title: Testing backbone-relational with jasmine
body: <p><strong>UPDATED:</strong></p>
  
  <p>I have a simple Backbone-relational model:</p>
  
  <pre><code>@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: -&gt;
          if @get('minimumNumberOfPages') &lt; 1
              @set 'minimumNumberOfPages', 1
      fixPages: -&gt;
          col = @get 'pages'
          col.each (page) -&gt;
              page.collection = col
  </code></pre>
  
  <p>and an even simplier test suite:</p>
  
  <pre><code>"use strict"
  
  describe 'Product', -&gt;
      pr = null
      beforeEach -&gt;
          pr = new App.M.Product
      it 'should be defined', -&gt;
          expect(pr).toBeDefined()
  </code></pre>
  
  <p>However, the model fails to initialize (taken from testem's terminal output):</p>
  
  <pre><code>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.&lt;anonymous&gt; (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)
  </code></pre>
  
  <p>Why is that? The app is wokring correctly, the tests are not.</p>