return matcher.group(1);
        }
        return null;
    }

    /**
     * Gets a duplicate URL by adding or removing a trailing slash.
     *
     * @param requestData the request data to create a duplicate for
     * @return the request data with the duplicate URL
     */
    protected RequestData getDuplicateUrl(final RequestData requestData) {
        final String url = requestData.getUrl();

        assertEquals("rule2", rules.get(1).getRuleId());
        assertEquals("rule3", rules.get(2).getRuleId());
        assertEquals("rule4", rules.get(3).getRuleId());
    }

    /**
     * Test adding duplicate rules
     */
    public void test_addRule_duplicates() {
        TestRule rule = new TestRule("rule1", true);

        ruleManager.addRule(rule);
        ruleManager.addRule(rule); // Add same rule again