Mongoose 不会删除数据库并在 Mocha 中正确关闭连接

Question

我有两个简单的测试，但其中一个通过了，但另一个没有通过，因为架构再次被编译。

OverwriteModelError: Cannot overwrite CheckStaging model once compiled.

这是我通过的一项测试，因为它是运行第一。

var mongoose = require('mongoose'),
    StagingManager = require('../lib/staging_manager'),
    expect = require('expect.js');

describe('Staging manager', function() {

    var StagingModel;
    beforeEach(function(done) {
        mongoose.connect('mongodb://localhost/BTest');
        StagingModel = new StagingManager(mongoose).getStaging();
        done();
    });

    describe('find one', function() {
        it('should insert to database', function(done) {
            // Do some test which works fine
        });
    });

    afterEach(function (done) {
        mongoose.connection.db.dropDatabase(function () {
            mongoose.connection.close(function () {
                done();
            });
        });
    });
});

这是失败的测试

var StagingUtil = require('../lib/staging_util'),
    StagingManager = require('../lib/staging_manager'),
    mongoose = require('mongoose');

describe('Staging Util', function() {
    var stagingUtil, StagingModel;

    beforeEach(function(done) {
        mongoose.connect('mongodb://localhost/DBTest');
        StagingModel = new StagingManager(mongoose).getStaging();
        stagingUtil = new StagingUtil(StagingModel);
        done();
    });

    describe('message contains staging', function() {
        it('should replace old user with new user', function(done) {
            // Do some testing 
        });
    });

    afterEach(function (done) {
        mongoose.connection.db.dropDatabase(function () {
            mongoose.connection.close(function () {
                done();
            });
        });
    });


});

这是我的舞台经理

var Staging = function(mongoose) {
    this.mongoose = mongoose;
};

Staging.prototype.getStaging = function() {
    return this.mongoose.model('CheckStaging', {
        user: String,
        createdAt: { type: Date, default: Date.now }
    });
};

module.exports = Staging;

Answer 1

mongoose.model 向 Mongoose 注册一个模型，因此您应该只调用一次而不是每次调用 getStaging 时。为您的分期模型尝试这样的事情：

var mongoose = require('mongoose');
var StagingModel = new mongoose.Schema({
    user: String,
    createdAt: { type: Date, default: Date.now }
});

mongoose.model('CheckStaging', StagingModel);

然后在你的消费代码中，使用

var mongoose = require('mongoose');
require('../lib/staging_manager');
var StagingModel = mongoose.model('CheckStaging');

require 只会执行一次，所以模型应该只用 mongoose 注册一次。

顺便说一句，对于单元测试，mockgoose 是一个出色的模拟 mongoose 的模拟库 - 值得研究！

Mongoose 不会删除数据库并在 Mocha 中正确关闭连接

Mongoose doesn't drop database and close connection properly in Mocha

javascript

asynchronous

mocha.js

mongodb

node.js