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use std::io::Cursor;
use serde::Deserialize;
use rmp_serde::decode::Error;
use rmp_serde::Deserializer;
#[test]
fn pass_newtype() {
let buf = [0x2a];
let cur = Cursor::new(&buf[..]);
#[derive(Debug, PartialEq, Deserialize)]
struct Struct(u32);
let mut de = Deserializer::new(cur);
let actual: Struct = Deserialize::deserialize(&mut de).unwrap();
assert_eq!(Struct(42), actual);
}
#[test]
fn pass_tuple_struct() {
let buf = [0x92, 0x2a, 0xce, 0x0, 0x1, 0x88, 0x94];
let cur = Cursor::new(&buf[..]);
#[derive(Debug, PartialEq, Deserialize)]
struct Decoded(u32, u32);
let mut de = Deserializer::new(cur);
let actual: Decoded = Deserialize::deserialize(&mut de).unwrap();
assert_eq!(Decoded(42, 100500), actual);
}
#[test]
fn pass_single_field_struct() {
let buf = [0x91, 0x2a];
let cur = Cursor::new(&buf[..]);
#[derive(Debug, PartialEq, Deserialize)]
struct Struct {
inner: u32,
}
let mut de = Deserializer::new(cur);
let actual: Struct = Deserialize::deserialize(&mut de).unwrap();
assert_eq!(Struct { inner: 42 }, actual);
}
#[test]
fn pass_struct() {
let buf = [0x92, 0x2a, 0xce, 0x0, 0x1, 0x88, 0x94];
let cur = Cursor::new(&buf[..]);
#[derive(Debug, PartialEq, Deserialize)]
struct Decoded {
id: u32,
value: u32,
}
let mut de = Deserializer::new(cur);
let actual: Decoded = Deserialize::deserialize(&mut de).unwrap();
assert_eq!(Decoded { id: 42, value: 100500 }, actual);
}
#[test]
fn pass_struct_from_map() {
#[derive(Debug, PartialEq, Deserialize)]
struct Struct {
et: String,
le: u8,
shit: u8,
}
let buf = [
0x83, // 3 (size)
0xa2, 0x65, 0x74, // "et"
0xa5, 0x76, 0x6f, 0x69, 0x6c, 0x61, // "voila"
0xa2, 0x6c, 0x65, // "le"
0x00, // 0
0xa4, 0x73, 0x68, 0x69, 0x74, // "shit"
0x01, // 1
];
let cur = Cursor::new(&buf[..]);
// It appears no special behavior is needed for deserializing structs encoded as maps.
let mut de = Deserializer::new(cur);
let actual: Struct = Deserialize::deserialize(&mut de).unwrap();
let expected = Struct { et: "voila".into(), le: 0, shit: 1 };
assert_eq!(expected, actual);
}
#[test]
fn pass_unit_variant() {
// We expect enums to be encoded as a map {variant_idx => nil}
let buf = [0x81, 0x0, 0xC0, 0x81, 0x1, 0xC0];
let cur = Cursor::new(&buf[..]);
#[derive(Debug, PartialEq, Deserialize)]
enum Enum {
A,
B,
}
let mut de = Deserializer::new(cur);
let enum_a = Enum::deserialize(&mut de).unwrap();
let enum_b = Enum::deserialize(&mut de).unwrap();
assert_eq!(enum_a, Enum::A);
assert_eq!(enum_b, Enum::B);
assert_eq!(6, de.get_ref().position());
}
#[test]
fn pass_tuple_enum_with_arg() {
// The encoded byte-array is: {1 => 42}.
let buf = [0x81, 0x01, 0x2a];
let cur = Cursor::new(&buf[..]);
#[derive(Debug, PartialEq, Deserialize)]
enum Enum {
A,
B(u32),
}
let mut de = Deserializer::new(cur);
let actual: Enum = Deserialize::deserialize(&mut de).unwrap();
assert_eq!(Enum::B(42), actual);
assert_eq!(3, de.get_ref().position());
}
#[test]
fn pass_tuple_enum_with_args() {
// The encoded bytearray is: {1 => [42, 58]}.
let buf = [0x81, 0x01, 0x92, 0x2a, 0x3a];
let cur = Cursor::new(&buf[..]);
#[derive(Debug, PartialEq, Deserialize)]
enum Enum {
A,
B(u32, u32),
}
let mut de = Deserializer::new(cur);
let actual: Enum = Deserialize::deserialize(&mut de).unwrap();
assert_eq!(Enum::B(42, 58), actual);
assert_eq!(5, de.get_ref().position());
}
#[test]
fn fail_enum_map_mismatch() {
let buf = [0x82, 0x0, 0x24, 0x1, 0x25];
#[derive(Debug, PartialEq, Deserialize)]
enum Enum {
A(i32),
}
let err: Result<Enum, _> = rmp_serde::from_slice(&buf);
match err.unwrap_err() {
Error::LengthMismatch(2) => (),
other => panic!("unexpected result: {other:?}"),
}
}
#[test]
fn fail_enum_overflow() {
// The encoded bytearray is: {1 => [42]}.
let buf = [0x81, 0x01, 0x2a];
let cur = Cursor::new(&buf[..]);
#[derive(Debug, PartialEq, Deserialize)]
// TODO: Rename to Enum: A, B, C, ...
enum Enum {
A,
}
let mut de = Deserializer::new(cur);
let actual: Result<Enum, Error> = Deserialize::deserialize(&mut de);
match actual.err().unwrap() {
Error::Syntax(..) => (),
other => panic!("unexpected result: {other:?}"),
}
}
#[test]
fn pass_struct_enum_with_arg() {
// The encoded bytearray is: {1 => [42]}.
let buf = [0x81, 0x01, 0x91, 0x2a];
let cur = Cursor::new(&buf[..]);
#[derive(Debug, PartialEq, Deserialize)]
enum Enum {
A,
B { id: u32 },
}
let mut de = Deserializer::new(cur);
let actual: Enum = Deserialize::deserialize(&mut de).unwrap();
assert_eq!(Enum::B { id: 42 }, actual);
assert_eq!(4, de.get_ref().position());
}
#[test]
fn pass_newtype_variant() {
// The encoded bytearray is: {0 => 'le message'}.
let buf = [0x81, 0x0, 0xaa, 0x6c, 0x65, 0x20, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65];
let cur = Cursor::new(&buf[..]);
#[derive(Debug, PartialEq, Deserialize)]
struct Newtype(String);
#[derive(Debug, PartialEq, Deserialize)]
enum Enum {
A(Newtype),
}
let mut de = Deserializer::new(cur);
let actual: Enum = Deserialize::deserialize(&mut de).unwrap();
assert_eq!(Enum::A(Newtype("le message".into())), actual);
assert_eq!(buf.len() as u64, de.get_ref().position());
}
#[cfg(disabled)] // This test doesn't actually compile anymore
#[test]
fn pass_enum_custom_policy() {
use rmp_serde::decode::VariantVisitor;
use std::io::Read;
// We expect enums to be endoded as id, [...] (without wrapping tuple).
let buf = [0x01, 0x90];
let cur = Cursor::new(&buf[..]);
#[derive(Debug, PartialEq, Deserialize)]
enum Enum {
A,
B,
}
struct CustomDeserializer<R: Read> {
inner: Deserializer<R>,
}
impl<R: Read> serde::Deserializer for CustomDeserializer<R> {
type Error = Error;
fn deserialize<V>(&mut self, visitor: V) -> Result<V::Value, Error>
where V: serde::de::Visitor
{
self.inner.deserialize(visitor)
}
fn deserialize_enum<V>(&mut self, _enum: &str, _variants: &'static [&'static str], mut visitor: V)
-> Result<V::Value, Error>
where V: serde::de::EnumVisitor
{
visitor.visit(VariantVisitor::new(&mut self.inner))
}
forward_to_deserialize! {
bool usize u8 u16 u32 u64 isize i8 i16 i32 i64 f32 f64 char str string unit seq
seq_fixed_size bytes map tuple_struct unit_struct struct struct_field
tuple option newtype_struct ignored_any
}
}
let mut de = CustomDeserializer {
inner: Deserializer::new(cur),
};
let actual: Enum = Deserialize::deserialize(&mut de).unwrap();
assert_eq!(Enum::B, actual);
assert_eq!(2, de.inner.get_ref().position());
}
#[test]
fn pass_struct_variant() {
#[derive(Debug, PartialEq, Deserialize)]
enum Custom {
First { data: u32 },
Second { data: u32 },
}
let out_first = vec![0x81, 0x00, 0x91, 0x2a];
let out_second = vec![0x81, 0x01, 0x91, 0x2a];
for (expected, out) in [(Custom::First{ data: 42 }, out_first), (Custom::Second { data: 42 }, out_second)] {
let mut de = Deserializer::new(Cursor::new(&out[..]));
let val: Custom = Deserialize::deserialize(&mut de).unwrap();
assert_eq!(expected, val);
}
}
#[test]
fn pass_adjacently_tagged_enum() {
// ["Foo", 123]
let buf = [146, 163, 70, 111, 111, 123];
let cur = Cursor::new(&buf[..]);
#[derive(Debug, PartialEq, Deserialize)]
#[serde(tag = "t", content = "c")]
enum Enum {
Foo(i32),
Bar(u32),
}
let mut de = Deserializer::new(cur);
let actual = Deserialize::deserialize(&mut de);
assert!(actual.is_ok());
assert_eq!(Enum::Foo(123), actual.unwrap());
}
#[test]
#[should_panic(expected = "assertion failed")]
fn fail_internally_tagged_enum_tuple() {
// ["Foo", 123]
let buf = [146, 163, 70, 111, 111, 123];
let cur = Cursor::new(&buf[..]);
#[derive(Debug, PartialEq, Deserialize)]
#[serde(tag = "t")]
enum Enum {
Foo(i32),
Bar(u32),
}
let mut de = Deserializer::new(cur);
let actual: Result<Enum, Error> = Deserialize::deserialize(&mut de);
assert!(actual.is_ok());
}
#[test]
fn pass_internally_tagged_enum_struct() {
let buf = [130, 161, 116, 163, 70, 111, 111, 165, 118, 97, 108, 117, 101, 123];
let cur = Cursor::new(&buf[..]);
#[derive(Debug, PartialEq, Deserialize)]
#[serde(tag = "t")]
enum Enum {
Foo { value: i32 },
Bar { value: u32 },
}
let mut de = Deserializer::new(cur);
let actual: Result<Enum, Error> = Deserialize::deserialize(&mut de);
assert!(actual.is_ok());
assert_eq!(Enum::Foo { value: 123 }, actual.unwrap());
}
#[test]
fn pass_enum_with_one_arg() {
// The encoded bytearray is: {0 => [1, 2]}.
let buf = [0x81, 0x0, 0x92, 0x01, 0x02];
let cur = Cursor::new(&buf[..]);
#[derive(Debug, PartialEq, Deserialize)]
enum Enum {
V1(Vec<u32>),
}
let mut de = Deserializer::new(cur);
let actual: Enum = Deserialize::deserialize(&mut de).unwrap();
assert_eq!(Enum::V1(vec![1, 2]), actual);
assert_eq!(buf.len() as u64, de.get_ref().position());
}
#[test]
fn pass_struct_with_nested_options() {
// The encoded bytearray is: [null, 13].
let buf = [0x92, 0xc0, 0x0D];
let cur = Cursor::new(&buf[..]);
#[derive(Debug, PartialEq, Deserialize)]
struct Struct {
f1: Option<Option<u32>>,
f2: Option<Option<u32>>,
}
let mut de = Deserializer::new(cur);
let actual: Struct = Deserialize::deserialize(&mut de).unwrap();
assert_eq!(Struct { f1: None, f2: Some(Some(13)) }, actual);
assert_eq!(buf.len() as u64, de.get_ref().position());
}
#[test]
fn pass_struct_with_flattened_map_field() {
use std::collections::BTreeMap;
// The encoded bytearray is: { "f1": 0, "f2": { "german": "Hallo Welt!" }, "english": "Hello World!" }.
let buf = [
0x83, 0xA2, 0x66, 0x31, 0x00, 0xA2, 0x66, 0x32, 0x81, 0xA6, 0x67, 0x65, 0x72, 0x6D, 0x61, 0x6E, 0xAB,
0x48, 0x61, 0x6C, 0x6C, 0x6F, 0x20, 0x57, 0x65, 0x6C, 0x74, 0x21, 0xA7, 0x65, 0x6E, 0x67, 0x6C, 0x69,
0x73, 0x68, 0xAC, 0x48, 0x65, 0x6C, 0x6C, 0x6F, 0x20, 0x57, 0x6F, 0x72, 0x6C, 0x64, 0x21,
];
let cur = Cursor::new(&buf[..]);
#[derive(Debug, PartialEq, Deserialize)]
struct Struct {
f1: u32,
// not flattend!
f2: BTreeMap<String, String>,
#[serde(flatten)]
f3: BTreeMap<String, String>,
}
let expected = Struct {
f1: 0,
f2: {
let mut map = BTreeMap::new();
map.insert("german".to_string(), "Hallo Welt!".to_string());
map
},
f3: {
let mut map = BTreeMap::new();
map.insert("english".to_string(), "Hello World!".to_string());
map
},
};
let mut de = Deserializer::new(cur);
let actual: Struct = Deserialize::deserialize(&mut de).unwrap();
assert_eq!(expected, actual);
assert_eq!(buf.len() as u64, de.get_ref().position());
}
#[test]
fn pass_struct_with_flattened_struct_field() {
#[derive(Debug, PartialEq, Deserialize)]
struct Struct {
f1: u32,
// not flattend!
f2: InnerStruct,
#[serde(flatten)]
f3: InnerStruct,
}
#[derive(Debug, PartialEq, Deserialize)]
struct InnerStruct {
f4: u32,
f5: u32,
}
let expected = Struct {
f1: 0,
f2: InnerStruct { f4: 8, f5: 13 },
f3: InnerStruct { f4: 21, f5: 34 },
};
// struct-as-tuple
{
// The encoded bytearray is: { "f1": 0, "f2": [8, 13], "f4": 21, "f5": 34 }.
let buf = [
0x84, 0xA2, 0x66, 0x31, 0x00, 0xA2, 0x66, 0x32, 0x92, 0x08, 0x0D, 0xA2, 0x66, 0x34, 0x15, 0xA2, 0x66, 0x35,
0x22,
];
let cur = Cursor::new(&buf[..]);
let mut de = Deserializer::new(cur);
let actual: Struct = Deserialize::deserialize(&mut de).unwrap();
assert_eq!(expected, actual);
assert_eq!(buf.len() as u64, de.get_ref().position());
}
// struct-as-map
{
// The encoded bytearray is: { "f1": 0, "f2": { "f4": 8, "f5": 13 }, "f4": 21, "f5": 34 }.
let buf = [
0x84, 0xA2, 0x66, 0x31, 0x00, 0xA2, 0x66, 0x32, 0x82, 0xA2, 0x66, 0x34, 0x08,
0xA2, 0x66, 0x35, 0x0D, 0xA2, 0x66, 0x34, 0x15, 0xA2, 0x66, 0x35, 0x22,
];
let cur = Cursor::new(&buf[..]);
let mut de = Deserializer::new(cur);
let actual: Struct = Deserialize::deserialize(&mut de).unwrap();
assert_eq!(expected, actual);
assert_eq!(buf.len() as u64, de.get_ref().position());
}
}
#[test]
fn pass_from_slice() {
let buf = [0x93, 0xa4, 0x4a, 0x6f, 0x68, 0x6e, 0xa5, 0x53, 0x6d, 0x69, 0x74, 0x68, 0x2a];
#[derive(Debug, PartialEq, Deserialize)]
struct Person<'a> {
name: &'a str,
surname: &'a str,
age: u8,
}
assert_eq!(Person { name: "John", surname: "Smith", age: 42 }, rmp_serde::from_slice(&buf[..]).unwrap());
}
#[test]
#[allow(deprecated)]
fn pass_from_ref() {
let buf = [0x92, 0xa5, 0x42, 0x6f, 0x62, 0x62, 0x79, 0x8];
#[derive(Debug, Deserialize, PartialEq)]
struct Dog<'a> {
name: &'a str,
age: u8,
}
assert_eq!(Dog { name: "Bobby", age: 8 }, rmp_serde::from_read_ref(&buf).unwrap());
}