solana-program-examples/basics/create-account/anchor/tests/test.ts

import * as anchor from "@coral-xyz/anchor"
import { CreateSystemAccount } from "../target/types/create_system_account"
import { Keypair, SystemProgram } from "@solana/web3.js"
import { assert } from "chai"

describe("Create a system account", () => {
  const provider = anchor.AnchorProvider.env()
  anchor.setProvider(provider)
  const wallet = provider.wallet as anchor.Wallet
  const connection = provider.connection
  const program = anchor.workspace
    .CreateSystemAccount as anchor.Program<CreateSystemAccount>

  it("Create the account", async () => {
    // Generate a new keypair for the new account
    const newKeypair = new Keypair()

    await program.methods
      .createSystemAccount()
      .accounts({
        payer: wallet.publicKey,
        newAccount: newKeypair.publicKey,
        systemProgram: SystemProgram.programId,
      })
      .signers([newKeypair])
      .rpc()

    // Minimum balance for rent exemption for new account
    const lamports = await connection.getMinimumBalanceForRentExemption(0)

    // Check that the account was created
    const accountInfo = await connection.getAccountInfo(newKeypair.publicKey)
    assert((accountInfo.owner = SystemProgram.programId))
    assert(accountInfo.lamports === lamports)
  })
})