/***
* ASM tests
* Copyright (c) 2002-2005 France Telecom
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.ow2.asm.commons;
import org.ow2.asm.ClassVisitor;
import org.ow2.asm.ClassWriter;
import org.ow2.asm.MethodVisitor;
import org.ow2.asm.Opcodes;
import junit.framework.TestCase;
/**
* StaticInitMerger tests.
*
* @author Eric Bruneton
*/
public class StaticInitMergerTest extends TestCase implements Opcodes {
private final static TestClassLoader LOADER = new TestClassLoader();
public void test() throws Exception {
ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
ClassVisitor cv = new StaticInitMerger("$clinit$", cw);
cv.visit(V1_1, ACC_PUBLIC, "A", null, "java/lang/Object", null);
cv.visitField(ACC_PUBLIC + ACC_STATIC, "counter", "I", null, null);
for (int i = 0; i < 5; ++i) {
MethodVisitor mv = cv.visitMethod(ACC_PUBLIC,
"<clinit>",
"()V",
null,
null);
mv.visitFieldInsn(GETSTATIC, "A", "counter", "I");
mv.visitInsn(ICONST_1);
mv.visitInsn(IADD);
mv.visitFieldInsn(PUTSTATIC, "A", "counter", "I");
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
}
MethodVisitor mv = cv.visitMethod(ACC_PUBLIC,
"<init>",
"()V",
null,
null);
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
cv.visitEnd();
Class<?> c = LOADER.defineClass("A", cw.toByteArray());
assertEquals(c.getField("counter").getInt(c.newInstance()), 5);
}
// ------------------------------------------------------------------------
static class TestClassLoader extends ClassLoader {
public Class<?> defineClass(final String name, final byte[] b) {
return defineClass(name, b, 0, b.length);
}
}
}