我如何在玩笑中模仿RESPECT-I18NEXT和I18n.js?

mi7gmzs6  于 2022-09-21  发布在  React
关注(0)|答案(3)|浏览(160)

Package.json

"moduleNameMapper": {
  "i18next": "<rootDir>/__mocks__/i18nextMock.js"
}

I18n.js

import i18n from 'i18next'
import XHR from 'i18next-xhr-backend'
// import Cache from 'i18next-localstorage-cache'
import LanguageDetector from 'i18next-browser-languagedetector'

i18n
  .use(XHR)
  // .use(Cache)
  .use(LanguageDetector)
  .init({
    fallbackLng: 'en',
    // wait: true, // globally set to wait for loaded translations in translate hoc
    lowerCaseLng: true,
    load: 'languageOnly',
    // have a common namespace used around the full app
    ns: ['common'],
    defaultNS: 'common',
    debug: true,

    // cache: {
    //   enabled: true
    // },

    interpolation: {
      escapeValue: false, // not needed for react!!
      formatSeparator: ',',
      format: function (value, format, lng) {
        if (format === 'uppercase') return value.toUpperCase()
        return value
      }
    }
  })

export default i18n

I18nextMock.js

/* global jest */
const i18next = jest.genMockFromModule('react-i18next')
i18next.t = (i) => i
i18next.translate = (c) => (k) => k

module.exports = i18next

出于某种原因,JEST单元测试没有得到组件。

下面是一个单元测试:

import React from 'react'
import { Provider } from 'react-redux'
import { MemoryRouter } from 'react-router-dom'
import { mount } from 'enzyme'

import { storeFake } from 'Base/core/storeFake'
import Container from '../container'

describe('MyContainer (Container) ', () => {
  let Component;

  beforeEach(() => {
    const store = storeFake({})

    const wrapper = mount(
      <MemoryRouter>
        <Provider store={store}>
          <Container />
        </Provider>
      </MemoryRouter>
    )

    Component = wrapper.find(Container)
  });

  it('should render', () => {
    // Component is undefined here
    expect(Component.length).toBeTruthy()
  })
})
pkmbmrz7

pkmbmrz71#

您不需要模拟t函数,只需要translate函数。对于第二种情况,参数的用法令人困惑,而且还需要返回一个组件。

我能够让它在我的项目中发挥作用。以下是我的模拟文件和Jest配置

JEST配置

"moduleNameMapper": {
    "react-i18next": "<rootDir>/__mocks__/reacti18nextMock.js"
}

模拟react-i18next的源代码

/* global jest */
import React from 'react'

const react_i18next = jest.genMockFromModule('react-i18next')

const translate = () => Component => props => <Component t={() => ''} {...props} />

react_i18next.translate = translate

module.exports = react_i18next
o7jaxewo

o7jaxewo2#

我在我的玩笑测试中使用了Atemu的Anwser,但在模拟测试中以以下一行结束:

module.exports = {t: key => key};

我还修改了jest配置,因为我从‘i18next’导入了‘t’:

"moduleNameMapper": {
    "i18next": "<rootDir>/__mocks__/reacti18nextMock.js"
}
inkz8wg9

inkz8wg93#

在我的例子中,使用带有TypeScrip的useTransaction挂钩,如下所示:

const reactI18Next: any = jest.createMockFromModule('react-i18next');

reactI18Next.useTranslation = () => {
  return {
    t: (str: string) => str,
    i18n: {
      changeLanguage: () => new Promise(() => {}),
    },
  };
};

module.exports = reactI18Next;

export default {};

jest.config.ts

const config: Config.InitialOptions = {
  verbose: true,
  moduleNameMapper: {
    'react-i18next': '<rootDir>/__mocks__/react-i18next.ts',
  },
};

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