vue/test/unit/specs/directives/class_spec.js

var _ = require('../../../../src/util')
var def = require('../../../../src/directives/class')

if (_.inBrowser) {
  describe('v-class', function () {

    var el
    beforeEach(function () {
      el = document.createElement('div')
    })

    it('with className', function () {
      el.className = 'haha'
      var dir = _.extend({
        el: el,
        arg: 'test'
      }, def)
      dir.update(true)
      expect(el.className).toBe('haha test')
      dir.update(false)
      expect(el.className).toBe('haha')
    })

    it('without className', function () {
      el.className = 'haha'
      var dir = _.extend({ el: el }, def)
      dir.update('test')
      expect(el.className).toBe('haha test')
      dir.update('what')
      expect(el.className).toBe('haha what')
      dir.update()
      expect(el.className).toBe('haha')
    })

    it('object value', function () {
      el.className = 'hoho'
      var dir = _.extend({ el: el }, def)
      dir.update({
        a: true,
        b: false
      })
      expect(el.className).toBe('hoho a')
      dir.update({
        b: true
      })
      expect(el.className).toBe('hoho b')
      dir.update(null)
      expect(el.className).toBe('hoho')
    })

  })
}