feat(jest-cli, jest-config, @jest/core, jest-haste-map, @jest/reporters, jest-runner, jest-runtime, @jest/types): add workerThreads configuration option
#13939
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Some additional context. In one project I am patching Jest to use worker threads. This was a work around which helps to avoid this work around in child process implementation: What you see above is how The environmental variables are different running single test or running a bunch of them in parallel. What just passed as a single test will fail in parallel run. Not good. The worker threads do not suffer from this problem, because in this case I understand that this is rather exotic problem. Just explaining how I came to the idea about |
mrazauskas
commented
Feb 20, 2023
| @@ -2375,3 +2375,7 @@ This option allows comments in `package.json`. Include the comment text as the v | |||
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| } | |||
| ``` | |||
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| ### `workerThreads` | |||
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Alternatively could be named: threads, useThreads, useWorkerThreads. Or it could implemented similar to coverageProvider or testRunner, e.g. parallelization: 'childProcesses' | 'workerThreads'.
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I think this is fine. there won't ever be any other alternatives
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FWIW, #7637 attempts to flip the default leading to some issues (I think with serialization of messages as threads use |
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Sure. I will add it to Also I am thinking to include a note that this is experimental feature. Because of These maybe fixed by implementing what you suggested in #11467 (comment). Out of scope for this PR, but that seems like next logical step. |
Co-authored-by: Simen Bekkhus <sbekkhus91@gmail.com>
SimenB
approved these changes
Feb 22, 2023
Vylpes
pushed a commit
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Mar 27, 2023
This PR contains the following updates:
| Package | Type | Update | Change |
|---|---|---|---|
| [jest](https://jestjs.io/) ([source](https://github.com/facebook/jest)) | dependencies | major | [`^27.4.5` -> `^29.0.0`](https://renovatebot.com/diffs/npm/jest/27.4.5/29.5.0) |
| [@types/jest](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/jest) ([source](https://github.com/DefinitelyTyped/DefinitelyTyped)) | dependencies | major | [`^27.0.3` -> `^29.0.0`](https://renovatebot.com/diffs/npm/@types%2fjest/27.0.3/29.5.0) |
---
### Release Notes
<details>
<summary>facebook/jest</summary>
### [`v29.5.0`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2950)
[Compare Source](https://github.com/facebook/jest/compare/v29.4.3...v29.5.0)
##### Features
- `[jest-changed-files]` Support Sapling ([#​13941](https://github.com/facebook/jest/pull/13941))
- `[jest-circus, @​jest/cli, jest-config]` Add feature to randomize order of tests via CLI flag or through the config file([#​12922](https://github.com/facebook/jest/pull/12922))
- `[jest-cli, jest-config, @​jest/core, jest-haste-map, @​jest/reporters, jest-runner, jest-runtime, @​jest/types]` Add `workerThreads` configuration option to allow using [worker threads](https://nodejs.org/dist/latest/docs/api/worker_threads.html) for parallelization ([#​13939](https://github.com/facebook/jest/pull/13939))
- `[jest-cli]` Export `yargsOptions` ([#​13970](https://github.com/facebook/jest/pull/13970))
- `[jest-config]` Add `openHandlesTimeout` option to configure possible open handles warning. ([#​13875](https://github.com/facebook/jest/pull/13875))
- `[@jest/create-cache-key-function]` Allow passing `length` argument to `createCacheKey()` function and set its default value to `16` on Windows ([#​13827](https://github.com/facebook/jest/pull/13827))
- `[jest-message-util]` Add support for [AggregateError](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/AggregateError) ([#​13946](https://github.com/facebook/jest/pull/13946) & [#​13947](https://github.com/facebook/jest/pull/13947))
- `[jest-message-util]` Add support for [Error causes](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error/cause) in `test` and `it` ([#​13935](https://github.com/facebook/jest/pull/13935) & [#​13966](https://github.com/facebook/jest/pull/13966))
- `[jest-reporters]` Add `summaryThreshold` option to summary reporter to allow overriding the internal threshold that is used to print the summary of all failed tests when the number of test suites surpasses it ([#​13895](https://github.com/facebook/jest/pull/13895))
- `[jest-runtime]` Expose `@sinonjs/fake-timers` async APIs functions `advanceTimersByTimeAsync(msToRun)` (`tickAsync(msToRun)`), `advanceTimersToNextTimerAsync(steps)` (`nextAsync`), `runAllTimersAsync` (`runAllAsync`), and `runOnlyPendingTimersAsync` (`runToLastAsync`) ([#​13981](https://github.com/facebook/jest/pull/13981))
- `[jest-runtime, @​jest/transform]` Allow V8 coverage provider to collect coverage from files which were not loaded explicitly ([#​13974](https://github.com/facebook/jest/pull/13974))
- `[jest-snapshot]` Add support to `cts` and `mts` TypeScript files to inline snapshots ([#​13975](https://github.com/facebook/jest/pull/13975))
- `[jest-worker]` Add `start` method to worker farms ([#​13937](https://github.com/facebook/jest/pull/13937))
- `[jest-worker]` Support passing a URL as path to worker ([#​13982](https://github.com/facebook/jest/pull/13982))
##### Fixes
- `[babel-plugin-jest-hoist]` Fix unwanted hoisting of nested `jest` usages ([#​13952](https://github.com/facebook/jest/pull/13952))
- `[jest-circus]` Send test case results for `todo` tests ([#​13915](https://github.com/facebook/jest/pull/13915))
- `[jest-circus]` Update message printed on test timeout ([#​13830](https://github.com/facebook/jest/pull/13830))
- `[jest-circus]` Avoid creating the word "testfalse" when `takesDoneCallback` is `false` in the message printed on test timeout AND updated timeouts test ([#​13954](https://github.com/facebook/jest/pull/13954))
- `[jest-environment-jsdom]` Stop setting `document` to `null` on teardown ([#​13972](https://github.com/facebook/jest/pull/13972))
- `[@jest/expect-utils]` Update `toStrictEqual()` to be able to check `jest.fn().mock.calls` ([#​13960](https://github.com/facebook/jest/pull/13960))
- `[@jest/test-result]` Allow `TestResultsProcessor` type to return a Promise ([#​13950](https://github.com/facebook/jest/pull/13950))
##### Chore & Maintenance
- `[jest-snapshot]` Remove dependency on `jest-haste-map` ([#​13977](https://github.com/facebook/jest/pull/13977))
### [`v29.4.3`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2943)
[Compare Source](https://github.com/facebook/jest/compare/v29.4.2...v29.4.3)
##### Features
- `[expect]` Update `toThrow()` to be able to use error `cause`s ([#​13606](https://github.com/facebook/jest/pull/13606))
- `[jest-core]` allow to use `workerIdleMemoryLimit` with only 1 worker or `runInBand` option ([#​13846](https://github.com/facebook/jest/pull/13846))
- `[jest-message-util]` Add support for [error `cause`s](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error/cause) ([#​13868](https://github.com/facebook/jest/pull/13868) & [#​13912](https://github.com/facebook/jest/pull/13912))
- `[jest-runtime]` Revert `import assertions` for JSON modules as it's been relegated to Stage 2 ([#​13911](https://github.com/facebook/jest/pull/13911))
##### Fixes
- `[@jest/expect-utils]` `subsetEquality` should consider also an object's inherited string keys ([#​13824](https://github.com/facebook/jest/pull/13824))
- `[jest-mock]` Clear mock state when `jest.restoreAllMocks()` is called ([#​13867](https://github.com/facebook/jest/pull/13867))
- `[jest-mock]` Prevent `mockImplementationOnce` and `mockReturnValueOnce` bleeding into `withImplementation` ([#​13888](https://github.com/facebook/jest/pull/13888))
- `[jest-mock]` Do not restore mocks when `jest.resetAllMocks()` is called ([#​13866](https://github.com/facebook/jest/pull/13866))
### [`v29.4.2`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2942)
[Compare Source](https://github.com/facebook/jest/compare/v29.4.1...v29.4.2)
##### Features
- `[@jest/core]` Instrument significant lifecycle events with [`performance.mark()`](https://nodejs.org/docs/latest-v16.x/api/perf_hooks.html#performancemarkname-options) ([#​13859](https://github.com/facebook/jest/pull/13859))
##### Fixes
- `[expect, @​jest/expect]` Provide type of `actual` as a generic argument to `Matchers` to allow better-typed extensions ([#​13848](https://github.com/facebook/jest/pull/13848))
- `[jest-circus]` Added explicit mention of test failing because `done()` is not being called in error message ([#​13847](https://github.com/facebook/jest/pull/13847))
- `[jest-runtime]` Handle CJS re-exports of node core modules from ESM ([#​13856](https://github.com/facebook/jest/pull/13856))
- `[jest-transform]` Downgrade `write-file-atomic` to v4 ([#​13853](https://github.com/facebook/jest/pull/13853))
- `[jest-worker]` Ignore IPC messages not intended for Jest ([#​13543](https://github.com/facebook/jest/pull/13543))
##### Chore & Maintenance
- `[*]` make sure to exclude `.eslintcache` from published module ([#​13832](https://github.com/facebook/jest/pull/13832))
- `[docs]` Cleanup incorrect links in CHANGELOG.md ([#​13857](https://github.com/facebook/jest/pull/13857))
### [`v29.4.1`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2941)
[Compare Source](https://github.com/facebook/jest/compare/v29.4.0...v29.4.1)
##### Features
- `[expect, jest-circus, @​jest/types]` Implement `numPassingAsserts` of testResults to track the number of passing asserts in a test ([#​13795](https://github.com/facebook/jest/pull/13795))
- `[jest-core]` Add newlines to JSON output ([#​13817](https://github.com/facebook/jest/pull/13817))
- `[@jest/reporters]` Automatic log folding in GitHub Actions Reporter ([#​13626](https://github.com/facebook/jest/pull/13626))
##### Fixes
- `[@jest/expect-utils]` `toMatchObject` diffs should include `Symbol` properties ([#​13810](https://github.com/facebook/jest/pull/13810))
- `[jest-runtime]` Handle missing `replaceProperty` ([#​13823](https://github.com/facebook/jest/pull/13823))
- `[@jest/types]` Add partial support for `done` callbacks in typings of `each` ([#​13756](https://github.com/facebook/jest/pull/13756))
### [`v29.4.0`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2940)
[Compare Source](https://github.com/facebook/jest/compare/v29.3.1...v29.4.0)
##### Features
- `[expect, @​jest/expect-utils]` Support custom equality testers ([#​13654](https://github.com/facebook/jest/pull/13654))
- `[jest-config, jest-worker]` Use `os.availableParallelism` if available to calculate number of workers to spawn ([#​13738](https://github.com/facebook/jest/pull/13738))
- `[@jest/globals, jest-mock]` Add `jest.replaceProperty()` that replaces property value ([#​13496](https://github.com/facebook/jest/pull/13496))
- `[jest-haste-map]` ignore Sapling vcs directories (`.sl/`) ([#​13674](https://github.com/facebook/jest/pull/13674))
- `[jest-resolve]` Support subpath imports ([#​13705](https://github.com/facebook/jest/pull/13705), [#​13723](https://github.com/facebook/jest/pull/13723), [#​13777](https://github.com/facebook/jest/pull/13777))
- `[jest-runtime]` Add `jest.isolateModulesAsync` for scoped module initialization of asynchronous functions ([#​13680](https://github.com/facebook/jest/pull/13680))
- `[jest-runtime]` Add `jest.isEnvironmentTornDown` function ([#​13741](https://github.com/facebook/jest/pull/13741))
- `[jest-test-result]` Added `skipped` and `focused` status to `FormattedTestResult` ([#​13700](https://github.com/facebook/jest/pull/13700))
- `[jest-transform]` Support for asynchronous `createTransformer` ([#​13762](https://github.com/facebook/jest/pull/13762))
##### Fixes
- `[jest-environment-node]` Fix non-configurable globals ([#​13687](https://github.com/facebook/jest/pull/13687))
- `[@jest/expect-utils]` `toMatchObject` should handle `Symbol` properties ([#​13639](https://github.com/facebook/jest/pull/13639))
- `[jest-mock]` Fix `mockReset` and `resetAllMocks` `undefined` return value([#​13692](https://github.com/facebook/jest/pull/13692))
- `[jest-resolve]` Add global paths to `require.resolve.paths` ([#​13633](https://github.com/facebook/jest/pull/13633))
- `[jest-resolve]` Correct node core module detection when using `node:` specifiers ([#​13806](https://github.com/facebook/jest/pull/13806))
- `[jest-runtime]` Support WASM files that import JS resources ([#​13608](https://github.com/facebook/jest/pull/13608))
- `[jest-runtime]` Use the `scriptTransformer` cache in `jest-runner` ([#​13735](https://github.com/facebook/jest/pull/13735))
- `[jest-runtime]` Enforce import assertions when importing JSON in ESM ([#​12755](https://github.com/facebook/jest/pull/12755) & [#​13805](https://github.com/facebook/jest/pull/13805))
- `[jest-snapshot]` Make sure to import `babel` outside of the sandbox ([#​13694](https://github.com/facebook/jest/pull/13694))
- `[jest-transform]` Ensure the correct configuration is passed to preprocessors specified multiple times in the `transform` option ([#​13770](https://github.com/facebook/jest/pull/13770))
##### Chore & Maintenance
- `[@jest/fake-timers]` Update `@sinonjs/fake-timers` ([#​13612](https://github.com/facebook/jest/pull/13612))
- `[docs]` Improve custom puppeteer example to prevent worker warnings ([#​13619](https://github.com/facebook/jest/pull/13619))
### [`v29.3.1`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2931)
[Compare Source](https://github.com/facebook/jest/compare/v29.3.0...v29.3.1)
##### Fixes
- `[jest-config]` Do not warn about `preset` in `ProjectConfig` ([#​13583](https://github.com/facebook/jest/pull/13583))
##### Performance
- `[jest-transform]` Defer creation of cache directory ([#​13420](https://github.com/facebook/jest/pull/13420))
### [`v29.3.0`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2930)
[Compare Source](https://github.com/facebook/jest/compare/v29.2.2...v29.3.0)
##### Features
- `[jest-runtime]` Support WebAssembly (Wasm) imports in ESM modules ([#​13505](https://github.com/facebook/jest/pull/13505))
##### Fixes
- `[jest-config]` Add config validation for `projects` option ([#​13565](https://github.com/facebook/jest/pull/13565))
- `[jest-mock]` Treat cjs modules as objects so they can be mocked ([#​13513](https://github.com/facebook/jest/pull/13513))
- `[jest-worker]` Throw an error instead of hanging when jest workers terminate unexpectedly ([#​13566](https://github.com/facebook/jest/pull/13566))
##### Chore & Maintenance
- `[@jest/transform]` Update `convert-source-map` ([#​13509](https://github.com/facebook/jest/pull/13509))
- `[docs]` Mention `toStrictEqual` in UsingMatchers docs. ([#​13560](https://github.com/facebook/jest/pull/13560))
### [`v29.2.2`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2922)
[Compare Source](https://github.com/facebook/jest/compare/v29.2.1...v29.2.2)
##### Fixes
- `[@jest/test-sequencer]` Make sure sharding does not produce empty groups ([#​13476](https://github.com/facebook/jest/pull/13476))
- `[jest-circus]` Test marked as `todo` are shown as todo when inside a focussed describe ([#​13504](https://github.com/facebook/jest/pull/13504))
- `[jest-mock]` Ensure mock resolved and rejected values are promises from correct realm ([#​13503](https://github.com/facebook/jest/pull/13503))
- `[jest-snapshot]` Don't highlight passing asymmetric property matchers in snapshot diff ([#​13480](https://github.com/facebook/jest/issues/13480))
##### Chore & Maintenance
- `[docs]` Update link to Jest 28 upgrade guide in error message ([#​13483](https://github.com/facebook/jest/pull/13483))
- `[jest-runner, jest-watcher]` Update `emittery` ([#​13490](https://github.com/facebook/jest/pull/13490))
### [`v29.2.1`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2921)
[Compare Source](https://github.com/facebook/jest/compare/v29.2.0...v29.2.1)
##### Features
- `[@jest/globals, jest-mock]` Add `jest.Spied*` utility types ([#​13440](https://github.com/facebook/jest/pull/13440))
##### Fixes
- `[jest-environment-node]` make `globalThis.performance` writable for Node 19 and fake timers ([#​13467](https://github.com/facebook/jest/pull/13467))
- `[jest-mock]` Revert [#​13398](https://github.com/facebook/jest/pull/13398) to restore mocking of setters ([#​13472](https://github.com/facebook/jest/pull/13472))
##### Performance
- `[*]` Use sha1 instead of sha256 for hashing ([#​13421](https://github.com/facebook/jest/pull/13421))
### [`v29.2.0`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2920)
[Compare Source](https://github.com/facebook/jest/compare/v29.1.2...v29.2.0)
##### Features
- `[@jest/cli, jest-config]` A seed for the test run will be randomly generated, or set by a CLI option ([#​13400](https://github.com/facebook/jest/pull/13400))
- `[@jest/cli, jest-config]` `--show-seed` will display the seed value in the report, and can be set via a CLI flag or through the config file ([#​13400](https://github.com/facebook/jest/pull/13400))
- `[jest-config]` Add `readInitialConfig` utility function ([#​13356](https://github.com/facebook/jest/pull/13356))
- `[jest-core]` Allow `testResultsProcessor` to be async ([#​13343](https://github.com/facebook/jest/pull/13343))
- `[@jest/environment, jest-environment-node, jest-environment-jsdom, jest-runtime]` Add `getSeed()` to the `jest` object ([#​13400](https://github.com/facebook/jest/pull/13400))
- `[expect, @​jest/expect-utils]` Allow `isA` utility to take a type argument ([#​13355](https://github.com/facebook/jest/pull/13355))
- `[expect]` Expose `AsyncExpectationResult` and `SyncExpectationResult` types ([#​13411](https://github.com/facebook/jest/pull/13411))
##### Fixes
- `[babel-plugin-jest-hoist]` Ignore `TSTypeQuery` when checking for hoisted references ([#​13367](https://github.com/facebook/jest/pull/13367))
- `[jest-core]` Fix `detectOpenHandles` false positives for some special objects such as `TLSWRAP` ([#​13414](https://github.com/facebook/jest/pull/13414))
- `[jest-mock]` Fix mocking of getters and setters on classes ([#​13398](https://github.com/facebook/jest/pull/13398))
- `[jest-reporters]` Revert: Transform file paths into hyperlinks ([#​13399](https://github.com/facebook/jest/pull/13399))
- `[@jest/types]` Infer type of `each` table correctly when the table is a tuple or array ([#​13381](https://github.com/facebook/jest/pull/13381))
- `[@jest/types]` Rework typings to allow the `*ReturnedWith` matchers to be called with no argument ([#​13385](https://github.com/facebook/jest/pull/13385))
##### Chore & Maintenance
- `[*]` Update `@babel/*` deps, resulting in slightly different stack traces for `each` ([#​13422](https://github.com/facebook/jest/pull/13422))
##### Performance
- `[jest-runner]` Do not instrument v8 coverage data if coverage should not be collected ([#​13282](https://github.com/facebook/jest/pull/13282))
### [`v29.1.2`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2912)
[Compare Source](https://github.com/facebook/jest/compare/v29.1.1...v29.1.2)
##### Fixes
- `[expect, @​jest/expect]` Revert buggy inference of argument types for `*CalledWith` and `*ReturnedWith` matchers introduced in 29.1.0 ([#​13339](https://github.com/facebook/jest/pull/13339))
- `[jest-worker]` Add missing dependency on `jest-util` ([#​13341](https://github.com/facebook/jest/pull/13341))
### [`v29.1.1`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2911)
[Compare Source](https://github.com/facebook/jest/compare/v29.1.0...v29.1.1)
##### Fixes
- `[jest-mock]` Revert [#​13145](https://github.com/facebook/jest/pull/13145) which broke mocking of transpiled ES modules
### [`v29.1.0`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2910)
[Compare Source](https://github.com/facebook/jest/compare/v29.0.3...v29.1.0)
##### Features
- `[expect, @​jest/expect]` Support type inference for function parameters in `CalledWith` assertions ([#​13268](https://github.com/facebook/jest/pull/13268))
- `[expect, @​jest/expect]` Infer type of `*ReturnedWith` matchers argument ([#​13278](https://github.com/facebook/jest/pull/13278))
- `[@jest/environment, jest-runtime]` Allow `jest.requireActual` and `jest.requireMock` to take a type argument ([#​13253](https://github.com/facebook/jest/pull/13253))
- `[@jest/environment]` Allow `jest.mock` and `jest.doMock` to take a type argument ([#​13254](https://github.com/facebook/jest/pull/13254))
- `[@jest/fake-timers]` Add `jest.now()` to return the current fake clock time ([#​13244](https://github.com/facebook/jest/pull/13244), [#​13246](https://github.com/facebook/jest/pull/13246))
- `[@jest/mock]` Add `withImplementation` method for temporarily overriding a mock ([#​13281](https://github.com/facebook/jest/pull/13281))
- `[expect]` Export `toThrow*` matchers ([#​13328](https://github.com/facebook/jest/pull/13328))
##### Fixes
- `[jest-circus, jest-jasmine2]` Fix error messages for Node's `assert.throes` ([#​13322](https://github.com/facebook/jest/pull/13322))
- `[jest-haste-map]` Remove `__proto__` usage ([#​13256](https://github.com/facebook/jest/pull/13256))
- `[jest-mock]` Improve `spyOn` typings to handle optional properties ([#​13247](https://github.com/facebook/jest/pull/13247))
- `[jest-mock]` Fix mocking of getters and setters on classes ([#​13145](https://github.com/facebook/jest/pull/13145))
- `[jest-snapshot]` Throw useful error when an array is passed as property matchers ([#​13263](https://github.com/facebook/jest/pull/13263))
- `[jest-snapshot]` Prioritize parser used in the project ([#​13323](https://github.com/facebook/jest/pull/13323))
- `[jest-transform]` Attempt to work around issues with atomic writes on Windows ([#​11423](https://github.com/facebook/jest/pull/11423))
### [`v29.0.3`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2903)
[Compare Source](https://github.com/facebook/jest/compare/v29.0.2...v29.0.3)
##### Features
- `[@jest/environment, jest-runtime]` Allow passing a generic type argument to `jest.createMockFromModule<T>()` method ([#​13202](https://github.com/facebook/jest/pull/13202))
- `[expect]` Expose `ExpectationResult` type ([#​13240](https://github.com/facebook/jest/pull/13240))
- `[jest-snapshot]` Expose `Context` type ([#​13240](https://github.com/facebook/jest/pull/13240))
- `[@jest/globals]` Add `jest.Mock` type helper ([#​13235](https://github.com/facebook/jest/pull/13235))
##### Fixes
- `[jest-core]` Capture `execError` during `TestScheduler.scheduleTests` and dispatch to reporters ([#​13203](https://github.com/facebook/jest/pull/13203))
- `[jest-resolve]` Make sure to resolve module paths after looking at `exports` ([#​13242](https://github.com/facebook/jest/pull/13242))
- `[jest-resolve]` Improve error on module not found deep in the `require` stack ([#​8704](https://github.com/facebook/jest/pull/8704))
- `[jest-snapshot]` Fix typings of snapshot matchers ([#​13240](https://github.com/facebook/jest/pull/13240))
##### Chore & Maintenance
- `[*]` Fix inconsistent workspace prefixes ([#​13217](https://github.com/facebook/jest/pull/13217))
- `[jest-haste-map]` Expose a minimal public API to TypeScript ([#​13023](https://github.com/facebook/jest/pull/13023))
### [`v29.0.2`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2902)
[Compare Source](https://github.com/facebook/jest/compare/v29.0.1...v29.0.2)
##### Features
- `[jest-transform]` Expose `TransformFactory` type ([#​13184](https://github.com/facebook/jest/pull/13184))
##### Fixes
- `[babel-plugin-jest-hoist]` Support imported `jest` in mock factory ([#​13188](https://github.com/facebook/jest/pull/13188))
- `[jest-mock]` Align the behavior and return type of `generateFromMetadata` method ([#​13207](https://github.com/facebook/jest/pull/13207))
- `[jest-runtime]` Support `jest.resetModules()` with ESM ([#​13211](https://github.com/facebook/jest/pull/13211))
### [`v29.0.1`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2901)
[Compare Source](https://github.com/facebook/jest/compare/v29.0.0...v29.0.1)
##### Fixes
- `[jest-snapshot]` Pass `snapshotFormat` through when diffing snapshots ([#​13181](https://github.com/facebook/jest/pull/13181))
### [`v29.0.0`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2900)
[Compare Source](https://github.com/facebook/jest/compare/v28.1.3...v29.0.0)
##### Features
- `[expect]` \[**BREAKING**] Differentiate between `MatcherContext` `MatcherUtils` and `MatcherState` types ([#​13141](https://github.com/facebook/jest/pull/13141))
- `[jest-circus]` Add support for `test.failing.each` ([#​13142](https://github.com/facebook/jest/pull/13142))
- `[jest-config]` \[**BREAKING**] Make `snapshotFormat` default to `escapeString: false` and `printBasicPrototype: false` ([#​13036](https://github.com/facebook/jest/pull/13036))
- `[jest-config]` \[**BREAKING**] Remove undocumented `collectCoverageOnlyFrom` option ([#​13156](https://github.com/facebook/jest/pull/13156))
- `[jest-environment-jsdom]` \[**BREAKING**] Upgrade to `jsdom@20` ([#​13037](https://github.com/facebook/jest/pull/13037), [#​13058](https://github.com/facebook/jest/pull/13058))
- `[@jest/globals]` Add `jest.Mocked`, `jest.MockedClass`, `jest.MockedFunction` and `jest.MockedObject` utility types ([#​12727](https://github.com/facebook/jest/pull/12727))
- `[jest-mock]` \[**BREAKING**] Refactor `Mocked*` utility types. `MaybeMockedDeep` and `MaybeMocked` became `Mocked` and `MockedShallow` respectively; only deep mocked variants of `MockedClass`, `MockedFunction` and `MockedObject` are exported ([#​13123](https://github.com/facebook/jest/pull/13123), [#​13124](https://github.com/facebook/jest/pull/13124))
- `[jest-mock]` \[**BREAKING**] Change the default `jest.mocked` helper’s behavior to deep mocked ([#​13125](https://github.com/facebook/jest/pull/13125))
- `[jest-snapshot]` \[**BREAKING**] Let `babel` find config when updating inline snapshots ([#​13150](https://github.com/facebook/jest/pull/13150))
- `[@jest/test-result, @​jest/types]` \[**BREAKING**] Replace `Bytes` and `Milliseconds` types with `number` ([#​13155](https://github.com/facebook/jest/pull/13155))
- `[jest-worker]` Adds `workerIdleMemoryLimit` option which is used as a check for worker memory leaks >= Node 16.11.0 and recycles child workers as required ([#​13056](https://github.com/facebook/jest/pull/13056), [#​13105](https://github.com/facebook/jest/pull/13105), [#​13106](https://github.com/facebook/jest/pull/13106), [#​13107](https://github.com/facebook/jest/pull/13107))
- `[pretty-format]` \[**BREAKING**] Remove `ConvertAnsi` plugin in favour of `jest-serializer-ansi-escapes` ([#​13040](https://github.com/facebook/jest/pull/13040))
- `[pretty-format]` Allow to opt out from sorting object keys with `compareKeys: null` ([#​12443](https://github.com/facebook/jest/pull/12443))
##### Fixes
- `[jest-config]` Fix testing multiple projects with TypeScript config files ([#​13099](https://github.com/facebook/jest/pull/13099))
- `[@jest/expect-utils]` Fix deep equality of ImmutableJS Record ([#​13055](https://github.com/facebook/jest/pull/13055))
- `[jest-haste-map]` Increase the maximum possible file size that jest-haste-map can handle ([#​13094](https://github.com/facebook/jest/pull/13094))
- `[jest-runtime]` Properly support CJS re-exports from dual packages ([#​13170](https://github.com/facebook/jest/pull/13170))
- `[jest-snapshot]` Make `prettierPath` optional in `SnapshotState` ([#​13149](https://github.com/facebook/jest/pull/13149))
- `[jest-snapshot]` Fix parsing error from inline snapshot files with `JSX` ([#​12760](https://github.com/facebook/jest/pull/12760))
- `[jest-worker]` When a process runs out of memory worker exits correctly and doesn't spin indefinitely ([#​13054](https://github.com/facebook/jest/pull/13054))
##### Chore & Maintenance
- `[*]` \[**BREAKING**] Drop support for Node v12 and v17 ([#​13033](https://github.com/facebook/jest/pull/13033))
- `[docs]` Fix webpack name ([#​13049](https://github.com/facebook/jest/pull/13049))
- `[docs]` Explicit how to set `n` for `--bail` ([#​13128](https://github.com/facebook/jest/pull/13128))
- `[docs]` Update Enzyme URL ([#​13166](https://github.com/facebook/jest/pull/13166))
- `[jest-leak-detector]` Remove support for `weak-napi` ([#​13035](https://github.com/facebook/jest/pull/13035))
- `[jest-snapshot]` \[**BREAKING**] Require `rootDir` as argument to `SnapshotState` ([#​13150](https://github.com/facebook/jest/pull/13150))
### [`v28.1.3`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2813)
[Compare Source](https://github.com/facebook/jest/compare/v28.1.2...v28.1.3)
##### Features
- `[jest-leak-detector]` Use native `FinalizationRegistry` when it exists to get rid of external C dependency ([#​12973](https://github.com/facebook/jest/pull/12973))
##### Fixes
- `[jest-changed-files]` Fix a lock-up after repeated invocations ([#​12757](https://github.com/facebook/jest/issues/12757))
- `[@jest/expect-utils]` Fix deep equality of ImmutableJS OrderedSets ([#​12977](https://github.com/facebook/jest/pull/12977))
- `[jest-mock]` Add index signature support for `spyOn` types ([#​13013](https://github.com/facebook/jest/pull/13013), [#​13020](https://github.com/facebook/jest/pull/13020))
- `[jest-snapshot]` Fix indentation of awaited inline snapshots ([#​12986](https://github.com/facebook/jest/pull/12986))
##### Chore & Maintenance
- `[*]` Replace internal usage of `pretty-format/ConvertAnsi` with `jest-serializer-ansi-escapes` ([#​12935](https://github.com/facebook/jest/pull/12935), [#​13004](https://github.com/facebook/jest/pull/13004))
- `[docs]` Update spyOn docs ([#​13000](https://github.com/facebook/jest/pull/13000))
### [`v28.1.2`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2812)
[Compare Source](https://github.com/facebook/jest/compare/v28.1.1...v28.1.2)
##### Fixes
- `[jest-runtime]` Avoid star type import from `@jest/globals` ([#​12949](https://github.com/facebook/jest/pull/12949))
##### Chore & Maintenance
- `[docs]` Mention that jest-codemods now supports Sinon ([#​12898](https://github.com/facebook/jest/pull/12898))
### [`v28.1.1`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2811)
[Compare Source](https://github.com/facebook/jest/compare/v28.1.0...v28.1.1)
##### Features
- `[jest]` Expose `Config` type ([#​12848](https://github.com/facebook/jest/pull/12848))
- `[@jest/reporters]` Improve `GitHubActionsReporter`s annotation format ([#​12826](https://github.com/facebook/jest/pull/12826))
- `[@jest/types]` Infer argument types passed to `test` and `describe` callback functions from `each` tables ([#​12885](https://github.com/facebook/jest/pull/12885), [#​12905](https://github.com/facebook/jest/pull/12905))
##### Fixes
- `[@jest/expect-utils]` Fix deep equality of ImmutableJS OrderedMaps ([#​12899](https://github.com/facebook/jest/pull/12899))
- `[jest-docblock]` Handle multiline comments in parseWithComments ([#​12845](https://github.com/facebook/jest/pull/12845))
- `[jest-mock]` Improve `spyOn` error messages ([#​12901](https://github.com/facebook/jest/pull/12901))
- `[jest-runtime]` Correctly report V8 coverage with `resetModules: true` ([#​12912](https://github.com/facebook/jest/pull/12912))
- `[jest-worker]` Make `JestWorkerFarm` helper type to include methods of worker module that take more than one argument ([#​12839](https://github.com/facebook/jest/pull/12839))
##### Chore & Maintenance
- `[docs]` Updated docs to indicate that `jest-environment-jsdom` is a separate package [#​12828](https://github.com/facebook/jest/issues/12828)
- `[docs]` Document the comments used by coverage providers [#​12835](https://github.com/facebook/jest/issues/12835)
- `[docs]` Use `docusaurus-remark-plugin-tab-blocks` to format tabs with code examples ([#​12859](https://github.com/facebook/jest/pull/12859))
- `[jest-haste-map]` Bump `walker` version ([#​12324](https://github.com/facebook/jest/pull/12324))
### [`v28.1.0`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2810)
[Compare Source](https://github.com/facebook/jest/compare/v28.0.3...v28.1.0)
##### Features
- `[jest-circus]` Add `failing` test modifier that inverts the behavior of tests ([#​12610](https://github.com/facebook/jest/pull/12610))
- `[jest-environment-node, jest-environment-jsdom]` Allow specifying `customExportConditions` ([#​12774](https://github.com/facebook/jest/pull/12774))
##### Fixes
- `[expect]` Adjust typings of `lastCalledWith`, `nthCalledWith`, `toBeCalledWith` matchers to allow a case there a mock was called with no arguments ([#​12807](https://github.com/facebook/jest/pull/12807))
- `[@jest/expect-utils]` Fix deep equality of ImmutableJS Lists ([#​12763](https://github.com/facebook/jest/pull/12763))
- `[jest-core]` Do not collect `SIGNREQUEST` as open handles ([#​12789](https://github.com/facebook/jest/pull/12789))
##### Chore & Maintenance
- `[docs]` Specified documentation about `--filter` CLI docs ([#​12799](https://github.com/facebook/jest/pull/12799))
- `[@jest-reporters]` Move helper functions from `utils.ts` into separate files ([#​12782](https://github.com/facebook/jest/pull/12782))
- `[jest-resolve]` Replace `process.versions.pnp` type declaration with `@types/pnpapi` devDependency ([#​12783](https://github.com/facebook/jest/pull/12783))
### [`v28.0.3`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2803)
[Compare Source](https://github.com/facebook/jest/compare/v28.0.2...v28.0.3)
##### Fixes
- `[jest-config]` Normalize `reporters` option defined in presets ([#​12769](https://github.com/facebook/jest/pull/12769))
- `[@jest/reporters]` Fix trailing slash in matching `coverageThreshold` key ([#​12714](https://github.com/facebook/jest/pull/12714))
- `[jest-resolve]` Fix (experimental) ESM module mocking for re-exports ([#​12766](https://github.com/facebook/jest/pull/12766))
- `[@jest/transform]` Throw better error if an invalid return value if encountered ([#​12764](https://github.com/facebook/jest/pull/12764))
##### Chore & Maintenance
- `[docs]` Fix typo in `--shard` CLI docs ([#​12761](https://github.com/facebook/jest/pull/12761))
### [`v28.0.2`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2802)
[Compare Source](https://github.com/facebook/jest/compare/v28.0.1...v28.0.2)
##### Features
- `[jest-worker]` Add `JestWorkerFarm` helper type ([#​12753](https://github.com/facebook/jest/pull/12753))
##### Fixes
- `[*]` Lower Node 16 requirement to 16.10 from 16.13 due to a [Node bug](https://github.com/nodejs/node/issues/40014) that causes memory and performance issues ([#​12754](https://github.com/facebook/jest/pull/12754))
### [`v28.0.1`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2801)
[Compare Source](https://github.com/facebook/jest/compare/v28.0.0...v28.0.1)
##### Features
- `[jest-resolve]` Expose `ResolverOptions` type ([#​12736](https://github.com/facebook/jest/pull/12736))
##### Fixes
- `[expect]` Add missing dependency `jest-util` ([#​12744](https://github.com/facebook/jest/pull/12744))
- `[jest-circus]` Improve `test.concurrent` ([#​12748](https://github.com/facebook/jest/pull/12748))
- `[jest-resolve]` Correctly throw an error if `jsdom` test environment is used, but not installed ([#​12749](https://github.com/facebook/jest/pull/12749))
##### Chore & Maintenance
- `[jest-serializer]` Remove deprecated module from source tree ([#​12735](https://github.com/facebook/jest/pull/12735))
### [`v28.0.0`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2800)
[Compare Source](https://github.com/facebook/jest/compare/v27.5.1...v28.0.0)
##### Features
- `[babel-jest]` Export `createTransformer` function ([#​12399](https://github.com/facebook/jest/pull/12399))
- `[expect]` Expose `AsymmetricMatchers`, `MatcherFunction` and `MatcherFunctionWithState` interfaces ([#​12363](https://github.com/facebook/jest/pull/12363), [#​12376](https://github.com/facebook/jest/pull/12376))
- `[jest-circus]` Support error logging before retry ([#​12201](https://github.com/facebook/jest/pull/12201))
- `[jest-circus, jest-jasmine2]` Allowed classes and functions as `describe` and `it`/`test` names ([#​12484](https://github.com/facebook/jest/pull/12484))
- `[jest-cli, jest-config]` \[**BREAKING**] Remove `testURL` config, use `testEnvironmentOptions.url` instead ([#​10797](https://github.com/facebook/jest/pull/10797))
- `[jest-cli, jest-core]` Add `--shard` parameter for distributed parallel test execution ([#​12546](https://github.com/facebook/jest/pull/12546))
- `[jest-cli]` \[**BREAKING**] Remove undocumented `--timers` option ([#​12572](https://github.com/facebook/jest/pull/12572))
- `[jest-config]` \[**BREAKING**] Stop shipping `jest-environment-jsdom` by default ([#​12354](https://github.com/facebook/jest/pull/12354))
- `[jest-config]` \[**BREAKING**] Stop shipping `jest-jasmine2` by default ([#​12355](https://github.com/facebook/jest/pull/12355))
- `[jest-config, @​jest/types]` Add `ci` to `GlobalConfig` ([#​12378](https://github.com/facebook/jest/pull/12378))
- `[jest-config]` \[**BREAKING**] Rename `moduleLoader` to `runtime` ([#​10817](https://github.com/facebook/jest/pull/10817))
- `[jest-config]` \[**BREAKING**] Rename `extraGlobals` to `sandboxInjectedGlobals` ([#​10817](https://github.com/facebook/jest/pull/10817))
- `[jest-config]` \[**BREAKING**] Throw an error instead of showing a warning if multiple configs are used ([#​12510](https://github.com/facebook/jest/pull/12510))
- `[jest-config]` \[**BREAKING**] Do not normalize long deprecated configuration options `preprocessorIgnorePatterns`, `scriptPreprocessor`, `setupTestFrameworkScriptFile` and `testPathDirs` ([#​12701](https://github.com/facebook/jest/pull/12701))
- `[jest-cli, jest-core]` Add `--ignoreProjects` CLI argument to ignore test suites by project name ([#​12620](https://github.com/facebook/jest/pull/12620))
- `[jest-core]` Pass project config to `globalSetup`/`globalTeardown` function as second argument ([#​12440](https://github.com/facebook/jest/pull/12440))
- `[jest-core]` Stabilize test runners with event emitters ([#​12641](https://github.com/facebook/jest/pull/12641))
- `[jest-core, jest-watcher]` \[**BREAKING**] Move `TestWatcher` class to `jest-watcher` package ([#​12652](https://github.com/facebook/jest/pull/12652))
- `[jest-core]` Allow using Summary Reporter as stand-alone reporter ([#​12687](https://github.com/facebook/jest/pull/12687))
- `[jest-environment-jsdom]` \[**BREAKING**] Upgrade jsdom to 19.0.0 ([#​12290](https://github.com/facebook/jest/pull/12290))
- `[jest-environment-jsdom]` \[**BREAKING**] Add default `browser` condition to `exportConditions` for `jsdom` environment ([#​11924](https://github.com/facebook/jest/pull/11924))
- `[jest-environment-jsdom]` \[**BREAKING**] Pass global config to Jest environment constructor for `jsdom` environment ([#​12461](https://github.com/facebook/jest/pull/12461))
- `[jest-environment-jsdom]` \[**BREAKING**] Second argument `context` to constructor is mandatory ([#​12469](https://github.com/facebook/jest/pull/12469))
- `[jest-environment-node]` \[**BREAKING**] Add default `node` and `node-addon` conditions to `exportConditions` for `node` environment ([#​11924](https://github.com/facebook/jest/pull/11924))
- `[jest-environment-node]` \[**BREAKING**] Pass global config to Jest environment constructor for `node` environment ([#​12461](https://github.com/facebook/jest/pull/12461))
- `[jest-environment-node]` \[**BREAKING**] Second argument `context` to constructor is mandatory ([#​12469](https://github.com/facebook/jest/pull/12469))
- `[jest-environment-node]` Add all available globals to test globals, not just explicit ones ([#​12642](https://github.com/facebook/jest/pull/12642), [#​12696](https://github.com/facebook/jest/pull/12696))
- `[@jest/expect]` New module which extends `expect` with `jest-snapshot` matchers ([#​12404](https://github.com/facebook/jest/pull/12404), [#​12410](https://github.com/facebook/jest/pull/12410), [#​12418](https://github.com/facebook/jest/pull/12418))
- `[@jest/expect-utils]` New module exporting utils for `expect` ([#​12323](https://github.com/facebook/jest/pull/12323))
- `[@jest/fake-timers]` \[**BREAKING**] Rename `timers` configuration option to `fakeTimers` ([#​12572](https://github.com/facebook/jest/pull/12572))
- `[@jest/fake-timers]` \[**BREAKING**] Allow `jest.useFakeTimers()` and `projectConfig.fakeTimers` to take an options bag ([#​12572](https://github.com/facebook/jest/pull/12572))
- `[jest-haste-map]` \[**BREAKING**] `HasteMap.create` now returns a promise ([#​12008](https://github.com/facebook/jest/pull/12008))
- `[jest-haste-map]` Add support for `dependencyExtractor` written in ESM ([#​12008](https://github.com/facebook/jest/pull/12008))
- `[jest-mock]` \[**BREAKING**] Rename exported utility types `ClassLike`, `FunctionLike`, `ConstructorLikeKeys`, `MethodLikeKeys`, `PropertyLikeKeys`; remove exports of utility types `ArgumentsOf`, `ArgsType`, `ConstructorArgumentsOf` - TS builtin utility types `ConstructorParameters` and `Parameters` should be used instead ([#​12435](https://github.com/facebook/jest/pull/12435), [#​12489](https://github.com/facebook/jest/pull/12489))
- `[jest-mock]` Improve `isMockFunction` to infer types of passed function ([#​12442](https://github.com/facebook/jest/pull/12442))
- `[jest-mock]` \[**BREAKING**] Improve the usage of `jest.fn` generic type argument ([#​12489](https://github.com/facebook/jest/pull/12489))
- `[jest-mock]` Add support for auto-mocking async generator functions ([#​11080](https://github.com/facebook/jest/pull/11080))
- `[jest-mock]` Add `contexts` member to mock functions ([#​12601](https://github.com/facebook/jest/pull/12601))
- `[@jest/reporters]` Add GitHub Actions reporter ([#​11320](https://github.com/facebook/jest/pull/11320), [#​12658](https://github.com/facebook/jest/pull/12658))
- `[@jest/reporters]` Pass `reporterContext` to custom reporter constructors as third argument ([#​12657](https://github.com/facebook/jest/pull/12657))
- `[jest-resolve]` \[**BREAKING**] Add support for `package.json` `exports` ([#​11961](https://github.com/facebook/jest/pull/11961), [#​12373](https://github.com/facebook/jest/pull/12373))
- `[jest-resolve]` Support package self-reference ([#​12682](https://github.com/facebook/jest/pull/12682))
- `[jest-resolve, jest-runtime]` Add support for `data:` URI import and mock ([#​12392](https://github.com/facebook/jest/pull/12392))
- `[jest-resolve, jest-runtime]` Add support for async resolver ([#​11540](https://github.com/facebook/jest/pull/11540))
- `[jest-resolve]` \[**BREAKING**] Remove `browser?: boolean` from resolver options, `conditions: ['browser']` should be used instead ([#​12707](https://github.com/facebook/jest/pull/12707))
- `[jest-resolve]` Expose `JestResolver`, `AsyncResolver`, `SyncResolver`, `PackageFilter`, `PathFilter` and `PackageJSON` types ([#​12707](https://github.com/facebook/jest/pull/12707), ([#​12712](https://github.com/facebook/jest/pull/12712))
- `[jest-runner]` Allow `setupFiles` module to export an async function ([#​12042](https://github.com/facebook/jest/pull/12042))
- `[jest-runner]` Allow passing `testEnvironmentOptions` via docblocks ([#​12470](https://github.com/facebook/jest/pull/12470))
- `[jest-runner]` Expose `CallbackTestRunner`, `EmittingTestRunner` abstract classes and `CallbackTestRunnerInterface`, `EmittingTestRunnerInterface` to help typing third party runners ([#​12646](https://github.com/facebook/jest/pull/12646), [#​12715](https://github.com/facebook/jest/pull/12715))
- `[jest-runner]` Lock version of `source-map-support` to 0.5.13 ([#​12720](https://github.com/facebook/jest/pull/12720))
- `[jest-runtime]` \[**BREAKING**] `Runtime.createHasteMap` now returns a promise ([#​12008](https://github.com/facebook/jest/pull/12008))
- `[jest-runtime]` Calling `jest.resetModules` function will clear FS and transform cache ([#​12531](https://github.com/facebook/jest/pull/12531))
- `[jest-runtime]` \[**BREAKING**] Remove `Context` type export, it must be imported from `@jest/test-result` ([#​12685](https://github.com/facebook/jest/pull/12685))
- `[jest-runtime]` Add `import.meta.jest` ([#​12698](https://github.com/facebook/jest/pull/12698))
- `[@jest/schemas]` New module for JSON schemas for Jest's config ([#​12384](https://github.com/facebook/jest/pull/12384))
- `[@jest/source-map]` Migrate from `source-map` to `@jridgewell/trace-mapping` ([#​12692](https://github.com/facebook/jest/pull/12692))
- `[jest-transform]` \[**BREAKING**] Make it required for `process()` and `processAsync()` methods to always return structured data ([#​12638](https://github.com/facebook/jest/pull/12638))
- `[jest-test-result]` Add duration property to JSON test output ([#​12518](https://github.com/facebook/jest/pull/12518))
- `[jest-watcher]` \[**BREAKING**] Make `PatternPrompt` class to take `entityName` as third constructor parameter instead of `this._entityName` ([#​12591](https://github.com/facebook/jest/pull/12591))
- `[jest-worker]` \[**BREAKING**] Allow only absolute `workerPath` ([#​12343](https://github.com/facebook/jest/pull/12343))
- `[jest-worker]` \[**BREAKING**] Default to advanced serialization when using child process workers ([#​10983](https://github.com/facebook/jest/pull/10983))
- `[pretty-format]` New `maxWidth` parameter ([#​12402](https://github.com/facebook/jest/pull/12402))
##### Fixes
- `[*]` Use `sha256` instead of `md5` as hashing algortihm for compatibility with FIPS systems ([#​12722](https://github.com/facebook/jest/pull/12722))
- `[babel-jest]` \[**BREAKING**] Pass `rootDir` as `root` in Babel's options ([#​12689](https://github.com/facebook/jest/pull/12689))
- `[expect]` Move typings of `.not`, `.rejects` and `.resolves` modifiers outside of `Matchers` interface ([#​12346](https://github.com/facebook/jest/pull/12346))
- `[expect]` Throw useful error if `expect.extend` is called with invalid matchers ([#​12488](https://github.com/facebook/jest/pull/12488))
- `[expect]` Fix `iterableEquality` ignores other properties ([#​8359](https://github.com/facebook/jest/pull/8359))
- `[expect]` Fix print for the `closeTo` matcher ([#​12626](https://github.com/facebook/jest/pull/12626))
- `[jest-changed-files]` Improve `changedFilesWithAncestor` pattern for Mercurial SCM ([#​12322](https://github.com/facebook/jest/pull/12322))
- `[jest-circus, @​jest/types]` Disallow undefined value in `TestContext` type ([#​12507](https://github.com/facebook/jest/pull/12507))
- `[jest-config]` Correctly detect CI environment and update snapshots accordingly ([#​12378](https://github.com/facebook/jest/pull/12378))
- `[jest-config]` Pass `moduleTypes` to `ts-node` to enforce CJS when transpiling ([#​12397](https://github.com/facebook/jest/pull/12397))
- `[jest-config]` \[**BREAKING**] Add `mjs` and `cjs` to default `moduleFileExtensions` config ([#​12578](https://github.com/facebook/jest/pull/12578))
- `[jest-config, jest-haste-map]` Allow searching for tests in `node_modules` by exposing `retainAllFiles` ([#​11084](https://github.com/facebook/jest/pull/11084))
- `[jest-core]` \[**BREAKING**] Exit with status `1` if no tests are found with `--findRelatedTests` flag ([#​12487](https://github.com/facebook/jest/pull/12487))
- `[jest-core]` Do not report unref-ed subprocesses as open handles ([#​12705](https://github.com/facebook/jest/pull/12705))
- `[jest-each]` `%#` is not replaced with index of the test case ([#​12517](https://github.com/facebook/jest/pull/12517))
- `[jest-each]` Fixes error message with incorrect count of missing arguments ([#​12464](https://github.com/facebook/jest/pull/12464))
- `[jest-environment-jsdom]` Make `jsdom` accessible to extending environments again ([#​12232](https://github.com/facebook/jest/pull/12232))
- `[jest-environment-jsdom]` Log JSDOM errors more cleanly ([#​12386](https://github.com/facebook/jest/pull/12386))
- `[jest-environment-node]` Add `MessageChannel`, `MessageEvent` to globals ([#​12553](https://github.com/facebook/jest/pull/12553))
- `[jest-environment-node]` Add `structuredClone` to globals ([#​12631](https://github.com/facebook/jest/pull/12631))
- `[@jest/expect-utils]` \[**BREAKING**] Fix false positives when looking for `undefined` prop ([#​8923](https://github.com/facebook/jest/pull/8923))
- `[jest-haste-map]` Don't use partial results if file crawl errors ([#​12420](https://github.com/facebook/jest/pull/12420))
- `[jest-haste-map]` Make watchman existence check lazy+async ([#​12675](https://github.com/facebook/jest/pull/12675))
- `[jest-jasmine2, jest-types]` \[**BREAKING**] Move all `jasmine` specific types from `@jest/types` to its own package ([#​12125](https://github.com/facebook/jest/pull/12125))
- `[jest-jasmine2]` Do not set `duration` to `0` for skipped tests ([#​12518](https://github.com/facebook/jest/pull/12518))
- `[jest-matcher-utils]` Pass maxWidth to `pretty-format` to avoid printing every element in arrays by default ([#​12402](https://github.com/facebook/jest/pull/12402))
- `[jest-mock]` Fix function overloads for `spyOn` to allow more correct type inference in complex object ([#​12442](https://github.com/facebook/jest/pull/12442))
- `[jest-mock]` Handle overridden `Function.name` property ([#​12674](https://github.com/facebook/jest/pull/12674))
- `[@jest/reporters]` Notifications generated by the `--notify` flag are no longer persistent in GNOME Shell. ([#​11733](https://github.com/facebook/jest/pull/11733))
- `[@jest/reporters]` Move missing icon file which is needed for `NotifyReporter` class. ([#​12593](https://github.com/facebook/jest/pull/12593))
- `[@jest/reporters]` Update `v8-to-istanbul` ([#​12697](https://github.com/facebook/jest/pull/12697))
- `[jest-resolver]` Call custom resolver with core node.js modules ([#​12654](https://github.com/facebook/jest/pull/12654))
- `[jest-runner]` Correctly resolve `source-map-support` ([#​12706](https://github.com/facebook/jest/pull/12706))
- `[jest-worker]` Fix `Farm` execution results memory leak ([#​12497](https://github.com/facebook/jest/pull/12497))
##### Chore & Maintenance
- `[*]` \[**BREAKING**] Drop support for Node v10 and v15 and target first LTS `16.13.0` ([#​12220](https://github.com/facebook/jest/pull/12220))
- `[*]` \[**BREAKING**] Drop support for `typescript@3.8`, minimum version is now `4.3` ([#​11142](https://github.com/facebook/jest/pull/11142), [#​12648](https://github.com/facebook/jest/pull/12648))
- `[*]` Bundle all `.d.ts` files into a single `index.d.ts` per module ([#​12345](https://github.com/facebook/jest/pull/12345))
- `[*]` Use `globalThis` instead of `global` ([#​12447](https://github.com/facebook/jest/pull/12447))
- `[babel-jest]` \[**BREAKING**] Only export `createTransformer` ([#​12407](https://github.com/facebook/jest/pull/12407))
- `[docs]` Add note about not mixing `done()` with Promises ([#​11077](https://github.com/facebook/jest/pull/11077))
- `[docs, examples]` Update React examples to match with the new React guidelines for code examples ([#​12217](https://github.com/facebook/jest/pull/12217))
- `[docs]` Add clarity for module factory hoisting limitations ([#​12453](https://github.com/facebook/jest/pull/12453))
- `[docs]` Add more information about how code transformers work ([#​12407](https://github.com/facebook/jest/pull/12407))
- `[docs]` Add upgrading guide ([#​12633](https://github.com/facebook/jest/pull/12633))
- `[expect]` \[**BREAKING**] Remove support for importing `build/utils` ([#​12323](https://github.com/facebook/jest/pull/12323))
- `[expect]` \[**BREAKING**] Migrate to ESM ([#​12344](https://github.com/facebook/jest/pull/12344))
- `[expect]` \[**BREAKING**] Snapshot matcher types are moved to `@jest/expect` ([#​12404](https://github.com/facebook/jest/pull/12404))
- `[jest-cli]` Update `yargs` to v17 ([#​12357](https://github.com/facebook/jest/pull/12357))
- `[jest-config]` \[**BREAKING**] Remove `getTestEnvironment` export ([#​12353](https://github.com/facebook/jest/pull/12353))
- `[jest-config]` \[**BREAKING**] Rename config option `name` to `id` ([#​11981](https://github.com/facebook/jest/pull/11981))
- `[jest-create-cache-key-function]` Added README.md file with basic usage instructions ([#​12492](https://github.com/facebook/jest/pull/12492))
- `[@jest/core]` Use `index.ts` instead of `jest.ts` as main export ([#​12329](https://github.com/facebook/jest/pull/12329))
- `[jest-environment-jsdom]` \[**BREAKING**] Migrate to ESM ([#​12340](https://github.com/facebook/jest/pull/12340))
- `[jest-environment-node]` \[**BREAKING**] Migrate to ESM ([#​12340](https://github.com/facebook/jest/pull/12340))
- `[jest-haste-map]` Remove legacy `isRegExpSupported` ([#​12676](https://github.com/facebook/jest/pull/12676))
- `[@jest/fake-timers]` Update `@sinonjs/fake_timers` to v9 ([#​12357](https://github.com/facebook/jest/pull/12357))
- `[jest-jasmine2, jest-runtime]` \[**BREAKING**] Use `Symbol` to pass `jest.setTimeout` value instead of `jasmine` specific logic ([#​12124](https://github.com/facebook/jest/pull/12124))
- `[jest-phabricator]` \[**BREAKING**] Migrate to ESM ([#​12341](https://github.com/facebook/jest/pull/12341))
- `[jest-resolve]` \[**BREAKING**] Make `requireResolveFunction` argument mandatory ([#​12353](https://github.com/facebook/jest/pull/12353))
- `[jest-runner]` \[**BREAKING**] Remove some type exports from `@jest/test-result` ([#​12353](https://github.com/facebook/jest/pull/12353))
- `[jest-runner]` \[**BREAKING**] Second argument to constructor (`Context`) is not optional ([#​12640](https://github.com/facebook/jest/pull/12640))
- `[jest-serializer]` \[**BREAKING**] Deprecate package in favour of using `v8` APIs directly ([#​12391](https://github.com/facebook/jest/pull/12391))
- `[jest-snapshot]` \[**BREAKING**] Migrate to ESM ([#​12342](https://github.com/facebook/jest/pull/12342))
- `[jest-transform]` Update `write-file-atomic` to v4 ([#​12357](https://github.com/facebook/jest/pull/12357))
- `[jest-types]` \[**BREAKING**] Remove `Config.Glob` and `Config.Path` ([#​12406](https://github.com/facebook/jest/pull/12406))
- `[jest]` Use `index.ts` instead of `jest.ts` as main export ([#​12329](https://github.com/facebook/jest/pull/12329))
##### Performance
- `[jest-haste-map]` \[**BREAKING**] Default to `node` crawler over shelling out to `find` if `watchman` is not enabled ([#​12320](https://github.com/facebook/jest/pull/12320))
### [`v27.5.1`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2751)
[Compare Source](https://github.com/facebook/jest/compare/v27.5.0...v27.5.1)
##### Features
- `[jest-config]` Support comments in JSON config file ([#​12316](https://github.com/facebook/jest/pull/12316))
- `[pretty-format]` Expose `ConvertAnsi` plugin ([#​12308](https://github.com/facebook/jest/pull/12308))
##### Fixes
- `[expect]` Add type definitions for asymmetric `closeTo` matcher ([#​12304](https://github.com/facebook/jest/pull/12304))
- `[jest-cli]` Load binary via exported API ([#​12315](https://github.com/facebook/jest/pull/12315))
- `[jest-config]` Replace `jsonlint` with `parse-json` ([#​12316](https://github.com/facebook/jest/pull/12316))
- `[jest-repl]` Make module importable ([#​12311](https://github.com/facebook/jest/pull/12311) & [#​12315](https://github.com/facebook/jest/pull/12315))
##### Chore & Maintenance
- `[*]` Avoid anonymous default exports ([#​12313](https://github.com/facebook/jest/pull/12313))
### [`v27.5.0`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2750)
[Compare Source](https://github.com/facebook/jest/compare/v27.4.7...v27.5.0)
##### Features
- `[expect]` Add asymmetric matcher `expect.closeTo` ([#​12243](https://github.com/facebook/jest/pull/12243))
- `[jest-mock]` Added `mockFn.mock.lastCall` to retrieve last argument ([#​12285](https://github.com/facebook/jest/pull/12285))
##### Fixes
- `[expect]` Add a fix for `.toHaveProperty('')` ([#​12251](https://github.com/facebook/jest/pull/12251))
- `[jest-each, @​jest/globals]` Allow passing `ReadonlyArray` type of a table to `describe.each` and `test.each` ([#​12297](https://github.com/facebook/jest/pull/12297))
- `[@jest/globals]` Add missing `options` argument to `jest.doMock` typing ([#​12292](https://github.com/facebook/jest/pull/12292))
- `[jest-environment-node]` Add `atob` and `btoa` ([#​12269](https://github.com/facebook/jest/pull/12269))
- `[jest-matcher-utils]` Correct diff for expected asymmetric matchers ([#​12264](https://github.com/facebook/jest/pull/12264))
- `[jest-message-util]` Fix `.getTopFrame()` (and `toMatchInlineSnapshot()`) with `mjs` files ([#​12277](https://github.com/facebook/jest/pull/12277))
##### Chore & Maintenance
- `[*]` Update `graceful-fs` to `^4.2.9` ([#​11749](https://github.com/facebook/jest/pull/11749))
##### Performance
- `[jest-resolve]` perf: skip error creation on not found `stat` calls ([#​11749](https://github.com/facebook/jest/pull/11749))
### [`v27.4.7`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2747)
[Compare Source](https://github.com/facebook/jest/compare/v27.4.6...v27.4.7)
##### Fixes
- `jest-config` Add missing `@babel/core` dependency ([#​12216](https://github.com/facebook/jest/pull/12216))
### [`v27.4.6`](https://github.com/facebook/jest/blob/HEAD/CHANGELOG.md#​2746)
[Compare Source](https://github.com/facebook/jest/compare/v27.4.5...v27.4.6)
##### Fixes
- `[jest-environment-node]` Add `AbortSignal` ([#​12157](https://github.com/facebook/jest/pull/12157))
- `[jest-environment-node]` Add Missing node global `performance` ([#​12002](https://github.com/facebook/jest/pull/12002))
- `[jest-runtime]` Handle missing `mocked` property ([#​12213](https://github.com/facebook/jest/pull/12213))
- `[@jest/transform]` Update dependency package `pirates` to 4.0.4 ([#​12002](https://github.com/facebook/jest/pull/12002))
##### Performance
- `jest-config` perf: only register ts-node once when loading TS config files ([#​12160](https://github.com/facebook/jest/pull/12160))
</details>
---
### Configuration
📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).
🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.
♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.
🔕 **Ignore**: Close this PR and you won't be reminded about these updates again.
---
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---
This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
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Summary
It is not the best idea to add another configuration option, but I think this one is worth it.
First of all, the change is minimal.
jest-workerhas threads based workers already. AddingworkerThreadsoption simply allows using them.Quick testing shows that there is a performance gain using worker threads (the PR adding them also mentioned that, see #7408). Might be good idea to use worker threads by default in the future. If that does not work for some reason, opting in for better performance is good enough.
Also having
workerThreadsoption allows users to try out worker threads already already now. If the defaults gets flipped in the future,workerThreadsoption will be needed to allow opting out.Test plan
Tested it locally linking Jest packages to another repo.
Adding e2e test sounds tricky. Perhaps some unit tests could be added?