Unit testing 单元测试VueJS Karma Mocha ExpectJS nextTick不工作

我有一个带有密码字段的简单表单。如果密码输入字段为空，则显示此范围：

<span id='password-required' v-show='!validation.password'>Required</span>

（失败的测试将被注释掉。）

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我发现解决方案是将密码数据传递到组件构造函数中，因为它像这样绑定到输入标记

let thePassword = '123'

// Extend the component to get the constructor, which we can then initialize directly.
const Constructor = Vue.extend(Signup)
const component = new Constructor({
  propsData: {
    emailentry: email
  },
  data: {
    password: thePassword        
  }
}).$mount()

现在测试正在进行中

let thePassword = '123'

// Extend the component to get the constructor, which we can then initialize directly.
const Constructor = Vue.extend(Signup)
const component = new Constructor({
  propsData: {
    emailentry: email
  },
  data: {
    password: thePassword        
  }
}).$mount()