recoil/cjs/hooks/__tests__/Recoil_useRecoilBridgeAcrossReactRoots-test.js.flow

Recoil - A state management library for React

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @emails oncall+recoil
 * @flow strict-local
 * @format
 */
'use strict';

import type { StoreID } from '../../core/Recoil_Keys';

const {
  getRecoilTestFn
} = require('recoil-shared/__test_utils__/Recoil_TestingUtils');

let React, renderElements, renderUnwrappedElements, useEffect, useRef, reactMode, act, RecoilRoot, useRecoilStoreID, atom, componentThatReadsAndWritesAtom, useRecoilBridgeAcrossReactRoots;
const testRecoil = getRecoilTestFn(() => {
  React = require('react');
  ({
    useEffect,
    useRef
  } = React);
  ({
    act
  } = require('ReactTestUtils'));
  ({
    reactMode
  } = require('../../core/Recoil_ReactMode'));
  ({
    renderElements,
    renderUnwrappedElements,
    componentThatReadsAndWritesAtom
  } = require('recoil-shared/__test_utils__/Recoil_TestingUtils'));
  ({
    RecoilRoot,
    useRecoilStoreID
  } = require('../../core/Recoil_RecoilRoot'));
  atom = require('../../recoil_values/Recoil_atom');
  useRecoilBridgeAcrossReactRoots = require('../Recoil_useRecoilBridgeAcrossReactRoots');
});
declare function NestedReactRoot(arg0: any): any;
testRecoil('useRecoilBridgeAcrossReactRoots - create a context bridge', async ({
  concurrentMode
}) => {
  // Test fails with useRecoilBridgeAcrossReactRoots() and useMutableSource().
  // It only reproduces if act() is used in renderElements() for the nested
  // root, so it may just be a testing environment issue.
  if (concurrentMode && reactMode().mode === 'MUTABLE_SOURCE') {
    return;
  }

  const myAtom = atom({
    key: 'useRecoilBridgeAcrossReactRoots - context bridge',
    default: 'DEFAULT'
  });
  declare function initializeState(arg0: any): any;
  const [ReadWriteAtom, setAtom] = componentThatReadsAndWritesAtom(myAtom);
  const container = renderElements(<RecoilRoot initializeState={initializeState}>
        <ReadWriteAtom />

        <NestedReactRoot>
          <ReadWriteAtom />
        </NestedReactRoot>
      </RecoilRoot>);
  expect(container.textContent).toEqual('"INITIALIZE""INITIALIZE"');
  act(() => setAtom('SET'));
  expect(container.textContent).toEqual('"SET""SET"');
});
testRecoil('StoreID matches bridged store', () => {
  declare function RecoilStoreID(arg0: {
    storeIDRef: {
      current: ?StoreID
    }
  }): any;
  const rootStoreIDRef = {
    current: null
  };
  const nestedStoreIDRef = {
    current: null
  };
  const c = renderElements(<>
      <RecoilStoreID storeIDRef={rootStoreIDRef} />
      <NestedReactRoot>
        <RecoilStoreID storeIDRef={nestedStoreIDRef} />
      </NestedReactRoot>
      RENDER
    </>);
  expect(c.textContent).toEqual('RENDER');
  expect(rootStoreIDRef.current).toBe(nestedStoreIDRef.current);
  expect(rootStoreIDRef.current).not.toBe(null);
});