assertNotNull(yamlOutput);
    }

    @Test
    public void test_getXContentOutputStream_success() {
        ToXContent xContent = new ToXContent() {
            @Override
            public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
                builder.startObject();
                builder.field("content", "test");
                builder.endObject();
                return builder;