GetAllLoadedClassesTest.java

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/**
 * @test
 * @bug 4882798
 * @summary simple tests for getAllLoadedClasses (is Object there? does a newly loaded class show up?)
 * @author Gabriel Adauto, Wily Technology
 *
 * @run build GetAllLoadedClassesTest DummyClass
 * @run shell MakeJAR.sh basicAgent
 * @run main/othervm -javaagent:basicAgent.jar GetAllLoadedClassesTest GetAllLoadedClassesTest
 */

import  java.net.*;

public class
GetAllLoadedClassesTest
    extends ASimpleInstrumentationTestCase
{

    /**
     * Constructor for GetAllLoadedClassesTest.
     * @param name
     */
    public GetAllLoadedClassesTest(String name)
    {
        super(name);
    }

    public static void
    main (String[] args)
        throws Throwable {
        ATestCaseScaffold   test = new GetAllLoadedClassesTest(args[0]);
        test.runTest();
    }

    protected final void
    doRunTest()
        throws Throwable {
        testGetAllLoadedClasses();
    }

    public void
    testGetAllLoadedClasses()
        throws  Throwable
    {
        ClassLoader loader = getClass().getClassLoader();

        Class[] classes = fInst.getAllLoadedClasses();
        assertNotNull(classes);
        assertClassArrayDoesNotContainClassByName(classes, "DummyClass");
        assertClassArrayContainsClass(classes, Object.class);

        Class dummy = loader.loadClass("DummyClass");
        assertEquals("DummyClass", dummy.getName());

        // double check that we can make an instance (just to prove the loader is kosher)
        Object testInstance = dummy.newInstance();

        Class[] classes2 = fInst.getAllLoadedClasses();
        assertNotNull(classes2);
        assertClassArrayContainsClass(classes2, dummy);
    }

}