Lesson 7 - FundMe.test.js - Cannot read properties of undefined (reading 'getContract')

[alkali333]

I have just started the testing section, and I was getting some errors so I copy/pasted Patrick's code from the repository. But now I am getting a different error. Here is my FundMe.test.js file

const { assert, expect } = require("chai")
const { network, deployments, ethers } = require("hardhat")
describe("FundMe", async function () {
    let fundMe
    let deployer
    let mockV3Aggregator
    beforeEach(async () => {
        // const accounts = await ethers.getSigners()
        // deployer = accounts[0]
        deployer = (await getNamedAccounts()).deployer
        await deployments.fixture(["all"])
        fundMe = await ethers.getContract("FundMe", deployer)
        mockV3Aggregator = await ethers.getContract(
            "MockV3Aggregator",
            deployer
        )
    })
    describe("constructor", function () {
        it("sets the aggregator addresses correctly", async () => {
            const response = await fundMe.getPriceFeed()
            assert.equal(response, mockV3Aggregator.address)
        })
    })
})

The error seems to be with the getContract function. When I run "yarn hardhat test"

Cannot read properties of undefined (reading 'getContract')

The contracts were deployed successfully using "yarn hardhat deploy"

Can anybody help with this. Did I miss something along the way?

[alymurtazamemon]

@alkali333 Push it to GitHub and leave a link here.

[alymurtazamemon]

@alkali333 found the issue, uncomment this line // require("@nomiclabs/hardhat-waffle") in hardhat.config.js file.

[alymurtazamemon]

@alkali333 Now it is working if you want I will push the code, let me know.

[alkali333]

Thanks so much! I uncommented that line and installed hardhat-waffle and it all works fine.

Do you know why waffle is needed? I can't recall it being mentioned in the course but maybe missed I it.

[RoboCrypter]

@alkali333 : You can use this plugin to build smart contract tests using Waffle in Hardhat, and also This plugin adds a Hardhat-ready version of Waffle to the Hardhat Runtime Environment, and automatically initializes the Waffle Chai matchers.

[Kshitij0106]

Even though it resloved the issue, but what is the other way around since hardhat have stopped supporting waffle

[othaime-en]

Delete the node_modules folder and run yarn