code: @Test public void testParseEmptySubsystem() throws Exception {
    String subsystemXml="<subsystem xmlns=\"" + JacORBSubsystemParser.Namespace.CURRENT.getUriString() + "\">"+ "</subsystem>";
    List<ModelNode> operations=super.parse(subsystemXml);
    Assert.assertEquals(1,operations.size());
    ModelNode addSubsystem=operations.get(0);
    Assert.assertEquals(ADD,addSubsystem.get(OP).asString());
    PathAddress addr=PathAddress.pathAddress(addSubsystem.get(OP_ADDR));
    Assert.assertEquals(1,addr.size());
    PathElement element=addr.getElement(0);
    Assert.assertEquals(SUBSYSTEM,element.getKey());
    Assert.assertEquals(JacORBExtension.SUBSYSTEM_NAME,element.getValue());
  }
  