anchor/examples/tutorial/basic-0/tests/basic-0.js

const anchor = require('@project-serum/anchor');
const fs = require('fs');

describe('basic-0', () => {

  // Configure the client to use the local cluster.
  anchor.setProvider(anchor.Provider.local());

  it('Uses the workspace to invoke the initialize instruction', async () => {
    // #region code
    // Read the deployed program from the workspace.
    const program = anchor.workspace.Basic0;

    // Execute the RPC.
    await program.rpc.initialize();
   // #endregion code
  });
});