Tests

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

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
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 *
 * 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.methods;

import at.ssw.hotswap.MethodRedefinitionPolicy;
import static org.junit.Assert.assertEquals;
import junit.framework.Assert;

import org.junit.Before;
import org.junit.Test;

import at.ssw.hotswap.HotSwapTool;
import at.ssw.hotswap.RedefinitionPolicy;

/**
 * Test case that calls a virtual method that was deleted through class redefinition.
 *
 * @author Thomas Wuerthinger
 */

public class CallDeletedMethodTest {

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

    // Version 0
    public static class A {

        public int value() {
            return 5;
        }

        public int oldMethod() {
            HotSwapTool.toVersion(CallDeletedMethodTest.class, 1);
            return deletedMethod();
        }

        public int deletedMethod() {
            return 1;
        }
    }

    // Version 1
    @MethodRedefinitionPolicy(RedefinitionPolicy.AccessDeletedMembers)
    public static class A___1 {

        public int oldMethod() {
            return 2;
        }
    }

    @Test
    public void testOldCodeCallsDeletedMethod() {

        assert HotSwapTool.getCurrentVersion(CallDeletedMethodTest.class) == 0;
        A a = new A();

        assertEquals(1, a.oldMethod());
        assert HotSwapTool.getCurrentVersion(CallDeletedMethodTest.class) == 1;
        assertEquals(2, a.oldMethod());

        HotSwapTool.toVersion(CallDeletedMethodTest.class, 0);

        assertEquals(1, a.oldMethod());
        assert HotSwapTool.getCurrentVersion(CallDeletedMethodTest.class) == 1;
        assertEquals(2, a.oldMethod());

        HotSwapTool.toVersion(CallDeletedMethodTest.class, 0);
    }

    @Test
    public void testNewCodeCallsDeletedMethod() {

        assert HotSwapTool.getCurrentVersion(CallDeletedMethodTest.class) == 0;

        A a = new A();
        assertEquals(5, a.value());
       
        HotSwapTool.toVersion(CallDeletedMethodTest.class, 1);

        try {
            a.value();
            Assert.fail("NoSuchMethodError exception must be thrown!");
        } catch (NoSuchMethodError e) {
            // Expected exception
        }

        HotSwapTool.toVersion(CallDeletedMethodTest.class, 0);
        assertEquals(5, a.value());
    }
}
 

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