src/test/java/org/apache/bcel/util/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
 *
 *   http://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,
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 * See the License for the specific language governing permissions and
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package org.apache.bcel.util;

import java.util.Iterator;

import org.apache.bcel.AbstractTestCase;
import org.apache.bcel.generic.IADD;
import org.apache.bcel.generic.ILOAD;
import org.apache.bcel.generic.ISTORE;
import org.apache.bcel.generic.InstructionHandle;
import org.apache.bcel.generic.InstructionList;

public class InstructionFinderTest extends AbstractTestCase {

    public void testSearch() {
        final InstructionList il = new InstructionList();
        il.append(new ILOAD(1));
        il.append(new ILOAD(2));
        il.append(new IADD());
        il.append(new ISTORE(3));
        final InstructionFinder finder = new InstructionFinder(il);

        final Iterator<?> it = finder.search("ILOAD IADD", il.getInstructionHandles()[0], null );
        final InstructionHandle[] ihs = (InstructionHandle[])it.next();
        assertEquals(2, ihs.length);
        assertEquals(ihs[0].getInstruction(), new ILOAD(2));
        assertEquals(ihs[1].getInstruction(), new IADD());
    }
}