} catch (Exception e) {
            fail("Should not throw exception with null AssistantDirector");
        }
    }

    public void test_multipleHookCalls_maintainsSameTimeZone() {
        // Given
        FwAssistantDirector assistantDirector = null;

        // When
        curtainBeforeHook.hook(assistantDirector);
        DfFinalTimeZoneProvider firstProvider = getDBFluteSystemTimeZoneProvider();

        FwAssistantDirector assistantDirector = createMockAssistantDirector();

        // First invocation
        curtainFinallyHook.hook(assistantDirector);

        // Second invocation - should also work without issues
        curtainFinallyHook.hook(assistantDirector);

        // Third invocation
        curtainFinallyHook.hook(assistantDirector);