drools drl how to do not conditions

It looks like there is an open defect with the not operator

https://jira.jboss.org/browse/JBRULES-2404

Another good article on negation, uses 'neg' or 'naf' instead of 'not'

http://blog.athico.com/search?q=negation

rule "Test Rule"
   when
      testBean : testBean((testList not contains "test"  && testList2 contains "test2"))
   then
      testBean.setText( "This is a test" );
   end