Coffeescript 使用茉莉花'；s`beforeach`方法

我想让Jasmine的安装和拆卸方法适合我。 我一定是用错了，因为我无法在安装后让变量保持在范围内

不起作用：

describe 'classes/model', ->
  beforeEach ->
    model = new Model()
  describe 'the basics', ->
    it 'extends Backbone.Model', ->
      expect(model).toBeInstanceOf Model # Fails. 'model is not defined'

describe 'classes/model', ->
  describe 'the basics', ->
    beforeEach ->
      model = new Model()
    it 'extends Backbone.Model', ->
      expect(model).toBeInstanceOf Model # Fails. 'model is not defined'

我想也许设置必须在描述的范围内。但这也不起作用：

describe 'classes/model', ->
  beforeEach ->
    model = new Model()
  describe 'the basics', ->
    it 'extends Backbone.Model', ->
      expect(model).toBeInstanceOf Model # Fails. 'model is not defined'

describe 'classes/model', ->
  describe 'the basics', ->
    beforeEach ->
      model = new Model()
    it 'extends Backbone.Model', ->
      expect(model).toBeInstanceOf Model # Fails. 'model is not defined'

工作。（但不使用设置便利性）

---

我是不是做错了什么事，在每次之前都会阻止它工作？

找到了。或许应该早点注意到：） 必须注意CoffeeScript管理变量作用域的方式，以实现这一点

describe 'classes/model', ->
  model = null # get it in scope
  beforeEach ->
    model = new Model()
  describe 'the basics', ->
    it 'extends Backbone.Model', ->
      expect(model).toBeInstanceOf Model

---

找到了。或许应该早点注意到：） 必须注意CoffeeScript管理变量作用域的方式，以实现这一点

describe 'classes/model', ->
  model = null # get it in scope
  beforeEach ->
    model = new Model()
  describe 'the basics', ->
    it 'extends Backbone.Model', ->
      expect(model).toBeInstanceOf Model