pub mod data;
pub mod transient_0;

#[cfg(test)]
mod test {
    use std::io::Cursor;
    use super::data::{InnerStruct, OuterStruct, StructWithBool, StructWithInt32, StructWithInt64, StructWithString};

    #[test]
    fn struct_with_bool() {
        let value = StructWithBool { a: true, b: false };

        assert_round_trip_encoding(
            value,
            super::data::transient_0::encode_struct_with_bool,
            super::data::transient_0::decode_struct_with_bool,
        );
    }

    #[test]
    fn struct_with_int_32() {
        let value = StructWithInt32 { a: 10, b: 25 };

        assert_round_trip_encoding(
            value,
            super::data::transient_0::encode_struct_with_int_32,
            super::data::transient_0::decode_struct_with_int_32,
        );
    }

    #[test]
    fn struct_with_int_64() {
        let value = StructWithInt64 { a: 10, b: 25 };

        assert_round_trip_encoding(
            value,
            super::data::transient_0::encode_struct_with_int_64,
            super::data::transient_0::decode_struct_with_int_64,
        );
    }

    #[test]
    fn struct_with_string() {
        let value = StructWithString { a: "abc".to_string(), b: "def".to_string() };

        assert_round_trip_encoding(
            value,
            super::data::transient_0::encode_struct_with_string,
            super::data::transient_0::decode_struct_with_string,
        );
    }

    #[test]
    fn nested_struct() {
        let value = OuterStruct { inner: InnerStruct { a: 10, b: 25 }, c: 42 };

        assert_round_trip_encoding(
            value,
            super::data::transient_0::encode_outer_struct,
            super::data::transient_0::decode_outer_struct,
        );
    }

    fn assert_round_trip_encoding<T: std::cmp::PartialEq + std::fmt::Debug>(
        value: T,
        encode: impl Fn(&T, &mut Cursor<Vec<u8>>) -> std::io::Result<()>,
        decode: impl Fn(&mut Cursor<Vec<u8>>) -> std::io::Result<T>,
    ) {
        let mut bytes = Cursor::new(Vec::new());
        encode(&value, &mut bytes).unwrap();

        bytes.set_position(0);
        let decoded_value = decode(&mut bytes).unwrap();

        assert_eq!(value, decoded_value);
    }
}