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Improve assert_ser_tokens error messages

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This commit is contained in:
David Tolnay 2017-04-05 01:06:42 -07:00
parent 93860d0643
commit afaab12b66
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1 changed files with 59 additions and 51 deletions
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110
serde_test/src/ser.rs
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@ -17,8 +17,8 @@ impl<'a> Serializer<'a> {
}
/// Pulls the next token off of the serializer, ignoring it.
pub fn next_token(&mut self) -> Option<&Token> {
if let Some((first, rest)) = self.tokens.split_first() {
pub fn next_token(&mut self) -> Option<Token> {
if let Some((&first, rest)) = self.tokens.split_first() {
self.tokens = rest;
Some(first)
} else {
@ -28,17 +28,28 @@ impl<'a> Serializer<'a> {
}
macro_rules! assert_next_token {
($self:ident, $expected:ident($arg:expr)) => {
($self:ident, $expected:ident($a:expr)) => {
assert_next_token!($self, $expected { a: $a });
};
($self:ident, $expected:ident($a:expr, $b:expr)) => {
assert_next_token!($self, $expected { a: $a, b: $b });
};
($self:ident, $expected:ident($a:expr, $b:expr, $c:expr)) => {
assert_next_token!($self, $expected { a: $a, b: $b, c: $c });
};
($self:ident, $expected:ident $({ $($n:ident: $v:expr),* })*) => {
match $self.next_token() {
Some(&Token::$expected(v)) if v == $arg => {}
Some(Token::$expected $(($($n),*))*) $(if $($n == $v)&&*)* => {}
Some(other) => {
panic!("expected {}({:?}) but serialized as {:?}", stringify!($expected), $arg, other);
panic!("expected Token::{} but serialized as {:?}",
stringify!($expected), other);
}
None => {
panic!("expected {}({:?}) after end of serialized tokens", stringify!($expected), $arg);
panic!("expected Token::{} after end of serialized tokens",
stringify!($expected));
}
}
}
};
}
impl<'s, 'a> ser::Serializer for &'s mut Serializer<'a> {
@ -54,62 +65,62 @@ impl<'s, 'a> ser::Serializer for &'s mut Serializer<'a> {
type SerializeStructVariant = Self;
fn serialize_bool(self, v: bool) -> Result<(), Error> {
assert_eq!(self.next_token(), Some(&Token::Bool(v)));
assert_next_token!(self, Bool(v));
Ok(())
}
fn serialize_i8(self, v: i8) -> Result<(), Error> {
assert_eq!(self.next_token(), Some(&Token::I8(v)));
assert_next_token!(self, I8(v));
Ok(())
}
fn serialize_i16(self, v: i16) -> Result<(), Error> {
assert_eq!(self.next_token(), Some(&Token::I16(v)));
assert_next_token!(self, I16(v));
Ok(())
}
fn serialize_i32(self, v: i32) -> Result<(), Error> {
assert_eq!(self.next_token(), Some(&Token::I32(v)));
assert_next_token!(self, I32(v));
Ok(())
}
fn serialize_i64(self, v: i64) -> Result<(), Error> {
assert_eq!(self.next_token(), Some(&Token::I64(v)));
assert_next_token!(self, I64(v));
Ok(())
}
fn serialize_u8(self, v: u8) -> Result<(), Error> {
assert_eq!(self.next_token(), Some(&Token::U8(v)));
assert_next_token!(self, U8(v));
Ok(())
}
fn serialize_u16(self, v: u16) -> Result<(), Error> {
assert_eq!(self.next_token(), Some(&Token::U16(v)));
assert_next_token!(self, U16(v));
Ok(())
}
fn serialize_u32(self, v: u32) -> Result<(), Error> {
assert_eq!(self.next_token(), Some(&Token::U32(v)));
assert_next_token!(self, U32(v));
Ok(())
}
fn serialize_u64(self, v: u64) -> Result<(), Error> {
assert_eq!(self.next_token(), Some(&Token::U64(v)));
assert_next_token!(self, U64(v));
Ok(())
}
fn serialize_f32(self, v: f32) -> Result<(), Error> {
assert_eq!(self.next_token(), Some(&Token::F32(v)));
assert_next_token!(self, F32(v));
Ok(())
}
fn serialize_f64(self, v: f64) -> Result<(), Error> {
assert_eq!(self.next_token(), Some(&Token::F64(v)));
assert_next_token!(self, F64(v));
Ok(())
}
fn serialize_char(self, v: char) -> Result<(), Error> {
assert_eq!(self.next_token(), Some(&Token::Char(v)));
assert_next_token!(self, Char(v));
Ok(())
}
@ -124,12 +135,12 @@ impl<'s, 'a> ser::Serializer for &'s mut Serializer<'a> {
}
fn serialize_unit(self) -> Result<(), Error> {
assert_eq!(self.next_token(), Some(&Token::Unit));
assert_next_token!(self, Unit);
Ok(())
}
fn serialize_unit_struct(self, name: &'static str) -> Result<(), Error> {
assert_eq!(self.next_token(), Some(&Token::UnitStruct(name)));
assert_next_token!(self, UnitStruct(name));
Ok(())
}
@ -138,14 +149,14 @@ impl<'s, 'a> ser::Serializer for &'s mut Serializer<'a> {
_variant_index: usize,
variant: &'static str)
-> Result<(), Error> {
assert_eq!(self.next_token(), Some(&Token::EnumUnit(name, variant)));
assert_next_token!(self, EnumUnit(name, variant));
Ok(())
}
fn serialize_newtype_struct<T: ?Sized>(self, name: &'static str, value: &T) -> Result<(), Error>
where T: Serialize
{
assert_eq!(self.next_token(), Some(&Token::StructNewType(name)));
assert_next_token!(self, StructNewType(name));
value.serialize(self)
}
@ -157,40 +168,39 @@ impl<'s, 'a> ser::Serializer for &'s mut Serializer<'a> {
-> Result<(), Error>
where T: Serialize
{
assert_eq!(self.next_token(), Some(&Token::EnumNewType(name, variant)));
assert_next_token!(self, EnumNewType(name, variant));
value.serialize(self)
}
fn serialize_none(self) -> Result<(), Error> {
assert_eq!(self.next_token(), Some(&Token::Option(false)));
assert_next_token!(self, Option(false));
Ok(())
}
fn serialize_some<T: ?Sized>(self, value: &T) -> Result<(), Error>
where T: Serialize
{
assert_eq!(self.next_token(), Some(&Token::Option(true)));
assert_next_token!(self, Option(true));
value.serialize(self)
}
fn serialize_seq(self, len: Option<usize>) -> Result<Self, Error> {
assert_eq!(self.next_token(), Some(&Token::SeqStart(len)));
assert_next_token!(self, SeqStart(len));
Ok(self)
}
fn serialize_seq_fixed_size(self, len: usize) -> Result<Self, Error> {
assert_eq!(self.next_token(), Some(&Token::SeqArrayStart(len)));
assert_next_token!(self, SeqArrayStart(len));
Ok(self)
}
fn serialize_tuple(self, len: usize) -> Result<Self, Error> {
assert_eq!(self.next_token(), Some(&Token::TupleStart(len)));
assert_next_token!(self, TupleStart(len));
Ok(self)
}
fn serialize_tuple_struct(self, name: &'static str, len: usize) -> Result<Self, Error> {
assert_eq!(self.next_token(),
Some(&Token::TupleStructStart(name, len)));
assert_next_token!(self, TupleStructStart(name, len));
Ok(self)
}
@ -200,18 +210,17 @@ impl<'s, 'a> ser::Serializer for &'s mut Serializer<'a> {
variant: &'static str,
len: usize)
-> Result<Self, Error> {
assert_eq!(self.next_token(),
Some(&Token::EnumSeqStart(name, variant, len)));
assert_next_token!(self, EnumSeqStart(name, variant, len));
Ok(self)
}
fn serialize_map(self, len: Option<usize>) -> Result<Self, Error> {
assert_eq!(self.next_token(), Some(&Token::MapStart(len)));
assert_next_token!(self, MapStart(len));
Ok(self)
}
fn serialize_struct(self, name: &'static str, len: usize) -> Result<Self, Error> {
assert_eq!(self.next_token(), Some(&Token::StructStart(name, len)));
assert_next_token!(self, StructStart(name, len));
Ok(self)
}
@ -221,8 +230,7 @@ impl<'s, 'a> ser::Serializer for &'s mut Serializer<'a> {
variant: &'static str,
len: usize)
-> Result<Self, Error> {
assert_eq!(self.next_token(),
Some(&Token::EnumMapStart(name, variant, len)));
assert_next_token!(self, EnumMapStart(name, variant, len));
Ok(self)
}
}
@ -234,12 +242,12 @@ impl<'s, 'a> ser::SerializeSeq for &'s mut Serializer<'a> {
fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
where T: Serialize
{
assert_eq!(self.next_token(), Some(&Token::SeqSep));
assert_next_token!(self, SeqSep);
value.serialize(&mut **self)
}
fn end(self) -> Result<(), Error> {
assert_eq!(self.next_token(), Some(&Token::SeqEnd));
assert_next_token!(self, SeqEnd);
Ok(())
}
}
@ -251,12 +259,12 @@ impl<'s, 'a> ser::SerializeTuple for &'s mut Serializer<'a> {
fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
where T: Serialize
{
assert_eq!(self.next_token(), Some(&Token::TupleSep));
assert_next_token!(self, TupleSep);
value.serialize(&mut **self)
}
fn end(self) -> Result<(), Error> {
assert_eq!(self.next_token(), Some(&Token::TupleEnd));
assert_next_token!(self, TupleEnd);
Ok(())
}
}
@ -268,12 +276,12 @@ impl<'s, 'a> ser::SerializeTupleStruct for &'s mut Serializer<'a> {
fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
where T: Serialize
{
assert_eq!(self.next_token(), Some(&Token::TupleStructSep));
assert_next_token!(self, TupleStructSep);
value.serialize(&mut **self)
}
fn end(self) -> Result<(), Error> {
assert_eq!(self.next_token(), Some(&Token::TupleStructEnd));
assert_next_token!(self, TupleStructEnd);
Ok(())
}
}
@ -285,12 +293,12 @@ impl<'s, 'a> ser::SerializeTupleVariant for &'s mut Serializer<'a> {
fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
where T: Serialize
{
assert_eq!(self.next_token(), Some(&Token::EnumSeqSep));
assert_next_token!(self, EnumSeqSep);
value.serialize(&mut **self)
}
fn end(self) -> Result<(), Error> {
assert_eq!(self.next_token(), Some(&Token::EnumSeqEnd));
assert_next_token!(self, EnumSeqEnd);
Ok(())
}
}
@ -302,7 +310,7 @@ impl<'s, 'a> ser::SerializeMap for &'s mut Serializer<'a> {
fn serialize_key<T: ?Sized>(&mut self, key: &T) -> Result<(), Self::Error>
where T: Serialize
{
assert_eq!(self.next_token(), Some(&Token::MapSep));
assert_next_token!(self, MapSep);
key.serialize(&mut **self)
}
@ -313,7 +321,7 @@ impl<'s, 'a> ser::SerializeMap for &'s mut Serializer<'a> {
}
fn end(self) -> Result<(), Self::Error> {
assert_eq!(self.next_token(), Some(&Token::MapEnd));
assert_next_token!(self, MapEnd);
Ok(())
}
}
@ -328,13 +336,13 @@ impl<'s, 'a> ser::SerializeStruct for &'s mut Serializer<'a> {
-> Result<(), Self::Error>
where T: Serialize
{
assert_eq!(self.next_token(), Some(&Token::StructSep));
assert_next_token!(self, StructSep);
try!(key.serialize(&mut **self));
value.serialize(&mut **self)
}
fn end(self) -> Result<(), Self::Error> {
assert_eq!(self.next_token(), Some(&Token::StructEnd));
assert_next_token!(self, StructEnd);
Ok(())
}
}
@ -349,13 +357,13 @@ impl<'s, 'a> ser::SerializeStructVariant for &'s mut Serializer<'a> {
-> Result<(), Self::Error>
where T: Serialize
{
assert_eq!(self.next_token(), Some(&Token::EnumMapSep));
assert_next_token!(self, EnumMapSep);
try!(key.serialize(&mut **self));
value.serialize(&mut **self)
}
fn end(self) -> Result<(), Self::Error> {
assert_eq!(self.next_token(), Some(&Token::EnumMapEnd));
assert_next_token!(self, EnumMapEnd);
Ok(())
}
}