// when
CmmnActivity activity = handler.handleElement(planItem, context);
// then
ProcessTaskActivityBehavior behavior = (ProcessTaskActivityBehavior) activity.getActivityBehavior();
CallableElement callableElement = behavior.getCallableElement();
List<CallableElementParameter> outputs = callableElement.getOutputs();
assertNotNull(outputs);
assertFalse(outputs.isEmpty());
assertEquals(3, outputs.size());