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
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 * 2 along with this work; if not, write to the Free Software Foundation,
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package at.ssw.hotswap.test.methods;

import static org.junit.Assert.assertEquals;

import java.lang.reflect.Method;

import junit.framework.Assert;

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

import at.ssw.hotswap.HotSwapTool;

/**
 * Testing correct reflection functionality after class redefinition.
 *
 * @author Thomas Wuerthinger
 */

public class ReflectionTest {

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

    // Version 0
    public static class A {

        public int value() {
            return 1;
        }
    }

    public static class B extends A {

        @Override
        public int value() {
            return 2;
        }
    }

    public static class C extends B {

        @Override
        public int value() {
            return 3;
        }
    }

    // Version 1
    public static class A___1 {

        public int value() {
            return 1;
        }

        public int value2() {
            return 2;
        }
    }

    // Version 2
    public static class C___2 extends A {

        @Override
        public int value() {
            return super.value();
        }
    }

    @Test
    public void testMethodReflection() {

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

        A a = new A();
        B b = new B();
        C c = new C();

        assertEquals(1, a.value());
        assertEquals(2, b.value());
        assertEquals(3, c.value());

        assertContainsMethod(A.class, "value");
        assertDoesNotContainMethod(A.class, "value2");

        HotSwapTool.toVersion(ReflectionTest.class, 1);

        assertEquals(1, a.value());
        assertEquals(2, b.value());
        assertEquals(3, c.value());

        assertContainsMethod(A.class, "value");
        assertContainsMethod(A.class, "value2");

        HotSwapTool.toVersion(ReflectionTest.class, 0);

        assertEquals(1, a.value());
        assertEquals(2, b.value());
        assertEquals(3, c.value());

        assertContainsMethod(A.class, "value");
        assertDoesNotContainMethod(A.class, "value2");
    }

    private void assertContainsMethod(Class<?> c, String methodName) {
        boolean found = false;
        for (Method m : c.getDeclaredMethods()) {
            if (m.getName().equals(methodName)) {
                found = true;
                break;
            }
        }

        Assert.assertTrue(found);
    }

    private void assertDoesNotContainMethod(Class<?> c, String methodName) {
        boolean found = false;
        for (Method m : c.getDeclaredMethods()) {
            if (m.getName().equals(methodName)) {
                found = true;
                break;
            }
        }

        Assert.assertFalse(found);
    }

    private void assertIsSuper(Class<?> s, Class<?> c) {
        assertEquals(s, c.getSuperclass());
    }

    private void assertIsNotSuper(Class<?> s, Class<?> c) {
        Assert.assertFalse(s.equals(c.getSuperclass()));
    }

    @Test
    public void testClassReflection() {

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

        A a = new A();
        B b = new B();
        C c = new C();

        assertIsSuper(A.class, B.class);
        assertIsSuper(B.class, C.class);
        assertIsNotSuper(A.class, C.class);

        assertEquals(1, a.value());
        assertEquals(2, b.value());
        assertEquals(3, c.value());

        HotSwapTool.toVersion(ReflectionTest.class, 2);

        assertIsSuper(A.class, B.class);
        assertIsNotSuper(B.class, C.class);
        assertIsSuper(A.class, C.class);

        assertEquals(1, a.value());
        assertEquals(2, b.value());
        assertEquals(1, c.value());

        HotSwapTool.toVersion(ReflectionTest.class, 0);

        assertIsSuper(A.class, B.class);
        assertIsNotSuper(A.class, C.class);
        assertIsSuper(B.class, C.class);

        assertEquals(1, a.value());
        assertEquals(2, b.value());
        assertEquals(3, c.value());
    }
}
 

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