Function map_incorrect_len_values

src/serde/de.rs:641–668

()

    #[test]
    #[should_panic = "next_value_seed before next_key_seed"]
    fn map_incorrect_len_values() {
        let mut map = BTreeMap::new();
        map.insert(1u8, 2u8);
        let input = crate::serialize(&map).unwrap();

        let w = super::DecoderWrapper {
            decoder: &mut super::SerdeDecoder::Unspecified { length: 1 },
            input: &mut input.as_slice(),
        };

        struct Visitor;
        impl<'de> serde::de::Visitor<'de> for Visitor {
            type Value = ();
            fn expecting(&self, _: &mut std::fmt::Formatter) -> std::fmt::Result {
                unreachable!()
            }
            fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error>
            where
                A: MapAccess<'de>,
            {
                assert_eq!(map.next_key::<u8>().unwrap().unwrap(), 1u8);
                assert_eq!(map.next_value::<u8>().unwrap(), 2u8);
                map.next_value::<u8>().unwrap();
                Ok(())
            }
        }
        w.deserialize_map(Visitor).unwrap();
    }
}