【Hardhat 运行测试】

• 删除artifacts和缓存

> yarn hardhat clean

• 官网参考
• 在test目录下创建test-deploy.js文件

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

// Mocha 测试框架会识别这个describe函数
describe("SimpleStorage", function () {
  let simpleStorageFactory, simpleStorage
  beforeEach(async function () {
    simpleStorageFactory = await ethers.getContractFactory("SimpleStorage")
    simpleStorage = await simpleStorageFactory.deploy()
  })

  // 测试做什么，用函数来实际执行这个操作
  it("Should start with a favorite number of 0", async function () {
    const currentValue = await simpleStorage.retrieve()
    const expectedValue = "0"
    assert.equal(currentValue.toString(), expectedValue)
    // expect(currentValue.toString()).to.equal(expectedValue) // 等价于上面
  })
  it("Should update when we call store", async function () {
    const expectedValue = "7"
    const transactionResponse = await simpleStorage.store(expectedValue)
    await transactionResponse.wait(1)

    const currentValue = await simpleStorage.retrieve()
    assert.equal(currentValue.toString(), expectedValue)
  })
})

• 运行命令yarn hardhat test

> yarn hardhat test
yarn run v1.22.19
..\node_modules\.bin\hardhat test


  SimpleStorage
    ✔ Should start with a favorite number of 0
    ✔ Should update when we call store


  2 passing (2s)

Done in 2.28s.

• 运行指定某一个it测试，【方式一】：使用--grep指定it中的第一个String参数所包含的字符即可，因为store字符在第二个it中存在，因此只测试第二个

> yarn hardhat test --grep store
yarn run v1.22.19
$ E:\web3_solidity\hardhat-solidity01\node_modules\.bin\hardhat test --grep store


  SimpleStorage
    ✔ Should update when we call store


  1 passing (2s)

Done in 2.26s.

• 运行指定某一个it测试，【方式二】：用it.only来代替it，然后运行命令yarn hardhat test

//test-deploy.js
it.only("Should start with a favorite number of 0", async function () {
    const currentValue = await simpleStorage.retrieve()
    const expectedValue = "0"
    assert.equal(currentValue.toString(), expectedValue)
})

> yarn hardhat test
yarn run v1.22.19
..\node_modules\.bin\hardhat test


  SimpleStorage
    ✔ Should start with a favorite number of 0


  1 passing (2s)

Done in 2.24s.