React Router V6 - useNavigate() 只能在一个上下文中使用<router>零件</router>

Question

我已经安装了 react-router-domV6。 当我使用 Jest-Enzyme 运行我的非常基本的测试时，我遇到了上述错误：

expect(shallow(<CustomerListTable customers={mockCustomers} />).length).toEqual(1);

我已经遇到过这里提到的类似问题，但我已经在做提供的答案。 甚至尝试import { BrowserRouter as Router } from "react-router-dom"; . 我在这里想念什么？

index.js

import React, { Suspense } from "react";
import ReactDOM from "react-dom";
import App from "./App";
import { StrictMode } from "react";
import { BrowserRouter } from "react-router-dom";
...

ReactDOM.render(
  <StrictMode>
          ...
            <BrowserRouter>
              <AuthProvider>
                <App />
              </AuthProvider>
            </BrowserRouter>
          ...
  </StrictMode>,
  document.getElementById("root")
);

应用程序.js

import React from "react";
import { useRoutes } from "react-router-dom";
import Routing from "./routes";
import useAuth from "./hooks/useAuth";
import { CreateCustomTheme } from "./theme";
import { ThemeProvider } from "@mui/material/styles";
import CssBaseline from "@mui/material/CssBaseline";
import useSettings from "./hooks/useSettings";
import useScrollReset from "./hooks/useScrollReset";
import SplashScreen from "./components/splashScreen/SplashScreen";

const App = () => {
  const content = useRoutes(Routing());
  const { settings } = useSettings();
  const auth = useAuth();

  useScrollReset();

  const theme = CreateCustomTheme({
    direction: settings.direction,
    responsiveFontSizes: settings.responsiveFontSizes,
    roundedCorners: settings.roundedCorners,
    theme: settings.theme,
  });
  return (
    <ThemeProvider theme={theme}>
      <CssBaseline />
      {auth.isInitialized ? content : <SplashScreen />}
    </ThemeProvider>
  );
};

export default App;

Answer 1

您正在隔离测试的CustomerListTable组件似乎无法访问它所期望的路由上下文，就像它在应用程序中正常呈现时一样。 使用提供组件正在访问的特定 React Context 值的提供程序（redux、主题/样式、本地化、路由等）测试组件时，需要包装组件是完全正常的，通常通过 React 挂钩。

对于单元测试，您应该将组件与它期望的提供者一起包装。

expect(shallow(
  <BrowserRouter>
    <CustomerListTable customers={mockCustomers} />
  </BrowserRouter>
).length).toEqual(1);

自从我使用 Enzyme 已经很长时间了，所以我不确定shallow渲染是否仍然有效，但如果它不起作用，则切换到全mount测试渲染器。

Answer 2

要解决此问题，您可以在编写测试用例的文件的所有导入之前直接模拟您的 useNavigate() ：-

const mockedUsedNavigate = jest.fn();
jest.mock('react-router-dom', () => ({
   ...jest.requireActual('react-router-dom'),
  useNavigate: () => mockedUsedNavigate,
}));