96 lines
2.5 KiB
Rust
96 lines
2.5 KiB
Rust
#![allow(clippy::derive_partial_eq_without_eq, clippy::similar_names)]
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use serde::de::value::{self, MapAccessDeserializer};
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use serde::de::{Deserialize, Deserializer, IntoDeserializer, MapAccess, Visitor};
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use serde_derive::Deserialize;
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use serde_test::{assert_de_tokens, Token};
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use std::fmt;
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#[test]
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fn test_u32_to_enum() {
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#[derive(Deserialize, Debug, PartialEq)]
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enum E {
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A,
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B,
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}
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let deserializer = IntoDeserializer::<value::Error>::into_deserializer(1u32);
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let e: E = E::deserialize(deserializer).unwrap();
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assert_eq!(E::B, e);
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}
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#[test]
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fn test_integer128() {
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let de_u128 = IntoDeserializer::<value::Error>::into_deserializer(1u128);
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let de_i128 = IntoDeserializer::<value::Error>::into_deserializer(1i128);
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// u128 to u128
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assert_eq!(1u128, u128::deserialize(de_u128).unwrap());
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// u128 to i128
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assert_eq!(1i128, i128::deserialize(de_u128).unwrap());
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// i128 to u128
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assert_eq!(1u128, u128::deserialize(de_i128).unwrap());
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// i128 to i128
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assert_eq!(1i128, i128::deserialize(de_i128).unwrap());
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}
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#[test]
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fn test_map_access_to_enum() {
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#[derive(PartialEq, Debug)]
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struct Potential(PotentialKind);
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#[derive(PartialEq, Debug, Deserialize)]
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enum PotentialKind {
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Airebo(Airebo),
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}
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#[derive(PartialEq, Debug, Deserialize)]
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struct Airebo {
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lj_sigma: f64,
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}
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impl<'de> Deserialize<'de> for Potential {
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fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
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where
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D: Deserializer<'de>,
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{
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struct PotentialVisitor;
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impl<'de> Visitor<'de> for PotentialVisitor {
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type Value = Potential;
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fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
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write!(formatter, "a map")
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}
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fn visit_map<A>(self, map: A) -> Result<Self::Value, A::Error>
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where
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A: MapAccess<'de>,
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{
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Deserialize::deserialize(MapAccessDeserializer::new(map)).map(Potential)
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}
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}
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deserializer.deserialize_any(PotentialVisitor)
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}
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}
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let expected = Potential(PotentialKind::Airebo(Airebo { lj_sigma: 14.0 }));
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assert_de_tokens(
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&expected,
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&[
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Token::Map { len: Some(1) },
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Token::Str("Airebo"),
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Token::Map { len: Some(1) },
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Token::Str("lj_sigma"),
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Token::F64(14.0),
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Token::MapEnd,
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Token::MapEnd,
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],
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);
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}
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