0

根据 Hardhat 的官方测试文档ethers应该在全局范围内隐式可用;但是,它可以选择require显式地 d ,如下所示:

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

这对我的本地项目失败。

我的包清单似乎包含正确的依赖项:

{
  "dependencies": {
    "@nomiclabs/hardhat-ethers": "^2.0.1",
    "@nomiclabs/hardhat-waffle": "^2.0.1",
    "@openzeppelin/contracts": "https://github.com/OpenZeppelin/openzeppelin-contracts#v4.0.0-beta.0",
    "chai": "^4.3.1",
    "hardhat": "^2.0.11"
  }
}

我的单元测试文件似乎也与 Hardhat 文档中的工作示例相匹配:

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

describe("Distributor.sol", function() {
    it("Distribution should fail for non-owners", async function() {
        const DistributorFactory = await ethers.getContractFactory("Distributor");
        const Distributor = await Distributor.deploy();

        Distributor.distribute([], []);

        expect(await hardhatToken.totalSupply()).to.be.revertedWith("foobar");
    });
});

尽管如此,运行测试还是失败了:

$ yarn hardhat test
yarn run v1.22.5
$ /home/bob/dev/misc/token-distributor/node_modules/.bin/hardhat test


  Distributor.sol
undefined
    1) Distribution should fail for non-owners


  0 passing (9ms)
  1 failing

  1) Distributor.sol
       Distribution should fail for non-owners:
     TypeError: Cannot read property 'getContractFactory' of undefined
      at Context.<anonymous> (test/Distributor.js:8:49)
      at processImmediate (internal/timers.js:461:21)



error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

我该如何解决?

4

2 回答 2

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在您的hardhat.config.js

require("@nomiclabs/hardhat-waffle");

并从您的测试文件中删除这一行:

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

然后,您可以ethers在测试中使用。Hardhat 在运行测试之前首先查看配置。如果你需要一个包含你的包,ethers你可以在全局范围内使用它。

于 2021-04-02T11:31:33.133 回答
0

两件事情:

  1. 您也需要按照说明中的说明ethers单独安装,例如hardhat-ethers
    npm install --save-dev @nomiclabs/hardhat-ethers 'ethers@^5.0.0'

  2. 每个 Hardhat 插件都需要在 Hardhat 配置文件 ( hardhat.config.js) 中注册:
    require("@nomiclabs/hardhat-ethers");

无需删除测试文件中的显式导入,但是,Hardhat 文档建议遵循以下样式:

const hre = require("hardhat);
const { ethers } = hre;
于 2021-08-10T18:27:27.577 回答