More fixes around unversioned v0, more tests, move tests to separate file
This commit is contained in:
parent
14fd399403
commit
b8d31b77d9
3 changed files with 444 additions and 342 deletions
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@ -1,6 +1,6 @@
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[package]
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name = "jsondb"
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version = "0.3.2"
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version = "0.4.0"
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edition = "2021"
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authors = ["xenofem <xenofem@xeno.science>"]
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license = "MIT"
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372
src/lib.rs
372
src/lib.rs
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@ -37,6 +37,9 @@ use tokio::{
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sync::{mpsc, oneshot, OwnedRwLockReadGuard, OwnedRwLockWriteGuard, RwLock},
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};
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#[cfg(test)]
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mod tests;
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/// A JSON-backed “““database”””.
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///
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/// This wraps a value that is loaded from a JSON file, automatically
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@ -64,14 +67,27 @@ enum Request<T> {
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/// other fields of the corresponding schema version; earlier versions
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/// will be migrated to the current version automatically.
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pub trait Schema: Send + Sync + Debug + DeserializeOwned + Serialize + 'static {
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/// Previous schema that can be migrated into the new schema
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/// Previous schema that can be migrated into the new schema.
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type Prev: Schema + Into<Self>;
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/// Schema version number
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/// Schema version number.
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const VERSION: u32 = Self::Prev::VERSION + 1;
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/// Whether unversioned data should be parsed as V0, rather than
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/// rejected with an error.
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const UNVERSIONED_V0: bool = Self::Prev::UNVERSIONED_V0;
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fn parse(s: &str) -> Result<Self, Error> {
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let Version { version } = serde_json::from_str(s)?;
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let version = match serde_json::from_str::<Version>(s)?.version {
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Some(v) => v,
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None => {
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if Self::UNVERSIONED_V0 {
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0
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} else {
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return Err(Error::MissingVersion);
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}
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}
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};
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match version.cmp(&Self::VERSION) {
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Ordering::Less => Ok(Self::Prev::parse(s)?.into()),
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Ordering::Equal => Ok(serde_json::from_str::<VersionedData<Self>>(s)?.data),
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@ -85,36 +101,28 @@ pub trait Schema: Send + Sync + Debug + DeserializeOwned + Serialize + 'static {
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/// Implementing this will automatically implement [`Schema`], with
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/// version number `0` and `Self` as the previous version.
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pub trait SchemaV0: Send + Sync + Debug + DeserializeOwned + Serialize + 'static {
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/// Set this to false if your version 0 is a pre-`JsonDb` schema
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/// that does not include a version number.
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const EXPECT_VERSION_NUMBER: bool = true;
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/// Set this to `true` if your version 0 data may be stored in a
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/// pre-`JsonDb` format that does not include a version number.
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/// Note that regardless of this setting, when data is written
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/// back to the JSON file, it will always include a version
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/// number.
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const VERSION_OPTIONAL: bool = false;
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}
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impl<T: SchemaV0> Schema for T {
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type Prev = Self;
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const VERSION: u32 = 0;
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fn parse(s: &str) -> Result<Self, Error> {
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if Self::EXPECT_VERSION_NUMBER {
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let Version { version } = serde_json::from_str(s)?;
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if version != 0 {
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return Err(Error::UnknownVersion(version));
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}
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Ok(serde_json::from_str::<VersionedData<Self>>(s)?.data)
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} else {
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Ok(serde_json::from_str(s)?)
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}
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}
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const UNVERSIONED_V0: bool = Self::VERSION_OPTIONAL;
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}
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#[derive(Deserialize)]
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struct Version {
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version: u32,
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version: Option<u32>,
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}
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#[derive(Deserialize, Serialize)]
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struct VersionedData<T> {
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version: u32,
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version: Option<u32>,
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#[serde(flatten)]
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data: T,
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}
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@ -128,6 +136,8 @@ pub enum Error {
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Json(#[from] serde_json::Error),
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#[error("Unknown schema version {0}")]
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UnknownVersion(u32),
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#[error("Missing schema version")]
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MissingVersion,
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}
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impl<T: Schema + Default> JsonDb<T> {
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@ -148,7 +158,7 @@ async fn save<T: Schema>(data: &T, path: &Path) -> Result<(), Error> {
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let mut temp_file = File::create(&temp_file_path).await?;
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temp_file
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.write_all(&serde_json::to_vec_pretty(&VersionedData {
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version: T::VERSION,
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version: Some(T::VERSION),
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data,
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})?)
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.await?;
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@ -296,323 +306,3 @@ impl<T: Schema> JsonDb<T> {
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.expect("Failed to receive flush confirmation");
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}
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}
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#[cfg(test)]
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mod tests {
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use std::{collections::HashMap, fs::File};
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use serde::{Deserialize, Serialize};
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use serde_json::Value;
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use serde_with::serde_as;
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use tempfile::tempdir;
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use time::OffsetDateTime;
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use super::{JsonDb, Schema, SchemaV0};
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#[derive(Default, Debug, PartialEq, Eq, Deserialize, Serialize)]
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struct V0 {
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name: String,
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}
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impl SchemaV0 for V0 {}
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#[derive(Default, Debug, PartialEq, Eq, Deserialize, Serialize)]
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struct V1 {
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name: String,
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#[serde(default)]
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gender: Option<String>,
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last_updated: i64,
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}
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impl Schema for V1 {
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type Prev = V0;
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}
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impl From<V0> for V1 {
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fn from(old: V0) -> Self {
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V1 {
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name: old.name,
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gender: None,
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last_updated: 0,
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}
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}
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}
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#[serde_as]
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#[derive(Debug, PartialEq, Eq, Deserialize, Serialize)]
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struct V2 {
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name: String,
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#[serde(default)]
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gender: Option<String>,
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#[serde_as(as = "time::format_description::well_known::Rfc3339")]
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last_updated: OffsetDateTime,
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}
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impl Default for V2 {
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fn default() -> Self {
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V2 {
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name: String::new(),
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gender: None,
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last_updated: OffsetDateTime::UNIX_EPOCH,
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}
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}
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}
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impl Schema for V2 {
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type Prev = V1;
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}
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impl From<V1> for V2 {
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fn from(old: V1) -> Self {
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V2 {
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name: old.name,
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gender: old.gender,
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last_updated: OffsetDateTime::from_unix_timestamp(old.last_updated).unwrap(),
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}
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}
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}
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const V0DATA: &str = r#"{"version":0,"name":"xenofem"}"#;
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const V1DATA: &str =
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r#"{"version":1,"name":"xenofem","gender":"dress go spinny","last_updated":1660585235}"#;
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const V2DATA: &str = r#"{"version":2,"name":"xenofem","gender":"dress go spinny","last_updated":"2022-08-15T17:47:18Z"}"#;
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#[test]
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fn parse_v0() {
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assert_eq!(
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V0::parse(V0DATA).unwrap(),
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V0 {
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name: String::from("xenofem")
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},
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);
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}
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#[test]
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fn parse_v1() {
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assert_eq!(
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V1::parse(V1DATA).unwrap(),
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V1 {
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name: String::from("xenofem"),
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gender: Some(String::from("dress go spinny")),
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last_updated: 1660585235
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},
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);
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}
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#[test]
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fn migrate_v0_v1() {
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assert_eq!(
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V1::parse(V0DATA).unwrap(),
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V1 {
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name: String::from("xenofem"),
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gender: None,
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last_updated: 0
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},
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);
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}
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#[test]
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fn parse_v2() {
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assert_eq!(
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V2::parse(V2DATA).unwrap(),
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V2 {
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name: String::from("xenofem"),
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gender: Some(String::from("dress go spinny")),
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last_updated: OffsetDateTime::from_unix_timestamp(1660585638).unwrap(),
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},
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);
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}
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#[test]
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fn migrate_v1_v2() {
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assert_eq!(
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V2::parse(V1DATA).unwrap(),
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V2 {
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name: String::from("xenofem"),
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gender: Some(String::from("dress go spinny")),
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last_updated: time::macros::datetime!(2022-08-15 17:40:35 +00:00)
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},
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);
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}
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#[test]
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fn migrate_v0_v2() {
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assert_eq!(
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V2::parse(V0DATA).unwrap(),
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V2 {
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name: String::from("xenofem"),
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gender: None,
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last_updated: time::macros::datetime!(1970-01-01 00:00:00 +00:00)
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},
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);
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}
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#[tokio::test]
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async fn async_load_write_migrate() {
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let dir = tempdir().unwrap();
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let db_file = dir.path().join("test.json");
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{
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let db0: JsonDb<V0> = JsonDb::load(db_file.clone()).await.unwrap();
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db0.flush().await;
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let value: Value = serde_json::from_reader(File::open(&db_file).unwrap()).unwrap();
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assert_eq!(value["version"], 0);
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assert_eq!(&value["name"], "");
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{
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let mut writer = db0.write().await;
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writer.name = String::from("mefonex");
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}
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{
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let reader = db0.read().await;
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assert_eq!(reader.name, "mefonex");
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}
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// Reading also awaits a flush
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let value: Value = serde_json::from_reader(File::open(&db_file).unwrap()).unwrap();
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assert_eq!(&value["name"], "mefonex");
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}
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{
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let db2: JsonDb<V2> = JsonDb::load(db_file.clone()).await.unwrap();
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db2.flush().await;
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let value: Value = serde_json::from_reader(File::open(&db_file).unwrap()).unwrap();
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assert_eq!(value["version"], 2);
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assert_eq!(&value["name"], "mefonex");
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assert_eq!(value["gender"], Value::Null);
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assert_eq!(&value["last_updated"], "1970-01-01T00:00:00Z");
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{
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let mut writer = db2.write().await;
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writer.last_updated = OffsetDateTime::from_unix_timestamp(1660585638).unwrap();
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}
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db2.flush().await;
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let value: Value = serde_json::from_reader(File::open(&db_file).unwrap()).unwrap();
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assert_eq!(&value["last_updated"], "2022-08-15T17:47:18Z");
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}
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}
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#[test]
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fn blocking_load_write_migrate() {
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let rt = tokio::runtime::Runtime::new().unwrap();
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let dir = tempdir().unwrap();
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let db_file = dir.path().join("test.json");
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{
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let db0: JsonDb<V0> = rt.block_on(JsonDb::load(db_file.clone())).unwrap();
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db0.blocking_flush();
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let value: Value = serde_json::from_reader(File::open(&db_file).unwrap()).unwrap();
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assert_eq!(value["version"], 0);
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assert_eq!(&value["name"], "");
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{
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let mut writer = db0.blocking_write();
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writer.name = String::from("mefonex");
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}
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{
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let reader = db0.blocking_read();
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assert_eq!(reader.name, "mefonex");
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}
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// Reading also waits for a flush
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let value: Value = serde_json::from_reader(File::open(&db_file).unwrap()).unwrap();
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assert_eq!(&value["name"], "mefonex");
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}
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{
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let db2: JsonDb<V2> = rt.block_on(JsonDb::load(db_file.clone())).unwrap();
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db2.blocking_flush();
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let value: Value = serde_json::from_reader(File::open(&db_file).unwrap()).unwrap();
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assert_eq!(value["version"], 2);
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assert_eq!(&value["name"], "mefonex");
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assert_eq!(value["gender"], Value::Null);
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assert_eq!(&value["last_updated"], "1970-01-01T00:00:00Z");
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{
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let mut writer = db2.blocking_write();
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writer.last_updated = OffsetDateTime::from_unix_timestamp(1660585638).unwrap();
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}
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db2.blocking_flush();
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let value: Value = serde_json::from_reader(File::open(&db_file).unwrap()).unwrap();
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assert_eq!(&value["last_updated"], "2022-08-15T17:47:18Z");
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}
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}
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#[test]
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fn catchall_schema_v0() {
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#[derive(Debug, PartialEq, Eq, Deserialize, Serialize)]
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struct Catchall(HashMap<String, String>);
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impl SchemaV0 for Catchall {}
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let mut data = HashMap::new();
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data.insert("hello".into(), "world".into());
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data.insert("catch".into(), "all".into());
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assert_eq!(
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Catchall::parse(r#"{"version":0,"hello":"world","catch":"all"}"#).unwrap(),
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Catchall(data)
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)
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}
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#[test]
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fn catchall_schema_v1_v2() {
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#[derive(Debug, PartialEq, Eq, Deserialize, Serialize)]
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struct Catchall0(HashMap<String, String>);
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impl SchemaV0 for Catchall0 {}
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#[derive(Debug, PartialEq, Eq, Deserialize, Serialize)]
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struct Catchall1 {
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count: usize,
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#[serde(flatten)]
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data: HashMap<String, String>,
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}
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impl Schema for Catchall1 {
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type Prev = Catchall0;
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}
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impl From<Catchall0> for Catchall1 {
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fn from(old: Catchall0) -> Self {
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Catchall1 {
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data: old.0,
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count: 0,
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}
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}
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}
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#[derive(Debug, PartialEq, Eq, Deserialize, Serialize)]
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struct Catchall2 {
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count: usize,
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name: String,
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#[serde(flatten)]
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data: HashMap<String, String>,
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}
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impl Schema for Catchall2 {
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type Prev = Catchall1;
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}
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impl From<Catchall1> for Catchall2 {
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fn from(old: Catchall1) -> Self {
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Catchall2 {
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data: old.data,
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count: old.count,
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name: String::new(),
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}
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}
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}
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let mut data = HashMap::new();
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data.insert("hello".into(), "world".into());
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data.insert("catch".into(), "all".into());
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assert_eq!(
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Catchall2::parse(r#"{"version":1,"count":42,"hello":"world","catch":"all"}"#).unwrap(),
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Catchall2 {
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data,
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count: 42,
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name: String::new(),
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},
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)
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}
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#[test]
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fn unversioned() {
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#[derive(Debug, PartialEq, Eq, Deserialize, Serialize)]
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struct Data {
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number: usize,
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truth: bool,
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}
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impl SchemaV0 for Data {
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const EXPECT_VERSION_NUMBER: bool = false;
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}
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assert_eq!(
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Data::parse(r#"{"number":42,"truth":true}"#).unwrap(),
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Data {
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number: 42,
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truth: true,
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},
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);
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}
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}
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|
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412
src/tests.rs
Normal file
412
src/tests.rs
Normal file
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@ -0,0 +1,412 @@
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use std::{collections::HashMap, fs::File};
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use serde::{Deserialize, Serialize};
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use serde_json::Value;
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use serde_with::serde_as;
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use tempfile::tempdir;
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use time::OffsetDateTime;
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use super::{JsonDb, Schema, SchemaV0};
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#[derive(Default, Debug, PartialEq, Eq, Deserialize, Serialize)]
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struct V0 {
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name: String,
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}
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impl SchemaV0 for V0 {}
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#[derive(Default, Debug, PartialEq, Eq, Deserialize, Serialize)]
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struct V1 {
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name: String,
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#[serde(default)]
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gender: Option<String>,
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last_updated: i64,
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}
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impl Schema for V1 {
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type Prev = V0;
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}
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impl From<V0> for V1 {
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fn from(old: V0) -> Self {
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V1 {
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name: old.name,
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gender: None,
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last_updated: 0,
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}
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}
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}
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#[serde_as]
|
||||
#[derive(Debug, PartialEq, Eq, Deserialize, Serialize)]
|
||||
struct V2 {
|
||||
name: String,
|
||||
#[serde(default)]
|
||||
gender: Option<String>,
|
||||
#[serde_as(as = "time::format_description::well_known::Rfc3339")]
|
||||
last_updated: OffsetDateTime,
|
||||
}
|
||||
impl Default for V2 {
|
||||
fn default() -> Self {
|
||||
V2 {
|
||||
name: String::new(),
|
||||
gender: None,
|
||||
last_updated: OffsetDateTime::UNIX_EPOCH,
|
||||
}
|
||||
}
|
||||
}
|
||||
impl Schema for V2 {
|
||||
type Prev = V1;
|
||||
}
|
||||
impl From<V1> for V2 {
|
||||
fn from(old: V1) -> Self {
|
||||
V2 {
|
||||
name: old.name,
|
||||
gender: old.gender,
|
||||
last_updated: OffsetDateTime::from_unix_timestamp(old.last_updated).unwrap(),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
const V0DATA: &str = r#"{"version":0,"name":"xenofem"}"#;
|
||||
const V1DATA: &str =
|
||||
r#"{"version":1,"name":"xenofem","gender":"dress go spinny","last_updated":1660585235}"#;
|
||||
const V2DATA: &str = r#"{"version":2,"name":"xenofem","gender":"dress go spinny","last_updated":"2022-08-15T17:47:18Z"}"#;
|
||||
|
||||
#[test]
|
||||
fn parse_v0() {
|
||||
assert_eq!(
|
||||
V0::parse(V0DATA).unwrap(),
|
||||
V0 {
|
||||
name: String::from("xenofem")
|
||||
},
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn parse_v1() {
|
||||
assert_eq!(
|
||||
V1::parse(V1DATA).unwrap(),
|
||||
V1 {
|
||||
name: String::from("xenofem"),
|
||||
gender: Some(String::from("dress go spinny")),
|
||||
last_updated: 1660585235
|
||||
},
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn migrate_v0_v1() {
|
||||
assert_eq!(
|
||||
V1::parse(V0DATA).unwrap(),
|
||||
V1 {
|
||||
name: String::from("xenofem"),
|
||||
gender: None,
|
||||
last_updated: 0
|
||||
},
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn parse_v2() {
|
||||
assert_eq!(
|
||||
V2::parse(V2DATA).unwrap(),
|
||||
V2 {
|
||||
name: String::from("xenofem"),
|
||||
gender: Some(String::from("dress go spinny")),
|
||||
last_updated: OffsetDateTime::from_unix_timestamp(1660585638).unwrap(),
|
||||
},
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn migrate_v1_v2() {
|
||||
assert_eq!(
|
||||
V2::parse(V1DATA).unwrap(),
|
||||
V2 {
|
||||
name: String::from("xenofem"),
|
||||
gender: Some(String::from("dress go spinny")),
|
||||
last_updated: time::macros::datetime!(2022-08-15 17:40:35 +00:00)
|
||||
},
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn migrate_v0_v2() {
|
||||
assert_eq!(
|
||||
V2::parse(V0DATA).unwrap(),
|
||||
V2 {
|
||||
name: String::from("xenofem"),
|
||||
gender: None,
|
||||
last_updated: time::macros::datetime!(1970-01-01 00:00:00 +00:00)
|
||||
},
|
||||
);
|
||||
}
|
||||
|
||||
#[tokio::test]
|
||||
async fn async_load_write_migrate() {
|
||||
let dir = tempdir().unwrap();
|
||||
let db_file = dir.path().join("test.json");
|
||||
{
|
||||
let db0: JsonDb<V0> = JsonDb::load(db_file.clone()).await.unwrap();
|
||||
db0.flush().await;
|
||||
let value: Value = serde_json::from_reader(File::open(&db_file).unwrap()).unwrap();
|
||||
assert_eq!(value["version"], 0);
|
||||
assert_eq!(&value["name"], "");
|
||||
{
|
||||
let mut writer = db0.write().await;
|
||||
writer.name = String::from("mefonex");
|
||||
}
|
||||
{
|
||||
let reader = db0.read().await;
|
||||
assert_eq!(reader.name, "mefonex");
|
||||
}
|
||||
// Reading also awaits a flush
|
||||
let value: Value = serde_json::from_reader(File::open(&db_file).unwrap()).unwrap();
|
||||
assert_eq!(&value["name"], "mefonex");
|
||||
}
|
||||
{
|
||||
let db2: JsonDb<V2> = JsonDb::load(db_file.clone()).await.unwrap();
|
||||
db2.flush().await;
|
||||
let value: Value = serde_json::from_reader(File::open(&db_file).unwrap()).unwrap();
|
||||
assert_eq!(value["version"], 2);
|
||||
assert_eq!(&value["name"], "mefonex");
|
||||
assert_eq!(value["gender"], Value::Null);
|
||||
assert_eq!(&value["last_updated"], "1970-01-01T00:00:00Z");
|
||||
{
|
||||
let mut writer = db2.write().await;
|
||||
writer.last_updated = OffsetDateTime::from_unix_timestamp(1660585638).unwrap();
|
||||
}
|
||||
db2.flush().await;
|
||||
let value: Value = serde_json::from_reader(File::open(&db_file).unwrap()).unwrap();
|
||||
assert_eq!(&value["last_updated"], "2022-08-15T17:47:18Z");
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn blocking_load_write_migrate() {
|
||||
let rt = tokio::runtime::Runtime::new().unwrap();
|
||||
|
||||
let dir = tempdir().unwrap();
|
||||
let db_file = dir.path().join("test.json");
|
||||
{
|
||||
let db0: JsonDb<V0> = rt.block_on(JsonDb::load(db_file.clone())).unwrap();
|
||||
db0.blocking_flush();
|
||||
let value: Value = serde_json::from_reader(File::open(&db_file).unwrap()).unwrap();
|
||||
assert_eq!(value["version"], 0);
|
||||
assert_eq!(&value["name"], "");
|
||||
{
|
||||
let mut writer = db0.blocking_write();
|
||||
writer.name = String::from("mefonex");
|
||||
}
|
||||
{
|
||||
let reader = db0.blocking_read();
|
||||
assert_eq!(reader.name, "mefonex");
|
||||
}
|
||||
// Reading also waits for a flush
|
||||
let value: Value = serde_json::from_reader(File::open(&db_file).unwrap()).unwrap();
|
||||
assert_eq!(&value["name"], "mefonex");
|
||||
}
|
||||
{
|
||||
let db2: JsonDb<V2> = rt.block_on(JsonDb::load(db_file.clone())).unwrap();
|
||||
db2.blocking_flush();
|
||||
let value: Value = serde_json::from_reader(File::open(&db_file).unwrap()).unwrap();
|
||||
assert_eq!(value["version"], 2);
|
||||
assert_eq!(&value["name"], "mefonex");
|
||||
assert_eq!(value["gender"], Value::Null);
|
||||
assert_eq!(&value["last_updated"], "1970-01-01T00:00:00Z");
|
||||
{
|
||||
let mut writer = db2.blocking_write();
|
||||
writer.last_updated = OffsetDateTime::from_unix_timestamp(1660585638).unwrap();
|
||||
}
|
||||
db2.blocking_flush();
|
||||
let value: Value = serde_json::from_reader(File::open(&db_file).unwrap()).unwrap();
|
||||
assert_eq!(&value["last_updated"], "2022-08-15T17:47:18Z");
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn catchall_schema_v0() {
|
||||
#[derive(Debug, PartialEq, Eq, Deserialize, Serialize)]
|
||||
struct Catchall(HashMap<String, String>);
|
||||
impl SchemaV0 for Catchall {}
|
||||
|
||||
let mut data = HashMap::new();
|
||||
data.insert("hello".into(), "world".into());
|
||||
data.insert("catch".into(), "all".into());
|
||||
|
||||
assert_eq!(
|
||||
Catchall::parse(r#"{"version":0,"hello":"world","catch":"all"}"#).unwrap(),
|
||||
Catchall(data)
|
||||
)
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn catchall_schema_v1_v2() {
|
||||
#[derive(Debug, PartialEq, Eq, Deserialize, Serialize)]
|
||||
struct Catchall0(HashMap<String, String>);
|
||||
impl SchemaV0 for Catchall0 {}
|
||||
|
||||
#[derive(Debug, PartialEq, Eq, Deserialize, Serialize)]
|
||||
struct Catchall1 {
|
||||
count: usize,
|
||||
#[serde(flatten)]
|
||||
data: HashMap<String, String>,
|
||||
}
|
||||
impl Schema for Catchall1 {
|
||||
type Prev = Catchall0;
|
||||
}
|
||||
impl From<Catchall0> for Catchall1 {
|
||||
fn from(old: Catchall0) -> Self {
|
||||
Catchall1 {
|
||||
data: old.0,
|
||||
count: 0,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Debug, PartialEq, Eq, Deserialize, Serialize)]
|
||||
struct Catchall2 {
|
||||
count: usize,
|
||||
name: String,
|
||||
#[serde(flatten)]
|
||||
data: HashMap<String, String>,
|
||||
}
|
||||
impl Schema for Catchall2 {
|
||||
type Prev = Catchall1;
|
||||
}
|
||||
impl From<Catchall1> for Catchall2 {
|
||||
fn from(old: Catchall1) -> Self {
|
||||
Catchall2 {
|
||||
data: old.data,
|
||||
count: old.count,
|
||||
name: String::new(),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
let mut data = HashMap::new();
|
||||
data.insert("hello".into(), "world".into());
|
||||
data.insert("catch".into(), "all".into());
|
||||
|
||||
assert_eq!(
|
||||
Catchall2::parse(r#"{"version":1,"count":42,"hello":"world","catch":"all"}"#).unwrap(),
|
||||
Catchall2 {
|
||||
data,
|
||||
count: 42,
|
||||
name: String::new(),
|
||||
},
|
||||
)
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn unversioned() {
|
||||
#[derive(Debug, PartialEq, Eq, Deserialize, Serialize)]
|
||||
struct Data {
|
||||
number: usize,
|
||||
truth: bool,
|
||||
}
|
||||
impl SchemaV0 for Data {
|
||||
const VERSION_OPTIONAL: bool = true;
|
||||
}
|
||||
assert_eq!(
|
||||
Data::parse(r#"{"number":42,"truth":true}"#).unwrap(),
|
||||
Data {
|
||||
number: 42,
|
||||
truth: true,
|
||||
},
|
||||
);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn catchall_v0_with_optional_version_number_present() {
|
||||
#[derive(Debug, PartialEq, Eq, Deserialize, Serialize)]
|
||||
struct Catchall(HashMap<String, String>);
|
||||
impl SchemaV0 for Catchall {
|
||||
const VERSION_OPTIONAL: bool = true;
|
||||
}
|
||||
|
||||
let mut data = HashMap::new();
|
||||
data.insert("hello".into(), "world".into());
|
||||
data.insert("catch".into(), "all".into());
|
||||
|
||||
assert_eq!(
|
||||
Catchall::parse(r#"{"version":0,"hello":"world","catch":"all"}"#).unwrap(),
|
||||
Catchall(data)
|
||||
)
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn catchall_v0_with_optional_version_number_absent() {
|
||||
#[derive(Debug, PartialEq, Eq, Deserialize, Serialize)]
|
||||
struct Catchall(HashMap<String, String>);
|
||||
impl SchemaV0 for Catchall {
|
||||
const VERSION_OPTIONAL: bool = true;
|
||||
}
|
||||
|
||||
let mut data = HashMap::new();
|
||||
data.insert("hello".into(), "world".into());
|
||||
data.insert("catch".into(), "all".into());
|
||||
|
||||
assert_eq!(
|
||||
Catchall::parse(r#"{"hello":"world","catch":"all"}"#).unwrap(),
|
||||
Catchall(data)
|
||||
)
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn unversioned_v0_migration() {
|
||||
#[derive(Debug, PartialEq, Eq, Deserialize, Serialize)]
|
||||
struct Catchall0(HashMap<String, String>);
|
||||
impl SchemaV0 for Catchall0 {
|
||||
const VERSION_OPTIONAL: bool = true;
|
||||
}
|
||||
|
||||
#[derive(Debug, PartialEq, Eq, Deserialize, Serialize)]
|
||||
struct Catchall1 {
|
||||
count: usize,
|
||||
#[serde(flatten)]
|
||||
data: HashMap<String, String>,
|
||||
}
|
||||
impl Schema for Catchall1 {
|
||||
type Prev = Catchall0;
|
||||
}
|
||||
impl From<Catchall0> for Catchall1 {
|
||||
fn from(old: Catchall0) -> Self {
|
||||
Catchall1 {
|
||||
data: old.0,
|
||||
count: 0,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[derive(Debug, PartialEq, Eq, Deserialize, Serialize)]
|
||||
struct Catchall2 {
|
||||
count: usize,
|
||||
name: String,
|
||||
#[serde(flatten)]
|
||||
data: HashMap<String, String>,
|
||||
}
|
||||
impl Schema for Catchall2 {
|
||||
type Prev = Catchall1;
|
||||
}
|
||||
impl From<Catchall1> for Catchall2 {
|
||||
fn from(old: Catchall1) -> Self {
|
||||
Catchall2 {
|
||||
data: old.data,
|
||||
count: old.count,
|
||||
name: String::new(),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
let mut data = HashMap::new();
|
||||
data.insert("hello".into(), "world".into());
|
||||
data.insert("catch".into(), "all".into());
|
||||
|
||||
assert_eq!(
|
||||
Catchall2::parse(r#"{"hello":"world","catch":"all"}"#).unwrap(),
|
||||
Catchall2 {
|
||||
data,
|
||||
count: 0,
|
||||
name: String::new(),
|
||||
},
|
||||
)
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue