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.
 *
 * 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.
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package at.ssw.hotswap.test.fields;

import static org.junit.Assert.assertEquals;

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

import at.ssw.hotswap.HotSwapTool;
import at.ssw.hotswap.test.TestUtil;

/**
 * Tests for accessing a deleted static field.
 *
 * @author Thomas Wuerthinger
 */

public class AccessDeletedStaticFieldTest {

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

    // Version 0
    public static class A {

        public static int x;

        static int getFieldInOldCode() {
           
            HotSwapTool.toVersion(AccessDeletedStaticFieldTest.class, 1);

            newMethodFromOldCode();

            // This field does no longer exist
            return x;
        }

        static int getFieldEMCPMethod() {
            HotSwapTool.toVersion(AccessDeletedStaticFieldTest.class, 2);
            return A.x;
        }
    }

    // Version 1
    public static class A___1 {
    }

    // Version 2

    public static class A___2 {

        // EMCP to method in version 0
        static int getFieldEMCPMethod() {
            HotSwapTool.toVersion(AccessDeletedStaticFieldTest.class, 2);
            return A.x;
        }
    }

    private static void newMethodFromOldCode() {
        TestUtil.assertException(NoSuchFieldError.class, new Runnable() {
            @Override
            public void run() {
                System.out.println(A.x);
            }
        });
    }

    @Test
    public void testAccessDeletedStaticField() {

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

        A.x = 1;
        assertEquals(1, A.getFieldInOldCode());

        assert HotSwapTool.getCurrentVersion(AccessDeletedStaticFieldTest.class) == 1;
        HotSwapTool.toVersion(AccessDeletedStaticFieldTest.class, 0);
        assertEquals(0, A.x);
       
        assert HotSwapTool.getCurrentVersion(AccessDeletedStaticFieldTest.class) == 0;
    }


    @Test
    public void testAccessDeletedStaticFieldFromEMCPMethod() {

        assert HotSwapTool.getCurrentVersion(AccessDeletedStaticFieldTest.class) == 0;
        TestUtil.assertException(NoSuchFieldError.class, new Runnable() {
            @Override
            public void run() {
                System.out.println(A.getFieldEMCPMethod());
            }
        });
       
        HotSwapTool.toVersion(AccessDeletedStaticFieldTest.class, 0);
        assertEquals(0, A.x);

        assert HotSwapTool.getCurrentVersion(AccessDeletedStaticFieldTest.class) == 0;
    }
}
 

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