assertNotNull(appType);
        // appType should be either empty string or the actual env value
        assertTrue(appType.isEmpty() || appType.length() > 0);
    }

    @Test
    public void test_getOverrideConfPath() {
        // Test when app type is not docker
        OptionalEntity<String> confPath = ResourceUtil.getOverrideConfPath();
        assertNotNull(confPath);
        // Should be empty when not docker app type