Chore & Maintenance

• [*] Update example repo for testing React Native projects (#15832)
• [*] Updatejest-watch-typeahead to v3 (#15830)

Features

• [jest-environment-jsdom-abstract] Add support for JSDOM v27 (#15834)

Fixes

• [babel-jest] Export theTransformerConfig interface (#15820)
• [jest-config] Fixjest.config.ts with TS loader specified in docblock pragma (#15839)

Fixes

• Fixunstable_mockModule withnode: prefixed core modules.

Fixes

• [jest-snapshot-utils] Correct snapshot header regexp to work with newline across OSes (#15803)

Fixes

• [jest-snapshot-utils] Fix deprecated goo.gl snapshot warning not handling Windows end-of-line sequences (#15800)

Features

• [jest-leak-detector] Configurable GC aggressiveness regarding to V8 heap snapshot generation (#15793)
• [jest-runtime] Reduce redundant ReferenceError messages
• [jest-core] Include test modules that failed to load when --onlyFailures is active

Fixes

• `[jest-snapshot-utils] Fix deprecated goo.gl snapshot guide link not getting replaced with fully canonical URL (#15787)
• [jest-circus] Fixit.concurrent not working withdescribe.skip (#15765)
• [jest-snapshot] Fix mangled inline snapshot updates when used with Prettier 3 and CRLF line endings
• [jest-runtime] Importing from@jest/globals in more than one file no longer breaks relative paths (#15772)

Chore

• [expect] Update docblock fortoContain() to display info on substring check (#15789)

What's Changed

Fixes

• [jest-matcher-utils] Make 'deepCyclicCopyObject' safer by setting descriptors to a null-prototype object (#15689)
• [jest-util] Make garbage collection protection property writable (#15689)

Full Changelog:https://github.com/jestjs/jest/blob/main/CHANGELOG.md

What's Changed

Features

• [jest-resolver] Implement thedefaultAsyncResolver (#15679)

Fixes

• [jest-resolver] Resolve builtin modules correctly (#15683)
• [jest-environment-node, jest-util] Avoid setting globals cleanup protection symbol when feature is off (#15684)

Chore & Maintenance

• [*] Remove and deprecatejest-repl package (#15673)
• [jest-resolver] Replace customisBuiltinModule with node'sisBuiltin (#15685)

New Contributors

• @vovkasm made their first contribution in#15687

Full Changelog:https://github.com/jestjs/jest/blob/main/CHANGELOG.md

Contributors

Today we are happy to announce the release of Jest 30. This release features a substantial number of changes, fixes, and improvements. While it is one of the largest major releases of Jest ever, we admit that three years for a major release is too long. In the future, we are aiming to make more frequent major releases to keep Jest great for the next decade.

If you want to skip all the news and just get going, runnpm install jest@^30.0.0 and follow the migration guide:Upgrading from Jest 29 to 30.

Read the full blog post

Features

• [*] RenamedglobalsCleanupMode toglobalsCleanup and--waitNextEventLoopTurnForUnhandledRejectionEvents to--waitForUnhandledRejections
• [expect] AddArrayOf asymmetric matcher for validating array elements. (#15567)
• [babel-jest] Add optionexcludeJestPreset to allow opting out ofbabel-preset-jest (#15164)
• [expect] Revert#15038 to fixexpect(fn).toHaveBeenCalledWith(expect.objectContaining(...)) when there are multiple calls (#15508)
• [jest-circus, jest-cli, jest-config] AddwaitNextEventLoopTurnForUnhandledRejectionEvents flag to minimise performance impact of correct detection of unhandled promise rejections introduced in#14315 (#14681)
• [jest-circus] Add awaitBeforeRetry option tojest.retryTimes (#14738)
• [jest-circus] Add aretryImmediately option tojest.retryTimes (#14696)
• [jest-circus, jest-jasmine2] AllowsetupFilesAfterEnv to export an async function (#10962)
• [jest-circus, jest-test-result] AddstartedAt timestamp inTestCaseResultObject withinonTestCaseResult (#15145)
• [jest-cli] ExportbuildArgv (#15310)
• [jest-config] [BREAKING] Addmts andcts to defaultmoduleFileExtensions config (#14369)
• [jest-config] [BREAKING] UpdatetestMatch andtestRegex default option for supportingmjs,cjs,mts, andcts (#14584)
• [jest-config] Loads config file from provided path inpackage.json (#14044)
• [jest-config] Allow loadingjest.config.cts files (#14070)
• [jest-config] ShowrootDir in error message when apreset fails to load (#15194)
• [jest-config] Support loading TS config files usingesbuild-register via docblock loader (#15190)
• [jest-config] Allow passing TS config loader options via docblock comment (#15234)
• [jest-config] If Node is running with type stripping enabled, do not require a TS loader (#15480)
• [@jest/core] Group together open handles with the same stack trace (#13417, &#14789)
• [@jest/core] AddperfStats to surface test setup overhead (#14622)
• [@jest/core] [BREAKING] Changed--filter to accept an object with shape{ filtered: Array<string> } to matchdocumentation (#13319)
• [@jest/core] Support--outputFile option for--listTests (#14980)
• [@jest/core] Stringify Errors properly with--json flag (#15329)
• [@jest/core, @jest/test-sequencer] [BREAKING] ExposesglobalConfig &contexts toTestSequencer (#14535, &#14543)
• [jest-each] Introduce%$ option to add number of the test to its title (#14710)
• [@jest/environment] [BREAKING] Remove deprecatedjest.genMockFromModule() (#15042)
• [@jest/environment] [BREAKING] Remove unnecessary defensive code (#15045)
• [jest-environment-jsdom] [BREAKING] Upgrade JSDOM to v22 (#13825)
• [@jest/environment-jsdom-abstract] Introduce new package which abstracts over thejsdom environment, allowing usage of custom versions of JSDOM (#14717)
• [jest-environment-node] Update jest environment with dispose symbolsSymbol (#14888 &#14909)
• [expect, @jest/expect] [BREAKING] Add type inference for function parameters inCalledWith assertions (#15129)
• [@jest/expect-utils] Properly compare all types ofTypedArrays (#15178)
• [@jest/fake-timers] [BREAKING] Upgrade@sinonjs/fake-timers to v13 (#14544 &#15470)
• [@jest/fake-timers] Exposing new modern timers functionadvanceTimersToFrame() which advances all timers by the needed milliseconds to execute callbacks currently scheduled withrequestAnimationFrame (#14598)
• [jest-matcher-utils] AddSERIALIZABLE_PROPERTIES to allow custom serialization of objects (#14893)
• [jest-mock] Add support for the Explicit Resource Management proposal to use theusing keyword withjest.spyOn(object, methodName) (#14895)
• [jest-reporters] Add support forDEC mode 2026 (#15008)
• [jest-resolver] Supportfile:// URLs as paths (#15154)
• [jest-resolve,jest-runtime,jest-resolve-dependencies] Pass the conditions when resolving stub modules (#15489)
• [jest-runtime] Exposing new modern timers functionjest.advanceTimersToFrame() from@jest/fake-timers (#14598)
• [jest-runtime] Supportimport.meta.filename andimport.meta.dirname (available fromNode 20.11) (#14854)
• [jest-runtime] Supportimport.meta.resolve (#14930)
• [jest-runtime] [BREAKING] Make it mandatory to passglobalConfig to theRuntime constructor (#15044)
• [jest-runtime] Addunstable_unmockModule (#15080)
• [jest-runtime] AddonGenerateMock transformer callback for auto generated callbacks (#15433 &#15482)
• [jest-runtime] [BREAKING] Usevm.compileFunction overvm.Script (#15461)
• [@jest/schemas] Upgrade@sinclair/typebox to v0.34 (#15450)
• [@jest/types]test.each(): Accept a readonly (as const) table properly (#14565)
• [@jest/types] Improve argument type inference passed totest anddescribe callback functions fromeach tables (#14920)
• [jest-snapshot] [BREAKING] Add support forError causes in snapshots (#13965)
• [jest-snapshot] Support Prettier 3 (#14566)
• [@jest/util-snapshot] Extract utils used by tooling fromjest-snapshot into its own package (#15095)
• [pretty-format] [BREAKING] Do not render empty string children ('') in React plugin (#14470)

Fixes

• [expect] ShowAggregateError to display (#15346)
• [*] Replaceexit withexit-x (#15399)
• [babel-plugin-jest-hoist] Usedenylist instead of the deprecatedblacklist for Babel 8 support (#14109)
• [babel-plugin-jest-hoist] Do not rely on buggy Babel behaviour (#15415)
• [expect] Check error instance type fortoThrow/toThrowError (#14576)
• [expect] Improve diff for failingexpect.objectContaining (#15038)
• [expect] UseArray.isArray to check if an array is anArray (#15101)
• [expect] Fix Errorcause assertion errors (#15339)
• [jest-changed-files] Prin...

Contributors

What's Changed

• feat(runtime): usecompileFunction overnew Script by@SimenB in#15461

Full Changelog:v30.0.0-beta.3...v30.0.0-beta.4

Contributors

Jest 30 is shipping soon. Please help us test the beta and open issues and Pull Requests if you run into any issues.

Major changes & improvements

• chore!: drop support for node.js version 16. by@MillerSvt in#15623
• chore: update jsdom to v26.0.0 by@andreibereczki in#15473
• Mitigate memory leaks in jest-environment-node by@eyalroth in#15215

Fixes

• fix: pass resolve conditions when loading stub module by@andrew-the-drawer in#15489
• fix: refactor _importCoreModule so required core module is consistent by@jonasongg in#15517
• fix: error cause bug by@BondarenkoAlex in#15339
• fix: ignore Window object in deepCyclicCopyReplaceable by@MillerSvt in#15590
• fix(jest-haste-map): Fix clobbering/errors when multiple configs use different haste impls by@robhogan in#15522
• fix: printAggregateError to display by@BondarenkoAlex in#15346
• Prevent EPERM windows transform issue from failing tests by@lukeapage in#11104
• fix(objectContaining): Fixed a bug where ObjectContaining matched with non-object values. by@mohammednumaan in#15463
• Fix calledWith(objectContaining) when there are multiple calls by@ecraig12345 in#15508
• feat(expect): add ArrayOf asymmetric matcher by@icholy in#15567
• fix: jest-circus shares events among imports#11483 by@satanTime in#11529
• fix: worker state by@phawxby in#15610

New Contributors

• @andrew-the-drawer made their first contribution in#15489
• @jonasongg made their first contribution in#15517
• @danielrentz made their first contribution in#15514
• @co63oc made their first contribution in#15527
• @thypon made their first contribution in#15559
• @pengqiseven made their first contribution in#15602
• @anbnyc made their first contribution in#15521
• @tez3998 made their first contribution in#15359
• @dev-intj made their first contribution in#15605
• @zakingslayerv22 made their first contribution in#15583
• @loganrosen made their first contribution in#15498
• @dancer1325 made their first contribution in#15486
• @sebastiancarlos made their first contribution in#15372
• @cgm-16 made their first contribution in#15551
• @ecraig12345 made their first contribution in#15508
• @icholy made their first contribution in#15567
• @satanTime made their first contribution in#11529
• @JounQin made their first contribution in#15617
• @Dreamsorcerer made their first contribution in#15622
• @andreibereczki made their first contribution in#15473

Full Changelog:https://github.com/jestjs/jest/blob/main/CHANGELOG.md

Contributors