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 { AppStore, RootState, rootReducer } from "./src/store";

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}>{children}</Provider>;
  }
  return { store, ...render(ui, { wrapper: Wrapper, ...renderOptions }) };
}