solana-program-examples/basics/cross-program-invocation/anchor/tests/test.ts

import * as anchor from "@project-serum/anchor";
import { Hand } from "../target/types/hand";
import { Lever } from "../target/types/lever";

describe("CPI Example", () => {
  
  const provider = anchor.AnchorProvider.env();
  anchor.setProvider(provider);
  const hand = anchor.workspace.Hand as anchor.Program<Hand>;
  const lever = anchor.workspace.Lever as anchor.Program<Lever>;

  const powerAccount = anchor.web3.Keypair.generate();

  it("Initialize the lever!", async () => {
    
    await lever.methods.initialize()
    .accounts({
      power: powerAccount.publicKey,
      user: provider.wallet.publicKey,
      systemProgram: anchor.web3.SystemProgram.programId,
    })
    .signers([powerAccount])
    .rpc();

  });

  it("Pull the lever!", async () => {

    await hand.methods.pullLever("Chris")
    .accounts({
      power: powerAccount.publicKey,
      leverProgram: lever.programId,
    })
    .rpc();

  });

  it("Pull it again!", async () => {

    await hand.methods.pullLever("Ashley")
    .accounts({
      power: powerAccount.publicKey,
      leverProgram: lever.programId,
    })
    .rpc();

  });
});