Lesson 7: yarn hardhat test - not working

[N-dcool]

I checked my code many time also read others discussion but could not solve my issue, here is the issue :(

here is my FundMe.test.js

const { assert } = require("chai");
const { deployments, getNamedAccounts, ethers } = require("hardhat");

describe("FundMe", function () {
    let fundMe;
    let MockV3Aggregator;
    let deployer;

    beforeEach(async function () {
        deployer = (await getNamedAccounts()).deployer;
        await deployments.fixture(["all"]);
        fundMe = await ethers.getContract("FundMe", deployer);
        MockV3Aggregator = await ethers.getContract(
            "MockV3Aggregator",
            deployer
        );
    });

    describe("constructor", () => {
        it("sets the aggregator addresses correctly", async () => {
            const response = await fundMe.priceFeed();
            assert.equal(response, MockV3Aggregator.address);
        });
    });
});

[N-dcool]

After long debugging time i find out the actual problem, which is related to ethers which is because of JsonpcProvider,
I have solved this and shared my solution on Ethereum StackOverflow :
https://ethereum.stackexchange.com/questions/146902/before-each-hook-for-sets-the-aggregator-addresses-correctly-typeerror-cann/146903#146903

Thank You !
Don't forget to upvote, it consumed my half day to debug 😷.

[raagzziee]

@N-dcool Did you delete the whole node modules or just @ethersproject?

[N-dcool]

@N-dcool Did you delete the whole node modules or just @ethersproject?

I just deleted ethers by using

1. yarn remove ethers
2. And then added using yarn add ethers@5.7.2

[MK3nn3dy]

This may not be helpful, but I got the same error for a different reason:

I cloned a version of the code where I needed to use the getPriceFeed() public view to return the price feed, as the s_priceFeed has a different name and is private:

describe("constructor", async function () {
        it("sets the aggregator addresses correctly", async function () {
            const response = await fundMe.getPriceFeed()
            assert.equal(response, mockV3Aggregator.address)
        })
    })