solana-program-examples/basics/close-account/steel/tests/close-account.test.ts

import { describe, test } from 'node:test';
import { PublicKey, Transaction } from '@solana/web3.js';
import { start } from 'solana-bankrun';
import { createCloseUserInstruction, createCreateUserInstruction } from '../ts';

describe('Close Account!', async () => {
  const PROGRAM_ID = new PublicKey('z7msBPQHDJjTvdQRoEcKyENgXDhSRYeHieN1ZMTqo35');
  const context = await start([{ name: 'close_account_program', programId: PROGRAM_ID }], []);
  const client = context.banksClient;
  const payer = context.payer;

  const testAccountPublicKey = PublicKey.findProgramAddressSync([Buffer.from('USER'), payer.publicKey.toBuffer()], PROGRAM_ID)[0];

  test('Create the account', async () => {
    const blockhash = context.lastBlockhash;
    const ix = createCreateUserInstruction(payer.publicKey, testAccountPublicKey, PROGRAM_ID, 'Jacob');

    const tx = new Transaction();
    tx.recentBlockhash = blockhash;
    tx.add(ix).sign(payer);

    await client.processTransaction(tx);
  });

  test('Close the account', async () => {
    const blockhash = context.lastBlockhash;

    const ix = createCloseUserInstruction(payer.publicKey, testAccountPublicKey, PROGRAM_ID);
    const tx = new Transaction();
    tx.recentBlockhash = blockhash;
    tx.add(ix).sign(payer);

    await client.processTransaction(tx);
  });
});