String theWsdl = "the theWsdl";
String thePortType = "the portType";
String theOperationName = "the operation name";
MockAttributes attrs = new MockAttributes();
attrs.setValue("wsdl", theWsdl);
attrs.setValue("portType", thePortType);
attrs.setValue("operation", theOperationName);
process.processAttributes(attrs);
XMLPipelineContext context = process.getPipelineContext();
Operation operation = (Operation) context.getProperty(Operation.class);