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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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13  * accompanied this code).
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23 
24 package test.sun.invoke.util;
25 
26 import sun.invoke.util.ValueConversions;
27 import sun.invoke.util.Wrapper;
28 import java.lang.invoke.MethodHandles;
29 import java.lang.invoke.MethodType;
30 import java.lang.invoke.MethodHandle;
31 import java.io.Serializable;
32 import java.util.Arrays;
33 import org.junit.Test;
34 import static org.junit.Assert.*;
35 
36 /* @test
37  * @summary unit tests to assert Wrapper zero identities and conversion behave correctly
38  * @modules java.base/sun.invoke.util
39  * @compile -XDignore.symbol.file WrapperTest.java
40  * @run junit test.sun.invoke.util.WrapperTest
41  */
42 public class WrapperTest {
43 
44     @Test
testShortZeroConversion()45     public void testShortZeroConversion() throws Throwable {
46         MethodHandle h1 = MethodHandles.constant(Short.class, (short)42);
47         MethodHandle h2 = h1.asType(MethodType.methodType(void.class));  // drop 42
48         MethodHandle h3 = h2.asType(MethodType.methodType(short.class));  // add 0
49         MethodHandle h4 = h3.asType(MethodType.methodType(Object.class));  // box
50 
51         Object x = h4.invokeExact();
52         assertEquals(x, (short)0);
53         assertTrue(x == Short.valueOf((short)0));
54         assertTrue(x == Wrapper.SHORT.zero());
55     }
56 
57     @Test
testIntZeroConversion()58     public void testIntZeroConversion() throws Throwable {
59         MethodHandle h1 = MethodHandles.constant(Integer.class, 42);
60         MethodHandle h2 = h1.asType(MethodType.methodType(void.class));  // drop 42
61         MethodHandle h3 = h2.asType(MethodType.methodType(int.class));  // add 0
62         MethodHandle h4 = h3.asType(MethodType.methodType(Object.class));  // box
63 
64         Object x = h4.invokeExact();
65         assertEquals(x, 0);
66         assertTrue(x == Integer.valueOf(0));
67         assertTrue(x == Wrapper.INT.zero());
68     }
69 
70     @Test
testLongZeroConversion()71     public void testLongZeroConversion() throws Throwable {
72         MethodHandle h1 = MethodHandles.constant(Long.class, 42L);
73         MethodHandle h2 = h1.asType(MethodType.methodType(void.class));  // drop 42
74         MethodHandle h3 = h2.asType(MethodType.methodType(long.class));  // add 0
75         MethodHandle h4 = h3.asType(MethodType.methodType(Object.class));  // box
76 
77         Object x = h4.invokeExact();
78         assertEquals(x, 0L);
79         assertTrue(x == Long.valueOf(0));
80         assertTrue(x == Wrapper.LONG.zero());
81     }
82 
83     @Test
testByteZeroConversion()84     public void testByteZeroConversion() throws Throwable {
85         MethodHandle h1 = MethodHandles.constant(Byte.class, (byte)42);
86         MethodHandle h2 = h1.asType(MethodType.methodType(void.class));  // drop 42
87         MethodHandle h3 = h2.asType(MethodType.methodType(byte.class));  // add 0
88         MethodHandle h4 = h3.asType(MethodType.methodType(Object.class));  // box
89 
90         Object x = h4.invokeExact();
91         assertEquals(x, (byte)0);
92         assertTrue(x == Byte.valueOf((byte)0));
93         assertTrue(x == Wrapper.BYTE.zero());
94     }
95 
96     @Test
testCharacterZeroConversion()97     public void testCharacterZeroConversion() throws Throwable {
98         MethodHandle h1 = MethodHandles.constant(Character.class, (char)42);
99         MethodHandle h2 = h1.asType(MethodType.methodType(void.class));  // drop 42
100         MethodHandle h3 = h2.asType(MethodType.methodType(char.class));  // add 0
101         MethodHandle h4 = h3.asType(MethodType.methodType(Object.class));  // box
102 
103         Object x = h4.invokeExact();
104         assertEquals(x, (char)0);
105         assertTrue(x == Character.valueOf((char)0));
106         assertTrue(x == Wrapper.CHAR.zero());
107     }
108 }
109