Question

我是jasmine和coffee的新手。

我的问题对其他人来说很熟悉，但事实并非如此。

请查看我的代码段

咖啡代码

$scope.changeText = ->
  $timeout $scope.changeText, 5000
  id = parseInt(Math.random() * 4)
  switch id
    when 0
      $scope.home.banner.mainHead =  'Some Heading'
      $scope.home.banner.subHead =  'Some more text'
    when 1
      $scope.home.banner.mainHead =  'Some other Heading'
      $scope.home.banner.subHead =  'Some more text'
    when 2
      $scope.home.banner.mainHead =  'Another Heading'
      $scope.home.banner.subHead =  'Another Text'
    when 3
      $scope.home.banner.mainHead =  'Another Heading 1'
      $scope.home.banner.subHead =  'Text text text'

  return
$timeout($scope.changeText, 5000)

如何开始在茉莉花中编写测试用例？

提前谢谢。

Answer 1

您的代码段问题在于它会生成随机id，因此无法确定性地进行测试。但是，您可以测试的是mainHead和subHead是否相应地更改了id。因此，我会将该代码段拆分为带有switch语句和其余语句的可测试函数：

COFFEE：

getBanner = (id) -> 
    banner = {}

    switch id
        when 0
            banner.mainHead = "Some Heading"
            banner.subHead  = "Some more text"
        when 1
            banner.mainHead = "Some other Heading"
            banner.subHead  = "Some more text"
        when 2
            banner.mainHead = "Another Heading"
            banner.subHead  = "Another text"
        when 3
            banner.mainHead = "Another Heading 1"
            banner.subHead  = "Text text text"

    banner

$scope.changeText = ->
    id = parseInt(Math.random() * 4)
    $scope.home.banner = getBanner(id)

# $interval might be better in your use case than $timeout
$interval $scope.changeText, 5000

测试：

describe "getBanner", ->

    it "should return mainHead/subHead", ->
        banner = getBanner(0)
        expect(banner.mainHead).toEqual("Some Heading")
        expect(banner.subHead).toEqual("Some more text")

        banner = getBanner(1)
        # ...

    it "should return empty banner on wrong id", ->
        # testing edge cases
        banner = getBanner(-1)
        expect(Object.keys(banner).length).toEqual(0)

如何在茉莉花和咖啡中编写开关盒的单元测试

1 个答案: