mod simple_value {
    use serde::{Deserialize, Serialize};
    use serde_dhall::{
        from_str, serialize, FromDhall, NumKind, SimpleValue, ToDhall,
    };

    fn assert_de<T>(s: &str, x: T)
    where
        T: FromDhall + PartialEq + std::fmt::Debug,
    {
        assert_eq!(from_str(s).parse::<T>().map_err(|e| e.to_string()), Ok(x));
    }
    fn assert_ser<T>(s: &str, x: T)
    where
        T: ToDhall + PartialEq + std::fmt::Debug,
    {
        assert_eq!(
            serialize(&x).to_string().map_err(|e| e.to_string()),
            Ok(s.to_string())
        );
    }
    fn assert_serde<T>(s: &str, x: T)
    where
        T: ToDhall + FromDhall + PartialEq + std::fmt::Debug + Clone,
    {
        assert_de(s, x.clone());
        assert_ser(s, x);
    }

    #[test]
    fn test_serde() {
        let bool_true = SimpleValue::Num(NumKind::Bool(true));
        // https://github.com/Nadrieril/dhall-rust/issues/184
        // assert_serde("[ True ]", vec![bool_true.clone()]);
        assert_de("< Foo >.Foo", SimpleValue::Union("Foo".into(), None));
        assert_de(
            "< Foo: Bool >.Foo True",
            SimpleValue::Union("Foo".into(), Some(Box::new(bool_true.clone()))),
        );

        // assert_eq!(
        //     serialize(&SimpleValue::Optional(None)).to_string().map_err(|e| e.to_string()),
        //     Err("cannot serialize value without a type annotation: Optional(None)".to_string())
        // );

        // #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
        // struct Foo {
        //     foo: SimpleValue,
        // }
        // assert_serde(
        //     "{ foo = True }",
        //     Foo {
        //         foo: bool_true.clone(),
        //     },
        // );
    }
}