React Router V6 - useNavigate() 只能在 <Router> 组件的上下文中使用

Question

我已经安装了react-router-domV6。当我使用 Jest-Enzyme 运行非常基本的测试时，出现上述错误：

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了。甚至尝试做import { BrowserRouter as Router } from "react-router-dom";. 我在这里缺少什么？

索引.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

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后直接模拟您的 useNavigate() ：-

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

Answer 2

您正在单独CustomerListTable测试的组件似乎无法访问它在应用程序中正常呈现时所期望的路由上下文。在使用提供者（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，这些提供者通常通过 React hooks 提供组件正在访问的特定 React Context 值。

对于单元测试，您应该使用组件期望拥有的提供程序来包装该组件。

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

我已经很长时间没有使用 Enzyme 了，所以我不确定shallow渲染是否仍然有效，但如果不能，则切换到完整的mount测试渲染器。