solana-program-examples/basics/processing-instructions/anchor/tests/test.ts

import * as anchor from '@coral-xyz/anchor';
import type { ProcessingInstructions } from '../target/types/processing_instructions';

describe('custom-instruction-data', () => {
  const provider = anchor.AnchorProvider.env();
  anchor.setProvider(provider);
  const program = anchor.workspace.ProcessingInstructions as anchor.Program<ProcessingInstructions>;

  it('Go to the park!', async () => {
    // Again, Anchor makes it super simple.
    //
    await program.methods.goToPark('Jimmy', 3).accounts({}).rpc();
    await program.methods.goToPark('Mary', 10).accounts({}).rpc();
  });
});