txmap 3.1.5

A concurrent transactional hash map for Rust with fine-grained locking, internal mutability and composable transactions
Documentation 
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use crate::{
    prelude::*,
    tests::{creators::*, data::*, types::*},
};

#[test]
fn param_swap_value() {
    let map = map_alice_bob(1, 2);
    let result = map
        .immediate_tx::<GetTwoParamState>()
        .swap_value(ALICE.into(), BOB.into())
        .get(ALICE.into(), |_k, v, s| s.result_a = v.copied())
        .get(BOB.into(), |_k, v, s| s.result_b = v.copied())
        .execute();
    assert_eq!(
        result,
        TxResult::Completed {
            state: GetTwoParamState {
                result_a: Some(2),
                result_b: Some(1)
            }
        }
    );
}