[SOLVED]PatrickCollins Solidity Course 2022 - Lesson 7: 11:20:38 -> TypeError: ethers.getContract is not a function

Question

AssertionError: Expected transaction to be reverted with You need to spend more ETH!, but other exception was thrown: Error: Transaction reverted: function returned an unexpected amount of data

I was getting this error when running test for fundMe() around 11:20:38 of the video

describe("FundMe", async function () {
  let fundMe;
  let deployer;
  let 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", async function () {
    it("sets the aggregator addresses correctly", async function () {
      const response = await fundMe.priceFeed();
      assert.equal(response, MockV3Aggregator.address);
    });
  });
  describe("fund", async function () {
    it("Fails if you don't send enough ETH", async function () {
      await expect(fundMe.fund()).to.be.revertedWith(
        "You need to spend more ETH!"
      );
    });
  });
});

After some research it seemed that the issue could ber esolved by downloading @nomicslabs/hardhat-waffle from hardhat docs [https://hardhat.org/plugins/nomiclabs-hardhat-waffle]

But after running the install I now get the following error running the above test

  1) FundMe
       "before each" hook for "sets the aggregator addresses correctly":
     TypeError: ethers.getContract is not a function

Any ideas of what could be the issue here? thank you!

Answer 1

[SOLVED]

I tried to modify the line so it reads: await expect(fundMe.fund()).to.be.reverted

Both tests seem to pass that way as you can see below

So it is definitely the line but I still don't understand why adding the string causes the error, maybe I am missing a parameter or an import.

Answer 2

yarn add hardhat--dev @nomiclabs/hardhat-ethers@npm:hardhat-deploy-ethers ethers

Ran this again and fixed the issue.

Now test 1 passes but test returns the following error when it gets to

await expect(fundMe.fund()).to.be.revertedWith("You need to spend more ETH!");

ERROR:

  1) FundMe
       fund
         Fails if you don't send enough ETH:
     AssertionError: Expected transaction to be reverted with You need to spend more ETH!, but other exception was thrown: Error: Transaction reverted: function returned an unexpected amount of data