Question

我是学生，所以我对Node.js和异步编程都很陌生。我正在开发一个带有测试模块的API项目。我的一个模块（seed.js）连接到mongodb数据库并将数据播种到数据库中。一旦数据被播种，我就会在（test.js）中运行测试。

除了我正在处理的test.js文件中的错误之外，我有一个我想要解决的问题，部分是为了美观，但我也担心我的测试可能会在播种完成之前开始运行。我怀疑可能是因为我的控制台输出如下：

```

dougs-mbp:fsjsProject11 doug5solas$ npm test

> fsjsProject11@0.0.0 test /Users/doug5solas/training/treehouse/fsjsProjects/fsjsProject11
> export NODE_ENV=test || SET "NODE_ENV=test" && mocha test/test.js



  [---USER routes---]
    POST /api/users
Successfully initialized mongoose-seed
Connected to: mongodb://localhost:27017/CourseRateAPITest and seeding files
[ 'models/user.js', 'models/review.js', 'models/course.js' ]
Reviews collection cleared
Users collection cleared
Courses collection cleared
Successfully created document [0] of Review model
Successfully created document [2] of Review model
Successfully created document [1] of Review model
Successfully created document [1] of User model
Successfully created document [2] of User model
Successfully created document [1] of Course model
Successfully created document [0] of Course model
Successfully created document [0] of User model
      1) should create a user with complete information
      2) should reject a user with incomplete information
      3) should reject a user with a duplicate emailAddress
    GET /api/users
      4) should return a user with credentialed information
      5) should reject a user that is unauthorized


  0 passing (10s)
  5 failing

  1) [---USER routes---]
       POST /api/users
         should create a user with complete information:
     Error: Timeout of 2000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves.


  2) [---USER routes---]
       POST /api/users
         should reject a user with incomplete information:
     Error: Timeout of 2000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves.


  3) [---USER routes---]
       POST /api/users
         should reject a user with a duplicate emailAddress:
     Error: Timeout of 2000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves.


  4) [---USER routes---]
       GET /api/users
         should return a user with credentialed information:
     Error: Timeout of 2000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves.


  5) [---USER routes---]
       GET /api/users
         should reject a user that is unauthorized:
     Error: Timeout of 2000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves.




npm ERR! Test failed.  See above for more details.

```

正如您所看到的，播种开始（连接消息），然后我从测试模块获得3行输出，然后是其余的播种输出，最后用测试输出完成。

我想要做的是在任何测试开始之前看到种子功能完成。我已经包含了两个要点的链接，seed.js和test.js.

seed.js https://gist.github.com/dhawkinson/2e83c2bdbe9af8c9f26ab5b675e8d714

test.js https://gist.github.com/dhawkinson/728fd190b9a0730a3c1e6e75a802b201

我知道test.js目前无法正常工作，但我现在仍在努力解决这个问题。

我关心的是种子和测试之间的执行顺序。

感谢。

Answer 1

由于seed.js似乎导出将在播种完成后解析的承诺，因此应该可以将describe块包含在test.js中，如下所示：

seed.then(() => {
  // Describe, etc...
});

我认为更典型的Mocha方式是使用调用before的异步seed hook。

如何控制Node.js应用程序中模块的执行顺序

1 个答案: