React Navigation：如何测试使用 withNavigation HOC 的组件？

Question

我正在使用 Jest 为我的 React Native 应用程序编写单元测试。我有一个组件，它被包裹在withNavigationHOC 中。

我的问题是我的测试崩溃，抛出：

? LoginScreen component › given no props: should render a login form

    Invariant Violation: withNavigation can only be used on a view hierarchy of a navigator. The wrapped component is unable to get access to navigation from props or context.

我正在使用@testing-library/react-native我的测试，我设置了一个自定义渲染方法，如下所示：

import { render } from '@testing-library/react-native';
import React from 'react';
import { NavigationContext } from 'react-navigation';
import { Provider } from 'react-redux';

import store from '../src/store';

const WithProviders = ({ children }) => {
  return (
    <Provider store={store}>
      <NavigationContext.Provider>{children}</NavigationContext.Provider>
    </Provider>
  );
};

const customRender = (ui, options) =>
  render(ui, {
    wrapper: WithProviders,
    ...options,
  });

export * from '@testing-library/react-native';

export { customRender as render };

这适用于 Redux 上下文，但不适用于导航提供程序。

如何测试封装在withNavigationHOC 中的组件？

更新：

我尝试了这样的建议答案：

jest.mock('react-navigation', () => ({
  withNavigation: Component => props => <Component {...props} />,
}));

afterAll(() => {
  jest.restoreAllMocks();
});

但这不起作用。我收到错误：

Invariant Violation: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component from the file it's defined in, or you might have mixed up default and named imports.

Answer 1

根据 Kubilay 的回答，我是这样解决的：

jest.mock('react-navigation', () => ({
  withNavigation: Component => props => (
    <Component navigation={{ navigate: jest.fn() }} {...props} />
  ),
  SafeAreaView: ({ children }) => <>{children}</>,
}));

afterAll(() => {
  jest.restoreAllMocks();
});

我不得不嘲笑withNavigation和SafeAreaView。

这仍然是一种非常不满意的方式。如果有人知道如何在自定义渲染方法中注入正确的 React Navigation 提供程序，我将非常感激。

理想情况下，应该有一种方法来配置将内容包装在容器中的自定义渲染器。这是我如何使用 Redux 做到这一点。

import { render } from '@testing-library/react-native';
import React from 'react';
import { Provider } from 'react-redux';

import configureStore from '../src/redux/store.js';

const store = configureStore();

const WithProviders = ({ children }) => (
  <Provider store={store}>{children}</Provider>
);

const customRender = (ui, options) =>
  render(ui, { wrapper: WithProviders, ...options });

export * from '@testing-library/react-native';

export { customRender as render };