assertTrue("All load methods should be called within 5 seconds", latch.await(5, TimeUnit.SECONDS));
        assertEquals(3, configHelper.getLoadCallCount());
    }

    @Test
    public void test_load_returnsExpectedValue() {
        configHelper.setLoadCallback(() -> 42);
        assertEquals(42, configHelper.load());

        configHelper.setLoadCallback(() -> 0);
        assertEquals(0, configHelper.load());