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";

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();
  });
});