76 lines
2.9 KiB
Java
76 lines
2.9 KiB
Java
/*
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* Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8299505
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* @run junit FindVirtualArrayCloneTest
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* @summary Test invocation of Object.clone for arrays
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*/
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import org.junit.jupiter.api.Test;
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import org.junit.jupiter.params.ParameterizedTest;
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import org.junit.jupiter.params.provider.ValueSource;
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import java.lang.invoke.MethodHandles;
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import java.lang.invoke.MethodType;
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import static org.junit.jupiter.api.Assertions.assertSame;
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import static org.junit.jupiter.api.Assertions.assertArrayEquals;
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public class FindVirtualArrayCloneTest {
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/**
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* array clone should be bound to the array class (public)
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*/
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@ValueSource(classes = {Object[].class, int[].class, long[].class, byte[].class, double[].class})
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@ParameterizedTest
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public void checkArrayCloneReceiver(Class<?> arrayClass) throws Throwable {
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var lookup = MethodHandles.lookup();
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var cloneMh = lookup.findVirtual(arrayClass, "clone", MethodType.methodType(Object.class));
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assertSame(arrayClass, cloneMh.type().parameterType(0));
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}
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/**
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* Object.clone should be bound to the lookup class (protected)
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*/
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@Test
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public void checkProtectedCloneReceiver() throws Throwable {
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var lookup = MethodHandles.lookup();
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var cloneMh = lookup.findVirtual(Object.class, "clone", MethodType.methodType(Object.class));
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assertSame(lookup.lookupClass(), cloneMh.type().parameterType(0));
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}
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@Test
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public void checkArrayClone() throws Throwable {
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var array = new String[] {"apple", "pear", "banana"};
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var regularClone = array.clone();
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var cloneMh = MethodHandles.lookup()
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.findVirtual(String[].class, "clone", MethodType.methodType(Object.class))
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.asType(MethodType.methodType(String[].class, String[].class));
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var mhClone = (String[]) cloneMh.invokeExact((String[]) array);
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assertArrayEquals(array, mhClone);
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assertArrayEquals(regularClone, mhClone);
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}
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}
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