@Test
public void testParse() throws Exception {
ProcessInstance process = new ProcessInstance();
process.addAttribute(new ProcessInstanceSimpleAttribute("p1", "my-very-first-param"));
process.addAttribute(new ProcessInstanceSimpleAttribute("p2", "second_param_123"));
Map<String, String> properties = new HashMap<String, String>();
properties.put("message", "${p1} and ${p2} or ${something}");
String result = processStep(new LogStep(), process, properties);