@Test
public void createRuleUnitDescriptionFromString() {

    RuleUnitComponentFactoryImpl r = new RuleUnitComponentFactoryImpl();
    KnowledgePackageImpl fooBar = new KnowledgePackageImpl("org.drools.ruleunit");
    assertNull(r.createRuleUnitDescription(fooBar, "org.drools.ruleunit.TestRuleUnit.class"));
}