Use BTreeMap for features to ensure stable sorting

src/downloads_counter.rs

@@ -247,7 +247,7 @@ mod tests {
     use crate::models::{Crate, NewCrate, NewUser, NewVersion, User};
     use diesel::PgConnection;
     use semver::Version;
-    use std::collections::HashMap;
+    use std::collections::BTreeMap;
 
     #[test]
     fn test_increment_and_persist_all() {
@@ -452,7 +452,7 @@ mod tests {
             let version = NewVersion::new(
                 self.krate.id,
                 &Version::parse(&format!("{}.0.0", self.next_version)).unwrap(),
-                &HashMap::new(),
+                &BTreeMap::new(),
                 None,
                 None,
                 0,

src/models/version.rs

@@ -1,4 +1,4 @@
-use std::collections::HashMap;
+use std::collections::BTreeMap;
 
 use chrono::NaiveDateTime;
 use diesel::prelude::*;
@@ -129,7 +129,7 @@ impl NewVersion {
     pub fn new(
         crate_id: i32,
         num: &semver::Version,
-        features: &HashMap<String, Vec<String>>,
+        features: &BTreeMap<String, Vec<String>>,
         license: Option<String>,
         license_file: Option<&str>,
         crate_size: i32,

src/tests/builders/publish.rs

@@ -1,5 +1,5 @@
 use cargo_registry::views::krate_publish as u;
-use std::{collections::HashMap, io::Read};
+use std::{collections::BTreeMap, collections::HashMap, io::Read};
 
 use flate2::{write::GzEncoder, Compression};
 use once_cell::sync::Lazy;
@@ -36,7 +36,7 @@ pub struct PublishBuilder {
     readme: Option<String>,
     tarball: Vec<u8>,
     version: semver::Version,
-    features: HashMap<u::EncodableFeatureName, Vec<u::EncodableFeature>>,
+    features: BTreeMap<u::EncodableFeatureName, Vec<u::EncodableFeature>>,
 }
 
 impl PublishBuilder {
@@ -56,7 +56,7 @@ impl PublishBuilder {
             readme: None,
             tarball: EMPTY_TARBALL_BYTES.to_vec(),
             version: semver::Version::parse("1.0.0").unwrap(),
-            features: HashMap::new(),
+            features: BTreeMap::new(),
         }
     }
 

src/tests/builders/version.rs

@@ -3,7 +3,7 @@ use cargo_registry::{
     schema::{dependencies, versions},
     util::errors::AppResult,
 };
-use std::collections::HashMap;
+use std::collections::BTreeMap;
 
 use chrono::NaiveDateTime;
 use diesel::prelude::*;
@@ -12,7 +12,7 @@ use diesel::prelude::*;
 pub struct VersionBuilder<'a> {
     created_at: Option<NaiveDateTime>,
     dependencies: Vec<(i32, Option<&'static str>)>,
-    features: HashMap<String, Vec<String>>,
+    features: BTreeMap<String, Vec<String>>,
     license: Option<&'a str>,
     license_file: Option<&'a str>,
     num: semver::Version,
@@ -37,7 +37,7 @@ impl<'a> VersionBuilder<'a> {
         VersionBuilder {
             created_at: None,
             dependencies: Vec::new(),
-            features: HashMap::new(),
+            features: BTreeMap::new(),
             license: None,
             license_file: None,
             num,

src/views/krate_publish.rs

@@ -2,7 +2,7 @@
 //! and manages the serialising and deserialising of this information
 //! to and from structs. The serlializing is only utilised in
 //! integration tests.
-use std::collections::HashMap;
+use std::collections::{BTreeMap, HashMap};
 
 use serde::{de, Deserialize, Deserializer, Serialize, Serializer};
 
@@ -17,7 +17,7 @@ pub struct EncodableCrateUpload {
     pub name: EncodableCrateName,
     pub vers: EncodableCrateVersion,
     pub deps: Vec<EncodableCrateDependency>,
-    pub features: HashMap<EncodableFeatureName, Vec<EncodableFeature>>,
+    pub features: BTreeMap<EncodableFeatureName, Vec<EncodableFeature>>,
     pub description: Option<String>,
     pub homepage: Option<String>,
     pub documentation: Option<String>,
@@ -53,7 +53,7 @@ pub struct EncodableCategoryList(pub Vec<EncodableCategory>);
 pub struct EncodableCategory(pub String);
 #[derive(Serialize, Debug, Deref)]
 pub struct EncodableFeature(pub String);
-#[derive(PartialEq, Eq, Hash, Serialize, Debug, Deref)]
+#[derive(PartialEq, Eq, PartialOrd, Ord, Hash, Serialize, Debug, Deref)]
 pub struct EncodableFeatureName(pub String);
 
 #[derive(Serialize, Deserialize, Debug)]

src/worker/update_downloads.rs

@@ -85,7 +85,7 @@ mod test {
     use super::*;
     use crate::email::Emails;
     use crate::models::{Crate, NewCrate, NewUser, NewVersion, User, Version};
-    use std::collections::HashMap;
+    use std::collections::BTreeMap;
 
     fn user(conn: &PgConnection) -> User {
         NewUser::new(2, "login", None, None, "access_token")
@@ -103,7 +103,7 @@ mod test {
         let version = NewVersion::new(
             krate.id,
             &semver::Version::parse("1.0.0").unwrap(),
-            &HashMap::new(),
+            &BTreeMap::new(),
             None,
             None,
             0,