import static org.testng.Assert.*; 36 import org.testng.annotations.Test; 37 38 39 public class BasicInt { 40 41 @Test(groups = "unit") 42 public void testEmpty() { 43 OptionalInt empty = OptionalInt.empty(); 44 OptionalInt present = OptionalInt.of(1); 45 46 // empty 47 assertTrue(empty.equals(empty)); 48 assertTrue(empty.equals(OptionalInt.empty())); 49 assertTrue(!empty.equals(present)); 50 assertTrue(0 == empty.hashCode()); 51 assertTrue(!empty.toString().isEmpty()); 52 assertTrue(!empty.isPresent()); 53 54 empty.ifPresent(v -> { fail(); }); 55 56 AtomicBoolean emptyCheck = new AtomicBoolean(); 57 empty.ifPresentOrElse(v -> fail(), () -> emptyCheck.set(true)); 58 assertTrue(emptyCheck.get()); 59 60 try { 61 empty.ifPresentOrElse(v -> fail(), () -> { throw new ObscureException(); }); 62 fail(); 63 } catch (ObscureException expected) { 64 } catch (AssertionError e) { 65 throw e; 66 } catch (Throwable t) { 67 fail(); 68 } 69 70 assertEquals(2, empty.orElse(2)); 71 assertEquals(2, empty.orElseGet(()-> 2)); 72 } 73 74 @Test(groups = "unit") 75 public void testIfPresentAndOrElseAndNull() { 76 OptionalInt empty = OptionalInt.empty(); 77 OptionalInt present = OptionalInt.of(1); 78 79 // No NPE 80 present.ifPresentOrElse(v -> {}, null); 81 empty.ifPresent(null); 82 empty.ifPresentOrElse(null, () -> {}); 83 84 // NPE 85 try { 86 present.ifPresent(null); 87 fail(); 88 } catch (NullPointerException ex) {} 89 try { 90 present.ifPresentOrElse(null, () -> {}); 91 fail(); 92 } catch (NullPointerException ex) {} 93 try { 94 empty.ifPresentOrElse(v -> {}, null); 95 fail(); 96 } catch (NullPointerException ex) {} 97 } 98 99 @Test(expectedExceptions=NoSuchElementException.class) 100 public void testEmptyGet() { 101 OptionalInt empty = OptionalInt.empty(); 102 103 int got = empty.getAsInt(); 104 } 105 106 @Test(expectedExceptions=NullPointerException.class) 107 public void testEmptyOrElseGetNull() { 108 OptionalInt empty = OptionalInt.empty(); 109 110 int got = empty.orElseGet(null); 111 } 112 113 @Test(expectedExceptions=NullPointerException.class) 114 public void testEmptyOrElseThrowNull() throws Throwable { 115 OptionalInt empty = OptionalInt.empty(); 116 117 int got = empty.orElseThrow(null); 118 } 119 120 @Test(expectedExceptions=ObscureException.class) 121 public void testEmptyOrElseThrow() throws Exception { 122 OptionalInt empty = OptionalInt.empty(); 123 124 int got = empty.orElseThrow(ObscureException::new); 125 } 126 127 @Test(expectedExceptions=NoSuchElementException.class) 128 public void testEmptyOrElseThrowNoArg() throws Exception { 129 OptionalInt empty = OptionalInt.empty(); 130 131 int got = empty.orElseThrow(); 132 } 133 134 @Test(groups = "unit") 135 public void testPresent() { 136 OptionalInt empty = OptionalInt.empty(); 137 OptionalInt present = OptionalInt.of(1); 138 139 // present 140 assertTrue(present.equals(present)); 141 assertFalse(present.equals(OptionalInt.of(0))); 142 assertTrue(present.equals(OptionalInt.of(1))); 143 assertFalse(present.equals(empty)); 144 assertTrue(Integer.hashCode(1) == present.hashCode()); 145 assertFalse(present.toString().isEmpty()); 146 assertTrue(-1 != present.toString().indexOf(Integer.toString(present.getAsInt()).toString())); 147 assertTrue(-1 != present.toString().indexOf(Integer.toString(present.orElseThrow()).toString())); 148 assertEquals(1, present.getAsInt()); 149 assertEquals(1, present.orElseThrow()); 150 151 AtomicBoolean presentCheck = new AtomicBoolean(); 152 present.ifPresent(v -> presentCheck.set(true)); 153 assertTrue(presentCheck.get()); 154 presentCheck.set(false); 155 present.ifPresentOrElse(v -> presentCheck.set(true), () -> fail()); 156 assertTrue(presentCheck.get()); 157 158 try { 159 present.ifPresent(v -> { throw new ObscureException(); }); 160 fail(); 161 } catch (ObscureException expected) { 162 } catch (AssertionError e) { 163 throw e; 164 } catch (Throwable t) { 165 fail(); 166 } 167 try { 168 present.ifPresentOrElse(v -> { throw new ObscureException(); }, () -> fail()); 169 fail(); 170 } catch (ObscureException expected) { 171 } catch (AssertionError e) { 172 throw e; 173 } catch (Throwable t) { 174 fail(); 175 } 176 177 assertEquals(1, present.orElse(2)); 178 assertEquals(1, present.orElseGet(null)); 179 assertEquals(1, present.orElseGet(()-> 2)); 180 assertEquals(1, present.orElseGet(()-> 3)); 181 assertEquals(1, present.<RuntimeException>orElseThrow(null)); 182 assertEquals(1, present.<RuntimeException>orElseThrow(ObscureException::new)); 183 } 184 185 @Test(groups = "unit") 186 public void testStream() { 187 { 188 IntStream s = OptionalInt.empty().stream(); 189 assertFalse(s.isParallel()); 190 191 int[] es = s.toArray(); 192 assertEquals(es.length, 0); 193 } 194 195 { 196 IntStream s = OptionalInt.of(42).stream(); 197 assertFalse(s.isParallel()); 198 199 int[] es = OptionalInt.of(42).stream().toArray(); 200 assertEquals(es.length, 1); 201 assertEquals(es[0], 42); 202 } 203 } 204 205 private static class ObscureException extends RuntimeException { 206 207 } 208 }