react/packages/shared/ReactFeatureFlags.js
Sunil Pai d278a3ff8b
act() - s / flushPassiveEffects / Scheduler.unstable_flushWithoutYielding (#15591)
* s/flushPassiveEffects/unstable_flushWithoutYielding

a first crack at flushing the scheduler manually from inside act(). uses unstable_flushWithoutYielding(). The tests that changed, mostly replaced toFlushAndYield(...) with toHaveYielded(). For some tests that tested the state of the tree before flushing effects (but still after updates), I replaced act() with bacthedUpdates().

* ugh lint

* pass build, flushPassiveEffects returns nothing now

* pass test-fire

* flush all work (not just effects), add a compatibility mode

of note, unstable_flushWithoutYielding now returns a boolean much like flushPassiveEffects

* umd build for scheduler/unstable_mock, pass the fixture with it

* add a comment to Shcduler.umd.js for why we're exporting unstable_flushWithoutYielding

* run testsutilsact tests in both sync/concurrent modes

* augh lint

* use a feature flag for the missing mock scheduler warning

I also tried writing a test for it, but couldn't get the scheduler to unmock. included the failing test.

* Update ReactTestUtilsAct-test.js

- pass the mock scheduler warning test,
- rewrite some tests to use Scheduler.yieldValue
- structure concurrent/legacy suites neatly

* pass failing tests in batchedmode-test

* fix pretty/lint/import errors

* pass test-build

* nit: pull .create(null) out of the act() call
2019-05-16 17:12:36 +01:00

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2.9 KiB
JavaScript

/**
* 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.
*
* @flow strict
*/
export const enableUserTimingAPI = __DEV__;
// Helps identify side effects in begin-phase lifecycle hooks and setState reducers:
export const debugRenderPhaseSideEffects = false;
// In some cases, StrictMode should also double-render lifecycles.
// This can be confusing for tests though,
// And it can be bad for performance in production.
// This feature flag can be used to control the behavior:
export const debugRenderPhaseSideEffectsForStrictMode = __DEV__;
// To preserve the "Pause on caught exceptions" behavior of the debugger, we
// replay the begin phase of a failed component inside invokeGuardedCallback.
export const replayFailedUnitOfWorkWithInvokeGuardedCallback = __DEV__;
// Warn about deprecated, async-unsafe lifecycles; relates to RFC #6:
export const warnAboutDeprecatedLifecycles = true;
// Gather advanced timing metrics for Profiler subtrees.
export const enableProfilerTimer = __PROFILE__;
// Trace which interactions trigger each commit.
export const enableSchedulerTracing = __PROFILE__;
// Only used in www builds.
export const enableSuspenseServerRenderer = false; // TODO: __DEV__? Here it might just be false.
// Only used in www builds.
export const enableSchedulerDebugging = false;
// Only used in www builds.
export function addUserTimingListener() {
throw new Error('Not implemented.');
}
// Disable javascript: URL strings in href for XSS protection.
export const disableJavaScriptURLs = false;
// Disables yielding during render in Concurrent Mode. Used for debugging only.
export const disableYielding = false;
// React Fire: prevent the value and checked attributes from syncing
// with their related DOM properties
export const disableInputAttributeSyncing = false;
// These APIs will no longer be "unstable" in the upcoming 16.7 release,
// Control this behavior with a flag to support 16.6 minor releases in the meanwhile.
export const enableStableConcurrentModeAPIs = false;
export const warnAboutShorthandPropertyCollision = false;
// See https://github.com/react-native-community/discussions-and-proposals/issues/72 for more information
// This is a flag so we can fix warnings in RN core before turning it on
export const warnAboutDeprecatedSetNativeProps = false;
// Experimental React Events support. Only used in www builds for now.
export const enableEventAPI = false;
// New API for JSX transforms to target - https://github.com/reactjs/rfcs/pull/107
export const enableJSXTransformAPI = false;
// We will enforce mocking scheduler with scheduler/unstable_mock at some point. (v17?)
// Till then, we warn about the missing mock, but still fallback to a sync mode compatible version
export const warnAboutMissingMockScheduler = false;
// Temporary flag to revert the fix in #15650
export const revertPassiveEffectsChange = false;