### Question:
ClassDefinitionUtils { @SuppressWarnings("unchecked") public static <T> Class<T> defineClass(String className, byte[] b, Class<?> neighbor, ClassLoader loader) throws Exception { Class<T> c = (Class<T>) DefineClassHelper.defineClass(className, b, 0, b.length, neighbor, loader, PROTECTION_DOMAIN); Class.forName(className, true, loader); return c; } private  ClassDefinitionUtils(); @SuppressWarnings("unchecked") static Class<T> defineClass(String className, byte[] b, Class<?> neighbor, ClassLoader loader); static byte[] readClass(String className); static void writeClass(String fileName, byte[] bytes); static final byte OPS_aload_0; static final byte OPS_invokespecial; static final byte OPS_return; static final byte OPS_new; static final byte OPS_dup; static final byte OPS_areturn; static final int CONSTANT_Utf8; static final int CONSTANT_Integer; static final int CONSTANT_Float; static final int CONSTANT_Long; static final int CONSTANT_Double; static final int CONSTANT_Class; static final int CONSTANT_String; static final int CONSTANT_Fieldref; static final int CONSTANT_Methodref; static final int CONSTANT_InterfaceMethodref; static final int CONSTANT_NameAndType; static final int CONSTANT_MethodHandle; static final int CONSTANT_MethodType; static final int CONSTANT_InvokeDynamic; static final int ACC_PUBLIC; static final int ACC_FINAL; static final int ACC_SUPER; static final int ACC_INTERFACE; static final int ACC_ABSTRACT; static final int ACC_SYNTHETIC; static final int ACC_ANNOTATION; static final int ACC_ENUM; static final byte[] MAGIC; static final byte[] VERSION; }### Answer:
@Test public void testDefineClass() throws Exception { byte[] b = ClassDefinitionUtils.readClass(className); Class<?> c = ClassDefinitionUtils.defineClass(className, b, Objenesis.class, getClass().getClassLoader()); assertEquals(c.getName(), className); }