失敗的測試：無法讀取未定義的屬性（讀取本地）solana de.net

Question

您好，我正在嘗試在錨點中測試我的第一個文件，但它一直出現此錯誤，我得到的錯誤是：

TypeError: Cannot read properties of undefined (reading 'local')
    at Suite.<anonymous> (/home/benny/mycalcdapp/tests/mycalcdapp.ts:6:36)
    at Object.create (/home/benny/mycalcdapp/node_modules/mocha/lib/interfaces/common.js:148:19)
    at context.describe.context.context (/home/benny/mycalcdapp/node_modules/mocha/lib/interfaces/bdd.js:42:27)
    at Object.<anonymous> (/home/benny/mycalcdapp/tests/mycalcdapp.ts:5:1)
    at Module._compile (node:internal/modules/cjs/loader:1105:14)
    at Module.m._compile (/home/benny/mycalcdapp/node_modules/ts-node/src/index.ts:439:23)
    at Module._extensions..js (node:internal/modules/cjs/loader:1159:10)

.ts 文件進行測試：

const assert = require('assert');
const anchor = require('@project-serum/anchor');
const { SystemProgram } = anchor.web3;

describe('mycalcdapp', () => {
  const provider = anchor.Provider.local();
  anchor.setProvider(provider);
  const calculator = anchor.web3.Keypair.generate();
  const program = anchor.workspace.mycalcdapp;

  it('creates a calculator', async () => {
    await program.rpc.create('Welocme to solana', {
      accounts: {
        calculator: calculator.publicKey,
        user: provider.wallet.publicKey,
        system_program: SystemProgram.programId,
      },
      signers: [calculator],
    });
    const account = await program.account.calculator.fetch(
      calculator.publicKey
    );
    assert.ok(account.greeting === 'Welcome to solana');
  });
});

我已經看到另一個類似的關於無法讀取 rpc 的 stackoverflow postv，但也沒有得到回答:(

Answer 1

所以我必須從 @project-serum/anchor 導入 AnchorProvider 和 web3，除了導入 * 作為錨點。 然后我們將提供程序設置為const provider = AnchorProvider.local()還將const {SystemProgram } = anchor.web3為const {SystemProgram } = web3並更改帳戶內的 system_program > create rpc to systemProgram ，瞧我們的測試工作！ 完整的測試代碼：

import assert from 'assert';
import * as anchor from '@project-serum/anchor';
import { AnchorProvider, web3 } from '@project-serum/anchor';
const { SystemProgram } = web3;

describe('mycalcdapp', () => {
  const provider = AnchorProvider.local();
  anchor.setProvider(provider);
  const calculator = anchor.web3.Keypair.generate();
  const program = anchor.workspace.Mycalcdapp;

  it('creates a calculator', async () => {
    await program.rpc.create('Welcome to solana', {
      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 solana');
  });
});

Answer 2

我認為您代碼中的主要問題是您的 dapp 的名稱。

 const program = anchor.workspace.mycalcdapp;

你的工作區名稱應該用大寫字母初始化

 const program = anchor.workspace.Mycalcdapp;

同樣在“it”塊中welcome拼寫錯誤

await program.rpc.create('Welocme to solana', {