用茉莉花测试骨干关系

Question

更新：

我有一个简单的骨干关系模型：

@App.M.Product = Backbone.RelationalModel.extend
    defaults: {}
    url: App.D.dataURL
    relations: [
        {
            type: Backbone.HasMany
            key: 'templates'
            relatedModel: 'App.M.Template'
            collectionType: 'App.C.Templates'
            reverseRelation:
                key: 'product'
        }
        {
            type: Backbone.HasMany
            key: 'pages'
            relatedModel: 'App.M.Page'
            collectionType: 'App.C.Pages'
            reverseRelation:
                key: 'product'
        }
        {
            type: Backbone.HasMany
            key: 'uploaded_images'
            relatedModel: 'App.M.UploadedImage'
            collectionType: 'App.C.UploadedImages'
            reverseRelation:
                key: 'product'
        }
    ]
    initialize: ->
        if @get('minimumNumberOfPages') < 1
            @set 'minimumNumberOfPages', 1
    fixPages: ->
        col = @get 'pages'
        col.each (page) ->
            page.collection = col

还有一个更简单的测试套件：

"use strict"

describe 'Product', ->
    pr = null
    beforeEach ->
        pr = new App.M.Product
    it 'should be defined', ->
        expect(pr).toBeDefined()

但是，该模型未能初始化(取自testem的终端输出)：

TypeError: Cannot read property 'prototype' of undefined
    at Backbone.HasMany.Backbone.Relation.extend.initialize (http://localhost:7357/app/bower_components/backbone-relational/backbone-relational.js:835:78)
    at Backbone.Relation (http://localhost:7357/app/bower_components/backbone-relational/backbone-relational.js:537:9)
    at new child (http://localhost:7357/app/bower_components/backbone/backbone-min.js:1:25220)
    at _.extend.initializeRelation (http://localhost:7357/app/bower_components/backbone-relational/backbone-relational.js:137:5)
    at null.<anonymous> (http://localhost:7357/app/bower_components/backbone-relational/backbone-relational.js:1176:31)
    at Array.forEach (native)
    at Function.w.each.w.forEach (http://localhost:7357/app/bower_components/underscore/underscore-min.js:1:599)
    at Backbone.RelationalModel.Backbone.Model.extend.initializeRelations (http://localhost:7357/app/bower_components/backbone-relational/backbone-relational.js:1175:6)
    at Backbone.RelationalModel.Backbone.Model.extend.set (http://localhost:7357/app/bower_components/backbone-relational/backbone-relational.js:1373:11)
    at Backbone.Model (http://localhost:7357/app/bower_components/backbone/backbone-min.js:1:3929)

为什么会这样呢？该应用程序唤醒正确，测试不正确。

Answer 1

所以错误是ReferenceError: product is not defined。这是因为您在测试中的before函数和中定义了它，因此两者是不相同的，而在测试中则是未定义的。您必须在描述块中定义它：

“严格使用”

描述“产品”，->积= null

beforeEach ->
    product = new App.M.Product

it 'should be defined', ->
    expect(product).toBeDefined()

对于另一个错误TypeError: Cannot read property 'prototype' of undefined，您似乎错过了添加collectionType中提到的集合。因此，插件在全局命名空间中寻找App.C.Pages，并尝试获取对象的原型。但是正如错误说的，它没有被定义