persy 0.2.0

Transactional Persistence Engine
Documentation
extern crate persy;

use persy::Persy;
use persy::PersyError;
use persy::Config;
use persy::TxStrategy;
use std::fs;

#[test]
fn test_insert_read_commit_record() {
    {
        Persy::create("./irc.persy").unwrap();
    }
    {
        let persy = Persy::open("./irc.persy", Config::new()).unwrap();

        let mut tx = persy.begin().unwrap();
        persy.create_segment(&mut tx, "test").unwrap();
        let bytes = String::from("something").into_bytes();
        let id = persy.insert_record(&mut tx, "test", &bytes).unwrap();
        let read_opt = persy.read_record_tx(&mut tx, "test", &id).unwrap();
        assert_eq!(read_opt, Some(bytes));
        let finalizer = persy.prepare_commit(tx).unwrap();
        persy.commit(finalizer).unwrap();

        let bytes = String::from("something").into_bytes();
        let read_after = persy.read_record("test", &id).unwrap();
        assert_eq!(read_after, Some(bytes));

    }
    fs::remove_file("./irc.persy").unwrap();
}

#[test]
fn test_insert_update_record() {
    {
        Persy::create("./iru.persy").unwrap();
    }
    {
        let persy = Persy::open("./iru.persy", Config::new()).unwrap();

        let mut tx = persy.begin().unwrap();
        persy.create_segment(&mut tx, "test").unwrap();
        let rec_data: String = "something".into();
        let bytes = rec_data.into_bytes();
        let id = persy.insert_record(&mut tx, "test", &bytes).unwrap();
        let read_opt = persy.read_record_tx(&mut tx, "test", &id).unwrap();
        assert_eq!(read_opt, Some(bytes));
        let finalizer = persy.prepare_commit(tx).unwrap();
        persy.commit(finalizer).unwrap();

        let rec_1: String = "newthing".into();
        let bytes_1 = rec_1.into_bytes();
        let mut tx1 = persy.begin().unwrap();
        persy.update_record(&mut tx1, "test", &id, &bytes_1).unwrap();
        let read_after = persy.read_record_tx(&mut tx1, "test", &id).unwrap();
        assert_eq!(read_after, Some(bytes_1));
        let finalizer = persy.prepare_commit(tx1).unwrap();
        persy.commit(finalizer).unwrap();

    }
    fs::remove_file("./iru.persy").unwrap();
}

#[test]
fn test_insert_delete_record() {
    {
        Persy::create("./ird.persy").unwrap();
    }
    {
        let persy = Persy::open("./ird.persy", Config::new()).unwrap();

        let mut tx = persy.begin().unwrap();
        persy.create_segment(&mut tx, "test").unwrap();
        let rec_data: String = "something".into();
        let bytes = rec_data.into_bytes();
        let id = persy.insert_record(&mut tx, "test", &bytes).unwrap();
        let read_opt = persy.read_record_tx(&mut tx, "test", &id).unwrap();
        assert_eq!(read_opt, Some(bytes));
        let finalizer = persy.prepare_commit(tx).unwrap();
        persy.commit(finalizer).unwrap();

        let mut tx1 = persy.begin().unwrap();
        persy.delete_record(&mut tx1, "test", &id).unwrap();
        let read_after = persy.read_record_tx(&mut tx1, "test", &id).unwrap();
        assert_eq!(read_after, None);
        let finalizer = persy.prepare_commit(tx1).unwrap();
        persy.commit(finalizer).unwrap();

    }
    fs::remove_file("./ird.persy").unwrap();
}

#[test]
fn test_insert_scan_records() {
    {
        Persy::create("./irs.persy").unwrap();
    }
    {
        let persy = Persy::open("./irs.persy", Config::new()).unwrap();

        let mut tx = persy.begin().unwrap();
        persy.create_segment(&mut tx, "test").unwrap();
        let rec_data: String = "something".into();
        let bytes = rec_data.into_bytes();
        persy.insert_record(&mut tx, "test", &bytes).unwrap();
        let finalizer = persy.prepare_commit(tx).unwrap();
        persy.commit(finalizer).unwrap();
        let iter = persy.scan_records("test").unwrap().into_iter();
        assert_eq!(iter.count(), 1);
        let rec = persy.scan_records("test").unwrap().into_iter().next().unwrap();
        assert_eq!(bytes, rec.content);
    }
    fs::remove_file("./irs.persy").unwrap();
}


#[test]
fn test_insert_update_same_tx() {
    {
        Persy::create("./ius.persy").unwrap();
    }
    {
        let persy = Persy::open("./ius.persy", Config::new()).unwrap();

        let mut tx = persy.begin().unwrap();
        persy.create_segment(&mut tx, "test").unwrap();
        let bytes = String::from("something").into_bytes();
        let id = persy.insert_record(&mut tx, "test", &bytes).unwrap();
        let read_opt = persy.read_record_tx(&mut tx, "test", &id).unwrap();
        assert_eq!(read_opt, Some(bytes));
        let bytes = String::from("data1").into_bytes();
        persy.update_record(&mut tx, "test", &id, &bytes).unwrap();
        let read_opt = persy.read_record_tx(&mut tx, "test", &id).unwrap();
        assert_eq!(read_opt, Some(bytes));
        let finalizer = persy.prepare_commit(tx).unwrap();
        persy.commit(finalizer).unwrap();

        let read_after = persy.read_record("test", &id).unwrap();
        let bytes = String::from("data1").into_bytes();
        assert_eq!(read_after, Some(bytes));

    }
    fs::remove_file("./ius.persy").unwrap();
}

#[test]
fn test_double_update_same_tx() {
    {
        Persy::create("./iuus.persy").unwrap();
    }
    {
        let persy = Persy::open("./iuus.persy", Config::new()).unwrap();

        let mut tx = persy.begin().unwrap();
        persy.create_segment(&mut tx, "test").unwrap();
        let bytes = String::from("something").into_bytes();
        let id = persy.insert_record(&mut tx, "test", &bytes).unwrap();
        let finalizer = persy.prepare_commit(tx).unwrap();
        persy.commit(finalizer).unwrap();
        let mut tx = persy.begin().unwrap();
        let bytes = String::from("first").into_bytes();
        persy.update_record(&mut tx, "test", &id, &bytes).unwrap();
        let bytes = String::from("second").into_bytes();
        persy.update_record(&mut tx, "test", &id, &bytes).unwrap();
        let read_opt = persy.read_record_tx(&mut tx, "test", &id).unwrap();
        assert_eq!(read_opt, Some(bytes));
        let finalizer = persy.prepare_commit(tx).unwrap();
        persy.commit(finalizer).unwrap();

        let read_after = persy.read_record("test", &id).unwrap();
        let bytes = String::from("second").into_bytes();
        assert_eq!(read_after, Some(bytes));
    }
    fs::remove_file("./iuus.persy").unwrap();
}

#[test]
fn test_insert_update_delete_same_tx() {
    {
        Persy::create("./iuds.persy").unwrap();
    }
    {
        let persy = Persy::open("./iuds.persy", Config::new()).unwrap();

        let mut tx = persy.begin().unwrap();
        persy.create_segment(&mut tx, "test").unwrap();
        let bytes = String::from("something").into_bytes();
        let id = persy.insert_record(&mut tx, "test", &bytes).unwrap();
        let bytes = String::from("first").into_bytes();
        persy.update_record(&mut tx, "test", &id, &bytes).unwrap();
        persy.delete_record(&mut tx, "test", &id).unwrap();
        let read_opt = persy.read_record_tx(&mut tx, "test", &id).unwrap();
        assert_eq!(read_opt, None);
        let finalizer = persy.prepare_commit(tx).unwrap();
        persy.commit(finalizer).unwrap();

        let read_after = persy.read_record("test", &id).unwrap();
        assert_eq!(read_after, None);

    }
    fs::remove_file("./iuds.persy").unwrap();
}

#[test]
fn test_update_delete_same_tx() {
    {
        Persy::create("./uds.persy").unwrap();
    }
    {
        let persy = Persy::open("./uds.persy", Config::new()).unwrap();

        let mut tx = persy.begin().unwrap();
        persy.create_segment(&mut tx, "test").unwrap();
        let bytes = String::from("something").into_bytes();
        let id = persy.insert_record(&mut tx, "test", &bytes).unwrap();
        let finalizer = persy.prepare_commit(tx).unwrap();
        persy.commit(finalizer).unwrap();

        let mut tx = persy.begin().unwrap();
        let bytes = String::from("first").into_bytes();
        persy.update_record(&mut tx, "test", &id, &bytes).unwrap();
        persy.delete_record(&mut tx, "test", &id).unwrap();
        let read_opt = persy.read_record_tx(&mut tx, "test", &id).unwrap();
        assert_eq!(read_opt, None);
        let finalizer = persy.prepare_commit(tx).unwrap();
        persy.commit(finalizer).unwrap();

        let read_after = persy.read_record("test", &id).unwrap();
        assert_eq!(read_after, None);

    }
    fs::remove_file("./uds.persy").unwrap();
}

#[test]
fn test_insert_100_same_tx() {
    {
        Persy::create("./i100.persy").unwrap();
    }
    {
        let persy = Persy::open("./i100.persy", Config::new()).unwrap();

        let mut tx = persy.begin().unwrap();
        persy.create_segment(&mut tx, "test").unwrap();
        let bytes = String::from("something").into_bytes();
        for _ in [0; 100].iter() {
            persy.insert_record(&mut tx, "test", &bytes).unwrap();
        }
        let finalizer = persy.prepare_commit(tx).unwrap();
        persy.commit(finalizer).unwrap();

        let mut count = 0;
        for _ in persy.scan_records("test").unwrap() {
            count += 1;
        }
        assert_eq!(count, 100);

    }
    fs::remove_file("./i100.persy").unwrap();
}


#[test]
fn test_create_insert_scan_same_tx() {
    {
        Persy::create("./cistx.persy").unwrap();
    }
    {
        let persy = Persy::open("./cistx.persy", Config::new()).unwrap();
        let mut tx = persy.begin().unwrap();
        persy.create_segment(&mut tx, "test").unwrap();
        let bytes = String::from("something").into_bytes();
        for _ in [0; 50].iter() {
            persy.insert_record(&mut tx, "test", &bytes).unwrap();
        }
        let mut count = 0;
        for rec in persy.scan_records_tx(&mut tx, "test").unwrap() {
            assert_eq!(rec.content, bytes);
            count += 1;
        }
        assert_eq!(count, 50);
        let finalizer = persy.prepare_commit(tx).unwrap();
        persy.commit(finalizer).unwrap();
    }
    fs::remove_file("./cistx.persy").unwrap();
}

#[test]
fn test_insert_100_and_scan_same_tx() {
    {
        Persy::create("./i100tx.persy").unwrap();
    }
    {
        let persy = Persy::open("./i100tx.persy", Config::new()).unwrap();

        let mut tx = persy.begin().unwrap();
        persy.create_segment(&mut tx, "test").unwrap();
        let bytes = String::from("something").into_bytes();
        for _ in [0; 50].iter() {
            persy.insert_record(&mut tx, "test", &bytes).unwrap();
        }
        let finalizer = persy.prepare_commit(tx).unwrap();
        persy.commit(finalizer).unwrap();

        let mut tx = persy.begin().unwrap();
        for _ in [0; 50].iter() {
            persy.insert_record(&mut tx, "test", &bytes).unwrap();
        }
        let mut count = 0;
        for rec in persy.scan_records_tx(&mut tx, "test").unwrap() {
            assert_eq!(rec.content, bytes);
            count += 1;
        }
        assert_eq!(count, 100);
        let finalizer = persy.prepare_commit(tx).unwrap();
        persy.commit(finalizer).unwrap();

    }
    fs::remove_file("./i100tx.persy").unwrap();
}

#[test]
fn test_insert_100_update_and_scan_same_tx() {
    {
        Persy::create("./i100u_tx.persy").unwrap();
    }
    {
        let persy = Persy::open("./i100u_tx.persy", Config::new()).unwrap();

        let mut tx = persy.begin().unwrap();
        persy.create_segment(&mut tx, "test").unwrap();
        let bytes = String::from("something").into_bytes();
        let mut inserted = Vec::new();
        for _ in [0; 50].iter() {
            inserted.push(persy.insert_record(&mut tx, "test", &bytes).unwrap());
        }
        let finalizer = persy.prepare_commit(tx).unwrap();
        persy.commit(finalizer).unwrap();

        let bytes_other = String::from("other").into_bytes();
        let mut tx = persy.begin().unwrap();
        for _ in [0; 50].iter() {
            persy.insert_record(&mut tx, "test", &bytes).unwrap();
        }
        for id in inserted.iter() {
            persy.update_record(&mut tx, "test", id, &bytes_other).unwrap();
        }

        let mut count = 0;
        for rec in persy.scan_records_tx(&mut tx, "test").unwrap() {
            if inserted.contains(&rec.id) {
                assert_eq!(rec.content, bytes_other);
            } else {
                assert_eq!(rec.content, bytes);
            }
            count += 1;
        }
        assert_eq!(count, 100);
        let finalizer = persy.prepare_commit(tx).unwrap();
        persy.commit(finalizer).unwrap();

    }
    fs::remove_file("./i100u_tx.persy").unwrap();
}

#[test]
fn test_scan_tx_segment_not_exist() {
    {
        Persy::create("./sne_tx.persy").unwrap();
    }
    {
        let persy = Persy::open("./sne_tx.persy", Config::new()).unwrap();
        let mut tx = persy.begin().unwrap();
        let res = persy.scan_records_tx(&mut tx, "test");
        if let Err(x) = res {
            match x {
                PersyError::SegmentNotFound => {}
                _ => assert!(false),
            }
        } else {
            assert!(false);
        }
    }
    fs::remove_file("./sne_tx.persy").unwrap();
}

#[test]
fn test_concurrency_version_on_write() {
    {
        Persy::create("./cvow.persy").unwrap();
    }
    {
        let mut config = Config::new();
        config.change_tx_strategy(TxStrategy::VersionOnWrite);
        let persy = Persy::open("./cvow.persy", config).unwrap();
        let mut tx = persy.begin().unwrap();
        persy.create_segment(&mut tx, "seg").unwrap();
        let bytes = String::from("aaa").into_bytes();
        let id = persy.insert_record(&mut tx, "seg", &bytes).unwrap();
        let prep = persy.prepare_commit(tx).unwrap();
        persy.commit(prep).unwrap();


        let bytes2 = String::from("bbb").into_bytes();
        let mut tx = persy.begin().unwrap();
        persy.update_record(&mut tx, "seg", &id, &bytes2).unwrap();

        let bytes3 = String::from("cccc").into_bytes();
        let mut tx1 = persy.begin().unwrap();
        persy.update_record(&mut tx1, "seg", &id, &bytes3).unwrap();

        let prep = persy.prepare_commit(tx1).unwrap();
        persy.commit(prep).unwrap();
        let to_fail = persy.prepare_commit(tx);
        assert!(to_fail.is_err());
        let val = persy.read_record("seg", &id).unwrap().unwrap();
        assert_eq!(val, bytes3);
    }
    fs::remove_file("./cvow.persy").unwrap();
}


#[test]
fn test_concurrency_last_win() {
    {
        Persy::create("./cvol.persy").unwrap();
    }
    {
        let mut config = Config::new();
        config.change_tx_strategy(TxStrategy::LastWin);
        let persy = Persy::open("./cvol.persy", config).unwrap();
        let mut tx = persy.begin().unwrap();
        persy.create_segment(&mut tx, "seg").unwrap();
        let bytes = String::from("aaa").into_bytes();
        let id = persy.insert_record(&mut tx, "seg", &bytes).unwrap();
        let prep = persy.prepare_commit(tx).unwrap();
        persy.commit(prep).unwrap();


        let bytes2 = String::from("bbb").into_bytes();
        let mut tx = persy.begin().unwrap();
        persy.update_record(&mut tx, "seg", &id, &bytes2).unwrap();

        let bytes3 = String::from("cccc").into_bytes();
        let mut tx1 = persy.begin().unwrap();
        persy.update_record(&mut tx1, "seg", &id, &bytes3).unwrap();

        let prep = persy.prepare_commit(tx1).unwrap();
        persy.commit(prep).unwrap();

        let prep = persy.prepare_commit(tx).unwrap();
        persy.commit(prep).unwrap();

        let val = persy.read_record("seg", &id).unwrap().unwrap();
        assert_eq!(val, bytes2);
    }
    fs::remove_file("./cvol.persy").unwrap();
}


#[test]
fn test_concurrency_version_on_read() {
    {
        Persy::create("./cvor.persy").unwrap();
    }
    {
        let mut config = Config::new();
        config.change_tx_strategy(TxStrategy::VersionOnRead);
        let persy = Persy::open("./cvor.persy", config).unwrap();
        let mut tx = persy.begin().unwrap();
        persy.create_segment(&mut tx, "seg").unwrap();
        let bytes = String::from("aaa").into_bytes();
        let id = persy.insert_record(&mut tx, "seg", &bytes).unwrap();
        let prep = persy.prepare_commit(tx).unwrap();
        persy.commit(prep).unwrap();


        let bytes2 = String::from("bbb").into_bytes();
        let mut tx = persy.begin().unwrap();
        let _ = persy.read_record_tx(&mut tx, "seg", &id).unwrap();

        let bytes3 = String::from("cccc").into_bytes();

        let mut tx1 = persy.begin().unwrap();
        persy.update_record(&mut tx1, "seg", &id, &bytes3).unwrap();
        let prep = persy.prepare_commit(tx1).unwrap();
        persy.commit(prep).unwrap();

        persy.update_record(&mut tx, "seg", &id, &bytes2).unwrap();
        let to_fail = persy.prepare_commit(tx);
        assert!(to_fail.is_err());

        let val = persy.read_record("seg", &id).unwrap().unwrap();
        assert_eq!(val, bytes3);
    }
    fs::remove_file("./cvor.persy").unwrap();
}



#[test]
fn test_scan_segment_not_exist() {
    {
        Persy::create("./sne.persy").unwrap();
    }
    {
        let persy = Persy::open("./sne.persy", Config::new()).unwrap();
        let res = persy.scan_records("test");
        if let Err(x) = res {
            match x {
                PersyError::SegmentNotFound => {}
                _ => assert!(false),
            }
        } else {
            assert!(false);
        }
    }
    fs::remove_file("./sne.persy").unwrap();
}