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Use testing builds for our own tests
Following up from facebook#17915 where we generated testing builds for `react-dom`, this PR uses those builds for our own tests. - fixes `ReactFeatureFlags.testing` to use all the default flags - changes `ReactFeatureFlags.readonly` to return `isTestEnvironment: true` (this might not strictly be needed) - with jest, mocks `react-dom` with the testing version, both for source and builds - uses `ReactDOM.act` in one of these tests to verify it actually works
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‎fixtures/dom/src/__tests__/nested-act-test.js‎

Lines changed: 1 addition & 4 deletions
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@@ -13,10 +13,7 @@ let TestRenderer;
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global.__DEV__ = process.env.NODE_ENV !== 'production';
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jest.mock('react-dom', () =>
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require.requireActual('react-dom/cjs/react-dom-testing.development.js')
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);
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// we'll replace the above with react/testing and react-dom/testing right before the next minor
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jest.mock('react-dom', () => require.requireActual('react-dom/testing.js'));
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expect.extend(require('../toWarnDev'));
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‎fixtures/dom/src/__tests__/wrong-act-test.js‎

Lines changed: 1 addition & 4 deletions
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@@ -18,10 +18,7 @@ let ARTTest;
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global.__DEV__ = process.env.NODE_ENV !== 'production';
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global.__EXPERIMENTAL__ = process.env.RELEASE_CHANNEL === 'experimental';
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jest.mock('react-dom', () =>
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require.requireActual('react-dom/cjs/react-dom-testing.development.js')
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);
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// we'll replace the above with react/testing and react-dom/testing right before the next minor
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jest.mock('react-dom', () => require.requireActual('react-dom/testing.js'));
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expect.extend(require('../toWarnDev'));
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‎packages/react-dom/package.json‎

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@@ -30,6 +30,7 @@
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"README.md",
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"build-info.json",
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"index.js",
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"testing.js",
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"profiling.js",
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"server.js",
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"server.browser.js",

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

Lines changed: 1 addition & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -13,7 +13,6 @@ let React;
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let ReactDOM;
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let Suspense;
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let ReactCache;
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let ReactTestUtils;
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let Scheduler;
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let TextResource;
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let act;
@@ -26,9 +25,8 @@ describe('ReactDOMSuspensePlaceholder', () => {
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React = require('react');
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ReactDOM = require('react-dom');
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ReactCache = require('react-cache');
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ReactTestUtils = require('react-dom/test-utils');
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Scheduler = require('scheduler');
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act = ReactTestUtils.act;
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act = ReactDOM.act;
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Suspense = React.Suspense;
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container = document.createElement('div');
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document.body.appendChild(container);

‎packages/shared/forks/ReactFeatureFlags.readonly.js‎

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Original file line numberDiff line numberDiff line change
@@ -9,4 +9,4 @@
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// It lets us determine whether we're running in Fire mode without making tests internal.
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const ReactFeatureFlags = require('../ReactFeatureFlags');
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// Forbid writes because this wouldn't work with bundle tests.
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module.exports = Object.freeze({...ReactFeatureFlags});
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module.exports = Object.freeze({...ReactFeatureFlags, isTestEnvironment: true});

‎packages/shared/forks/ReactFeatureFlags.testing.js‎

Lines changed: 40 additions & 40 deletions
Original file line numberDiff line numberDiff line change
@@ -7,51 +7,51 @@
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* @flow
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*/
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10-
import invariant from 'shared/invariant';
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// keep in sync with ReactFeatureFlags.js
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// only isTestEnvironment is different, and true
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import typeof * as FeatureFlagsType from 'shared/ReactFeatureFlags';
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import typeof * as PersistentFeatureFlagsType from './ReactFeatureFlags.persistent';
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export const debugRenderPhaseSideEffectsForStrictMode = false;
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export const enableUserTimingAPI = __DEV__;
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export const warnAboutDeprecatedLifecycles = true;
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export const replayFailedUnitOfWorkWithInvokeGuardedCallback = false;
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export const enableProfilerTimer = __PROFILE__;
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export const enableSchedulerTracing = __PROFILE__;
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export const enableSuspenseServerRenderer = false;
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export const enableSelectiveHydration = false;
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export const enableChunksAPI = false;
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export const disableJavaScriptURLs = false;
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export const disableInputAttributeSyncing = false;
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export const exposeConcurrentModeAPIs = __EXPERIMENTAL__;
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export const warnAboutShorthandPropertyCollision = false;
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export const enableSchedulerDebugging = false;
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export const enableDeprecatedFlareAPI = false;
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export const enableFundamentalAPI = false;
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export const enableScopeAPI = false;
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export const enableJSXTransformAPI = false;
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export const warnAboutUnmockedScheduler = false;
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export const flushSuspenseFallbacksInTests = true;
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export const enableSuspenseCallback = false;
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export const warnAboutDefaultPropsOnFunctionComponents = false;
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export const warnAboutStringRefs = false;
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export const disableLegacyContext = false;
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export const disableSchedulerTimeoutBasedOnReactExpirationTime = false;
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export const enableTrainModelFix = true;
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export const enableTrustedTypesIntegration = false;
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export const enableNativeTargetAsInstance = false;
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export const disableCreateFactory = false;
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export const disableTextareaChildren = false;
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export const disableUnstableRenderSubtreeIntoContainer = false;
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export const warnUnstableRenderSubtreeIntoContainer = false;
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export const disableUnstableCreatePortal = false;
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export const deferPassiveEffectCleanupDuringUnmount = false;
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export const isTestEnvironment = true;
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export {
17+
enableUserTimingAPI,
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debugRenderPhaseSideEffectsForStrictMode,
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replayFailedUnitOfWorkWithInvokeGuardedCallback,
20+
warnAboutDeprecatedLifecycles,
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enableProfilerTimer,
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enableSchedulerTracing,
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enableSuspenseServerRenderer,
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enableSelectiveHydration,
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enableChunksAPI,
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enableSchedulerDebugging,
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disableJavaScriptURLs,
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exposeConcurrentModeAPIs,
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warnAboutShorthandPropertyCollision,
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enableDeprecatedFlareAPI,
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enableFundamentalAPI,
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enableScopeAPI,
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enableJSXTransformAPI,
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warnAboutUnmockedScheduler,
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flushSuspenseFallbacksInTests,
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enableSuspenseCallback,
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warnAboutDefaultPropsOnFunctionComponents,
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disableSchedulerTimeoutBasedOnReactExpirationTime,
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enableTrainModelFix,
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enableTrustedTypesIntegration,
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enableNativeTargetAsInstance,
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deferPassiveEffectCleanupDuringUnmount,
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disableInputAttributeSyncing,
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warnAboutStringRefs,
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disableLegacyContext,
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disableCreateFactory,
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disableTextareaChildren,
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disableUnstableRenderSubtreeIntoContainer,
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warnUnstableRenderSubtreeIntoContainer,
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disableUnstableCreatePortal,
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addUserTimingListener,
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} from 'shared/ReactFeatureFlags';
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// Only used in www builds.
52-
export function addUserTimingListener() {
53-
invariant(false, 'Not implemented.');
54-
}
54+
export const isTestEnvironment = true;
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// Flow magic to verify the exports of this file match the original version.
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// eslint-disable-next-line no-unused-vars

‎packages/shared/forks/ReactFeatureFlags.testing.www.js‎

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@@ -0,0 +1,64 @@
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/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @flow
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*/
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10+
// keep in sync with forks/ReactFeatureFlags.testing.js
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// only isTestEnvironment is different, and true
12+
13+
import typeof * as FeatureFlagsType from 'shared/ReactFeatureFlags';
14+
import typeof * as FeatureFlagsShimType from './ReactFeatureFlags.www';
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16+
// Re-export dynamic flags from the www version.
17+
export const {
18+
debugRenderPhaseSideEffectsForStrictMode,
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disableInputAttributeSyncing,
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enableTrustedTypesIntegration,
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deferPassiveEffectCleanupDuringUnmount,
22+
} = require('ReactFeatureFlags');
23+
24+
export {
25+
enableUserTimingAPI,
26+
replayFailedUnitOfWorkWithInvokeGuardedCallback,
27+
warnAboutDeprecatedLifecycles,
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enableProfilerTimer,
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enableSchedulerTracing,
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enableSuspenseServerRenderer,
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enableSelectiveHydration,
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enableChunksAPI,
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enableSchedulerDebugging,
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disableJavaScriptURLs,
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exposeConcurrentModeAPIs,
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warnAboutShorthandPropertyCollision,
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enableDeprecatedFlareAPI,
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enableFundamentalAPI,
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enableScopeAPI,
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enableJSXTransformAPI,
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warnAboutUnmockedScheduler,
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flushSuspenseFallbacksInTests,
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enableSuspenseCallback,
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warnAboutDefaultPropsOnFunctionComponents,
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disableSchedulerTimeoutBasedOnReactExpirationTime,
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enableTrainModelFix,
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enableNativeTargetAsInstance,
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warnAboutStringRefs,
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disableLegacyContext,
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disableCreateFactory,
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disableTextareaChildren,
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disableUnstableRenderSubtreeIntoContainer,
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warnUnstableRenderSubtreeIntoContainer,
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disableUnstableCreatePortal,
55+
addUserTimingListener,
56+
} from 'shared/ReactFeatureFlags.www';
57+
58+
export const isTestEnvironment = true;
59+
60+
// Flow magic to verify the exports of this file match the original version.
61+
// eslint-disable-next-line no-unused-vars
62+
type Check<_X, Y: _X, X: Y = _X> = null;
63+
// eslint-disable-next-line no-unused-expressions
64+
(null: Check<FeatureFlagsShimType, FeatureFlagsType>);

‎scripts/jest/config.base.js‎

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@@ -4,6 +4,9 @@ module.exports = {
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haste: {
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hasteImplModulePath: require.resolve('./noHaste.js'),
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},
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moduleNameMapper: {
8+
'^shared/ReactFeatureFlags': `<rootDir>/packages/shared/forks/ReactFeatureFlags.testing`,
9+
},
710
modulePathIgnorePatterns: [
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'<rootDir>/scripts/rollup/shims/',
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'<rootDir>/scripts/bench/',

‎scripts/jest/setupHostConfigs.js‎

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@@ -177,6 +177,8 @@ inlinedHostConfigs.forEach(rendererInfo => {
177177
}
178178
});
179179

180+
jest.mock('react-dom', () => require.requireActual('react-dom/testing'));
181+
180182
// Make it possible to import this module inside
181183
// the React package itself.
182184
jest.mock('shared/ReactSharedInternals', () =>

‎scripts/jest/setupTests.build.js‎

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@@ -1,5 +1,7 @@
11
'use strict';
22

3+
jest.mock('react-dom', () => require.requireActual(`react-dom/testing`));
4+
35
jest.mock('scheduler', () => require.requireActual('scheduler/unstable_mock'));
46
jest.mock('scheduler/src/SchedulerHostConfig', () =>
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require.requireActual('scheduler/src/forks/SchedulerHostConfig.mock.js')

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