src/test/java/org/apache/bcel/InstructionFinderTest.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.bcel;

import static org.junit.jupiter.api.Assertions.assertEquals;

import java.util.Iterator;

import org.apache.bcel.classfile.JavaClass;
import org.apache.bcel.classfile.Method;
import org.apache.bcel.generic.InstructionHandle;
import org.apache.bcel.generic.InstructionList;
import org.apache.bcel.util.InstructionFinder;
import org.junit.jupiter.api.Test;

class InstructionFinderTest extends AbstractTest {
    @Test
    void testSearchAll() throws Exception {
        final JavaClass clazz = getTestJavaClass(PACKAGE_BASE_NAME + ".util.InstructionFinder");
        final Method[] methods = clazz.getMethods();
        Method searchM = null;
        for (final Method m : methods) {
            if (m.getName().equals("search") && m.getArgumentTypes().length == 3) {
                searchM = m;
                break;
            }
        }

        if (searchM == null) {
            throw new Exception("search method not found");
        }

        final byte[] bytes = searchM.getCode().getCode();
        final InstructionList il = new InstructionList(bytes);
        final InstructionFinder finder = new InstructionFinder(il);
        final Iterator<?> it = finder.search(".*", il.getStart(), null);

        final InstructionHandle[] ihs = (InstructionHandle[]) it.next();
        int size = 0;
        for (final InstructionHandle ih : ihs) {
            size += ih.getInstruction().getLength();
        }
        assertEquals(bytes.length, size);

    }
}