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/*
* Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/* @test
* @bug 8206955
* @run testng/othervm -ea -esa test.java.lang.invoke.MethodHandlesProxiesTest
*/
package test.java.lang.invoke;
import org.testng.annotations.Test;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandleProxies;
import java.lang.invoke.MethodHandles;
import static org.testng.Assert.assertEquals;
public class MethodHandlesProxiesTest {
public interface A {
default String a() {
return "A";
}
}
public interface B {
default String b() {
return "B";
}
}
public interface C extends A, B {
String f();
default String c() {
return "C";
}
default String concat() {
return a() + b() + c();
}
}
public interface Override extends C {
String f();
default String a() {
return "OA";
}
default String b() {
return "OB";
}
default String c() {
return "OC";
}
}
@Test
public static void testDefaultMethods() throws Throwable {
MethodHandle target = MethodHandles.constant(String.class, "F");
C proxy = MethodHandleProxies.asInterfaceInstance(C.class, target);
assertEquals(proxy.f(), "F");
assertEquals(proxy.a(), "A");
assertEquals(proxy.b(), "B");
assertEquals(proxy.c(), "C");
assertEquals(proxy.concat(), "ABC");
}
@Test
public static void testOverriddenDefaultMethods() throws Throwable {
MethodHandle target = MethodHandles.constant(String.class, "F");
Override proxy = MethodHandleProxies.asInterfaceInstance(Override.class, target);
assertEquals(proxy.a(), "OA");
assertEquals(proxy.b(), "OB");
assertEquals(proxy.c(), "OC");
}
}
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