vue3 测试库 - 如何在测试中使用 globalProperties

Question

我是 Vue 的新手，并遵循了使用 vue 测试库的建议。唯一的问题是我似乎无法找到一种方法将我的代码注入渲染函数中的 globalProperties。

有人知道我可以注入或模拟它的示例吗？

main.js

app.config.globalProperties.$globals = globalMethods

...
const app = createApp(App)
app.config.globalProperties.$globals = globalMethods
app.config.globalProperties.$globalVars = globalVars

app.component("font-awesome-icon", fontawesome)

app.use(applicationStore);
app.use (Hotjar, hotjarConfig)
app.use(i18n)
app.use(router)

app.mount('#app')

从我创建的 vue 组件我可以调用

Component.vue

let formatedObj = this.$globals.maskValues(this.inputValue, this.inputType, this);

...  
  ,
  created() {
    let formatedObj = this.$globals.maskValues(this.inputValue, this.inputType, this);
    this.myInputValue = formatedObj.formatedString;
    this.formatedCharacterCount = formatedObj.formatedCharacterCount;
    this.prevValue = this.myInputValue;
  },
...

tesst.spec.js

import { render } from '@testing-library/vue'
import FormatedNumericInput from '@/components/Component.vue'
import {globalMethods} from'@/config/global-methods'


const label = 'Price'
const initSettings = {
  props: {
    inputId: 'testInputId1',
    labelTxt: label
  }
};

beforeEach(() => {
});

test('a simple string that defines your test', () => {

  const { getByLabelText } = render(FormatedNumericInput, initSettings)
  const input = getByLabelText(label)
  
  // testing logic
  expect(input != null).toBe(true)
  expect(FormatedNumericInput != null).toBe(true)

})

** 错误 **

TypeError: Cannot read property 'maskValues' of undefined

      85 |   },
      86 |   created() {
    > 87 |     let formatedObj = this.$globals.maskValues(this.inputValue, this.inputType, this);
         |                                     ^
      88 |     this.myInputValue = formatedObj.formatedString;
      89 |     this.formatedCharacterCount = formatedObj.formatedCharacterCount;
      90 |     this.prevValue = this.myInputValue;

      at Proxy.created (src/components/FormatedNumericInput.vue:87:37)

Answer 1

second argument of render() is passed to @vue/test-utils mount(), so you could include the global.mocks mounting option 模拟 $globals.maskValues:

const { getByLabelText } = render(FormatedNumericInput, {
  ...initSettings,
  global: {
    mocks: {
      $globals: {
        maskValues: (inputValue, inputType) => {
          const formatedString = globalFormatValue(inputValue) // declared elsewhere
          return {
            formatedString,
            formatedCharacterCount: formatedString.length,
          }
        }
      }
    }
  }
})

vue3 测试库 - 如何在测试中使用 globalProperties

vue3 testing library - How to use globalProperties in tests

vue.js

vuejs3

testing-library

vue-testing-library