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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 * 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).
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 * 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;
import at.ssw.hotswap.test.methods.OverrideMethodTest;

/**
 * Class for testing redefining methods of classes that extend the Thread class. In the test setup the run method
 * calls the doit method in a loop until this methods returns false.
 *
 * @author Thomas Wuerthinger
 */

public class MultipleThreadsTest {

    public static final int COUNT = 10;

    // Version 0
    public static class A extends Thread {

        private int value;
        private int value2;

        @Override
        public void run() {
            while (doit()) {
            }
        }

        public boolean doit() {
            try {
                Thread.sleep(1);
            } catch (InterruptedException e) {
            }

            value++;
            return true;
        }

        public int getValue() {
            return value;
        }

        public int getValue2() {
            return value2;
        }
    }

    // Version 1
    public static class A___1 extends Thread {

        private int value;
        private int value2;

        @Override
        public void run() {
            while (doit()) {
            }
        }

        public boolean doit() {
            try {
                Thread.sleep(1);
            } catch (InterruptedException e) {
            }

            value2++;
            return true;
        }

        public int getValue() {
            return value;
        }

        public int getValue2() {
            return value2;
        }
    }

    // Version 2
    public static class A___2 extends Thread {

        private int value;
        private int value2;

        @Override
        public void run() {
            while (doit()) {
            }
        }

        public boolean doit() {
            return false;
        }

        public int getValue() {
            return value;
        }

        public int getValue2() {
            return value2;
        }
    }

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

    @Test
    public void testOneThread() {
        test(1);
    }

    @Test
    public void testThreads() {
        test(COUNT);
    }

    private void test(int count) {

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

        A[] arr = new A[count];
        for (int i = 0; i < count; i++) {
            arr[i] = new A();
            arr[i].start();
        }

        try {
            Thread.sleep(500);
        } catch (InterruptedException e) {
        }

        for (int i = 0; i < count; i++) {
            assertTrue(arr[i].getValue() > 0);
        }

        HotSwapTool.toVersion(MultipleThreadsTest.class, 1);

        try {
            Thread.sleep(500);
        } catch (InterruptedException e) {
        }

        for (int i = 0; i < count; i++) {
            assertTrue(arr[i].getValue2() > 0);
        }

        HotSwapTool.toVersion(MultipleThreadsTest.class, 2);

        try {
            Thread.sleep(500);
        } catch (InterruptedException e) {
        }


        for (int i = 0; i < count; i++) {
            assertFalse(arr[i].isAlive());
        }

        HotSwapTool.toVersion(OverrideMethodTest.class, 0);


    }
}
 

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