metamask-extension/test/lib/render-helpers.js

import React from 'react';
import { Provider } from 'react-redux';
import { render } from '@testing-library/react';
import { mount } from 'enzyme';
import { MemoryRouter } from 'react-router-dom';
import PropTypes from 'prop-types';
import { LegacyI18nProvider } from '../../ui/app/contexts/i18n';

export function mountWithRouter(component, store = {}, pathname = '/') {
  // Instantiate router context
  const router = {
    history: new MemoryRouter().history,
    route: {
      location: {
        pathname,
      },
      match: {},
    },
  };

  const createContext = () => ({
    context: {
      router,
      t: (str) => str,
      metricsEvent: () => undefined,
      store,
    },
    childContextTypes: {
      router: PropTypes.object,
      t: PropTypes.func,
      metricsEvent: PropTypes.func,
      store: PropTypes.object,
    },
  });

  const Wrapper = () => (
    <MemoryRouter initialEntries={[{ pathname }]} initialIndex={0}>
      {component}
    </MemoryRouter>
  );

  return mount(<Wrapper />, createContext());
}

export function renderWithProvider(component, store) {
  const Wrapper = () =>
    store ? (
      <Provider store={store}>
        <MemoryRouter initialEntries={['/']} initialIndex={0}>
          <LegacyI18nProvider>{component}</LegacyI18nProvider>
        </MemoryRouter>
      </Provider>
    ) : (
      <LegacyI18nProvider>{component}</LegacyI18nProvider>
    );

  return render(<Wrapper />);
}