final StreamResponse streamResponse = osddHelper.asStream();
        assertEquals("application/opensearchdescription+xml; charset=null", streamResponse.getContentType());
    }

    public void test_asStream_exception_handling() {
        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {
            @Override
            public String getOsddLinkEnabled() {
                return "auto";
            }