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有什么方法可以对 IPFS 的基本功能进行单元测试，特别是IPFS.create()？我正在使用 TypeScript 和 Jest。我总是遇到两个错误。首先我得到：Error: digest should be a Uint8Array在<project-dri>/node_modules/multihashing-async/node_modules/multihashes/src/index.js:132:11at <project-dir>/node_modules/multihashing-async/src/sha.js:54:22)。如果我在已使用此错误调用它之后运行任何使用的测试，IPFS.create()则会出现另一个错误：LockExistsError: Lock already being held for file: ~/.jsipfs/repo.lock at Object.<anonymous>.exports.lock (<project-dir>/node_modules/ipfs-repo/src/lock.js:37:13) { code: 'ERR_LOCK_EXISTS' }.

const ipfsCreateMemo: IpfsCreateMemo = {};

export async function useNode(
    callback = async (node: Object) => { },
    errorCallback = async (err: Error) => { },
    props = {}
) {
    const memo = String(Object.entries(props)) || 'useNode';

    try {
        if (memo in ipfsCreateMemo === false) {
            // There is no way to get to the next line of code
            // The following line triggers every error
            ipfsCreateMemo[memo] = await IPFS.create();
        }

        await callback(ipfsCreateMemo[memo]);
        ipfsCreateMemo[memo].close();
    } catch (e) {
        console.log(e);
        errorCallback(e);
    }
}

export async function getLatest() {
  return await useNode(async (node) => {
      return node.refs.local();
  });
}

// the test
test("Read the latest", async () => {
    const mockGetLatest = jest.fn(async () => await getLatest());

    await mockGetLatest();

    expect(mockGetLatest).toHaveReturned();
});

我已经能够从我的网络应用程序中毫无错误地调用这些方法，但前提是我在调用它们之前等待几秒钟。我了解 IPFS 可能会受到其类似 alpha 的条件的限制。有什么方法可以进行工作单元测试吗？尽管如此？

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