测试失败 -> 无法读取未定义的属性（读取“rpc”）

Question

我正在用 TypeScript 编写一个用于添加两个数字的测试。我收到以下错误：

Adds two numbers:
     TypeError: Cannot read properties of undefined (reading 'rpc')
      at Context.<anonymous> (tests/calculator.ts:33:19)
      at Generator.next (<anonymous>)
      at /mnt/e/solana/calculator/tests/calculator.ts:7:71
      at new Promise (<anonymous>)
      at __awaiter (tests/calculator.ts:3:12)
      at Context.<anonymous> (tests/calculator.ts:35:16)
      at processImmediate (node:internal/timers:473:21)

以下是代码：

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

describe('calculator',() => {

    const provider = Anchor.Provider.local();
    Anchor.setProvider(provider);
    
    const calculator = Anchor.web3.Keypair.generate();
    const program = Anchor.workspace.calculator;
    var _calculator;
it('Creates a calculator', async() => {
        await program.rpc.create("Welcome to My calculator",{
            accounts: {
                calculator: calculator.publicKey,
                user: provider.wallet.publicKey,
                SystemProgram: SystemProgram.programId,
            },
            signers: [calculator]
        });
        const account = await 
        program.account.calculator.fetch(calculator.publicKey);
        assert.ok(account.greeting === "Welcome to My calculator");
        _calculator = calculator;
    });

这是使用anchor-cli 在 Solana 区块链上进行的工作。有人可以帮忙吗？

Answer 1

program

未定义。这意味着这行代码有问题

 const program = Anchor.workspace.calculator;

Anchor 合约名称大写。所以应该是“计算器”

 const program = Anchor.workspace.Calculator;

Answer 2

从 @project-serum/anchor 导入 AnchorProvider 并将提供程序分配给它，例如：

const provider = AnchorProvider.local()

我认为这应该可以解决问题。如果您的 systemProgram 出现错误，请以类似的方式从锚点导入 web3。

Answer 3

转到此

../target/types/calculator

目录并确保其导出为

export type Calculator = {

任何类型的改变都会导致无法定义

program