dcevm/dcevm/src/test/java7/com/github/dcevm/test/TestUtil.java

/*
 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * 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.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * questions.
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 */

package com.github.dcevm.test;

import junit.framework.Assert;
import com.github.dcevm.HotSwapTool;

/**
 * Utility methods for unit testing.
 *
 * @author Thomas Wuerthinger
 */
public class TestUtil {

    public static final boolean LIGHT = true;

    public static int assertException(Class exceptionClass, Runnable run) {

        try {
            run.run();
        } catch (Throwable t) {
            if (t.getClass().equals(exceptionClass)) {
                return t.getStackTrace()[0].getLineNumber();
            }
            Assert.assertTrue("An exception of type " + t.getClass().getSimpleName() + " instead of " + exceptionClass.getSimpleName() + " has been thrown!", false);
        }

        Assert.assertTrue("No exception has been thrown!", false);
        return -1;
    }

    public static int assertUnsupportedWithLight(Runnable run) {
        if (TestUtil.LIGHT) {
            return assertUnsupported(run);
        }
        run.run();
        return -1;
    }

    public static int assertUnsupported(Runnable run) {
        return assertException(UnsupportedOperationException.class, run);
    }

    public static void assertUnsupportedToVersion(final Class clazz, final int version) {
        TestUtil.assertUnsupported(new Runnable() {
            @Override
            public void run() {
                HotSwapTool.toVersion(clazz, version);
            }
        });
    }

    public static void assertUnsupportedToVersionWithLight(final Class clazz, final int version) {
        TestUtil.assertUnsupportedWithLight(new Runnable() {
            @Override
            public void run() {
                HotSwapTool.toVersion(clazz, version);
            }
        });
    }

}