You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: v1_to_v2.rs
    path of file: ./repos/meilisearch/dump/src/reader/compat
    
    the code of the file until where you have to start completion: use std::str::FromStr;

use super::v2_to_v3::CompatV2ToV3;
use crate::reader::{v1, v2, Document};
use crate::Result;

pub struct CompatV1ToV2 {
    pub from: v1::V1Reader,
}

impl CompatV1ToV2 {
    pub fn new(v1: v1::V1Reader) -> Self {
        Self { from: v1 }
    }

    pub fn to_v3(self) -> CompatV2ToV3 {
        CompatV2ToV3::Compat(self)
    }

    pub fn version(&self) -> crate::Version {
        self.from.version()
    }

    pub fn date(&self) -> Option<time::OffsetDateTime> {
        self.from.date()
    }

    pub fn index_uuid(&self) -> Vec<v2::meta::IndexUuid> {
        self.from
            .index_uuid()
            .into_iter()
            .enumerate()
            // we use the index of the index ðŸ˜¬ as UUID for the index, so that we can link the v2::Task to their index
            .map(|(index, index_uuid)| v2::meta::IndexUuid {
                uid: index_uuid.uid,
                uuid: uuid::Uuid::from_u128(index as u128),
            })
            .collect()
    }

    pub fn indexes(&self) -> Result<impl Iterator<Item = Result<CompatIndexV1ToV2>> + '_> {
        Ok(self.from.indexes()?.map(|index_reader| Ok(CompatIndexV1ToV2 { from: index_reader? })))
    }

    pub fn tasks(
        &mut self,
    ) -> Box<dyn Iterator<Item = Result<(v2::Task, Option<v2::UpdateFile>)>> + '_> {
        // Convert an error here to an iterator yielding the error
        let indexes = match self.from.indexes() {
            Ok(indexes) => indexes,
            Err(err) => return Box::new(std::iter::once(Err(err))),
        };
        let it = indexes.e
    
    fn compat_v1_v2() {
        let dump = File::open("tests/assets/v1.dump").unwrap();
        let dir = TempDir::new().unwrap();
        let mut dump = BufReader::new(dump);
        let gz = GzDecoder::new(&mut dump);
        let mut archive = tar::Archive::new(gz);
        archive.unpack(dir.path()).unwrap();

        let mut dump = v1::V1Reader::open(dir).unwrap().to_v2();

        // top level infos
        assert_eq!(dump.date(), None);

        // tasks
        let tasks = dump.tasks().collect::<Result<Vec<_>>>().unwrap();
        let (tasks, update_files): (Vec<_>, Vec<_>) = tasks.into_iter().unzip();
        meili_snap::snapshot_hash!(meili_snap::json_string!(tasks), @"2298010973ee98cf4670787314176a3a");
        assert_eq!(update_files.len(), 9);
        assert!(update_files[..].iter().all(|u| u.is_none())); // no update file in dumps v1

        // indexes
        let mut indexes = dump.indexes().unwrap().collect::<Result<Vec<_>>>().unwrap();
        // the index are not ordered in any way by default
        indexes.sort_by_key(|index| index.metadata().uid.to_string());

        let mut products = indexes.pop().unwrap();
        let mut movies = indexes.pop().unwrap();
        let mut spells = indexes.pop().unwrap();
        assert!(indexes.is_empty());

        // products
        insta::assert_json_snapshot!(products.metadata(), @r###"
        {
          "uid": "products",
          "primaryKey": "sku",
          "createdAt": "2022-10-02T13:23:39.976870431Z",
          "updatedAt": "2022-10-02T13:27:54.353262482Z"
        }
        "###);

        insta::assert_json_snapshot!(products.settings().unwrap());
        let documents = products.documents().unwrap().collect::<Result<Vec<_>>>().unwrap();
        assert_eq!(documents.len(), 10);
        meili_snap::snapshot_hash!(format!("{:#?}", documents), @"b01c8371aea4c7171af0d4d846a2bdca");

        // movies
        insta::assert_json_snapshot!(movies.metadata(), @r###"
        {
          "uid": "movies",
          "primaryKey": "id",
          "createdAt": "2022-10-02T13:15:29.477512777Z",
          "updatedAt": "2022-10-02T13:21:12.671204856Z"
        }
        "###);

        insta::assert_json_snapshot!(movies.settings().unwrap());
        let documents = movies.documents().unwrap().collect::<Result<Vec<_>>>().unwrap();
        assert_eq!(documents.len(), 10);
        meili_snap::snapshot_hash!(format!("{:#?}", documents), @"b63dbed5bbc059f3e32bc471ae699bf5");

        // spells
        insta::assert_json_snapshot!(spells.metadata(), @r###"
        {
          "uid": "dnd_spells",
          "primaryKey": "index",
          "createdAt": "2022-10-02T13:38:26.358882984Z",
          "updatedAt": "2022-10-02T13:38:26.385609433Z"
        }
        "###);

        insta::assert_json_snapshot!(spells.settings().unwrap());
        let documents = spells.documents().unwrap().collect::<Result<Vec<_>>>().unwrap();
        assert_eq!(documents.len(), 10);
        meili_snap::snapshot_hash!(format!("{:#?}", documents), @"aa24c0cfc733d66c396237ad44263bed");
    }