} finally {
            System.clearProperty(Constants.FESS_CONFIG_PREFIX + arrayKey);
        }
    }

    // Test property key with dots
    @Test
    public void test_get_propertyKeyWithDots() {
        String dottedKey = "deeply.nested.property.key";
        String dottedValue = "nested-value";

        System.setProperty(Constants.FESS_CONFIG_PREFIX + dottedKey, dottedValue);

        try {