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

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

describe('Close Account!', async () => {
  const PROGRAM_ID = PublicKey.unique();
  const context = await start(
    [{ name: 'close_account_native_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(
      testAccountPublicKey,
      payer.publicKey,
      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(
      testAccountPublicKey,
      payer.publicKey,
      PROGRAM_ID
    );
    const tx = new Transaction();
    tx.recentBlockhash = blockhash;
    tx.add(ix).sign(payer);

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