Error: No Contract deployed with name VRFCoordinatorV2Mock

[kihiuFrank]

Hoped to solve this one on my own but can't tell what's causing the error. I have checked every question posted but didn't find a solution. Everything looks fine. I also have another test for BasicNft.test.js and that one runs fine. No idea why this can't see the VRFCoordinatorV2Mock.

The deployments run without any issue too. I'm using this commad to run the deployments;

yarn hardhat deploy --tags randomipfs,mocks 

I'm writing a test to show the contract deploys successfully but it fails.

Test

it("randomIpfsNft deploys successfully", async () => {
              assert(randomIpfsNft.address)
          })

command

yarn hardhat test --grep "randomIpfsNft deploys successfully"

Error

RandomIpfsNft Unit Tests

    1) "before each" hook: runs before every test for "randomIpfsNft deploys successfully"


  0 passing (751ms)
  1 failing

  1) RandomIpfsNft Unit Tests
       "before each" hook: runs before every test for "randomIpfsNft deploys successfully":
     ERROR processing /Users/k_frankline/projects/hardhat-nfts/deploy/02-deploy-randon-ipfs-nft.js:
Error: No Contract deployed with name VRFCoordinatorV2Mock
    at Object.getContract (/Users/k_frankline/projects/hardhat-nfts/node_modules/@nomiclabs/hardhat-ethers/src/internal/helpers.ts:447:11)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at Object.module.exports [as func] (/Users/k_frankline/projects/hardhat-nfts/deploy/02-deploy-randon-ipfs-nft.js:48:38)
    at DeploymentsManager.executeDeployScripts (/Users/k_frankline/projects/hardhat-nfts/node_modules/hardhat-deploy/src/DeploymentsManager.ts:1220:22)
    at DeploymentsManager.runDeploy (/Users/k_frankline/projects/hardhat-nfts/node_modules/hardhat-deploy/src/DeploymentsManager.ts:1053:5)
    at Object.fixture (/Users/k_frankline/projects/hardhat-nfts/node_modules/hardhat-deploy/src/DeploymentsManager.ts:315:9)
    at Context.<anonymous> (/Users/k_frankline/projects/hardhat-nfts/test/unit/randomIpfsNft.test.js:13:15)
  Error: ERROR processing /Users/k_frankline/projects/hardhat-nfts/deploy/02-deploy-randon-ipfs-nft.js:
  Error: No Contract deployed with name VRFCoordinatorV2Mock
      at Object.getContract (node_modules/@nomiclabs/hardhat-ethers/src/internal/helpers.ts:447:11)
      at processTicksAndRejections (node:internal/process/task_queues:96:5)
      at Object.module.exports [as func] (deploy/02-deploy-randon-ipfs-nft.js:48:38)
      at DeploymentsManager.executeDeployScripts (node_modules/hardhat-deploy/src/DeploymentsManager.ts:1220:22)
      at DeploymentsManager.runDeploy (node_modules/hardhat-deploy/src/DeploymentsManager.ts:1053:5)
      at Object.fixture (node_modules/hardhat-deploy/src/DeploymentsManager.ts:315:9)
      at Context.<anonymous> (test/unit/randomIpfsNft.test.js:13:15)
      at DeploymentsManager.executeDeployScripts (node_modules/hardhat-deploy/src/DeploymentsManager.ts:1223:19)
      at processTicksAndRejections (node:internal/process/task_queues:96:5)
      at DeploymentsManager.runDeploy (node_modules/hardhat-deploy/src/DeploymentsManager.ts:1053:5)
      at Object.fixture (node_modules/hardhat-deploy/src/DeploymentsManager.ts:315:9)
      at Context.<anonymous> (test/unit/randomIpfsNft.test.js:13:15)

02-deploy-randon-ipfs-nft.js

let vrfCoordinatorV2Address, subscriptionId

    if (developmentChains.includes(network.name)) {
        // create VRFV2 Subscription
        const vrfCoordinatorV2Mock = await ethers.getContract("VRFCoordinatorV2Mock")
        vrfCoordinatorV2Address = vrfCoordinatorV2Mock.address
        const tx = await vrfCoordinatorV2Mock.createSubscription()
        const txReceipt = await tx.wait(1)
        subscriptionId = txReceipt.events[0].args.subId
        // Fund the subscription
        // Our mock makes it so we don't actually have to worry about sending fund
        await vrfCoordinatorV2Mock.fundSubscription(subscriptionId, FUND_AMOUNT)
    } else {
        vrfCoordinatorV2Address = networkConfig[chainId].vrfCoordinatorV2
        subscriptionId = networkConfig[chainId].subscriptionId
    }

Repo: https://github.com/kihiuFrank/hardhat-nfts

[pacelliv]

Your unit test is deploying the script with the tag "randomipfs", but the code in that script is looking for the latest deployment of VRFCoordinatorV2Mock but can't find it because the mock is not being deploying by the test. Including the "mocks" tag should fix this error:

describe("RandomIpfsNft Unit Tests", () => {
          let deployer, randomIpfsNft, vrfCoordinatorV2Mock

          beforeEach("runs before every test", async () => {
              accounts = await ethers.getSigners()
              deployer = accounts[0]
              //   deployer = await getNamedAccounts()
              await deployments.fixture(["mocks", "randomipfs"])
              randomIpfsNft = await ethers.getContract("RandomIpfsNft", deployer)
              vrfCoordinatorV2Mock = await ethers.getContract("VRFCoordinatorV2Mock")
          })

[kihiuFrank]

@pacelliv Thanks a lot. It worked.
I have a question;
Why is my basicNft test running just fine without requiring the "mocks" tag, but the randomIpfsNft test requires it?
I was deploying the contracts and then running the randomIpfsNft test.

[pacelliv]

The way I see it:

Why is my basicNft test running just fine without requiring the "mocks"

That's because of the logic inside 01-deploy-basic-nft.js - in this script you don't need the latest instance of VRFCoordinatorV2Mock. So when you run basicNft test, the command await deployments.fixture(["basicnft"]) will pick up the script with the tag "basicnft", it will deploy the script, get the latest instance of the contract to be store in basicNft = await ethers.getContract("BasicNft", deployer) to be use in the logic inside the test.

but the randomIpfsNft test requires it?

Let me clarify that for what you were trying to assert in the test, the logic inside randomIpfsNft-test.js does not require the latest instance of VRFCoordinatorV2Mock.

Yet, why you got the error? Because when you ran the test - the command await deployments.fixture(["randomipfs"]) was picking up 02-deploy-randon-ipfs-nft.js and inside this script is where is required the latest instance of VRFCoordinatorV2Mock but your test was not deploying 00-deploy-mocks.js

I was deploying the contracts and then running the randomIpfsNft test.

hre.deployments.fixture can only grab the latest instance of a contract during execution of the command. So, previously running yarn hardhat deploy --tags randomipfs,mocks is a different execution.

[kihiuFrank]

I understand now. Thanks a lot, bud.

[pacelliv]

Good luck!

[RoboCrypter]

@kihiuFrank : Correct this line in your tests :

From this : await deployments.fixture(["randomipfs"]) ---> To this : await deployments.fixture(["all"])

That should make sure, You are getting all the deployments required for the test!

[kihiuFrank]

@abossofmyself this works too.
Thanks for taking your time to look at it.

[thesayyesman]

I got one such error because I've numbered the deploy scripts in wrong order.
You should give mock.js less number than contract.js.

The Wrong naming:

The Right naming:

[Taha-Zerarkaa]

change this >>
const vrfCoordinatorV2Mock = await ethers.getContract("VRFCoordinatorV2Mock")
to this >>
const vrfCoordinatorV2Mock = await ethers.getContractFactory("VRFCoordinatorV2Mock")