Lesson 7 unit test ethers error

[roychaadit]

the following is my code for FundMe.test.js

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

describe("FundMe", function () {
    let fundMe, deployer, mockV3Aggregator

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

However, I am getting the following error despite having all the require statements.

yarn run v1.22.19
warning package.json: No license field
$ /Users/aaditroychowdhury/Documents/Blockchain/FreeCodeCamp/hardhat-fund-me-fcc/node_modules/.bin/hardhat test


  FundMe
    constructor
Local network detected! Deploying mocks...
Mocks deployed!
----------------------------------------------
      1) "before each" hook for "sets the aggregator addresses correctly"


  0 passing (950ms)
  1 failing

  1) FundMe
       "before each" hook for "sets the aggregator addresses correctly":
     TypeError: ethers.getContract is not a function
      at Context.<anonymous> (test/unit/FundMe.test.js:10:31)
      at processTicksAndRejections (node:internal/process/task_queues:95:5)
      at runNextTicks (node:internal/process/task_queues:64:3)
      at listOnTimeout (node:internal/timers:533:9)
      at processTimers (node:internal/timers:507:7)



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

how can this be fixed?

[TrudyCyns]

If you are using ethers v6, this is where the issue could be coming from. Try replacing the lines having getContract() with getContractAt(). This method takes an extra parameter on top of the contract name:
Example:

fundMe = await ethers.getContractAt("FundMe", deployer);

[roychaadit]

thanks! However I am now getting a new error pertaining to the priceFeed() function.

I get the same result for priceFeed(), getPriceFeed() and priceFeed.

The following is my code:

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

describe("FundMe", function () {
    let fundMe, deployer, mockV3Aggregator

    beforeEach(async function () {
        deployer = (await getNamedAccounts()).deployer
        await deployments.fixture(["all"])
        fundMe = await ethers.getContractAt("FundMe", deployer)
        mockV3Aggregator = await ethers.getContractAt(
            "MockV3Aggregator",
            deployer
        )
    })

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

The following is my error:

yarn run v1.22.19
warning package.json: No license field
$ /Users/aaditroychowdhury/Documents/Blockchain/FreeCodeCamp/hardhat-fund-me-fcc/node_modules/.bin/hardhat test


  FundMe
    constructor
Local network detected! Deploying mocks...
Mocks deployed!
----------------------------------------------
      1) sets the aggregator addresses correctly


  0 passing (1s)
  1 failing

  1) FundMe
       constructor
         sets the aggregator addresses correctly:
     Error: could not decode result data (value="0x", info={ "method": "priceFeed", "signature": "priceFeed()" }, code=BAD_DATA, version=6.6.4)
      at makeError (node_modules/ethers/src.ts/utils/errors.ts:677:21)
      at assert (node_modules/ethers/src.ts/utils/errors.ts:694:25)
      at Interface.decodeFunctionResult (node_modules/ethers/src.ts/abi/interface.ts:916:15)
      at staticCallResult (node_modules/ethers/src.ts/contract/contract.ts:324:35)
      at processTicksAndRejections (node:internal/process/task_queues:95:5)
      at staticCall (node_modules/ethers/src.ts/contract/contract.ts:281:24)
      at Proxy.priceFeed (node_modules/ethers/src.ts/contract/contract.ts:329:41)
      at Context.<anonymous> (test/unit/FundMe.test.js:19:30)



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

I am also attaching the contract just to be on the safe side:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.8;

import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV3Interface.sol";
import "./PriceConverter.sol";

error FundMe__NotOwner();

/**@title A sample Funding Contract
 * @author ARC
 * @notice This contract is for creating a sample funding contract
 * @dev This implements price feeds as our library
 */

contract FundMe {
    using PriceConverter for uint256;

    mapping(address => uint256) public addressToAmountFunded;
    address[] public funders;

    address public immutable i_owner;
    uint256 public constant MINIMUM_USD = 50 * 10 ** 18;

    AggregatorV3Interface public priceFeed;

    modifier onlyOwner() {
        // require(msg.sender == owner);
        if (msg.sender != i_owner) revert FundMe__NotOwner();
        _;
    }

    constructor(address priceFeedAddress) {
        i_owner = msg.sender;
        priceFeed = AggregatorV3Interface(priceFeedAddress);
    }

    receive() external payable {
        fund();
    }

    fallback() external payable {
        fund();
    }

    function fund() public payable {
        require(
            msg.value.getConversionRate(priceFeed) >= MINIMUM_USD,
            "You need to spend more ETH!"
        );
        // require(PriceConverter.getConversionRate(msg.value) >= MINIMUM_USD, "You need to spend more ETH!");
        addressToAmountFunded[msg.sender] += msg.value;
        funders.push(msg.sender);
    }

    function withdraw() public onlyOwner {
        for (
            uint256 funderIndex = 0;
            funderIndex < funders.length;
            funderIndex++
        ) {
            address funder = funders[funderIndex];
            addressToAmountFunded[funder] = 0;
        }
        funders = new address[](0);

        (bool callSuccess, ) = payable(msg.sender).call{
            value: address(this).balance
        }("");
        require(callSuccess, "Call failed");
    }
}

[TrudyCyns]

I am actually going through a similar issue at #5884 . Check it out and see if you find something helpful.

[noserefe]

Similar issue for me

[santiagolavia]

Leave getContract() and be sure you have installed the "yarn add --dev hardhat @nomiclabs/hardhat-ethers@npm:hardhat-deploy-ethers ethers" and require ir in hardhat config