HOW TO WRITE TIME DEPENDENT TEST WITH HARDHAT?

To write time-dependent tests with hardhat, the “evm_increasetime” and “evm_mine” functions of the hardhat ethers plugin are used.

Steps:

1. Import Hardhat and Hardhat Ethers plugins
const { ethers } = require("hardhat")
const hre = require("hardhat")

2. Define the below mentioned functions

3. Call the functions in tests

1. Manipulating EVM via Increasing Block Timestamp

async function increaseTime(amount) {
await hre.network.provider.send("evm_increaseTime", [amount])
console.log("EVM time " + amount + " seconds increased!")
}

2. Manipulating EVM via Mining Blocks

async function mineBlocks(amount) {
for (let i = 0; i < amount; i++) {
await hre.network.provider.send("evm_mine")
}
console.log(amount + " Blocks Mined!")
}