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Resubmit Add HydrationSyncLane (#25711)
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## Summary
Submit #25698 again after fixing
the devtools regression tests in CI.
The PR changed lanes representation and some snapshot tests of devtools
captures lanes. In devtools tests for older versions, the updated lanes
representation no longer matched. The fix is to disable regression tests
for those tests.

## How did you test this change?

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Demonstrate the code is solid. Example: The exact commands you ran and
their output, screenshots / videos if the pull request changes the user
interface.
How exactly did you verify that your PR solves the issue you wanted to
solve?
  If you leave this empty, your PR will very likely be closed.
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```
./scripts/circleci/download_devtools_regression_build.js 18.0 --replaceBuild
node ./scripts/jest/jest-cli.js --build --project devtools --release-channel=experimental --reactVersion 18.0
```

Unrelated to this PR. There was some issue with jest caching when I
locally ran that command. it didn't seem to include the @reactVersion
transform, but if I manually modified `scripts/jest/preprocessor.js` or
ran ` yarn test --clearCache`, the jest test runs correctly.
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@tyao1
tyao1 authored Nov 28, 2022
1 parent 2655c93 commit 8a23def
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Showing 8 changed files with 532 additions and 444 deletions.
474 changes: 220 additions & 254 deletions packages/react-devtools-shared/src/__tests__/TimelineProfiler-test.js
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176 changes: 86 additions & 90 deletions packages/react-devtools-shared/src/__tests__/preprocessData-test.js
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115 changes: 115 additions & 0 deletions packages/react-dom/src/__tests__/ReactDOMServerSelectiveHydration-test.internal.js
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,7 @@ let Suspense;
let act;

let IdleEventPriority;
let ContinuousEventPriority;

function dispatchMouseHoverEvent(to, from) {
if (!to) {
Expand Down Expand Up @@ -110,6 +111,18 @@ function TODO_scheduleIdleDOMSchedulerTask(fn) {
});
}

function TODO_scheduleContinuousSchedulerTask(fn) {
ReactDOM.unstable_runWithPriority(ContinuousEventPriority, () => {
const prevEvent = window.event;
window.event = {type: 'message'};
try {
fn();
} finally {
window.event = prevEvent;
}
});
}

describe('ReactDOMServerSelectiveHydration', () => {
beforeEach(() => {
jest.resetModuleRegistry();
Expand All @@ -125,6 +138,8 @@ describe('ReactDOMServerSelectiveHydration', () => {
Suspense = React.Suspense;

IdleEventPriority = require('react-reconciler/constants').IdleEventPriority;
ContinuousEventPriority = require('react-reconciler/constants')
.ContinuousEventPriority;
});

it('hydrates the target boundary synchronously during a click', async () => {
Expand Down Expand Up @@ -1770,4 +1785,104 @@ describe('ReactDOMServerSelectiveHydration', () => {

document.body.removeChild(container);
});

it('can force hydration in response to sync update', () => {
function Child({text}) {
Scheduler.unstable_yieldValue(`Child ${text}`);
return <span ref={ref => (spanRef = ref)}>{text}</span>;
}
function App({text}) {
Scheduler.unstable_yieldValue(`App ${text}`);
return (
<div>
<Suspense fallback={null}>
<Child text={text} />
</Suspense>
</div>
);
}

let spanRef;
const finalHTML = ReactDOMServer.renderToString(<App text="A" />);
expect(Scheduler).toHaveYielded(['App A', 'Child A']);
const container = document.createElement('div');
document.body.appendChild(container);
container.innerHTML = finalHTML;
const initialSpan = container.getElementsByTagName('span')[0];
const root = ReactDOMClient.hydrateRoot(container, <App text="A" />);
expect(Scheduler).toFlushUntilNextPaint(['App A']);

ReactDOM.flushSync(() => {
root.render(<App text="B" />);
});
expect(Scheduler).toHaveYielded(['App B', 'Child A', 'App B', 'Child B']);
expect(initialSpan).toBe(spanRef);
});

// @gate experimental || www
it('can force hydration in response to continuous update', () => {
function Child({text}) {
Scheduler.unstable_yieldValue(`Child ${text}`);
return <span ref={ref => (spanRef = ref)}>{text}</span>;
}
function App({text}) {
Scheduler.unstable_yieldValue(`App ${text}`);
return (
<div>
<Suspense fallback={null}>
<Child text={text} />
</Suspense>
</div>
);
}

let spanRef;
const finalHTML = ReactDOMServer.renderToString(<App text="A" />);
expect(Scheduler).toHaveYielded(['App A', 'Child A']);
const container = document.createElement('div');
document.body.appendChild(container);
container.innerHTML = finalHTML;
const initialSpan = container.getElementsByTagName('span')[0];
const root = ReactDOMClient.hydrateRoot(container, <App text="A" />);
expect(Scheduler).toFlushUntilNextPaint(['App A']);

TODO_scheduleContinuousSchedulerTask(() => {
root.render(<App text="B" />);
});
expect(Scheduler).toFlushAndYield(['App B', 'Child A', 'App B', 'Child B']);
expect(initialSpan).toBe(spanRef);
});

it('can force hydration in response to default update', () => {
function Child({text}) {
Scheduler.unstable_yieldValue(`Child ${text}`);
return <span ref={ref => (spanRef = ref)}>{text}</span>;
}
function App({text}) {
Scheduler.unstable_yieldValue(`App ${text}`);
return (
<div>
<Suspense fallback={null}>
<Child text={text} />
</Suspense>
</div>
);
}

let spanRef;
const finalHTML = ReactDOMServer.renderToString(<App text="A" />);
expect(Scheduler).toHaveYielded(['App A', 'Child A']);
const container = document.createElement('div');
document.body.appendChild(container);
container.innerHTML = finalHTML;
const initialSpan = container.getElementsByTagName('span')[0];
const root = ReactDOMClient.hydrateRoot(container, <App text="A" />);
expect(Scheduler).toFlushUntilNextPaint(['App A']);

ReactDOM.unstable_batchedUpdates(() => {
root.render(<App text="B" />);
});
expect(Scheduler).toFlushAndYield(['App B', 'Child A', 'App B', 'Child B']);
expect(initialSpan).toBe(spanRef);
});
});
82 changes: 45 additions & 37 deletions packages/react-reconciler/src/ReactFiberLane.new.js
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Original file line number Diff line number Diff line change
Expand Up @@ -36,39 +36,39 @@ export const TotalLanes = 31;
export const NoLanes: Lanes = /* */ 0b0000000000000000000000000000000;
export const NoLane: Lane = /* */ 0b0000000000000000000000000000000;

export const SyncLane: Lane = /* */ 0b0000000000000000000000000000001;

export const InputContinuousHydrationLane: Lane = /* */ 0b0000000000000000000000000000010;
export const InputContinuousLane: Lane = /* */ 0b0000000000000000000000000000100;

export const DefaultHydrationLane: Lane = /* */ 0b0000000000000000000000000001000;
export const DefaultLane: Lane = /* */ 0b0000000000000000000000000010000;

const TransitionHydrationLane: Lane = /* */ 0b0000000000000000000000000100000;
const TransitionLanes: Lanes = /* */ 0b0000000001111111111111111000000;
const TransitionLane1: Lane = /* */ 0b0000000000000000000000001000000;
const TransitionLane2: Lane = /* */ 0b0000000000000000000000010000000;
const TransitionLane3: Lane = /* */ 0b0000000000000000000000100000000;
const TransitionLane4: Lane = /* */ 0b0000000000000000000001000000000;
const TransitionLane5: Lane = /* */ 0b0000000000000000000010000000000;
const TransitionLane6: Lane = /* */ 0b0000000000000000000100000000000;
const TransitionLane7: Lane = /* */ 0b0000000000000000001000000000000;
const TransitionLane8: Lane = /* */ 0b0000000000000000010000000000000;
const TransitionLane9: Lane = /* */ 0b0000000000000000100000000000000;
const TransitionLane10: Lane = /* */ 0b0000000000000001000000000000000;
const TransitionLane11: Lane = /* */ 0b0000000000000010000000000000000;
const TransitionLane12: Lane = /* */ 0b0000000000000100000000000000000;
const TransitionLane13: Lane = /* */ 0b0000000000001000000000000000000;
const TransitionLane14: Lane = /* */ 0b0000000000010000000000000000000;
const TransitionLane15: Lane = /* */ 0b0000000000100000000000000000000;
const TransitionLane16: Lane = /* */ 0b0000000001000000000000000000000;

const RetryLanes: Lanes = /* */ 0b0000111110000000000000000000000;
const RetryLane1: Lane = /* */ 0b0000000010000000000000000000000;
const RetryLane2: Lane = /* */ 0b0000000100000000000000000000000;
const RetryLane3: Lane = /* */ 0b0000001000000000000000000000000;
const RetryLane4: Lane = /* */ 0b0000010000000000000000000000000;
const RetryLane5: Lane = /* */ 0b0000100000000000000000000000000;
export const SyncHydrationLane: Lane = /* */ 0b0000000000000000000000000000001;
export const SyncLane: Lane = /* */ 0b0000000000000000000000000000010;

export const InputContinuousHydrationLane: Lane = /* */ 0b0000000000000000000000000000100;
export const InputContinuousLane: Lane = /* */ 0b0000000000000000000000000001000;

export const DefaultHydrationLane: Lane = /* */ 0b0000000000000000000000000010000;
export const DefaultLane: Lane = /* */ 0b0000000000000000000000000100000;

const TransitionHydrationLane: Lane = /* */ 0b0000000000000000000000001000000;
const TransitionLanes: Lanes = /* */ 0b0000000011111111111111110000000;
const TransitionLane1: Lane = /* */ 0b0000000000000000000000010000000;
const TransitionLane2: Lane = /* */ 0b0000000000000000000000100000000;
const TransitionLane3: Lane = /* */ 0b0000000000000000000001000000000;
const TransitionLane4: Lane = /* */ 0b0000000000000000000010000000000;
const TransitionLane5: Lane = /* */ 0b0000000000000000000100000000000;
const TransitionLane6: Lane = /* */ 0b0000000000000000001000000000000;
const TransitionLane7: Lane = /* */ 0b0000000000000000010000000000000;
const TransitionLane8: Lane = /* */ 0b0000000000000000100000000000000;
const TransitionLane9: Lane = /* */ 0b0000000000000001000000000000000;
const TransitionLane10: Lane = /* */ 0b0000000000000010000000000000000;
const TransitionLane11: Lane = /* */ 0b0000000000000100000000000000000;
const TransitionLane12: Lane = /* */ 0b0000000000001000000000000000000;
const TransitionLane13: Lane = /* */ 0b0000000000010000000000000000000;
const TransitionLane14: Lane = /* */ 0b0000000000100000000000000000000;
const TransitionLane15: Lane = /* */ 0b0000000001000000000000000000000;
const TransitionLane16: Lane = /* */ 0b0000000010000000000000000000000;

const RetryLanes: Lanes = /* */ 0b0000111100000000000000000000000;
const RetryLane1: Lane = /* */ 0b0000000100000000000000000000000;
const RetryLane2: Lane = /* */ 0b0000001000000000000000000000000;
const RetryLane3: Lane = /* */ 0b0000010000000000000000000000000;
const RetryLane4: Lane = /* */ 0b0000100000000000000000000000000;

export const SomeRetryLane: Lane = RetryLane1;

Expand All @@ -85,6 +85,9 @@ export const OffscreenLane: Lane = /* */ 0b1000000000000000000
// It should be kept in sync with the Lanes values above.
export function getLabelForLane(lane: Lane): string | void {
if (enableSchedulingProfiler) {
if (lane & SyncHydrationLane) {
return 'SyncHydrationLane';
}
if (lane & SyncLane) {
return 'Sync';
}
Expand Down Expand Up @@ -131,6 +134,8 @@ let nextRetryLane: Lane = RetryLane1;

function getHighestPriorityLanes(lanes: Lanes | Lane): Lanes {
switch (getHighestPriorityLane(lanes)) {
case SyncHydrationLane:
return SyncHydrationLane;
case SyncLane:
return SyncLane;
case InputContinuousHydrationLane:
Expand Down Expand Up @@ -164,7 +169,6 @@ function getHighestPriorityLanes(lanes: Lanes | Lane): Lanes {
case RetryLane2:
case RetryLane3:
case RetryLane4:
case RetryLane5:
return lanes & RetryLanes;
case SelectiveHydrationLane:
return SelectiveHydrationLane;
Expand Down Expand Up @@ -327,6 +331,7 @@ export function getMostRecentEventTime(root: FiberRoot, lanes: Lanes): number {

function computeExpirationTime(lane: Lane, currentTime: number) {
switch (lane) {
case SyncHydrationLane:
case SyncLane:
case InputContinuousHydrationLane:
case InputContinuousLane:
Expand Down Expand Up @@ -364,7 +369,6 @@ function computeExpirationTime(lane: Lane, currentTime: number) {
case RetryLane2:
case RetryLane3:
case RetryLane4:
case RetryLane5:
// TODO: Retries should be allowed to expire if they are CPU bound for
// too long, but when I made this change it caused a spike in browser
// crashes. There must be some other underlying bug; not super urgent but
Expand Down Expand Up @@ -459,7 +463,7 @@ export function getLanesToRetrySynchronouslyOnError(
}

export function includesSyncLane(lanes: Lanes): boolean {
return (lanes & SyncLane) !== NoLanes;
return (lanes & (SyncLane | SyncHydrationLane)) !== NoLanes;
}

export function includesNonIdleWork(lanes: Lanes): boolean {
Expand All @@ -469,6 +473,8 @@ export function includesOnlyRetries(lanes: Lanes): boolean {
return (lanes & RetryLanes) === lanes;
}
export function includesOnlyNonUrgentLanes(lanes: Lanes): boolean {
// TODO: Should hydration lanes be included here? This function is only
// used in `updateDeferredValueImpl`.
const UrgentLanes = SyncLane | InputContinuousLane | DefaultLane;
return (lanes & UrgentLanes) === NoLanes;
}
Expand Down Expand Up @@ -749,6 +755,9 @@ export function getBumpedLaneForHydration(

let lane;
switch (renderLane) {
case SyncLane:
lane = SyncHydrationLane;
break;
case InputContinuousLane:
lane = InputContinuousHydrationLane;
break;
Expand All @@ -775,7 +784,6 @@ export function getBumpedLaneForHydration(
case RetryLane2:
case RetryLane3:
case RetryLane4:
case RetryLane5:
lane = TransitionHydrationLane;
break;
case IdleLane:
Expand Down
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