Getting unexpected error while writing test for smart contract

[DeadmanAbir]

Hey guys I am writing tests for a NFT Markeplace smart contract, I have two contracts one for Marketplace and one for a basic ERC721 NFT. So while I am writing test I have a listNFT function in the Marketplace contract, now the problem is that the List Nft function checks for approval of token that is the token is approved for listing or not, while calling the function I am already calling the _approve() function from the ERC721 openzeppelin, but still the test fails and says that The NFT is not approved for listing, can anyone help me solving the problem?

Code- https://github.com/DeadmanAbir/NFT-Marketplace

[adityabhattad2021]

_approve() is an internal function and cannot be called from outside the contract. Try replacing it with approve() function as it is a public function and is allowed to be called externally.

[DeadmanAbir]

Hey I have also tried using the approve() function but it doesn't work, still getting the same problem

[krakxn]

Have you tried using a custom-error instead? As so:

if (nft.getApproved(tokenId) != address(this)) {
            revert NotApprovedForMarketplace();
        }

Do not forget to add the NotApprovedForMarketplace above though, as so

error NotApprovedForMarketplace();

[DeadmanAbir]

Hey same problem the problem is not from require or custom error statement, the error is from the approve function

[krakxn]

Most likely, the above should fix it.

[DeadmanAbir]

Hey got the problem the problem was in the listNFT function where I am checking for approving the nft address and not the marketplace address.