9812a4c9c6
This feature adds support for the default to be specified to be some expression (which unfortunately needs to be parsed from a string) without needing this value to have an implementation of `Default`, or for a new-type wrapper in order to provide an alternative implementation. This expression is run in a function, and therefore has no access to any of the internal state of the deserializer.
485 lines
10 KiB
Rust
485 lines
10 KiB
Rust
use token::{
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Error,
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Token,
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assert_tokens,
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assert_ser_tokens,
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assert_de_tokens,
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assert_de_tokens_error
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};
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trait Trait {
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fn my_default() -> Self;
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}
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impl Trait for i32 {
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fn my_default() -> Self { 123 }
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}
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#[derive(Debug, PartialEq, Serialize, Deserialize)]
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struct DefaultStruct<A, B: Default, C> where C: Trait {
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a1: A,
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#[serde(default)]
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a2: B,
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#[serde(default="Trait::my_default()")]
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a3: C,
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}
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#[test]
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fn test_default_struct() {
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assert_de_tokens(
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&DefaultStruct { a1: 1, a2: 2, a3: 3 },
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vec![
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Token::StructStart("DefaultStruct", Some(3)),
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Token::MapSep,
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Token::Str("a1"),
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Token::I32(1),
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Token::MapSep,
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Token::Str("a2"),
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Token::I32(2),
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Token::MapSep,
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Token::Str("a3"),
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Token::I32(3),
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Token::MapEnd,
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]
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);
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assert_de_tokens(
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&DefaultStruct { a1: 1, a2: 0, a3: 123 },
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vec![
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Token::StructStart("DefaultStruct", Some(1)),
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Token::MapSep,
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Token::Str("a1"),
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Token::I32(1),
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Token::MapEnd,
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]
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);
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}
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#[derive(Debug, PartialEq, Serialize, Deserialize)]
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enum DefaultEnum<A, B: Default, C> where C: Trait {
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Struct {
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a1: A,
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#[serde(default)]
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a2: B,
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#[serde(default="Trait::my_default()")]
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a3: C,
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}
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}
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#[test]
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fn test_default_enum() {
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assert_de_tokens(
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&DefaultEnum::Struct { a1: 1, a2: 2, a3: 3 },
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vec![
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Token::EnumMapStart("DefaultEnum", "Struct", Some(3)),
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Token::MapSep,
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Token::Str("a1"),
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Token::I32(1),
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Token::MapSep,
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Token::Str("a2"),
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Token::I32(2),
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Token::MapSep,
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Token::Str("a3"),
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Token::I32(3),
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Token::MapEnd,
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]
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);
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assert_de_tokens(
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&DefaultEnum::Struct { a1: 1, a2: 0, a3: 123 },
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vec![
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Token::EnumMapStart("DefaultEnum", "Struct", Some(3)),
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Token::MapSep,
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Token::Str("a1"),
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Token::I32(1),
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Token::MapEnd,
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]
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);
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}
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#[derive(Debug, PartialEq, Serialize, Deserialize)]
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#[serde(deny_unknown_fields)]
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struct DenyUnknown {
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a1: i32,
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}
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#[test]
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fn test_ignore_unknown() {
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// 'Default' allows unknown. Basic smoke test of ignore...
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assert_de_tokens(
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&DefaultStruct { a1: 1, a2: 2, a3: 3 },
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vec![
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Token::StructStart("DefaultStruct", Some(5)),
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Token::MapSep,
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Token::Str("whoops1"),
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Token::I32(2),
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Token::MapSep,
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Token::Str("a1"),
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Token::I32(1),
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Token::MapSep,
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Token::Str("whoops2"),
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Token::SeqStart(Some(1)),
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Token::SeqSep,
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Token::I32(2),
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Token::SeqEnd,
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Token::MapSep,
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Token::Str("a2"),
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Token::I32(2),
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Token::MapSep,
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Token::Str("whoops3"),
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Token::I32(2),
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Token::MapSep,
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Token::Str("a3"),
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Token::I32(3),
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Token::MapEnd,
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]
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);
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assert_de_tokens_error::<DenyUnknown>(
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vec![
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Token::StructStart("DenyUnknown", Some(2)),
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Token::MapSep,
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Token::Str("a1"),
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Token::I32(1),
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Token::MapSep,
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Token::Str("whoops"),
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Token::I32(2),
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Token::MapEnd,
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],
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Error::UnknownFieldError("whoops".to_owned())
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);
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}
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#[derive(Debug, PartialEq, Serialize, Deserialize)]
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#[serde(rename="Superhero")]
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struct RenameStruct {
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a1: i32,
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#[serde(rename="a3")]
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a2: i32,
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}
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#[derive(Debug, PartialEq, Serialize, Deserialize)]
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#[serde(rename(serialize="SuperheroSer", deserialize="SuperheroDe"))]
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struct RenameStructSerializeDeserialize {
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a1: i32,
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#[serde(rename(serialize="a4", deserialize="a5"))]
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a2: i32,
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}
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#[test]
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fn test_rename_struct() {
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assert_tokens(
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&RenameStruct { a1: 1, a2: 2 },
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vec![
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Token::StructStart("Superhero", Some(2)),
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Token::MapSep,
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Token::Str("a1"),
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Token::I32(1),
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Token::MapSep,
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Token::Str("a3"),
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Token::I32(2),
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Token::MapEnd,
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]
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);
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assert_ser_tokens(
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&RenameStructSerializeDeserialize { a1: 1, a2: 2 },
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&[
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Token::StructStart("SuperheroSer", Some(2)),
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Token::MapSep,
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Token::Str("a1"),
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Token::I32(1),
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Token::MapSep,
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Token::Str("a4"),
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Token::I32(2),
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Token::MapEnd,
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]
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);
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assert_de_tokens(
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&RenameStructSerializeDeserialize { a1: 1, a2: 2 },
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vec![
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Token::StructStart("SuperheroDe", Some(2)),
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Token::MapSep,
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Token::Str("a1"),
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Token::I32(1),
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Token::MapSep,
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Token::Str("a5"),
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Token::I32(2),
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Token::MapEnd,
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]
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);
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}
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#[derive(Debug, PartialEq, Serialize, Deserialize)]
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#[serde(rename="Superhero")]
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enum RenameEnum {
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#[serde(rename="bruce_wayne")]
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Batman,
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#[serde(rename="clark_kent")]
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Superman(i8),
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#[serde(rename="diana_prince")]
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WonderWoman(i8, i8),
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#[serde(rename="barry_allan")]
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Flash {
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#[serde(rename="b")]
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a: i32,
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},
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}
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#[derive(Debug, PartialEq, Deserialize, Serialize)]
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#[serde(rename(serialize="SuperheroSer", deserialize="SuperheroDe"))]
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enum RenameEnumSerializeDeserialize<A> {
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#[serde(rename(serialize="dick_grayson", deserialize="jason_todd"))]
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Robin {
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a: i8,
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#[serde(rename(serialize="c", deserialize="d"))]
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b: A,
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},
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}
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#[test]
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fn test_rename_enum() {
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assert_tokens(
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&RenameEnum::Batman,
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vec![
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Token::EnumUnit("Superhero", "bruce_wayne"),
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]
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);
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assert_tokens(
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&RenameEnum::Superman(0),
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vec![
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Token::EnumNewtype("Superhero", "clark_kent"),
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Token::I8(0),
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]
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);
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assert_tokens(
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&RenameEnum::WonderWoman(0, 1),
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vec![
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Token::EnumSeqStart("Superhero", "diana_prince", Some(2)),
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Token::SeqSep,
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Token::I8(0),
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Token::SeqSep,
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Token::I8(1),
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Token::SeqEnd,
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]
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);
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assert_tokens(
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&RenameEnum::Flash { a: 1 },
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vec![
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Token::EnumMapStart("Superhero", "barry_allan", Some(1)),
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Token::MapSep,
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Token::Str("b"),
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Token::I32(1),
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Token::MapEnd,
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]
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);
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assert_ser_tokens(
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&RenameEnumSerializeDeserialize::Robin {
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a: 0,
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b: String::new(),
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},
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&[
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Token::EnumMapStart("SuperheroSer", "dick_grayson", Some(2)),
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Token::MapSep,
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Token::Str("a"),
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Token::I8(0),
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Token::MapSep,
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Token::Str("c"),
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Token::Str(""),
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Token::MapEnd,
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]
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);
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assert_de_tokens(
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&RenameEnumSerializeDeserialize::Robin {
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a: 0,
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b: String::new(),
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},
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vec![
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Token::EnumMapStart("SuperheroDe", "jason_todd", Some(2)),
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Token::MapSep,
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Token::Str("a"),
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Token::I8(0),
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Token::MapSep,
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Token::Str("d"),
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Token::Str(""),
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Token::MapEnd,
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]
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);
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}
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#[derive(Debug, PartialEq, Serialize)]
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struct SkipSerializingStruct<'a, B, D, E> {
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a: &'a i8,
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#[serde(skip_serializing)]
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b: B,
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#[serde(skip_serializing_if_none)]
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d: Option<D>,
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#[serde(skip_serializing_if_empty)]
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e: Vec<E>,
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}
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#[test]
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fn test_skip_serializing_struct() {
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let a = 1;
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assert_ser_tokens(
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&SkipSerializingStruct {
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a: &a,
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b: 2,
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d: Some(4),
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e: vec![5],
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},
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&[
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Token::StructStart("SkipSerializingStruct", Some(3)),
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Token::MapSep,
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Token::Str("a"),
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Token::I8(1),
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Token::MapSep,
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Token::Str("d"),
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Token::Option(true),
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Token::I32(4),
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Token::MapSep,
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Token::Str("e"),
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Token::SeqStart(Some(1)),
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Token::SeqSep,
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Token::I32(5),
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Token::SeqEnd,
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Token::MapEnd,
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]
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);
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assert_ser_tokens(
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&SkipSerializingStruct {
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a: &a,
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b: 2,
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d: None::<u8>,
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e: Vec::<u8>::new(),
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},
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&[
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Token::StructStart("SkipSerializingStruct", Some(1)),
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Token::MapSep,
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Token::Str("a"),
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Token::I8(1),
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Token::MapEnd,
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]
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);
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}
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#[derive(Debug, PartialEq, Serialize)]
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enum SkipSerializingEnum<'a, B, D, E> {
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Struct {
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a: &'a i8,
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#[serde(skip_serializing)]
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_b: B,
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#[serde(skip_serializing_if_none)]
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d: Option<D>,
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#[serde(skip_serializing_if_empty)]
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e: Vec<E>,
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}
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}
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#[test]
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fn test_skip_serializing_enum() {
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let a = 1;
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assert_ser_tokens(
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&SkipSerializingEnum::Struct {
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a: &a,
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_b: 2,
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d: Some(4),
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e: vec![5],
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},
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&[
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Token::EnumMapStart("SkipSerializingEnum", "Struct", Some(3)),
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Token::MapSep,
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Token::Str("a"),
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Token::I8(1),
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Token::MapSep,
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Token::Str("d"),
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Token::Option(true),
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Token::I32(4),
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Token::MapSep,
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Token::Str("e"),
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Token::SeqStart(Some(1)),
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Token::SeqSep,
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Token::I32(5),
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Token::SeqEnd,
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Token::MapEnd,
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]
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);
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assert_ser_tokens(
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&SkipSerializingEnum::Struct {
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a: &a,
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_b: 2,
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d: None::<u8>,
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e: Vec::<u8>::new(),
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},
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&[
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Token::EnumMapStart("SkipSerializingEnum", "Struct", Some(1)),
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Token::MapSep,
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Token::Str("a"),
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Token::I8(1),
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Token::MapEnd,
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]
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);
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}
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