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: contract_test.rs
    path of file: ./repos/wormhole/cosmwasm/contracts/ibc-translator/tests
    
    the code of the file until where you have to start completion: use cosmwasm_std::{
    coin,
    testing::{mock_dependencies, mock_env, mock_info},
    to_binary, Binary, ContractResult, CosmosMsg, Empty, Event, Reply, ReplyOn, Response,
    SubMsgResponse, SystemError, SystemResult, Uint128, WasmMsg, WasmQuery,
};
use cw_token_bridge::msg::TransferInfoResponse;
use ibc_translator::{
    contract::{execute, instantiate, migrate, query, reply},
    msg::{ChannelResponse, ExecuteMsg, InstantiateMsg, QueryMsg, COMPLETE_TRANSFER_REPLY_ID},
    state::{CHAIN_TO_CHANNEL_MAP, CURRENT_TRANSFER, CW_DENOMS, TOKEN_BRIDGE_CONTRACT},
};
use wormhole_bindings::tokenfactory::{TokenFactoryMsg, TokenMsg};

mod test_setup;
use test_setup::{
    execute_custom_mock_deps, mock_env_custom_contract, WORMHOLE_CONTRACT_ADDR, WORMHOLE_USER_ADDR,
};

// TESTS
// 1. instantiate
//    1. happy path
// 2. migrate
//    1. happy path
// 3. execute
//    
    
fn execute_submit_update_chain_to_channel_map() {
    let mut deps = execute_custom_mock_deps();
    let info = mock_info(WORMHOLE_USER_ADDR, &[]);
    let env = mock_env();
    let vaa = Binary::from_base64("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").unwrap();

    let msg = ExecuteMsg::SubmitUpdateChainToChannelMap { vaa };
    let response = execute(deps.as_mut(), env, info, msg).unwrap();

    // response should have 0 message
    assert_eq!(response.messages.len(), 0);
    assert_eq!(
        response,
        Response::new().add_event(
            Event::new("UpdateChainToChannelMap")
                .add_attribute("chain_id", "Karura".to_string())
                .add_attribute("channel_id", "channel-1".to_string()),
        )
    );
}