节点模块导出，访问不存在的属性错误，Jasmine

Question

我正在处理客户遗留代码，这是一个用于 Jasmine 测试的 node.js 项目。我的问题是，当我运行测试被调用函数（在不同的文件中）时，无法 find/see 使用 require

导入到文件中的特定方法

示例：

file1.js

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

fdescribe('Login', file2.login);

file2.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)所有的路径都是完整的，可以跟随'go to definition'。同样作为测试，我将登录功能的内容放入 file1.js 中的 describe 块中，更新依赖关系，一切正常。但是我的老板和客户希望保留当前的结构。

当我运行如此处所示时，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s 但 createUser 和 USER_ROLE 有 'cannot read property of undefined' 个错误。
我知道警告提到了循环依赖，但据我所知有 none 即只有 1->2->Api-> 等

从 file1.js 调用 file2.js 中的函数时，file2.js 中的要求似乎没有发生。

我相当 junior/inexperienced 没有更多的高级支持，因此我来到这里，因为这可能是一个相当简单的问题。

项目运行宁 node version 14.17.0

Api.js 文件更像是一个库文件，'links' 与本例中包含的其他文件 createUser 和 USER_ROLE。
[因为这是遗留客户端代码并且它在过去的某个时间点工作，我认为它可能与 Jasmine 或 Node JS 版本有关？]

节点的更多详细信息warnings/errors：

(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)

Answer 1

解决方案是添加：
delete require.cache[require.resolve('./api')]
在 file2.js
中的 const Api = require('./api'); 之前
这与节点缓存 require() 调用而不是按预期重新调用有关。

查看链接以获取更多说明：

How to remove module after "require" in node.js?

node.js require() cache - possible to invalidate?

节点模块导出，访问不存在的属性错误，Jasmine

node module exports, Accessing non-existent property error, Jasmine

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节点模块导出，访问不存在的 属性 错误，Jasmine

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节点模块导出，访问不存在的属性错误，Jasmine