serde/test_suite/tests/test_annotations.rs
2018-03-20 15:19:36 +01:00

1766 lines
41 KiB
Rust

// Copyright 2017 Serde Developers
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
#![cfg_attr(feature = "cargo-clippy", allow(cast_lossless))]
#[macro_use]
extern crate serde_derive;
extern crate serde;
use std::collections::HashMap;
use self::serde::{Deserialize, Deserializer, Serialize, Serializer};
use self::serde::de::{self, Unexpected};
extern crate serde_test;
use self::serde_test::{assert_de_tokens, assert_de_tokens_error, assert_ser_tokens,
assert_ser_tokens_error, assert_tokens, Token};
trait MyDefault: Sized {
fn my_default() -> Self;
}
trait ShouldSkip: Sized {
fn should_skip(&self) -> bool;
}
trait SerializeWith: Sized {
fn serialize_with<S>(&self, ser: S) -> Result<S::Ok, S::Error>
where
S: Serializer;
}
trait DeserializeWith: Sized {
fn deserialize_with<'de, D>(de: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>;
}
impl MyDefault for i32 {
fn my_default() -> Self {
123
}
}
impl ShouldSkip for i32 {
fn should_skip(&self) -> bool {
*self == 123
}
}
impl SerializeWith for i32 {
fn serialize_with<S>(&self, ser: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
if *self == 123 {
true.serialize(ser)
} else {
false.serialize(ser)
}
}
}
impl DeserializeWith for i32 {
fn deserialize_with<'de, D>(de: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
if try!(Deserialize::deserialize(de)) {
Ok(123)
} else {
Ok(2)
}
}
}
#[derive(Debug, PartialEq, Serialize, Deserialize)]
struct DefaultStruct<A, B, C, D, E>
where
C: MyDefault,
E: MyDefault,
{
a1: A,
#[serde(default)]
a2: B,
#[serde(default = "MyDefault::my_default")]
a3: C,
#[serde(skip_deserializing)]
a4: D,
#[serde(skip_deserializing, default = "MyDefault::my_default")]
a5: E,
}
#[derive(Debug, PartialEq, Serialize, Deserialize)]
struct CollectOther {
a: u32,
b: u32,
#[serde(flatten)]
extra: HashMap<String, u32>,
}
#[derive(Debug, PartialEq, Serialize, Deserialize)]
struct FlattenStructEnumWrapper {
#[serde(flatten)]
data: FlattenStructEnum,
#[serde(flatten)]
extra: HashMap<String, String>,
}
#[derive(Debug, PartialEq, Serialize, Deserialize)]
#[serde(rename_all = "snake_case")]
enum FlattenStructEnum {
InsertInteger {
index: u32,
value: u32
},
}
#[derive(Debug, PartialEq, Serialize, Deserialize)]
struct FlattenStructTagContentEnumWrapper {
outer: u32,
#[serde(flatten)]
data: FlattenStructTagContentEnumNewtype,
}
#[derive(Debug, PartialEq, Serialize, Deserialize)]
struct FlattenStructTagContentEnumNewtype(pub FlattenStructTagContentEnum);
#[derive(Debug, PartialEq, Serialize, Deserialize)]
#[serde(rename_all = "snake_case", tag = "type", content = "value")]
enum FlattenStructTagContentEnum {
InsertInteger {
index: u32,
value: u32
},
NewtypeVariant(FlattenStructTagContentEnumNewtypeVariant),
}
#[derive(Debug, PartialEq, Serialize, Deserialize)]
struct FlattenStructTagContentEnumNewtypeVariant {
value: u32,
}
#[test]
fn test_default_struct() {
assert_de_tokens(
&DefaultStruct {
a1: 1,
a2: 2,
a3: 3,
a4: 0,
a5: 123,
},
&[
Token::Struct {
name: "DefaultStruct",
len: 3,
},
Token::Str("a1"),
Token::I32(1),
Token::Str("a2"),
Token::I32(2),
Token::Str("a3"),
Token::I32(3),
Token::Str("a4"),
Token::I32(4),
Token::Str("a5"),
Token::I32(5),
Token::StructEnd,
],
);
assert_de_tokens(
&DefaultStruct {
a1: 1,
a2: 0,
a3: 123,
a4: 0,
a5: 123,
},
&[
Token::Struct {
name: "DefaultStruct",
len: 3,
},
Token::Str("a1"),
Token::I32(1),
Token::StructEnd,
],
);
}
#[derive(Debug, PartialEq, Serialize, Deserialize)]
enum DefaultEnum<A, B, C, D, E>
where
C: MyDefault,
E: MyDefault,
{
Struct {
a1: A,
#[serde(default)]
a2: B,
#[serde(default = "MyDefault::my_default")]
a3: C,
#[serde(skip_deserializing)]
a4: D,
#[serde(skip_deserializing, default = "MyDefault::my_default")]
a5: E,
},
}
#[test]
fn test_default_enum() {
assert_de_tokens(
&DefaultEnum::Struct {
a1: 1,
a2: 2,
a3: 3,
a4: 0,
a5: 123,
},
&[
Token::StructVariant {
name: "DefaultEnum",
variant: "Struct",
len: 3,
},
Token::Str("a1"),
Token::I32(1),
Token::Str("a2"),
Token::I32(2),
Token::Str("a3"),
Token::I32(3),
Token::Str("a4"),
Token::I32(4),
Token::Str("a5"),
Token::I32(5),
Token::StructVariantEnd,
],
);
assert_de_tokens(
&DefaultEnum::Struct {
a1: 1,
a2: 0,
a3: 123,
a4: 0,
a5: 123,
},
&[
Token::StructVariant {
name: "DefaultEnum",
variant: "Struct",
len: 3,
},
Token::Str("a1"),
Token::I32(1),
Token::StructVariantEnd,
],
);
}
// Does not implement std::default::Default.
#[derive(Debug, PartialEq, Deserialize)]
struct NoStdDefault(i8);
impl MyDefault for NoStdDefault {
fn my_default() -> Self {
NoStdDefault(123)
}
}
#[derive(Debug, PartialEq, Deserialize)]
struct ContainsNoStdDefault<A: MyDefault> {
#[serde(default = "MyDefault::my_default")]
a: A,
}
// Tests that a struct field does not need to implement std::default::Default if
// it is annotated with `default=...`.
#[test]
fn test_no_std_default() {
assert_de_tokens(
&ContainsNoStdDefault {
a: NoStdDefault(123),
},
&[
Token::Struct {
name: "ContainsNoStdDefault",
len: 1,
},
Token::StructEnd,
],
);
assert_de_tokens(
&ContainsNoStdDefault { a: NoStdDefault(8) },
&[
Token::Struct {
name: "ContainsNoStdDefault",
len: 1,
},
Token::Str("a"),
Token::NewtypeStruct {
name: "NoStdDefault",
},
Token::I8(8),
Token::StructEnd,
],
);
}
// Does not implement Deserialize.
#[derive(Debug, PartialEq)]
struct NotDeserializeStruct(i8);
impl Default for NotDeserializeStruct {
fn default() -> Self {
NotDeserializeStruct(123)
}
}
impl DeserializeWith for NotDeserializeStruct {
fn deserialize_with<'de, D>(_: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
panic!()
}
}
// Does not implement Deserialize.
#[derive(Debug, PartialEq)]
enum NotDeserializeEnum {
Trouble,
}
impl MyDefault for NotDeserializeEnum {
fn my_default() -> Self {
NotDeserializeEnum::Trouble
}
}
#[derive(Debug, PartialEq, Deserialize)]
struct ContainsNotDeserialize<A, B, C: DeserializeWith, E: MyDefault> {
#[serde(skip_deserializing)]
a: A,
#[serde(skip_deserializing, default)]
b: B,
#[serde(deserialize_with = "DeserializeWith::deserialize_with", default)]
c: C,
#[serde(skip_deserializing, default = "MyDefault::my_default")]
e: E,
}
// Tests that a struct field does not need to implement Deserialize if it is
// annotated with skip_deserializing, whether using the std Default or a
// custom default.
#[test]
fn test_elt_not_deserialize() {
assert_de_tokens(
&ContainsNotDeserialize {
a: NotDeserializeStruct(123),
b: NotDeserializeStruct(123),
c: NotDeserializeStruct(123),
e: NotDeserializeEnum::Trouble,
},
&[
Token::Struct {
name: "ContainsNotDeserialize",
len: 1,
},
Token::StructEnd,
],
);
}
#[derive(Debug, PartialEq, Serialize, Deserialize)]
#[serde(deny_unknown_fields)]
struct DenyUnknown {
a1: i32,
}
#[test]
fn test_ignore_unknown() {
// 'Default' allows unknown. Basic smoke test of ignore...
assert_de_tokens(
&DefaultStruct {
a1: 1,
a2: 2,
a3: 3,
a4: 0,
a5: 123,
},
&[
Token::Struct {
name: "DefaultStruct",
len: 3,
},
Token::Str("whoops1"),
Token::I32(2),
Token::Str("a1"),
Token::I32(1),
Token::Str("whoops2"),
Token::Seq { len: Some(1) },
Token::I32(2),
Token::SeqEnd,
Token::Str("a2"),
Token::I32(2),
Token::Str("whoops3"),
Token::I32(2),
Token::Str("a3"),
Token::I32(3),
Token::StructEnd,
],
);
assert_de_tokens_error::<DenyUnknown>(
&[
Token::Struct {
name: "DenyUnknown",
len: 1,
},
Token::Str("a1"),
Token::I32(1),
Token::Str("whoops"),
],
"unknown field `whoops`, expected `a1`",
);
}
#[derive(Debug, PartialEq, Serialize, Deserialize)]
#[serde(rename = "Superhero")]
struct RenameStruct {
a1: i32,
#[serde(rename = "a3")]
a2: i32,
}
#[derive(Debug, PartialEq, Serialize, Deserialize)]
#[serde(rename(serialize = "SuperheroSer", deserialize = "SuperheroDe"))]
struct RenameStructSerializeDeserialize {
a1: i32,
#[serde(rename(serialize = "a4", deserialize = "a5"))]
a2: i32,
}
#[test]
fn test_rename_struct() {
assert_tokens(
&RenameStruct { a1: 1, a2: 2 },
&[
Token::Struct {
name: "Superhero",
len: 2,
},
Token::Str("a1"),
Token::I32(1),
Token::Str("a3"),
Token::I32(2),
Token::StructEnd,
],
);
assert_ser_tokens(
&RenameStructSerializeDeserialize { a1: 1, a2: 2 },
&[
Token::Struct {
name: "SuperheroSer",
len: 2,
},
Token::Str("a1"),
Token::I32(1),
Token::Str("a4"),
Token::I32(2),
Token::StructEnd,
],
);
assert_de_tokens(
&RenameStructSerializeDeserialize { a1: 1, a2: 2 },
&[
Token::Struct {
name: "SuperheroDe",
len: 2,
},
Token::Str("a1"),
Token::I32(1),
Token::Str("a5"),
Token::I32(2),
Token::StructEnd,
],
);
}
#[derive(Debug, PartialEq, Serialize, Deserialize)]
#[serde(rename = "Superhero")]
enum RenameEnum {
#[serde(rename = "bruce_wayne")]
Batman,
#[serde(rename = "clark_kent")]
Superman(i8),
#[serde(rename = "diana_prince")]
WonderWoman(i8, i8),
#[serde(rename = "barry_allan")]
Flash {
#[serde(rename = "b")]
a: i32,
},
}
#[derive(Debug, PartialEq, Deserialize, Serialize)]
#[serde(rename(serialize = "SuperheroSer", deserialize = "SuperheroDe"))]
enum RenameEnumSerializeDeserialize<A> {
#[serde(rename(serialize = "dick_grayson", deserialize = "jason_todd"))]
Robin {
a: i8,
#[serde(rename(serialize = "c"))]
#[serde(rename(deserialize = "d"))]
b: A,
},
}
#[test]
fn test_rename_enum() {
assert_tokens(
&RenameEnum::Batman,
&[
Token::UnitVariant {
name: "Superhero",
variant: "bruce_wayne",
},
],
);
assert_tokens(
&RenameEnum::Superman(0),
&[
Token::NewtypeVariant {
name: "Superhero",
variant: "clark_kent",
},
Token::I8(0),
],
);
assert_tokens(
&RenameEnum::WonderWoman(0, 1),
&[
Token::TupleVariant {
name: "Superhero",
variant: "diana_prince",
len: 2,
},
Token::I8(0),
Token::I8(1),
Token::TupleVariantEnd,
],
);
assert_tokens(
&RenameEnum::Flash { a: 1 },
&[
Token::StructVariant {
name: "Superhero",
variant: "barry_allan",
len: 1,
},
Token::Str("b"),
Token::I32(1),
Token::StructVariantEnd,
],
);
assert_ser_tokens(
&RenameEnumSerializeDeserialize::Robin {
a: 0,
b: String::new(),
},
&[
Token::StructVariant {
name: "SuperheroSer",
variant: "dick_grayson",
len: 2,
},
Token::Str("a"),
Token::I8(0),
Token::Str("c"),
Token::Str(""),
Token::StructVariantEnd,
],
);
assert_de_tokens(
&RenameEnumSerializeDeserialize::Robin {
a: 0,
b: String::new(),
},
&[
Token::StructVariant {
name: "SuperheroDe",
variant: "jason_todd",
len: 2,
},
Token::Str("a"),
Token::I8(0),
Token::Str("d"),
Token::Str(""),
Token::StructVariantEnd,
],
);
}
#[derive(Debug, PartialEq, Serialize)]
struct SkipSerializingStruct<'a, B, C>
where
C: ShouldSkip,
{
a: &'a i8,
#[serde(skip_serializing)]
b: B,
#[serde(skip_serializing_if = "ShouldSkip::should_skip")]
c: C,
}
#[test]
fn test_skip_serializing_struct() {
let a = 1;
assert_ser_tokens(
&SkipSerializingStruct { a: &a, b: 2, c: 3 },
&[
Token::Struct {
name: "SkipSerializingStruct",
len: 2,
},
Token::Str("a"),
Token::I8(1),
Token::Str("c"),
Token::I32(3),
Token::StructEnd,
],
);
assert_ser_tokens(
&SkipSerializingStruct {
a: &a,
b: 2,
c: 123,
},
&[
Token::Struct {
name: "SkipSerializingStruct",
len: 1,
},
Token::Str("a"),
Token::I8(1),
Token::StructEnd,
],
);
}
#[derive(Debug, PartialEq, Serialize, Deserialize)]
struct SkipStruct<B> {
a: i8,
#[serde(skip)]
b: B,
}
#[test]
fn test_skip_struct() {
assert_ser_tokens(
&SkipStruct { a: 1, b: 2 },
&[
Token::Struct {
name: "SkipStruct",
len: 1,
},
Token::Str("a"),
Token::I8(1),
Token::StructEnd,
],
);
assert_de_tokens(
&SkipStruct { a: 1, b: 0 },
&[
Token::Struct {
name: "SkipStruct",
len: 1,
},
Token::Str("a"),
Token::I8(1),
Token::StructEnd,
],
);
}
#[derive(Debug, PartialEq, Serialize)]
enum SkipSerializingEnum<'a, B, C>
where
C: ShouldSkip,
{
Struct {
a: &'a i8,
#[serde(skip_serializing)]
_b: B,
#[serde(skip_serializing_if = "ShouldSkip::should_skip")]
c: C,
},
}
#[test]
fn test_skip_serializing_enum() {
let a = 1;
assert_ser_tokens(
&SkipSerializingEnum::Struct { a: &a, _b: 2, c: 3 },
&[
Token::StructVariant {
name: "SkipSerializingEnum",
variant: "Struct",
len: 2,
},
Token::Str("a"),
Token::I8(1),
Token::Str("c"),
Token::I32(3),
Token::StructVariantEnd,
],
);
assert_ser_tokens(
&SkipSerializingEnum::Struct {
a: &a,
_b: 2,
c: 123,
},
&[
Token::StructVariant {
name: "SkipSerializingEnum",
variant: "Struct",
len: 1,
},
Token::Str("a"),
Token::I8(1),
Token::StructVariantEnd,
],
);
}
#[derive(Debug, PartialEq)]
struct NotSerializeStruct(i8);
#[derive(Debug, PartialEq)]
enum NotSerializeEnum {
Trouble,
}
impl SerializeWith for NotSerializeEnum {
fn serialize_with<S>(&self, ser: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
"trouble".serialize(ser)
}
}
#[derive(Debug, PartialEq, Serialize)]
struct ContainsNotSerialize<'a, B, C, D>
where
B: 'a,
D: SerializeWith,
{
a: &'a Option<i8>,
#[serde(skip_serializing)]
b: &'a B,
#[serde(skip_serializing)]
c: Option<C>,
#[serde(serialize_with = "SerializeWith::serialize_with")]
d: D,
}
#[test]
fn test_elt_not_serialize() {
let a = 1;
assert_ser_tokens(
&ContainsNotSerialize {
a: &Some(a),
b: &NotSerializeStruct(2),
c: Some(NotSerializeEnum::Trouble),
d: NotSerializeEnum::Trouble,
},
&[
Token::Struct {
name: "ContainsNotSerialize",
len: 2,
},
Token::Str("a"),
Token::Some,
Token::I8(1),
Token::Str("d"),
Token::Str("trouble"),
Token::StructEnd,
],
);
}
#[derive(Debug, PartialEq, Serialize)]
struct SerializeWithStruct<'a, B>
where
B: SerializeWith,
{
a: &'a i8,
#[serde(serialize_with = "SerializeWith::serialize_with")]
b: B,
}
#[test]
fn test_serialize_with_struct() {
let a = 1;
assert_ser_tokens(
&SerializeWithStruct { a: &a, b: 2 },
&[
Token::Struct {
name: "SerializeWithStruct",
len: 2,
},
Token::Str("a"),
Token::I8(1),
Token::Str("b"),
Token::Bool(false),
Token::StructEnd,
],
);
assert_ser_tokens(
&SerializeWithStruct { a: &a, b: 123 },
&[
Token::Struct {
name: "SerializeWithStruct",
len: 2,
},
Token::Str("a"),
Token::I8(1),
Token::Str("b"),
Token::Bool(true),
Token::StructEnd,
],
);
}
#[derive(Debug, PartialEq, Serialize)]
enum SerializeWithEnum<'a, B>
where
B: SerializeWith,
{
Struct {
a: &'a i8,
#[serde(serialize_with = "SerializeWith::serialize_with")]
b: B,
},
}
#[test]
fn test_serialize_with_enum() {
let a = 1;
assert_ser_tokens(
&SerializeWithEnum::Struct { a: &a, b: 2 },
&[
Token::StructVariant {
name: "SerializeWithEnum",
variant: "Struct",
len: 2,
},
Token::Str("a"),
Token::I8(1),
Token::Str("b"),
Token::Bool(false),
Token::StructVariantEnd,
],
);
assert_ser_tokens(
&SerializeWithEnum::Struct { a: &a, b: 123 },
&[
Token::StructVariant {
name: "SerializeWithEnum",
variant: "Struct",
len: 2,
},
Token::Str("a"),
Token::I8(1),
Token::Str("b"),
Token::Bool(true),
Token::StructVariantEnd,
],
);
}
#[derive(Debug, PartialEq, Serialize, Deserialize)]
enum WithVariant {
#[serde(serialize_with = "serialize_unit_variant_as_i8")]
#[serde(deserialize_with = "deserialize_i8_as_unit_variant")]
Unit,
#[serde(serialize_with = "SerializeWith::serialize_with")]
#[serde(deserialize_with = "DeserializeWith::deserialize_with")]
Newtype(i32),
#[serde(serialize_with = "serialize_variant_as_string")]
#[serde(deserialize_with = "deserialize_string_as_variant")]
Tuple(String, u8),
#[serde(serialize_with = "serialize_variant_as_string")]
#[serde(deserialize_with = "deserialize_string_as_variant")]
Struct { f1: String, f2: u8 },
}
fn serialize_unit_variant_as_i8<S>(serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
serializer.serialize_i8(0)
}
fn deserialize_i8_as_unit_variant<'de, D>(deserializer: D) -> Result<(), D::Error>
where
D: Deserializer<'de>,
{
let n = i8::deserialize(deserializer)?;
match n {
0 => Ok(()),
_ => Err(de::Error::invalid_value(Unexpected::Signed(n as i64), &"0")),
}
}
fn serialize_variant_as_string<S>(f1: &str, f2: &u8, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
serializer.serialize_str(format!("{};{:?}", f1, f2).as_str())
}
fn deserialize_string_as_variant<'de, D>(deserializer: D) -> Result<(String, u8), D::Error>
where
D: Deserializer<'de>,
{
let s = String::deserialize(deserializer)?;
let mut pieces = s.split(';');
let f1 = match pieces.next() {
Some(x) => x,
None => return Err(de::Error::invalid_length(0, &"2")),
};
let f2 = match pieces.next() {
Some(x) => x,
None => return Err(de::Error::invalid_length(1, &"2")),
};
let f2 = match f2.parse() {
Ok(n) => n,
Err(_) => {
return Err(de::Error::invalid_value(
Unexpected::Str(f2),
&"an 8-bit signed integer",
));
}
};
Ok((f1.into(), f2))
}
#[test]
fn test_serialize_with_variant() {
assert_ser_tokens(
&WithVariant::Unit,
&[
Token::NewtypeVariant {
name: "WithVariant",
variant: "Unit",
},
Token::I8(0),
],
);
assert_ser_tokens(
&WithVariant::Newtype(123),
&[
Token::NewtypeVariant {
name: "WithVariant",
variant: "Newtype",
},
Token::Bool(true),
],
);
assert_ser_tokens(
&WithVariant::Tuple("hello".into(), 0),
&[
Token::NewtypeVariant {
name: "WithVariant",
variant: "Tuple",
},
Token::Str("hello;0"),
],
);
assert_ser_tokens(
&WithVariant::Struct {
f1: "world".into(),
f2: 1,
},
&[
Token::NewtypeVariant {
name: "WithVariant",
variant: "Struct",
},
Token::Str("world;1"),
],
);
}
#[test]
fn test_deserialize_with_variant() {
assert_de_tokens(
&WithVariant::Unit,
&[
Token::NewtypeVariant {
name: "WithVariant",
variant: "Unit",
},
Token::I8(0),
],
);
assert_de_tokens(
&WithVariant::Newtype(123),
&[
Token::NewtypeVariant {
name: "WithVariant",
variant: "Newtype",
},
Token::Bool(true),
],
);
assert_de_tokens(
&WithVariant::Tuple("hello".into(), 0),
&[
Token::NewtypeVariant {
name: "WithVariant",
variant: "Tuple",
},
Token::Str("hello;0"),
],
);
assert_de_tokens(
&WithVariant::Struct {
f1: "world".into(),
f2: 1,
},
&[
Token::NewtypeVariant {
name: "WithVariant",
variant: "Struct",
},
Token::Str("world;1"),
],
);
}
#[derive(Debug, PartialEq, Deserialize)]
struct DeserializeWithStruct<B>
where
B: DeserializeWith,
{
a: i8,
#[serde(deserialize_with = "DeserializeWith::deserialize_with")]
b: B,
}
#[test]
fn test_deserialize_with_struct() {
assert_de_tokens(
&DeserializeWithStruct { a: 1, b: 2 },
&[
Token::Struct {
name: "DeserializeWithStruct",
len: 2,
},
Token::Str("a"),
Token::I8(1),
Token::Str("b"),
Token::Bool(false),
Token::StructEnd,
],
);
assert_de_tokens(
&DeserializeWithStruct { a: 1, b: 123 },
&[
Token::Struct {
name: "DeserializeWithStruct",
len: 2,
},
Token::Str("a"),
Token::I8(1),
Token::Str("b"),
Token::Bool(true),
Token::StructEnd,
],
);
}
#[derive(Debug, PartialEq, Deserialize)]
enum DeserializeWithEnum<B>
where
B: DeserializeWith,
{
Struct {
a: i8,
#[serde(deserialize_with = "DeserializeWith::deserialize_with")]
b: B,
},
}
#[test]
fn test_deserialize_with_enum() {
assert_de_tokens(
&DeserializeWithEnum::Struct { a: 1, b: 2 },
&[
Token::StructVariant {
name: "DeserializeWithEnum",
variant: "Struct",
len: 2,
},
Token::Str("a"),
Token::I8(1),
Token::Str("b"),
Token::Bool(false),
Token::StructVariantEnd,
],
);
assert_de_tokens(
&DeserializeWithEnum::Struct { a: 1, b: 123 },
&[
Token::StructVariant {
name: "DeserializeWithEnum",
variant: "Struct",
len: 2,
},
Token::Str("a"),
Token::I8(1),
Token::Str("b"),
Token::Bool(true),
Token::StructVariantEnd,
],
);
}
#[test]
fn test_missing_renamed_field_struct() {
assert_de_tokens_error::<RenameStruct>(
&[
Token::Struct {
name: "Superhero",
len: 2,
},
Token::Str("a1"),
Token::I32(1),
Token::StructEnd,
],
"missing field `a3`",
);
assert_de_tokens_error::<RenameStructSerializeDeserialize>(
&[
Token::Struct {
name: "SuperheroDe",
len: 2,
},
Token::Str("a1"),
Token::I32(1),
Token::StructEnd,
],
"missing field `a5`",
);
}
#[test]
fn test_missing_renamed_field_enum() {
assert_de_tokens_error::<RenameEnum>(
&[
Token::StructVariant {
name: "Superhero",
variant: "barry_allan",
len: 1,
},
Token::StructVariantEnd,
],
"missing field `b`",
);
assert_de_tokens_error::<RenameEnumSerializeDeserialize<i8>>(
&[
Token::StructVariant {
name: "SuperheroDe",
variant: "jason_todd",
len: 2,
},
Token::Str("a"),
Token::I8(0),
Token::StructVariantEnd,
],
"missing field `d`",
);
}
#[derive(Debug, PartialEq, Deserialize)]
enum InvalidLengthEnum {
A(i32, i32, i32),
B(
#[serde(skip_deserializing)]
i32,
i32,
i32,
),
}
#[test]
fn test_invalid_length_enum() {
assert_de_tokens_error::<InvalidLengthEnum>(
&[
Token::TupleVariant {
name: "InvalidLengthEnum",
variant: "A",
len: 3,
},
Token::I32(1),
Token::TupleVariantEnd,
],
"invalid length 1, expected tuple of 3 elements",
);
assert_de_tokens_error::<InvalidLengthEnum>(
&[
Token::TupleVariant {
name: "InvalidLengthEnum",
variant: "B",
len: 3,
},
Token::I32(1),
Token::TupleVariantEnd,
],
"invalid length 1, expected tuple of 2 elements",
);
}
#[derive(Clone, Serialize, Deserialize, PartialEq, Debug)]
#[serde(into = "EnumToU32", from = "EnumToU32")]
struct StructFromEnum(Option<u32>);
impl Into<EnumToU32> for StructFromEnum {
fn into(self) -> EnumToU32 {
match self {
StructFromEnum(v) => v.into(),
}
}
}
impl From<EnumToU32> for StructFromEnum {
fn from(v: EnumToU32) -> Self {
StructFromEnum(v.into())
}
}
#[derive(Clone, Serialize, Deserialize, PartialEq, Debug)]
#[serde(into = "Option<u32>", from = "Option<u32>")]
enum EnumToU32 {
One,
Two,
Three,
Four,
Nothing,
}
impl Into<Option<u32>> for EnumToU32 {
fn into(self) -> Option<u32> {
match self {
EnumToU32::One => Some(1),
EnumToU32::Two => Some(2),
EnumToU32::Three => Some(3),
EnumToU32::Four => Some(4),
EnumToU32::Nothing => None,
}
}
}
impl From<Option<u32>> for EnumToU32 {
fn from(v: Option<u32>) -> Self {
match v {
Some(1) => EnumToU32::One,
Some(2) => EnumToU32::Two,
Some(3) => EnumToU32::Three,
Some(4) => EnumToU32::Four,
_ => EnumToU32::Nothing,
}
}
}
#[test]
fn test_from_into_traits() {
assert_ser_tokens::<EnumToU32>(&EnumToU32::One, &[Token::Some, Token::U32(1)]);
assert_ser_tokens::<EnumToU32>(&EnumToU32::Nothing, &[Token::None]);
assert_de_tokens::<EnumToU32>(&EnumToU32::Two, &[Token::Some, Token::U32(2)]);
assert_ser_tokens::<StructFromEnum>(&StructFromEnum(Some(5)), &[Token::None]);
assert_ser_tokens::<StructFromEnum>(&StructFromEnum(None), &[Token::None]);
assert_de_tokens::<StructFromEnum>(&StructFromEnum(Some(2)), &[Token::Some, Token::U32(2)]);
}
#[test]
fn test_collect_other() {
let mut extra = HashMap::new();
extra.insert("c".into(), 3);
assert_tokens(
&CollectOther { a: 1, b: 2, extra },
&[
Token::Map { len: None },
Token::Str("a"),
Token::U32(1),
Token::Str("b"),
Token::U32(2),
Token::Str("c"),
Token::U32(3),
Token::MapEnd,
],
);
}
#[test]
fn test_flatten_struct_enum() {
let mut extra = HashMap::new();
extra.insert("extra_key".into(), "extra value".into());
let change_request = FlattenStructEnumWrapper {
data: FlattenStructEnum::InsertInteger {
index: 0,
value: 42
},
extra,
};
assert_de_tokens(
&change_request,
&[
Token::Map { len: None },
Token::Str("insert_integer"),
Token::Map { len: None },
Token::Str("index"),
Token::U32(0),
Token::Str("value"),
Token::U32(42),
Token::MapEnd,
Token::Str("extra_key"),
Token::Str("extra value"),
Token::MapEnd
],
);
assert_ser_tokens(
&change_request,
&[
Token::Map { len: None },
Token::Str("insert_integer"),
Token::Struct { len: 2, name: "insert_integer" },
Token::Str("index"),
Token::U32(0),
Token::Str("value"),
Token::U32(42),
Token::StructEnd,
Token::Str("extra_key"),
Token::Str("extra value"),
Token::MapEnd
],
);
}
#[test]
fn test_flatten_struct_tag_content_enum() {
let change_request = FlattenStructTagContentEnumWrapper {
outer: 42,
data: FlattenStructTagContentEnumNewtype(
FlattenStructTagContentEnum::InsertInteger {
index: 0,
value: 42
}
),
};
assert_de_tokens(
&change_request,
&[
Token::Map { len: None },
Token::Str("outer"),
Token::U32(42),
Token::Str("type"),
Token::Str("insert_integer"),
Token::Str("value"),
Token::Map { len: None },
Token::Str("index"),
Token::U32(0),
Token::Str("value"),
Token::U32(42),
Token::MapEnd,
Token::MapEnd,
],
);
assert_ser_tokens(
&change_request,
&[
Token::Map { len: None },
Token::Str("outer"),
Token::U32(42),
Token::Str("type"),
Token::Str("insert_integer"),
Token::Str("value"),
Token::Struct { len: 2, name: "insert_integer" },
Token::Str("index"),
Token::U32(0),
Token::Str("value"),
Token::U32(42),
Token::StructEnd,
Token::MapEnd,
],
);
}
#[test]
fn test_flatten_struct_tag_content_enum_newtype() {
let change_request = FlattenStructTagContentEnumWrapper {
outer: 42,
data: FlattenStructTagContentEnumNewtype(
FlattenStructTagContentEnum::NewtypeVariant(
FlattenStructTagContentEnumNewtypeVariant {
value: 23
}
)
),
};
assert_de_tokens(
&change_request,
&[
Token::Map { len: None },
Token::Str("outer"),
Token::U32(42),
Token::Str("type"),
Token::Str("newtype_variant"),
Token::Str("value"),
Token::Map { len: None },
Token::Str("value"),
Token::U32(23),
Token::MapEnd,
Token::MapEnd,
],
);
assert_ser_tokens(
&change_request,
&[
Token::Map { len: None },
Token::Str("outer"),
Token::U32(42),
Token::Str("type"),
Token::Str("newtype_variant"),
Token::Str("value"),
Token::Struct { len: 1, name: "FlattenStructTagContentEnumNewtypeVariant" },
Token::Str("value"),
Token::U32(23),
Token::StructEnd,
Token::MapEnd,
],
);
}
#[test]
fn test_unknown_field_in_flatten() {
#[derive(Debug, PartialEq, Serialize, Deserialize)]
#[serde(deny_unknown_fields)]
struct Outer {
dummy: String,
#[serde(flatten)]
inner: Inner,
}
#[derive(Debug, PartialEq, Serialize, Deserialize)]
struct Inner {
foo: HashMap<String, u32>,
}
assert_de_tokens_error::<Outer>(
&[
Token::Struct {
name: "Outer",
len: 1,
},
Token::Str("dummy"),
Token::Str("23"),
Token::Str("foo"),
Token::Map { len: None },
Token::Str("a"),
Token::U32(1),
Token::Str("b"),
Token::U32(2),
Token::MapEnd,
Token::Str("bar"),
Token::U32(23),
Token::StructEnd,
],
"unknown field `bar`",
);
}
#[test]
fn test_complex_flatten() {
#[derive(Debug, PartialEq, Serialize, Deserialize)]
struct Outer {
y: u32,
#[serde(flatten)]
first: First,
#[serde(flatten)]
second: Second,
z: u32
}
#[derive(Debug, PartialEq, Serialize, Deserialize)]
struct First {
a: u32,
b: bool,
c: Vec<String>,
d: String,
e: Option<u64>,
}
#[derive(Debug, PartialEq, Serialize, Deserialize)]
struct Second {
f: u32,
}
assert_de_tokens(
&Outer {
y: 0,
first: First {
a: 1,
b: true,
c: vec!["a".into(), "b".into()],
d: "c".into(),
e: Some(2),
},
second: Second {
f: 3
},
z: 4
},
&[
Token::Map { len: None },
Token::Str("y"),
Token::U32(0),
Token::Str("a"),
Token::U32(1),
Token::Str("b"),
Token::Bool(true),
Token::Str("c"),
Token::Seq { len: Some(2) },
Token::Str("a"),
Token::Str("b"),
Token::SeqEnd,
Token::Str("d"),
Token::Str("c"),
Token::Str("e"),
Token::U64(2),
Token::Str("f"),
Token::U32(3),
Token::Str("z"),
Token::U32(4),
Token::MapEnd,
],
);
assert_ser_tokens(
&Outer {
y: 0,
first: First {
a: 1,
b: true,
c: vec!["a".into(), "b".into()],
d: "c".into(),
e: Some(2),
},
second: Second {
f: 3
},
z: 4
},
&[
Token::Map { len: None },
Token::Str("y"),
Token::U32(0),
Token::Str("a"),
Token::U32(1),
Token::Str("b"),
Token::Bool(true),
Token::Str("c"),
Token::Seq { len: Some(2) },
Token::Str("a"),
Token::Str("b"),
Token::SeqEnd,
Token::Str("d"),
Token::Str("c"),
Token::Str("e"),
Token::Some,
Token::U64(2),
Token::Str("f"),
Token::U32(3),
Token::Str("z"),
Token::U32(4),
Token::MapEnd,
],
);
}
#[test]
fn test_flatten_unsupported_type() {
#[derive(Debug, PartialEq, Serialize, Deserialize)]
struct Outer {
outer: String,
#[serde(flatten)]
inner: String,
}
assert_ser_tokens_error(
&Outer {
outer: "foo".into(),
inner: "bar".into(),
},
&[
Token::Map { len: None },
Token::Str("outer"),
Token::Str("foo"),
],
"can only flatten structs and maps (got a string)",
);
assert_de_tokens_error::<Outer>(
&[
Token::Map { len: None },
Token::Str("outer"),
Token::Str("foo"),
Token::Str("a"),
Token::Str("b"),
Token::MapEnd
],
"can only flatten structs and maps",
);
}
#[test]
fn test_non_string_keys() {
#[derive(Debug, PartialEq, Serialize, Deserialize)]
struct TestStruct {
name: String,
age: u32,
#[serde(flatten)]
mapping: HashMap<u32, u32>,
}
let mut mapping = HashMap::new();
mapping.insert(0, 42);
assert_tokens(
&TestStruct { name: "peter".into(), age: 3, mapping },
&[
Token::Map { len: None },
Token::Str("name"),
Token::Str("peter"),
Token::Str("age"),
Token::U32(3),
Token::U32(0),
Token::U32(42),
Token::MapEnd,
],
);
}
#[test]
fn test_lifetime_propagation_for_flatten() {
#[derive(Deserialize, Serialize, Debug, PartialEq)]
struct A<T> {
#[serde(flatten)]
t: T,
}
#[derive(Deserialize, Serialize, Debug, PartialEq)]
struct B<'a> {
#[serde(flatten, borrow)]
t: HashMap<&'a str, u32>,
}
#[derive(Deserialize, Serialize, Debug, PartialEq)]
struct C<'a> {
#[serde(flatten, borrow)]
t: HashMap<&'a [u8], u32>,
}
let mut owned_map = HashMap::new();
owned_map.insert("x".to_string(), 42u32);
assert_tokens(
&A { t: owned_map },
&[
Token::Map { len: None },
Token::Str("x"),
Token::U32(42),
Token::MapEnd,
],
);
let mut borrowed_map = HashMap::new();
borrowed_map.insert("x", 42u32);
assert_ser_tokens(
&B { t: borrowed_map.clone() },
&[
Token::Map { len: None },
Token::BorrowedStr("x"),
Token::U32(42),
Token::MapEnd,
],
);
assert_de_tokens(
&B { t: borrowed_map },
&[
Token::Map { len: None },
Token::BorrowedStr("x"),
Token::U32(42),
Token::MapEnd,
],
);
let mut borrowed_map = HashMap::new();
borrowed_map.insert(&b"x"[..], 42u32);
assert_ser_tokens(
&C { t: borrowed_map.clone() },
&[
Token::Map { len: None },
Token::Seq { len: Some(1) },
Token::U8(120),
Token::SeqEnd,
Token::U32(42),
Token::MapEnd,
],
);
assert_de_tokens(
&C { t: borrowed_map },
&[
Token::Map { len: None },
Token::BorrowedBytes(b"x"),
Token::U32(42),
Token::MapEnd,
],
);
}