public class SimpleModelTest {
@Test
public void connvertModelToXML() throws Exception {
BpmnModel bpmnModel = new BpmnModel();
Process process = bpmnModel.getMainProcess();
StartEvent startEvent = new StartEvent();
startEvent.setId("startEvent1");
process.addFlowElement(startEvent);
UserTask task = new UserTask();
task.setId("reviewTask");
task.setAssignee("kermit");
process.addFlowElement(task);
SequenceFlow flow1 = new SequenceFlow();
flow1.setId("flow1");
flow1.setSourceRef("startEvent1");
flow1.setTargetRef("reviewTask");
process.addFlowElement(flow1);
EndEvent endEvent = new EndEvent();
endEvent.setId("endEvent1");
process.addFlowElement(endEvent);
BpmnXMLConverter converter = new BpmnXMLConverter();
System.out.println(new String(converter.convertToXML(bpmnModel)));
}