txmap 1.1.0

A concurrent transactional hash map for Rust with fine-grained locking, internal mutability and composable transactions
Documentation 
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#[cfg(test)]
mod tests {
    use crate::{
        prelude::*,
        tests::{
            creators::creators::{map_alice, map_alice_bob},
            data::data::{ALICE, BOB},
        },
    };

    #[test]
    fn swap_value_exchanges_values() {
        let map = map_alice_bob(1, 2);
        let tx = map
            .transaction()
            .swap_value(ALICE.into(), BOB.into())
            .get_all_copied([ALICE.into(), BOB.into()])
            .into_transaction();
        assert_eq!(tx.execute(), TxResult::Completed(vec![Some(2), Some(1)]));
    }

    #[test]
    fn swap_with_missing_value() {
        let map = map_alice(1);
        let tx = map
            .transaction()
            .swap_value(ALICE.into(), BOB.into())
            .get_all_copied([ALICE.into(), BOB.into()])
            .into_transaction();
        assert_eq!(tx.execute(), TxResult::Completed(vec![None, Some(1)]));
    }

    #[test]
    fn swap_value_same_key() {
        let map = map_alice(7);
        let tx = map
            .transaction()
            .swap_value(ALICE.into(), ALICE.into())
            .get_copied(ALICE.into())
            .into_transaction();
        assert_eq!(tx.execute(), TxResult::Completed(Some(7)));
    }
}