React native 如何测试使用react-i18next的react本机组件?
我正在尝试使用jest开始测试一个已建立的RN应用程序。大多数组件都用react-i18next提供的名称空间包装在React native 如何测试使用react-i18next的react本机组件?,react-native,jestjs,react-i18next,React Native,Jestjs,React I18next,我正在尝试使用jest开始测试一个已建立的RN应用程序。大多数组件都用react-i18next提供的名称空间包装在中 运行测试时,出现以下错误: FAIL tests/setting.test.js ● Test suite failed to run TypeError: Cannot read property 'type' of undefined 4 | 5 | i18n > 6 | .use(initReactI18ne
中
运行测试时,出现以下错误:
FAIL tests/setting.test.js
● Test suite failed to run
TypeError: Cannot read property 'type' of undefined
4 |
5 | i18n
> 6 | .use(initReactI18next)
| ^
7 | .init({
8 | fallbackLng: 'en',
9 | resources: {
at I18n.use (node_modules/i18next/dist/commonjs/i18next.js:260:16)
at Object.<anonymous> (config/i18nForTest.js:6:1)
at Object.<anonymous> (tests/setting.test.js:5:43)
然后写了一些测试:
import 'react-native';
import React from 'react';
import renderer from 'react-test-renderer';
import {I18nextProvider} from 'react-i18next';
import i18n from 'config/i18nForTest';
import Settings from 'containers/Settings';
it('Does Settings renders correctly?', () => {
const tree = renderer
.create(
<I18nextProvider i18n={i18n}>
<Settings t= {key => key} />
</I18nextProvider>,
)
.toJSON();
expect(tree).toMatchSnapshot();
});
导入“react native”;
从“React”导入React;
从“反应测试渲染器”导入渲染器;
从'react-I18nextProvider'导入{I18nextProvider};
从'config/i18nForTest'导入i18n;
从“容器/设置”导入设置;
它('设置是否正确呈现?',()=>{
常量树=渲染器
.创造(
密钥}/>
,
)
.toJSON();
expect(tree.toMatchSnapshot();
});
您可以在package.json中找到我的jest配置:
"jest": {
"setupFiles": ["<rootDir>/jest.setup.js"],
"preset": "react-native",
"testMatch": [
"<rootDir>/tests/**/*.test.js?(x)",
"<rootDir>/src/**/*.test.js"
],
"transformIgnorePatterns": ["node_modules/(?!(@react-native-community|react-navigation|react-native))"
],
"transform": {
"^.+\\.(js)$": "<rootDir>/node_modules/react-native/jest/preprocessor.js"
}
},
“笑话”:{
“setupFiles”:[“/jest.setup.js”],
“预设”:“反应本机”,
“测试匹配”:[
“/tests/***.test.js?(x)”,
“/src/***.test.js”
],
“transformIgnorePatterns”:[“节点_模块/(?!(@react-native社区| react-navigation | react-native))”
],
“转变”:{
“^.+\.(js)$”:“/node\u modules/react native/jest/preprocessor.js”
}
},
谢谢我终于找到了解决问题的办法。
我认为文档中提供的测试示例是针对v10的,我使用的是v9。
因此,我修改了i18n配置测试以使用reactI18nextModule
,因此现在是这样的:
import i18n from 'i18next';
import { initReactI18next } from 'react-i18next';
import { reactI18nextModule } from 'react-i18next';
i18n
.use(reactI18nextModule)
.init({
fallbackLng: 'en',
resources: {
en: {},
fr: {}
},
// have a common namespace used around the full app
ns: ['translations'],
defaultNS: 'translations',
debug: true,
interpolation: {
escapeValue: false, // not needed for react!!
},
});
export default i18n;
之后,我可以在测试组件中省略i18nProvider,如下所示:
import 'react-native';
import React from 'react';
import renderer from 'react-test-renderer';
import {I18nextProvider} from 'react-i18next';
import i18n from 'config/i18nForTest';
import {Settings} from 'containers/Settings'; // to get redux connected component import Setting without {}
it('Does Settings renders correctly?', () => {
const tree = renderer
.create(
<Settings t={key => key} />
)
.toJSON();
expect(tree).toMatchSnapshot();
});
导入“react native”;
从“React”导入React;
从“反应测试渲染器”导入渲染器;
从'react-I18nextProvider'导入{I18nextProvider};
从'config/i18nForTest'导入i18n;
从“容器/设置”导入{Settings};//在不使用{}的情况下获取redux连接的组件导入设置
它('设置是否正确呈现?',()=>{
常量树=渲染器
.创造(
密钥}/>
)
.toJSON();
expect(tree.toMatchSnapshot();
});
import 'react-native';
import React from 'react';
import renderer from 'react-test-renderer';
import {I18nextProvider} from 'react-i18next';
import i18n from 'config/i18nForTest';
import {Settings} from 'containers/Settings'; // to get redux connected component import Setting without {}
it('Does Settings renders correctly?', () => {
const tree = renderer
.create(
<Settings t={key => key} />
)
.toJSON();
expect(tree).toMatchSnapshot();
});