88 lines
2.3 KiB
Rust
88 lines
2.3 KiB
Rust
// Copyright 2015, 2016 Ethcore (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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//! Lenient bytes json deserialization for test json files.
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use rustc_serialize::hex::FromHex;
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use serde::{Deserialize, Deserializer, Error};
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use serde::de::Visitor;
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/// Lenient bytes json deserialization for test json files.
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#[derive(Default, Debug, PartialEq)]
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pub struct Bytes(Vec<u8>);
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impl Into<Vec<u8>> for Bytes {
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fn into(self) -> Vec<u8> {
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self.0
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}
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}
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impl Deserialize for Bytes {
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fn deserialize<D>(deserializer: &mut D) -> Result<Self, D::Error>
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where D: Deserializer {
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deserializer.deserialize(BytesVisitor)
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}
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}
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struct BytesVisitor;
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impl Visitor for BytesVisitor {
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type Value = Bytes;
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fn visit_str<E>(&mut self, value: &str) -> Result<Self::Value, E> where E: Error {
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let v = match value.len() {
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0 => vec![],
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2 if value.starts_with("0x") => vec![],
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_ if value.starts_with("0x") => try!(FromHex::from_hex(&value[2..]).map_err(|_| {
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Error::custom(format!("Invalid hex value {}.", value).as_ref())
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})),
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_ => try!(FromHex::from_hex(value).map_err(|_| {
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Error::custom(format!("Invalid hex value {}.", value).as_ref())
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}))
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};
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Ok(Bytes(v))
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}
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fn visit_string<E>(&mut self, value: String) -> Result<Self::Value, E> where E: Error {
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self.visit_str(value.as_ref())
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}
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}
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#[cfg(test)]
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mod test {
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use serde_json;
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use bytes::Bytes;
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#[test]
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fn bytes_deserialization() {
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let s = r#"["", "0x", "0x12", "1234"]"#;
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let deserialized: Vec<Bytes> = serde_json::from_str(s).unwrap();
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assert_eq!(deserialized, vec![
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Bytes(vec![]),
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Bytes(vec![]),
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Bytes(vec![0x12]),
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Bytes(vec![0x12, 0x34])
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]);
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}
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#[test]
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fn bytes_into() {
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let bytes = Bytes(vec![0xff, 0x11]);
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let v: Vec<u8> = bytes.into();
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assert_eq!(vec![0xff, 0x11], v);
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}
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}
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