chore: add single versioned implementation of act for DevTools tests

packages/react-devtools-shared/src/__tests__/utils.js

@@ -7,13 +7,17 @@
  * @flow
  */
 
+import semver from 'semver';
+
 import typeof ReactTestRenderer from 'react-test-renderer';
 
 import type {FrontendBridge} from 'react-devtools-shared/src/bridge';
 import type Store from 'react-devtools-shared/src/devtools/store';
 import type {ProfilingDataFrontend} from 'react-devtools-shared/src/devtools/views/Profiler/types';
 import type {ElementType} from 'react-devtools-shared/src/frontend/types';
 
+import {ReactVersion} from '../../../../ReactVersions';
+
 export function act(
   callback: Function,
   recursivelyFlush: boolean = true,
@@ -73,6 +77,48 @@ export async function actAsync(
   }
 }
 
+const requestedReactVersion = process.env.REACT_VERSION || ReactVersion;
+export async function actImplementation(callback: Function): Promise<void> {
+  // This is for React < 18, where act was distributed in react-dom/test-utils.
+  if (semver.lt(requestedReactVersion, '18.0.0')) {
+    return require('react-dom/test-utils').act(callback);
+  }
+
+  const React = require('React');
+  // This is for React 18, where act was distributed in react as unstable.
+  if (React.unstable_act) {
+    return React.unstable_act(callback);
+  }
+
+  // This is for React > 18, where act is marked as stable.
+  if (React.act) {
+    return React.act(callback);
+  }
+
+  throw new Error("Couldn't find any available act implementation");
+}
+
+export async function actModern(callback: Function): Promise<void> {
+  const {act: actTestRenderer} = require('react-test-renderer');
+
+  // act from react-test-renderer has some side effects on React DevTools
+  // it injects the renderer for DevTools, see ReactTestRenderer.js
+  await actImplementation(() => {
+    actTestRenderer(() => {
+      callback();
+    });
+  });
+
+  // Flush Bridge operations
+  while (jest.getTimerCount() > 0) {
+    await actImplementation(() => {
+      actTestRenderer(() => {
+        jest.runAllTimers();
+      });
+    });
+  }
+}
+
 export function beforeEachProfiling(): void {
   // Mock React's timing information so that test runs are predictable.
   jest.mock('scheduler', () => jest.requireActual('scheduler/unstable_mock'));