sample-test.js

const { expect } = require("chai");
const { ethers } = require("hardhat");

describe("Transactions", function () {
  let transactions
  beforeEach( async()=>{
    const Transactions = await ethers.getContractFactory("Transactions");
    transactions = await Transactions.deploy();
  })
  it("Should reject zero address", async function () {
   
    // await transactions.deployed();
    const zeroAddress = ethers.ZeroAddress
    // await expect(transactions.addToBlockchain(zeroAddress, 300,"message", "keyword")).to.be.revertedWithCustomError(transactions,"Transactions__InvalidReceiver")
      // Note: Changed the error checking syntax
      await expect(
        transactions.addToBlockchain(
          ethers.constants.AddressZero, // Invalid address
          100, "Hello", "Test"
        )
      ).to.be.revertedWith("Invalid receiver address");
  });
  it("Should reject zero amount", async function () {
    const Transactions = await ethers.getContractFactory("Transactions");
     transactions = await Transactions.deploy();
    // await transactions.deployed();
    const zeroAddress = ethers.ZeroAddress
    // await expect(transactions.addToBlockchain(zeroAddress, 300,"message", "keyword")).to.be.revertedWithCustomError(transactions,"Transactions__InvalidReceiver")
      // Note: Changed the error checking syntax
      const address = "0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266"
      await expect(
        transactions.addToBlockchain(
          address, 
          0, "Hello", "Test"
        )
      ).to.be.revertedWith("Amount must be greater than 0");
  });
});