0

我正在使用客户的遗留代码，它是一个用于 Jasmine 测试的 node.js 项目。我的问题是，当我运行测试时，被调用的函数（在不同的文件中）找不到/查看使用导入文件的特定方法require

例子：

文件1.js

const file2 = require('./file2');

fdescribe('Login', file2.login);

文件2.js

const Api = require('./api');

module.exports = {
  login() {
    let user;
    beforeAll(async () => {
     user = await Api.createUser({
      first_name: 'login test',
      password: 'XXXX',
      },
      Api.USER_ROLE.ADMIN);
    // more code within function...
    });
  // other functions
}

通过 IDE (VSCode)，所有路径都是完整的，并且可以跟随“转到定义”。另外作为测试，我将登录功能的内容放入 file1.js 的描述块中，更新依赖关系，一切正常。但是我的老板和客户希望保持目前的结构。

当我按此处所示运行时，我收到以下警告：

(node:6021) Warning: Accessing non-existent property 'createUser' of module exports inside circular dependency
(node:6021) Warning: Accessing non-existent property 'USER_ROLE' of module exports inside circular dependency

代码运行但出现“无法读取未定义的属性”错误createUser和USER_ROLE。
我知道警告提到了循环依赖，但据我所知，没有，即只有 1->2->Api-> 等。

当从 file1.js 调用 file2.js 中的函数时，似乎 file2.js 中的 require 没有发生。

在没有更多高级支持的情况下，我相当初级/缺乏经验，因此我在这里伸出援手，这可能是一个相当简单的问题。

项目正在运行node version 14.17.0

Api.js 文件更像是一个库文件，它“链接”到在这种情况下包含的其他文件createUser和USER_ROLE.
[因为这是遗留的客户端代码，它在过去的某个时候工作过，我认为这可能与 Jasmine 或 Node JS 版本有关？]

节点警告/错误的更多详细信息：

(node:1693) Warning: Accessing non-existent property 'createUser' of module exports inside circular dependency
    at emitCircularRequireWarning (internal/modules/cjs/loader.js:675:11)
    at Object.get (internal/modules/cjs/loader.js:689:5)
    at UserContext.<anonymous> (/home/runner/work/platform-validation/platform-validation/utils/dupes.js:45:24)
    at QueueRunner.attempt (/home/runner/work/platform-validation/platform-validation/node_modules/jasmine-core/lib/jasmine-core/jasmine.js:7756:40)
    at QueueRunner.run (/home/runner/work/platform-validation/platform-validation/node_modules/jasmine-core/lib/jasmine-core/jasmine.js:7798:25)
  SYS.20: Login
    ✗ User can login
      - TypeError: Cannot read property 'login' of undefined
    at runNext (/home/runner/work/platform-validation/platform-validation/node_modules/jasmine-core/lib/jasmine-core/jasmine.js:7715:18)
    at next (/home/runner/work/platform-validation/platform-validation/node_modules/jasmine-core/lib/jasmine-core/jasmine.js:7722:11)
    at QueueRunner.onComplete (/home/runner/work/platform-validation/platform-validation/node_modules/jasmine-core/lib/jasmine-core/jasmine.js:7615:9)
    at Immediate.<anonymous> (/home/runner/work/platform-validation/platform-validation/node_modules/jasmine-core/lib/jasmine-core/jasmine.js:7814:12)
    at processImmediate (internal/timers.js:464:21)
(node:1693) Warning: Accessing non-existent property 'USER_ROLE' of module exports inside circular dependency
    at emitCircularRequireWarning (internal/modules/cjs/loader.js:675:11)
    at Object.get (internal/modules/cjs/loader.js:689:5)
    at UserContext.<anonymous> (/home/runner/work/platform-validation/platform-validation/utils/dupes.js:49:11)
    at QueueRunner.attempt (/home/runner/work/platform-validation/platform-validation/node_modules/jasmine-core/lib/jasmine-core/jasmine.js:7756:40)
    at QueueRunner.run (/home/runner/work/platform-validation/platform-validation/node_modules/jasmine-core/lib/jasmine-core/jasmine.js:7798:25)
    at runNext (/home/runner/work/platform-validation/platform-validation/node_modules/jasmine-core/lib/jasmine-core/jasmine.js:7715:18)
    at next (/home/runner/work/platform-validation/platform-validation/node_modules/jasmine-core/lib/jasmine-core/jasmine.js:7722:11)
    at QueueRunner.onComplete (/home/runner/work/platform-validation/platform-validation/node_modules/jasmine-core/lib/jasmine-core/jasmine.js:7615:9)
    at Immediate.<anonymous> (/home/runner/work/platform-validation/platform-validation/node_modules/jasmine-core/lib/jasmine-core/jasmine.js:7814:12)
    at processImmediate (internal/timers.js:464:21)
4

1 回答 1

0

解决方案是添加：
delete require.cache[require.resolve('./api')]
在这与 Node 缓存 require() 调用有关之前const Api = require('./api');，file2.js

而不是像预期的那样重新调用。

有关更多说明，请参见链接：

如何在 node.js 中的“require”之后删除模块？

node.js 需要（）缓存 - 可能无效？

于 2021-07-27T15:03:41.777 回答