MHProxiesTest.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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package org.openjdk.tests.java.lang.invoke;

import org.testng.annotations.Test;

import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandleProxies;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;

import static org.testng.Assert.assertEquals;

/**
 * MHProxiesTest -- regression test for MH library bug
 */
@Test
public class MHProxiesTest {
    public interface Sam { double m(int arg); }

    public static Byte m(int arg) { return (byte) arg; }

    public void testProxy() throws NoSuchMethodException, IllegalAccessException {
        MethodHandle m = MethodHandles.lookup().findStatic(MHProxiesTest.class, "m",
                                                           MethodType.methodType(Byte.class, int.class));
        Sam s = MethodHandleProxies.asInterfaceInstance(Sam.class, m);
        assertEquals(66d, s.m(66));
    }
}