Add ReactDOMClient to ServerIntegrationBasic

packages/react-dom/src/__tests__/ReactDOMServerIntegrationBasic-test.js

@@ -15,21 +15,21 @@ const ReactDOMServerIntegrationUtils = require('./utils/ReactDOMServerIntegratio
 const TEXT_NODE_TYPE = 3;
 
 let React;
-let ReactDOM;
+let ReactDOMClient;
 let ReactDOMServer;
 let ReactTestUtils;
 
 function initModules() {
  // Reset warning cache.
  jest.resetModules();
  React = require('react');
- ReactDOM = require('react-dom');
+ ReactDOMClient = require('react-dom/client');
  ReactDOMServer = require('react-dom/server');
  ReactTestUtils = require('react-dom/test-utils');
 
  // Make them available to the helpers.
  return {
- ReactDOM,
+ ReactDOMClient,
  ReactDOMServer,
  ReactTestUtils,
  };
@@ -149,8 +149,10 @@ describe('ReactDOMServerIntegration', () => {
  expect(await render([])).toBe(null);
  expect(await render(false)).toBe(null);
  expect(await render(true)).toBe(null);
- expect(await render(undefined)).toBe(null);
  expect(await render([[[false]], undefined])).toBe(null);
+
+ // hydrateRoot errors for undefined children.
+ expect(await render(undefined, 1)).toBe(null);
  });
  });
 });