Tests

We use unit test suites to verify the correctness of our virtual machine. Here you can access the source code of the tests.

/*
 * Copyright 1997-2009 Sun Microsystems, Inc.  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,
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package at.ssw.hotswap.test.body;

import static org.junit.Assert.*;

import org.junit.Before;

import org.junit.Test;

import at.ssw.hotswap.HotSwapTool;

/**
 * Recursive implementation of the fibonacci function using class redefinition.
 *
 * @author Thomas Wuerthinger
 */

public class FibTest {

    public static abstract class Base {

        protected int calc() {
            return calc(HotSwapTool.getCurrentVersion(FibTest.class));
        }

        public int calcAt(int version) {
            HotSwapTool.toVersion(FibTest.class, version);
            int result = calc();
            HotSwapTool.toVersion(FibTest.class, 0);
            return result;
        }

        protected int calc(int version) {
            return calc();
        }
    }

    public static class Fib extends Base {

        @Override
        protected int calc(int n) {
            return calcAt(n - 1) + calcAt(n - 2);
        }
    }

    public static class Fib___1 extends Base {

        @Override
        protected int calc() {
            return 1;
        }
    }

    public static class Fib___2 extends Base {

        @Override
        protected int calc() {
            return 2;
        }
    }

    @Before
    public void setUp() throws Exception {
        HotSwapTool.toVersion(FibTest.class, 0);
    }

    @Test
    public void testFib() {

        // 0 1 2 3 4 5
        // 1 1 2 3 5 8
        assert HotSwapTool.getCurrentVersion(FibTest.class) == 0;
        Fib f = new Fib();

        assertEquals(1, f.calcAt(1));

        assert HotSwapTool.getCurrentVersion(FibTest.class) == 0;
        assertEquals(2, f.calcAt(2));

        assert HotSwapTool.getCurrentVersion(FibTest.class) == 0;
        assertEquals(3, f.calcAt(3));

        assert HotSwapTool.getCurrentVersion(FibTest.class) == 0;
        assertEquals(5, f.calcAt(4));

        assert HotSwapTool.getCurrentVersion(FibTest.class) == 0;
        assertEquals(8, f.calcAt(5));
    }
}
 

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