Use more complete snapshot tests for the index scheduler

file-store/src/lib.rs

@@ -58,6 +58,16 @@ impl FileStore {
 
         Ok((uuid, update_file))
     }
+    /// Creates a new temporary update file with the given Uuid.
+    /// A call to `persist` is needed to persist the file in the database.
+    pub fn new_update_woth_uuid(&self, uuid: u128) -> Result<(Uuid, File)> {
+        let file = NamedTempFile::new_in(&self.path)?;
+        let uuid = Uuid::from_u128(uuid);
+        let path = self.path.join(uuid.to_string());
+        let update_file = File { file, path };
+
+        Ok((uuid, update_file))
+    }
 
     /// Returns the file corresponding to the requested uuid.
     pub fn get_update(&self, uuid: Uuid) -> Result<StdFile> {