Lesson 14. How to access dogOwner variable inside of fulfillRandomWords function?

[RohanNero]

I am trying to assert that the dogOwner address is equal to the deployer address in my RandomIpfsNft unit tests,
but when I try to get the dogOwner variable from the txReceipt It has a bunch of numbers (mostly 0's) in front of it.
Am I getting the address of dogOwner incorrectly? Or is that just how the value is returned because of how solidity storage is arranged or something?

Here is a screenshot of the test and the terminal output:

Here is the function I am trying to cover in my test:

function fulfillRandomWords(uint256 requestId, uint256[] memory randomWords)
        internal
        override
    {
        address dogOwner = s_requestIdToSender[requestId];
        uint256 newTokenId = s_tokenCounter;
        // What does this token look like?

        uint256 moddedRng = randomWords[0] & MAX_CHANCE_VALUE;

        Breed dogBreed = getBreedFromModdedRng(moddedRng);

        _safeMint(dogOwner, newTokenId);
        _setTokenURI(newTokenId, s_dogTokenUris[uint256(dogBreed)]);
        emit NftMinted(dogBreed, dogOwner);
    }

specifically, that test is trying to assert that address dogOwner == deployer.address

[alymurtazamemon]

@RohanNero What do you want to test?

[alymurtazamemon]

@RohanNero I think you are trying to test these two functions requestNFT and fulfillRandomWords right? Here are my tests for these (covers 100% coverage) you can get an idea from here.

describe("requestNFT", () => {
  it("should revert if amount is less than mintFee.", async () => {
    await expect(randomIpfsNft.requestNFT()).to.be.revertedWith(
      "RandomIpfsNFT__NotEnoughETHSent"
    );
  });
});

describe("fulfillRandomWords", () => {
  it("should emit an event on nft mined.", async () => {
    await new Promise(async (resolve, reject) => {
      randomIpfsNft.once("NftMinted", async () => {
        try {
          const tokenUri = await randomIpfsNft.getDogTokenUris(0);
          const tokenCounts = await randomIpfsNft.getTokenCounter();

          assert.equal(tokenUri, tokenUriAtIndexZero);
          assert.equal(tokenCounts, 1);
          resolve();
        } catch (error) {
          console.log(error);
          reject(error);
        }
      });

      try {
        const fee = await randomIpfsNft.getMintFee();
        const requestNftResponse = await randomIpfsNft.requestNFT({
          value: fee.toString(),
        });
        const requestNftReceipt = await requestNftResponse.wait(1);
        await vrfCoordinatorV2Mock.fulfillRandomWords(
          requestNftReceipt.events[1].args.requestId,
          randomIpfsNft.address
        );
      } catch (e) {
        console.log(e);
        reject(e);
      }
    });
  });
});

[RohanNero]

I updated it to include the function I was trying to cover inside of RandomIpfsNft, but I now see that what I was trying to do was redundant since the nftMinted event emits the dogOwner address anyway. Thank you!