無法連接從摩卡測試

Question

從REPL連接到MongoDB的正常工作：

> var mongoose=require('mongoose'); 
undefined 
> mongoose.connect('mongodb://localhost/test', function(error) { 
... console.log('connected\n%s\n', error); 
... }); 

回報：

{ connections: 
    [ { base: [Circular], 
     collections: {}, 
     models: {}, 
     replica: false, 
     hosts: null, 
     host: 'localhost', 
     port: 27017, 
     user: undefined, 
     pass: undefined, 
     name: 'test', 
     options: [Object], 
     _readyState: 2, 
     _closeCalled: false, 
     _hasOpened: false, 
     _listening: false, 
     _events: {}, 
     db: [Object] } ], 
    plugins: [], 
    models: {}, 
    modelSchemas: {}, 
    options: {} } 
> connected # Yes! 
undefined 

但從摩卡測試套件連接不工作：

var mongoose = require('mongoose'); 
console.log('connecting...'); 

mongoose.connect('mongodb://localhost/test', function(error) { 
    if(error) console.error('Error while connecting:\n%\n', error); 

    console.log('connected'); 
}); 

回報：

$ mocha 
connecting... 



    0 passing (0 ms) 

有誰知道爲什麼這不起作用？

Answer 1

你的套件中有任何測試嗎？如果不是這樣，貓鼬有機會連接之前，似乎摩卡會退出。摩卡頁面上列出的功能之一是

auto-exit to prevent "hanging" with an active loop

這可能與它有關。您可以嘗試在測試套件的before方法中連接到貓鼬，例如

describe('test suite', function() { 
    before(function(done) { 
     mongoose.connect('mongodb://localhost/test', function(error) { 
      if (error) console.error('Error while connecting:\n%\n', error); 
      console.log('connected'); 
      done(error); 
     }); 
    }); 
});