map

// SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.8.0 <0.9.0;

contract Map {
    mapping(int256 => string) dataMap;

    constructor(){
        dataMap[1] = "a";
    }

    function get(int256 k) external view returns (string memory){
        return dataMap[k];
    }

    function set(int256 k,string memory v) external {
        dataMap[k] = v;
    }

    function get2(int256 k) external view returns (string memory v) {
        string storage x = dataMap[k];
        v = x;
    }
}

const { expect } = require("chai");
const { ethers } = require("hardhat");

describe("contract", function () {
    it("test", async function () {
      const MyContract = await ethers.getContractFactory("Map");
      const myContract = await MyContract.deploy();
      result = await myContract.get(1);
      console.log("result:",result.toString())
      await myContract.set(100,"kkk");
      result = await myContract.get(100);
      console.log("result:",result.toString())
      result = await myContract.get2(100);
      console.log("result:",result.toString())
    });
  });

result: a
result: kkk
result: kkk