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(groups = "unit") 128 public void testPresent() { 129 OptionalInt empty = OptionalInt.empty(); 130 OptionalInt present = OptionalInt.of(1); 131 132 // present 133 assertTrue(present.equals(present)); 134 assertFalse(present.equals(OptionalInt.of(0))); 135 assertTrue(present.equals(OptionalInt.of(1))); 136 assertFalse(present.equals(empty)); 137 assertTrue(Integer.hashCode(1) == present.hashCode()); 138 assertFalse(present.toString().isEmpty()); 139 assertTrue(-1 != present.toString().indexOf(Integer.toString(present.getAsInt()).toString())); 140 assertEquals(1, present.getAsInt()); 141 142 AtomicBoolean presentCheck = new AtomicBoolean(); 143 present.ifPresent(v -> presentCheck.set(true)); 144 assertTrue(presentCheck.get()); 145 presentCheck.set(false); 146 present.ifPresentOrElse(v -> presentCheck.set(true), () -> fail()); 147 assertTrue(presentCheck.get()); 148 149 try { 150 present.ifPresent(v -> { throw new ObscureException(); }); 151 fail(); 152 } catch (ObscureException expected) { 153 } catch (AssertionError e) { 154 throw e; 155 } catch (Throwable t) { 156 fail(); 157 } 158 try { 159 present.ifPresentOrElse(v -> { throw new ObscureException(); }, () -> fail()); 160 fail(); 161 } catch (ObscureException expected) { 162 } catch (AssertionError e) { 163 throw e; 164 } catch (Throwable t) { 165 fail(); 166 } 167 168 assertEquals(1, present.orElse(2)); 169 assertEquals(1, present.orElseGet(null)); 170 assertEquals(1, present.orElseGet(()-> 2)); 171 assertEquals(1, present.orElseGet(()-> 3)); 172 assertEquals(1, present.<RuntimeException>orElseThrow(null)); 173 assertEquals(1, present.<RuntimeException>orElseThrow(ObscureException::new)); 174 } 175 176 @Test(groups = "unit") 177 public void testStream() { 178 { 179 IntStream s = OptionalInt.empty().stream(); 180 assertFalse(s.isParallel()); 181 182 int[] es = s.toArray(); 183 assertEquals(es.length, 0); 184 } 185 186 { 187 IntStream s = OptionalInt.of(42).stream(); 188 assertFalse(s.isParallel()); 189 190 int[] es = OptionalInt.of(42).stream().toArray(); 191 assertEquals(es.length, 1); 192 assertEquals(es[0], 42); 193 } 194 } 195 196 private static class ObscureException extends RuntimeException { 197 198 } 199 }