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

import * as anchor from "@project-serum/anchor";
import { CreateSystemAccount } from "../target/types/create_system_account";


describe("Create a system account", () => {

  const provider = anchor.AnchorProvider.env();
  anchor.setProvider(provider);
  const wallet = provider.wallet as anchor.Wallet;
  const program = anchor.workspace.CreateSystemAccount as anchor.Program<CreateSystemAccount>;

  it("Create the account", async () => {

    const newKeypair = anchor.web3.Keypair.generate();
    
    await program.methods.createSystemAccount()
    .accounts({
      payer: wallet.publicKey,
      newAccount: newKeypair.publicKey,
      systemProgram: anchor.web3.SystemProgram.programId
    })
    .signers([wallet.payer, newKeypair])
    .rpc();

  });
});