本文介绍了使用带有 Jest 的 react-navigation 的测试组件的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在开发一个也使用 Redux 的 React Native 应用程序,我想用 Jest 编写测试.我无法模拟 react-navigation 添加的导航"道具.
I'm working on a React Native application that also use Redux and I want to write tests with Jest. I'm not able to mock the "navigation" prop that is added by react-navigation.
这是我的组件:
import React from 'react';
import { connect } from 'react-redux';
import PropTypes from 'prop-types';
import { Text, View } from 'react-native';
const Loading = (props) => {
if (props.rehydrated === true) {
const { navigate } = props.navigation;
navigate('Main');
}
return (
<View>
<Text>Loading...</Text>
</View>
);
};
Loading.propTypes = {
rehydrated: PropTypes.bool.isRequired,
navigation: PropTypes.shape({
navigate: PropTypes.func.isRequired,
}).isRequired,
};
const mapStateToProps = state => ({
rehydrated: state.rehydrated,
});
export default connect(mapStateToProps)(Loading);
加载组件作为屏幕添加到 DrawerNavigator.
The Loading component is added as a screen to a DrawerNavigator.
这里是测试:
import React from 'react';
import renderer from 'react-test-renderer';
import mockStore from 'redux-mock-store';
import Loading from '../';
describe('Loading screen', () => {
it('should display loading text if not rehydrated', () => {
const store = mockStore({
rehydrated: false,
navigation: { navigate: jest.fn() },
});
expect(renderer.create(<Loading store={store} />)).toMatchSnapshot();
});
});
当我运行测试时,出现以下错误:
When I run the test, I get the following error:
Warning: Failed prop type: The prop `navigation` is marked as required in `Loading`, but its value is `undefined`.
in Loading (created by Connect(Loading))
in Connect(Loading)
知道如何模拟导航属性吗?
Any idea on how to mock the navigation property?
推荐答案
尝试通过 props 直接传递navigation
:
Try to pass navigation
directly via props:
it('should display loading text if not rehydrated', () => {
const store = mockStore({
rehydrated: false,
});
const navigation = { navigate: jest.fn() };
expect(renderer.create(<Loading store={store} navigation={navigation} />)).toMatchSnapshot();
});
这篇关于使用带有 Jest 的 react-navigation 的测试组件的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!