if (groovyEngine != null) {
            groovyEngine.close();
        }
        ComponentUtil.setFessConfig(null);
        super.tearDown(testInfo);
    }

    @Test
    public void test_evaluate() {
        final Map<String, Object> params = new HashMap<>();
        assertNull(groovyEngine.evaluate("", params));
        assertEquals("", groovyEngine.evaluate("return ''", params));