metaplex-program-library VS mocha

You can also check out the program but I'm actively working on porting metaplex auction house as the backbone. A "BOYNC" version of the MPL Auction House will soon follow.

All NFT modifications must happen through the Bubblegum program.

My auction contract required doing some Metaplex metadata checks, so testing required creating an NFT just like they do in mainnet. However, your localnet doesn't come with the program deployed so you have to set that up yourself. Clone https://github.com/metaplex-foundation/metaplex-program-library and run anchor build inside the token-metadata directory. This will output a target/deploy/mpl_token_metadata.so binary that you can import into your project.

[1]: https://github.com/metaplex-foundation/metaplex-program-libr...

Using something like Vitest, Jest, or Mocha didn't work because:

MochaJS is a feature-rich JavaScript test framework running on Node.js, making it a popular choice for both backend and frontend testing. It's known for its flexibility and straightforward syntax, allowing for asynchronous testing and the use of any assertion library.

We use Jest Framework for testing. Jest is not a dogma, and, of course, in its place can be any other test runner, such as Mocha or Ava. Let's focus on tests. I'll provide a short example because I don’t want to waste your time. You can find the full version here. It's crucial to read the comments in the code below. Let's go!

JavaScript Popular tools for testing: Mocha, Jasmine, Unit JS, Jest

To execute your tests, you can create test scripts using popular testing frameworks like Mocha, Jasmine, or Jest. These frameworks provide a structured way to organize and run your tests, report results, and handle assertions.

⚗️ Mocha and Chai for testing

Testing frameworks like Jest, Mocha, and Jasmine are crucial for software development, ensuring code reliability and correctness. They offer features like test suites, test cases, assertions, and asynchronous testing support.