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[WIP] Unify default lane with sync lane #25438

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9 changes: 9 additions & 0 deletions packages/jest-react/src/internalAct.js
Original file line number Diff line number Diff line change
Expand Up @@ -105,6 +105,11 @@ export function act<T>(scope: () => Thenable<T> | T): Thenable<T> {
let didFlushWork;
do {
didFlushWork = Scheduler.unstable_flushAllWithoutAsserting();

// Flush scheduled rAF.
if (global.flushRequestAnimationFrameQueue) {
global.flushRequestAnimationFrameQueue();
}
} while (didFlushWork);
return {
then(resolve, reject) {
Expand Down Expand Up @@ -143,6 +148,10 @@ function flushActWork(resolve, reject) {
// $FlowFixMe: Flow doesn't know about global Jest object
jest.runOnlyPendingTimers();
if (Scheduler.unstable_hasPendingWork()) {
// Flush scheduled rAF.
if (global.flushRequestAnimationFrameQueue) {
global.flushRequestAnimationFrameQueue();
}
// Committing a fallback scheduled additional work. Continue flushing.
flushActWork(resolve, reject);
return;
Expand Down
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