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    //! `x-www-form-urlencoded` meets Serde

    extern crate dtoa;
    extern crate itoa;

    pub mod de;
    pub mod ser;

    #[doc(inline)]
    pub use self::de::{from_bytes, from_reader, from_str, Deserializer};
    #[doc(inline)]
    pub use self::ser::{to_string, Serializer};

    #[cfg(test)]
    mod tests {
        #[test]
        fn deserialize_bytes() {
            let result = vec![("first".to_owned(), 23), ("last".to_owned(), 42)];

            assert_eq!(super::from_bytes(b"first=23&last=42"), Ok(result));
        }

        #[test]
        fn deserialize_str() {
            let result = vec![("first".to_owned(), 23), ("last".to_owned(), 42)];

            assert_eq!(super::from_str("first=23&last=42"), Ok(result));
        }

        #[test]
        fn deserialize_reader() {
            let result = vec![("first".to_owned(), 23), ("last".to_owned(), 42)];

            assert_eq!(super::from_reader(b"first=23&last=42" as &[_]), Ok(result));
        }

        #[test]
        fn deserialize_option() {
            let result = vec![
                ("first".to_owned(), Some(23)),
                ("last".to_owned(), Some(42)),
            ];
            assert_eq!(super::from_str("first=23&last=42"), Ok(result));
        }

        #[test]
        fn deserialize_unit() {
            assert_eq!(super::from_str(""), Ok(()));
            assert_eq!(super::from_str("&"), Ok(()));
            assert_eq!(super::from_str("&&"), Ok(()));
            assert!(super::from_str::<()>("first=23").is_err());
        }

        #[derive(Serialize, Deserialize, Debug, PartialEq, Eq)]
        enum X {
            A,
            B,
            C,
        }

        #[test]
        fn deserialize_unit_enum() {
            let result = vec![
                ("one".to_owned(), X::A),
                ("two".to_owned(), X::B),
                ("three".to_owned(), X::C),
            ];

            assert_eq!(super::from_str("one=A&two=B&three=C"), Ok(result));
        }

        #[test]
        fn serialize_option_map_int() {
            let params = &[("first", Some(23)), ("middle", None), ("last", Some(42))];

            assert_eq!(super::to_string(params), Ok("first=23&last=42".to_owned()));
        }

        #[test]
        fn serialize_option_map_string() {
            let params = &[
                ("first", Some("hello")),
                ("middle", None),
                ("last", Some("world")),
            ];

            assert_eq!(
                super::to_string(params),
                Ok("first=hello&last=world".to_owned())
            );
        }

        #[test]
        fn serialize_option_map_bool() {
            let params = &[("one", Some(true)), ("two", Some(false))];

            assert_eq!(
                super::to_string(params),
                Ok("one=true&two=false".to_owned())
            );
        }

        #[test]
        fn serialize_map_bool() {
            let params = &[("one", true), ("two", false)];

            assert_eq!(
                super::to_string(params),
                Ok("one=true&two=false".to_owned())
            );
        }

        #[test]
        fn serialize_unit_enum() {
            let params = &[("one", X::A), ("two", X::B), ("three", X::C)];
            assert_eq!(
                super::to_string(params),
                Ok("one=A&two=B&three=C".to_owned())
            );
        }
    }

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