solana-program-examples/basics/hello-solana/seahorse/hello_solana/tests/hello_solana.ts

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

describe("hello_solana", () => {

  // Configure the client to use the local cluster.
  const provider = anchor.AnchorProvider.env();
  anchor.setProvider(provider);
  const program = anchor.workspace.HelloSolana as anchor.Program<HelloSolana>;
  const payer = provider.wallet as anchor.Wallet;

  it("Say hello!", async () => {

    // Just run Anchor's IDL method to build a transaction
    // and sign it via a signer.
    await program.methods.hello()
        .accounts({
          signer: provider.wallet.publicKey,
        })
        .signers([payer.payer])
        .rpc();
  });
});