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23 
24 /* @test
25  * @bug 8195649
26  * @summary Basic functional test of OptionalLong
27  * @author Mike Duigou
28  * @build ObscureException
29  * @run testng BasicLong
30  */
31 package test.java.util.Optional;
32 
33 // Android-added: support for wrapper to avoid d8 backporting of Optional methods (b/191859202).
34 import java.lang.invoke.MethodHandle;
35 import java.lang.invoke.MethodHandles;
36 import java.lang.invoke.MethodType;
37 import java.util.function.LongConsumer;
38 import java.util.stream.LongStream;
39 
40 import java.util.NoSuchElementException;
41 import java.util.OptionalLong;
42 import java.util.concurrent.atomic.AtomicBoolean;
43 
44 import static org.testng.Assert.*;
45 import org.testng.annotations.Test;
46 
47 public class BasicLong {
48     static final long LONGVAL = 2_305_843_008_139_952_128L;
49     static final long UNEXPECTED = 0xFEEDBEEFCAFEBABEL;
50 
51     /**
52      * Checks a block of assertions over an empty OptionalLong.
53      */
checkEmpty(OptionalLong empty)54     void checkEmpty(OptionalLong empty) {
55         assertTrue(empty.equals(OptionalLong.empty()));
56         assertTrue(OptionalLong.empty().equals(empty));
57         assertFalse(empty.equals(OptionalLong.of(UNEXPECTED)));
58         assertFalse(OptionalLong.of(UNEXPECTED).equals(empty));
59         assertFalse(empty.equals("unexpected"));
60 
61         assertFalse(empty.isPresent());
62         // Android-changed: Avoid backporting of isEmpty()) (b/191859202).
63         // assertTrue(empty.isEmpty());
64         assertTrue(OptionalLong_isEmpty(empty));
65         assertEquals(empty.hashCode(), 0);
66         assertEquals(empty.orElse(UNEXPECTED), UNEXPECTED);
67         assertEquals(empty.orElseGet(() -> UNEXPECTED), UNEXPECTED);
68 
69         assertThrows(NoSuchElementException.class, () -> empty.getAsLong());
70         // Android-changed: Avoid backporting of orElseThrow()) (b/191859202).
71         // assertThrows(NoSuchElementException.class, () -> empty.orElseThrow());
72         assertThrows(NoSuchElementException.class, () -> OptionalLong_orElseThrow(empty));
73         assertThrows(ObscureException.class,       () -> empty.orElseThrow(ObscureException::new));
74 
75         var b = new AtomicBoolean();
76         empty.ifPresent(s -> b.set(true));
77         assertFalse(b.get());
78 
79         var b1 = new AtomicBoolean(false);
80         var b2 = new AtomicBoolean(false);
81         // Android-changed: Avoid backporting of ifPresentOrElse() (b/191859202).
82         // empty.ifPresentOrElse(s -> b1.set(true), () -> b2.set(true));
83         OptionalLong_ifPresentOrElse(empty, s -> b1.set(true), () -> b2.set(true));
84         assertFalse(b1.get());
85         assertTrue(b2.get());
86 
87         assertEquals(empty.toString(), "OptionalLong.empty");
88     }
89 
90     /**
91      * Checks a block of assertions over an OptionalLong that is expected to
92      * have a particular value present.
93      */
checkPresent(OptionalLong opt, long expected)94     void checkPresent(OptionalLong opt, long expected) {
95         assertFalse(opt.equals(OptionalLong.empty()));
96         assertFalse(OptionalLong.empty().equals(opt));
97         assertTrue(opt.equals(OptionalLong.of(expected)));
98         assertTrue(OptionalLong.of(expected).equals(opt));
99         assertFalse(opt.equals(OptionalLong.of(UNEXPECTED)));
100         assertFalse(OptionalLong.of(UNEXPECTED).equals(opt));
101         assertFalse(opt.equals("unexpected"));
102 
103         assertTrue(opt.isPresent());
104         // Android-changed: Avoid backporting of isEmpty()) (b/191859202).
105         // assertFalse(opt.isEmpty());
106         assertFalse(OptionalLong_isEmpty(opt));
107         assertEquals(opt.hashCode(), Long.hashCode(expected));
108         assertEquals(opt.orElse(UNEXPECTED), expected);
109         assertEquals(opt.orElseGet(() -> UNEXPECTED), expected);
110 
111         assertEquals(opt.getAsLong(), expected);
112         // Android-changed: Avoid backporting of orElseThrow()) (b/191859202).
113         // assertEquals(opt.orElseThrow(), expected);
114         assertEquals(OptionalLong_orElseThrow(opt), expected);
115         assertEquals(opt.orElseThrow(ObscureException::new), expected);
116 
117         var b = new AtomicBoolean(false);
118         opt.ifPresent(s -> b.set(true));
119         assertTrue(b.get());
120 
121         var b1 = new AtomicBoolean(false);
122         var b2 = new AtomicBoolean(false);
123         // Android-changed: Avoid backporting of ifPresentOrElse() (b/191859202).
124         // opt.ifPresentOrElse(s -> b1.set(true), () -> b2.set(true));
125         OptionalLong_ifPresentOrElse(opt, s -> b1.set(true), () -> b2.set(true));
126         assertTrue(b1.get());
127         assertFalse(b2.get());
128 
129         assertEquals(opt.toString(), "OptionalLong[" + expected + "]");
130     }
131 
132     @Test(groups = "unit")
testEmpty()133     public void testEmpty() {
134         checkEmpty(OptionalLong.empty());
135     }
136 
137     @Test(groups = "unit")
testPresent()138     public void testPresent() {
139         checkPresent(OptionalLong.of(LONGVAL), LONGVAL);
140     }
141 
142     @Test
testStreamEmpty()143     public void testStreamEmpty() {
144         // Android-changed: Avoid backporting of stream() (b/191859202).
145         // assertEquals(OptionalLong.empty().stream().toArray(), new long[] { });
146         assertEquals(OptionalLong_stream(OptionalLong.empty()).toArray(), new long[] { });
147     }
148 
149     @Test
testStreamPresent()150     public void testStreamPresent() {
151         // Android-changed: Avoid backporting of stream() (b/191859202).
152         // assertEquals(OptionalLong.of(LONGVAL).stream().toArray(), new long[] { LONGVAL });
153         assertEquals(OptionalLong_stream(OptionalLong.of(LONGVAL)).toArray(),
154                      new long[] { LONGVAL });
155     }
156 
157     // Android-added: wrapper for d8 backport of OptionalLong.ifPresentOrElse() (b/191859202).
OptionalLong_ifPresentOrElse( OptionalLong receiver, LongConsumer action, Runnable emptyAction)158     private static void OptionalLong_ifPresentOrElse(
159             OptionalLong receiver, LongConsumer action, Runnable emptyAction) {
160         try {
161             MethodType type =
162                     MethodType.methodType(void.class, LongConsumer.class, Runnable.class);
163             MethodHandle mh =
164                     MethodHandles.lookup().findVirtual(OptionalLong.class, "ifPresentOrElse", type);
165             mh.invokeExact(receiver, action, emptyAction);
166         } catch (Throwable t) {
167             throw new RuntimeException(t);
168         }
169     }
170 
171     // Android-added: wrapper to avoid d8 backport of OptionalLong.isEmpty() (b/191859202).
OptionalLong_isEmpty(OptionalLong receiver)172     private static boolean OptionalLong_isEmpty(OptionalLong receiver) {
173         try {
174             MethodType type = MethodType.methodType(boolean.class);
175             MethodHandle mh =
176                     MethodHandles.lookup().findVirtual(OptionalLong.class, "isEmpty", type);
177             return (boolean) mh.invokeExact(receiver);
178         } catch (Throwable t) {
179             throw new RuntimeException(t);
180         }
181     }
182 
183     // Android-added: wrapper to avoid d8 backport of OptionalLong.orElseThrow() (b/191859202).
OptionalLong_orElseThrow(OptionalLong receiver)184     private static long OptionalLong_orElseThrow(OptionalLong receiver) {
185         try {
186             MethodType type = MethodType.methodType(long.class);
187             MethodHandle mh =
188                     MethodHandles.lookup().findVirtual(OptionalLong.class, "orElseThrow", type);
189             return (long) mh.invokeExact(receiver);
190         } catch (NoSuchElementException expected) {
191             throw expected;  // Underlying method may throw NoSuchElementException
192         } catch (Throwable t) {
193             throw new RuntimeException(t);
194         }
195     }
196 
197     // Android-added: wrapper to avoid d8 backport of OptionalLong.stream() (b/191859202).
OptionalLong_stream(OptionalLong receiver)198     private static LongStream OptionalLong_stream(OptionalLong receiver) {
199         try {
200             MethodType type = MethodType.methodType(LongStream.class);
201             MethodHandle mh =
202                     MethodHandles.lookup().findVirtual(OptionalLong.class, "stream", type);
203             return (LongStream) mh.invokeExact(receiver);
204         } catch (Throwable t) {
205             throw new RuntimeException(t);
206         }
207     }
208 }
209