assertTrue("Expected at least 100ms delay", elapsed >= 90); // Allow some tolerance
    }

    /**
     * Test delayBeforeProcessing with zero delay
     */
    public void test_delayBeforeProcessing_zeroDelay() {
        final DefaultIntervalController controller = new DefaultIntervalController();
        controller.setDelayMillisBeforeProcessing(0L);

        final long start = System.nanoTime();