OpenHands/frontend/test-utils.tsx

// See https://redux.js.org/usage/writing-tests#setting-up-a-reusable-test-render-function for more information

import React, { PropsWithChildren } from "react";
import { Provider } from "react-redux";
import { configureStore } from "@reduxjs/toolkit";
// eslint-disable-next-line import/no-extraneous-dependencies
import { RenderOptions, render } from "@testing-library/react";
import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
import { I18nextProvider } from "react-i18next";
import i18n from "i18next";
import { initReactI18next } from "react-i18next";
import { AppStore, RootState, rootReducer } from "./src/store";
import { AuthProvider } from "#/context/auth-context";
import { UserPrefsProvider } from "#/context/user-prefs-context";

// Initialize i18n for tests
i18n
  .use(initReactI18next)
  .init({
    lng: "en",
    fallbackLng: "en",
    ns: ["translation"],
    defaultNS: "translation",
    resources: {
      en: {
        translation: {},
      },
    },
    interpolation: {
      escapeValue: false,
    },
  });

const setupStore = (preloadedState?: Partial<RootState>): AppStore =>
  configureStore({
    reducer: rootReducer,
    preloadedState,
  });

// This type interface extends the default options for render from RTL, as well
// as allows the user to specify other things such as initialState, store.
interface ExtendedRenderOptions extends Omit<RenderOptions, "queries"> {
  preloadedState?: Partial<RootState>;
  store?: AppStore;
}

// Export our own customized renderWithProviders function that creates a new Redux store and renders a <Provider>
// Note that this creates a separate Redux store instance for every test, rather than reusing the same store instance and resetting its state
export function renderWithProviders(
  ui: React.ReactElement,
  {
    preloadedState = {},
    // Automatically create a store instance if no store was passed in
    store = setupStore(preloadedState),
    ...renderOptions
  }: ExtendedRenderOptions = {},
) {
  function Wrapper({ children }: PropsWithChildren<object>): JSX.Element {
    return (
      <Provider store={store}>
        <UserPrefsProvider>
          <AuthProvider>
            <QueryClientProvider client={new QueryClient()}>
              <I18nextProvider i18n={i18n}>
                {children}
              </I18nextProvider>
            </QueryClientProvider>
          </AuthProvider>
        </UserPrefsProvider>
      </Provider>
    );
  }
  return { store, ...render(ui, { wrapper: Wrapper, ...renderOptions }) };
}