assertFalse(ruleManager.hasRule(rule2));
        assertFalse(ruleManager.hasRule(rule3));

        ruleManager.addRule(rule2);

        assertTrue(ruleManager.hasRule(rule2));
        assertFalse(ruleManager.hasRule(rule3));

        ruleManager.addRule(rule3);

        assertTrue(ruleManager.hasRule(rule2));
        assertTrue(ruleManager.hasRule(rule3));

        ruleManager.removeRule(rule2);

        ruleManager.addRule(rule1);
        ruleManager.addRule(rule2);
        ruleManager.addRule(rule3);

        assertTrue(ruleManager.hasRule(rule1));
        assertTrue(ruleManager.hasRule(rule2));
        assertTrue(ruleManager.hasRule(rule3));
        assertEquals(3, ruleManager.getRuleCount());
    }

    /**
     * Test adding null rule
     */
    public void test_addRule_null() {

     *
     * @see
     * org.codelibs.fess.crawler.rule.RuleManager#hasRule(org.codelibs.fess.crawler.rule.Rule)
     */
    /**
     * Checks if the rule manager contains the specified rule.
     * @param rule the rule to check for
     * @return true if the rule is present, false otherwise
     */
    @Override
    public boolean hasRule(final Rule rule) {
        return ruleList.contains(rule);
    }

    /*

    /**
     * Checks if the specified rule exists.
     *
     * @param rule the rule to check for existence
     * @return true if the rule exists, false otherwise
     */
    boolean hasRule(Rule rule);

            }
        }

        @Override
        public boolean removeRule(Rule rule) {
            return rules.remove(rule);
        }

        @Override
        public boolean hasRule(Rule rule) {
            return rules.contains(rule);
        }

        public List<Rule> getRules() {
            return new ArrayList<>(rules);
        }

        public void clearRules() {

        public void addRule(int index, Rule rule) {
        }

        @Override
        public boolean removeRule(Rule rule) {
            return false;
        }

        @Override
        public boolean hasRule(Rule rule) {
            return false;
        }
    }

    /**
     * Test implementation of IntervalController for testing
     */