1 /* 2 * Copyright (c) 2013, 2018, 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 * @bug 8195649 26 * @summary Basic functional test of OptionalInt 27 * @author Mike Duigou 28 * @build ObscureException 29 * @run testng BasicInt 30 */ 31 32 import java.util.NoSuchElementException; 33 import java.util.OptionalInt; 34 import java.util.concurrent.atomic.AtomicBoolean; 35 36 import static org.testng.Assert.*; 37 import org.testng.annotations.Test; 38 39 public class BasicInt { 40 41 static final int INTVAL = 33_550_336; 42 static final int UNEXPECTED = 0xCAFEBABE; 43 44 /** 45 * Checks a block of assertions over an empty OptionalInt. 46 */ 47 void checkEmpty(OptionalInt empty) { 48 assertTrue(empty.equals(OptionalInt.empty())); 49 assertTrue(OptionalInt.empty().equals(empty)); 50 assertFalse(empty.equals(OptionalInt.of(UNEXPECTED))); 51 assertFalse(OptionalInt.of(UNEXPECTED).equals(empty)); 52 assertFalse(empty.equals("unexpected")); 53 54 assertFalse(empty.isPresent()); 55 assertEquals(empty.hashCode(), 0); 56 assertEquals(empty.orElse(UNEXPECTED), UNEXPECTED); 57 assertEquals(empty.orElseGet(() -> UNEXPECTED), UNEXPECTED); 58 59 assertThrows(NoSuchElementException.class, () -> empty.getAsInt()); 60 assertThrows(NoSuchElementException.class, () -> empty.orElseThrow()); 61 assertThrows(ObscureException.class, () -> empty.orElseThrow(ObscureException::new)); 62 63 var b = new AtomicBoolean(); 64 empty.ifPresent(s -> b.set(true)); 65 assertFalse(b.get()); 66 67 var b1 = new AtomicBoolean(false); 68 var b2 = new AtomicBoolean(false); 69 empty.ifPresentOrElse(s -> b1.set(true), () -> b2.set(true)); 70 assertFalse(b1.get()); 71 assertTrue(b2.get()); 72 73 assertEquals(empty.toString(), "OptionalInt.empty"); 74 } 75 76 /** 77 * Checks a block of assertions over an OptionalInt that is expected to 78 * have a particular value present. 79 */ 80 void checkPresent(OptionalInt opt, int expected) { 81 assertFalse(opt.equals(OptionalInt.empty())); 82 assertFalse(OptionalInt.empty().equals(opt)); 83 assertTrue(opt.equals(OptionalInt.of(expected))); 84 assertTrue(OptionalInt.of(expected).equals(opt)); 85 assertFalse(opt.equals(OptionalInt.of(UNEXPECTED))); 86 assertFalse(OptionalInt.of(UNEXPECTED).equals(opt)); 87 assertFalse(opt.equals("unexpected")); 88 89 assertTrue(opt.isPresent()); 90 assertEquals(opt.hashCode(), Integer.hashCode(expected)); 91 assertEquals(opt.orElse(UNEXPECTED), expected); 92 assertEquals(opt.orElseGet(() -> UNEXPECTED), expected); 93 94 assertEquals(opt.getAsInt(), expected); 95 assertEquals(opt.orElseThrow(), expected); 96 assertEquals(opt.orElseThrow(ObscureException::new), expected); 97 98 var b = new AtomicBoolean(false); 99 opt.ifPresent(s -> b.set(true)); 100 assertTrue(b.get()); 101 102 var b1 = new AtomicBoolean(false); 103 var b2 = new AtomicBoolean(false); 104 opt.ifPresentOrElse(s -> b1.set(true), () -> b2.set(true)); 105 assertTrue(b1.get()); 106 assertFalse(b2.get()); 107 108 assertEquals(opt.toString(), "OptionalInt[" + expected + "]"); 109 } 110 111 @Test(groups = "unit") 112 public void testEmpty() { 113 checkEmpty(OptionalInt.empty()); 114 } 115 116 @Test(groups = "unit") 117 public void testPresent() { 118 checkPresent(OptionalInt.of(INTVAL), INTVAL); 119 } 120 121 @Test(groups = "unit") 122 public void testStreamEmpty() { 123 assertEquals(OptionalInt.empty().stream().toArray(), new int[] { }); 124 } 125 126 @Test(groups = "unit") 127 public void testStreamPresent() { 128 assertEquals(OptionalInt.of(INTVAL).stream().toArray(), new int[] { INTVAL }); 129 } 130 }