code: public static void assertInt(final String string, final StatusType status) {
  		RESTAssert.assertNotEmpty(string);
  		RESTAssert.assertPattern(string, "[+-]?[0-9]*", status);
  	}
docs: assert that string matches [+-]?[0-9]*
  
  @param string the string to check
  @param status the status code to throw
  @throws WebApplicationException with given status code