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use futures_util::future::ready;
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use tower_service::Service;
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use tower_util::service_fn;
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#[tokio::test]
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async fn simple() {
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let mut add_one = service_fn(|req| ready(Ok::<_, ()>(req + 1)));
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let answer = add_one.call(1).await.unwrap();
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assert_eq!(answer, 2);
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}
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