1 /*
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   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   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.
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   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  *
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  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
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  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.stream.IntStream;
  33 
  34 import static org.testng.Assert.*;
  35 import org.testng.annotations.Test;
  36 
  37 
  38 public class BasicInt {
  39 
  40     @Test(groups = "unit")
  41     public void testEmpty() {
  42         OptionalInt empty = OptionalInt.empty();
  43         OptionalInt present = OptionalInt.of(1);
  44 
  45         // empty
  46         assertTrue(empty.equals(empty));
  47         assertTrue(empty.equals(OptionalInt.empty()));
  48         assertTrue(!empty.equals(present));
  49         assertTrue(0 == empty.hashCode());
  50         assertTrue(!empty.toString().isEmpty());
  51         assertTrue(!empty.isPresent());
  52         empty.ifPresent(v -> { fail(); });
  53         assertEquals(2, empty.orElse(2));
  54         assertEquals(2, empty.orElseGet(()-> 2));
  55     }
  56 
  57     @Test(expectedExceptions=NoSuchElementException.class)
  58     public void testEmptyGet() {
  59         OptionalInt empty = OptionalInt.empty();
  60 
  61         int got = empty.getAsInt();
  62     }
  63 
  64     @Test(expectedExceptions=NullPointerException.class)
  65     public void testEmptyOrElseGetNull() {
  66         OptionalInt empty = OptionalInt.empty();
  67 
  68         int got = empty.orElseGet(null);
  69     }
  70 
  71     @Test(expectedExceptions=NullPointerException.class)
  72     public void testEmptyOrElseThrowNull() throws Throwable {
  73         OptionalInt empty = OptionalInt.empty();
  74 
  75         int got = empty.orElseThrow(null);
  76     }
  77 
  78     @Test(expectedExceptions=ObscureException.class)
  79     public void testEmptyOrElseThrow() throws Exception {
  80         OptionalInt empty = OptionalInt.empty();
  81 
  82         int got = empty.orElseThrow(ObscureException::new);
  83     }
  84 
  85     @Test(groups = "unit")
  86     public void testPresent() {
  87         OptionalInt empty = OptionalInt.empty();
  88         OptionalInt present = OptionalInt.of(1);
  89 
  90         // present
  91         assertTrue(present.equals(present));
  92         assertFalse(present.equals(OptionalInt.of(0)));
  93         assertTrue(present.equals(OptionalInt.of(1)));
  94         assertFalse(present.equals(empty));
  95         assertTrue(Integer.hashCode(1) == present.hashCode());
  96         assertFalse(present.toString().isEmpty());
  97         assertTrue(-1 != present.toString().indexOf(Integer.toString(present.getAsInt()).toString()));
  98         assertEquals(1, present.getAsInt());
  99         try {
 100             present.ifPresent(v -> { throw new ObscureException(); });
 101             fail();
 102         } catch(ObscureException expected) {
 103 
 104         }
 105         assertEquals(1, present.orElse(2));
 106         assertEquals(1, present.orElseGet(null));
 107         assertEquals(1, present.orElseGet(()-> 2));
 108         assertEquals(1, present.orElseGet(()-> 3));
 109         assertEquals(1, present.<RuntimeException>orElseThrow(null));
 110         assertEquals(1, present.<RuntimeException>orElseThrow(ObscureException::new));
 111     }
 112 
 113     @Test(groups = "unit")
 114     public void testStream() {
 115         {
 116             IntStream s = OptionalInt.empty().stream();
 117             assertFalse(s.isParallel());
 118 
 119             int[] es = s.toArray();
 120             assertEquals(es.length, 0);
 121         }
 122 
 123         {
 124             IntStream s = OptionalInt.of(42).stream();
 125             assertFalse(s.isParallel());
 126 
 127             int[] es = OptionalInt.of(42).stream().toArray();
 128             assertEquals(es.length, 1);
 129             assertEquals(es[0], 42);
 130         }
 131     }
 132 
 133     private static class ObscureException extends RuntimeException {
 134 
 135     }
 136 }