Smart contract testing in solidity is done using Javascript testing frameworks Mocha and Chai. Installing a smart contract environment using Hardhat or Truffle comes with a test folder.

Truffle & hardhat(has inbuilt node.js) are like NPM & YARN or Web3js & Ether.js. You use one on a project. With programming, if you know the basics of certain things or languages it will be easy to familiarize yourself with another. Javascript is a prerequisite for learning solidity.

• Smart contract ABI
• Frontend skills and integration skills(Web3js & Etherjs) to know this you need to understand smart contract development.
• interpret the problem, think of architecture, draft on a whiteboard before moving to logic. Feed your eyes with many smart contracts, logic is just presenting solutions in code. People who see don’t write logic that doesn’t eat memory.
• google how to improve programming logic.