Hardhat testing setup in Blockchain / Solidity - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is Hardhat in blockchain development?

Hardhat is a development environment to compile, deploy, test, and debug Ethereum software. It helps developers write smart contracts and test them locally.

beginner

Which command initializes a new Hardhat project?

The command npx hardhat starts the Hardhat project setup wizard, which helps create the project structure and configuration files.

beginner

What file contains the configuration for Hardhat testing?

The hardhat.config.js file contains settings for the Hardhat environment, including network configurations and plugins for testing.

intermediate

How do you write a simple test in Hardhat using Mocha and Chai?

You write tests inside the test/ folder using JavaScript. Use describe blocks to group tests and it blocks for individual tests. Use expect from Chai to check results.

beginner

What command runs the tests in a Hardhat project?

Use npx hardhat test to run all tests in the test/ directory. This runs your smart contract tests locally.

Which folder typically contains Hardhat test files?

A test/

B src/

C contracts/

D scripts/

Hardhat test files are usually placed in the test/ folder.

What library is commonly used with Hardhat for assertions in tests?

A Lodash

B React

C Express

D Chai

Chai is a popular assertion library used with Hardhat tests.

Which command initializes a Hardhat project?

A hardhat start

B npm install hardhat

C npx hardhat

D node hardhat.js

Running npx hardhat starts the project setup wizard.

What does npx hardhat test do?

A Runs all tests in the test folder

B Compiles smart contracts

C Deploys contracts to mainnet

D Starts a local blockchain node

It runs all the tests written in the test/ directory.

Which file configures Hardhat settings?

A package.json

B hardhat.config.js

C index.js

D truffle-config.js

The hardhat.config.js file holds Hardhat configuration.

Explain the steps to set up a basic Hardhat testing environment from scratch.

Think about commands, folder structure, and test writing.

Describe how you write a simple test for a smart contract function using Hardhat and Chai.

Focus on test structure and assertion.