82 lines
2.2 KiB
Rust
82 lines
2.2 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 hash json deserialization for test json files.
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use std::str::FromStr;
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use serde::{Deserialize, Deserializer, Error};
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use serde::de::Visitor;
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use util::hash::H256;
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/// Lenient hash json deserialization for test json files.
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#[derive(Default, Debug, PartialEq, Eq, Hash, PartialOrd, Ord)]
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pub struct Hash(H256);
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impl Into<H256> for Hash {
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fn into(self) -> H256 {
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self.0
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}
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}
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impl Deserialize for Hash {
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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(HashVisitor)
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}
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}
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struct HashVisitor;
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impl Visitor for HashVisitor {
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type Value = Hash;
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fn visit_str<E>(&mut self, value: &str) -> Result<Self::Value, E> where E: Error {
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let value = match value.len() {
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0 => H256::from(0),
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_ => try!(H256::from_str(value).map_err(|_| Error::custom("invalid hex value.")))
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};
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Ok(Hash(value))
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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 std::str::FromStr;
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use serde_json;
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use util::hash::H256;
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use hash::Hash;
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#[test]
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fn uint_deserialization() {
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let s = r#"["", "5a39ed1020c04d4d84539975b893a4e7c53eab6c2965db8bc3468093a31bc5ae"]"#;
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let deserialized: Vec<Hash> = serde_json::from_str(s).unwrap();
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assert_eq!(deserialized, vec![
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Hash(H256::from(0)),
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Hash(H256::from_str("5a39ed1020c04d4d84539975b893a4e7c53eab6c2965db8bc3468093a31bc5ae").unwrap())
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]);
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}
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#[test]
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fn uint_into() {
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assert_eq!(H256::from(0), Hash(H256::from(0)).into());
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}
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}
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