1 /*
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23 
24 
25 /*
26  * @test
27  * @summary Test ConstantDesc for value classes
28  * @enablePreview
29  * @run junit/othervm ValueConstantDesc
30  */
31 
32 import java.lang.constant.ClassDesc;
33 import java.lang.invoke.MethodHandles;
34 import java.util.stream.Stream;
35 
36 import org.junit.jupiter.params.ParameterizedTest;
37 import org.junit.jupiter.params.provider.Arguments;
38 import org.junit.jupiter.params.provider.MethodSource;
39 import static org.junit.jupiter.api.Assertions.*;
40 
41 public class ValueConstantDesc {
42     static value class V { }
43 
44     private static final MethodHandles.Lookup LOOKUP = MethodHandles.lookup();
45 
46     static Stream<Arguments> testCases() {
47         return Stream.of(
48                 Arguments.of(V.class, "LValueConstantDesc$V;", "ValueConstantDesc$V"),
49                 Arguments.of(V[].class, "[LValueConstantDesc$V;", "ValueConstantDesc$V[]"),
50                 Arguments.of(V[][].class, "[[LValueConstantDesc$V;", "ValueConstantDesc$V[][]")
51         );
52     }
53 
54     @ParameterizedTest
55     @MethodSource("testCases")
56     public void classDesc(Class<?> type, String descriptor, String displayName) throws ReflectiveOperationException {
57         ClassDesc cd = type.describeConstable().orElseThrow();
58         ClassDesc desc = ClassDesc.ofDescriptor(descriptor);
59 
60         if (type.isArray()) {
61             assertTrue(cd.isArray());
62             assertFalse(cd.isClassOrInterface());
63         } else {
64             assertFalse(cd.isArray());
65             assertTrue(cd.isClassOrInterface());
66         }
67         assertEquals(cd, desc);
68         assertEquals(cd.displayName(), displayName);
69         assertEquals(cd.descriptorString(), type.descriptorString());
70 
71         Class<?> c = cd.resolveConstantDesc(LOOKUP);
72         assertTrue(c == type);
73     }
74 }