ruleManager.getRule(null);
        assertEquals(3, ruleManager.getGetRuleCallCount());
    }

    /**
     * Test concurrent rule additions
     */
    public void test_concurrentAddRule() throws Exception {
        final ThreadSafeRuleManager threadSafeManager = new ThreadSafeRuleManager();
        final int threadCount = 10;
        final int rulesPerThread = 100;