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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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* 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.
*
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package com.github.dcevm.test.methods;
import org.junit.Before;
import org.junit.Test;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import static com.github.dcevm.test.util.HotSwapTestHelper.__toVersion__;
import static com.github.dcevm.test.util.HotSwapTestHelper.__version__;
import static org.junit.Assert.assertEquals;
/**
* Test for replacing method with MethodHandle pointing to it.
*
* @author Ivan Dubrov
*/
public class MethodHandleTest {
// Version 0
public static class A {
public int method() {
return 1;
}
public static int staticMethod() {
return 3;
}
}
// Version 1
public static class A___1 {
public int method() {
return 2;
}
public static int staticMethod() {
return 4;
}
}
@Before
public void setUp() throws Exception {
__toVersion__(0);
}
@Test
public void testMethodHandleUpdated() throws Throwable {
assert __version__() == 0;
MethodHandles.Lookup lookup = MethodHandles.lookup();
MethodHandle handle = lookup.findVirtual(A.class, "method", MethodType.methodType(int.class));
A a = new A();
assertEquals(1, handle.invoke(a));
__toVersion__(1);
assertEquals(2, handle.invoke(a));
__toVersion__(0);
assert __version__() == 0;
}
@Test
public void testStaticMethodHandleUpdated() throws Throwable {
assert __version__() == 0;
MethodHandles.Lookup lookup = MethodHandles.lookup();
MethodHandle handle = lookup.findStatic(A.class, "staticMethod", MethodType.methodType(int.class));
assertEquals(3, handle.invoke());
__toVersion__(1);
assertEquals(4, handle.invoke());
__toVersion__(0);
assert __version__() == 0;
}
}