Lesson 7: Error encountered while running test

[Night-Prime]

I keep encountering this error below, i have tried to debug and isolate where the error is stemming from, but have failed to discover the source, here's it:

Hardhat-FundMe % npx hardhat test


  FundMe
    constructor
      1) sets the aggregator addresses correctly


  0 passing (2s)
  1 failing

  1) FundMe
       constructor
         sets the aggregator addresses correctly:
     Error: call revert exception [ See: https://links.ethers.org/v5-errors-CALL_EXCEPTION ] (method="priceFeed()", data="0x", errorArgs=null, errorName=null, errorSignature=null, reason=null, code=CALL_EXCEPTION, version=abi/5.7.0)
      at Logger.makeError (node_modules/@ethersproject/logger/src.ts/index.ts:269:28)
      at Logger.throwError (node_modules/@ethersproject/logger/src.ts/index.ts:281:20)
      at Interface.decodeFunctionResult (node_modules/@ethersproject/abi/src.ts/interface.ts:427:23)
      at Contract.<anonymous> (node_modules/@ethersproject/contracts/src.ts/index.ts:400:44)
      at step (node_modules/@ethersproject/contracts/lib/index.js:48:23)
      at Object.next (node_modules/@ethersproject/contracts/lib/index.js:29:53)
      at fulfilled (node_modules/@ethersproject/contracts/lib/index.js:20:58)
      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)

Here's my FundMe.test.js code :

    let fundMe = deployments
    let deployer
    let mockV3Aggregator
    // const sendValue = ethers.utils.parseEther("50")
    beforeEach(async () => {
        deployer = (await getNamedAccounts()).deployer
        await deployments.fixture(["all"])
        fundMe = await ethers.getContractAt("FundMe", deployer)
        mockV3Aggregator = await ethers.getContractAt(
            "MockV3Aggregator",
            deployer
        )
    })
    describe("constructor", async () => {
        it("sets the aggregator addresses correctly", async () => {
            const response = await fundMe.priceFeed()
            assert.equal(response, mockV3Aggregator.address)
        })
    })
})

And my Package.json (to show i have installed the compatible version of ethers)

{
  "devDependencies": {
    "@chainlink/contracts": "^0.6.1",
    "@nomicfoundation/hardhat-toolbox": "^2.0.2",
    "@nomiclabs/hardhat-ethers": "npm:hardhat-deploy-ethers@^0.3.0-beta.13",
    "deploy": "^1.0.3",
    "hardhat": "^2.14.0",
    "hardhat-deploy": "^0.11.29",
    "prettier": "^2.8.8",
    "prettier-plugin-solidity": "^1.1.3"
  },
  "dependencies": {
    "dotenv": "^16.0.3"
  }
}

[aaankeet]

@Night-Prime

change this

fundMe = await ethers.getContractAt("FundMe", deployer)
mockV3Aggregator = await ethers.getContractAt("MockV3Aggregator", deployer)

to this

fundMe = await ethers.getContract("FundMe", deployer)
mockV3Aggregator = await ethers.getContract( "MockV3Aggregator", deployer)

[Night-Prime]

I get another error using ether.getContract

  FundMe
    constructor
      1) "before each" hook for "sets the aggregator addresses correctly"


  0 passing (2s)
  1 failing

  1) FundMe
       "before each" hook for "sets the aggregator addresses correctly":
     Error: No Contract deployed with name FundMe
      at Object.getContract (node_modules/@nomiclabs/hardhat-ethers/src/internal/helpers.ts:447:11)
      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)
      at Context.<anonymous> (test/unit/FundMe.test.js:12:18)

[alymurtazamemon]

Instructions for your second issue.

@Night-Prime No Contract deployed with name ContractName error occurs when you get your contracts in your tests with getContract function but it does not find that smart contract deployed.

await deployments.fixture(["all"])

We use this line to deploy all our contracts before we use them in our tests. But as you can see we gave it a tag all so it will only deploy the scripts which contain this tag.

Now it your case the issue could be the typo in the name of the smart contract you mentioned in your tests or a missing tag for that deploy script file.

I hope now you can figure it out yourself, if you still face any issues then please leave your repository link so I can let you know where is the error exactly.

[Night-Prime]

Okay thanks, here's the link: https://github.com/Night-Prime/Web3--Learning-Hardhat.git

[alymurtazamemon]

@Night-Prime Remove default from module.exports.default in your deploy scripts. Otherwise, tags will not be able to execute.

[Night-Prime]

It worked, thank you so much.