@Test
    public void test_validateFilePath_blankPath() {
        final FessAdminAction action = createAction();
        assertThrows(IllegalArgumentException.class, () -> action.validateFilePath(""));
    }

    @Test
    public void test_validateFilePath_nullPath() {
        final FessAdminAction action = createAction();
        assertThrows(IllegalArgumentException.class, () -> action.validateFilePath(null));
    }