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Jest 30.4.0

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Release Notes

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release-notesgithub.com/jestjs/jest · 77 Zeilen
  1. Big release! 😀
  3. Main feature is a rewrite of our custom runtime in preparation for stabilisation of native support of ESM. As part of that work `require(esm)` module is now supported on Node 24.9+ (still requires `--experimental-vm-modules` like before).
  5. In addition we now support fake timers for the recently released `Temporal` API in Node v26.
  7. React 19 is also supported properly in `pretty-format`, meaning snapshots of React components now work like they should.
  9. Due to all the changes, there might be regressions that snuck in. Please report them!
  11. Full list of changes below
  13. ## Features
  15. - `[babel-jest]` Support collecting coverage from `.mts`, `.cts` (and other) files ([#15994](https://github.com/jestjs/jest/pull/15994))
  16. - `[jest-circus, jest-cli, jest-config, jest-core, jest-jasmine2, jest-types]` Add `--collect-tests` flag to discover and list tests without executing them ([#16006](https://github.com/jestjs/jest/pull/16006))
  17. - `[jest-config, jest-runner, jest-worker]` Add `workerGracefulExitTimeout` config option to control how long workers are given to exit before being force-killed ([#15984](https://github.com/jestjs/jest/pull/15984))
  18. - `[jest-config]` Add support for `jest.config.mts` as a valid configuration file ([#16005](https://github.com/jestjs/jest/pull/16005))
  19. - `[jest-config, jest-core, jest-reporters, jest-runner]` `verbose` and `silent` can now be set per-project; the project-level value overrides the global value for that project's tests ([#16133](https://github.com/jestjs/jest/pull/16133))
  20. - `[@jest/fake-timers]` Accept `Temporal.Duration` in `jest.advanceTimersByTime()` and `jest.advanceTimersByTimeAsync()` ([#16128](https://github.com/jestjs/jest/pull/16128))
  21. - `[@jest/fake-timers]` Accept `Temporal.Instant` and `Temporal.ZonedDateTime` in `jest.setSystemTime()` and `useFakeTimers({now})` ([#16128](https://github.com/jestjs/jest/pull/16128))
  22. - `[@jest/fake-timers]` Support faking `Temporal.Now.*` ([#16131](https://github.com/jestjs/jest/pull/16131))
  23. - `[jest-mock]` Add `clearMocksOnScope(scope)` on `ModuleMocker` for clearing every mock function exposed on a scope object ([#16088](https://github.com/jestjs/jest/pull/16088))
  24. - `[jest-resolve]` Add `canResolveSync()` on `Resolver` so callers can detect when a user-configured resolver only exports an `async` hook ([#16064](https://github.com/jestjs/jest/pull/16064))
  25. - `[jest-runtime]` Use synchronous `evaluate()` for ES modules without top-level `await` on Node versions that support it (v24.9+), and prefer the synchronous transform path when a sync transformer is configured ([#16062](https://github.com/jestjs/jest/pull/16062))
  26. - `[jest-runtime]` Support `require()` of ES modules on Node v24.9+ ([#16074](https://github.com/jestjs/jest/pull/16074))
  27. - `[jest-runtime]` Validate TC39 import attributes (`with { type: 'json' }`) on ESM imports ([#16127](https://github.com/jestjs/jest/pull/16127))
  28. - `[@jest/transform]` Add `canTransformSync(filename)` on `ScriptTransformer` so callers can pick the sync vs async transform path ([#16062](https://github.com/jestjs/jest/pull/16062))
  29. - `[jest-util]` Add `isError` helper ([#16076](https://github.com/jestjs/jest/pull/16076))
  30. - `[pretty-format]` Support React 19 ([#16123](https://github.com/jestjs/jest/pull/16123))
  32. ## Fixes
  34. - `[expect-utils]` Fix `toStrictEqual` failing on `structuredClone` results due to cross-realm constructor mismatch ([#15959](https://github.com/jestjs/jest/pull/15959))
  35. - `[@jest/expect-utils]` Prevent `toMatchObject`/subset matching from throwing when encountering exotic iterables ([#15952](https://github.com/jestjs/jest/pull/15952))
  36. - `[fake-timers]` Convert `Date` to milliseconds before passing to `@sinonjs/fake-timers` ([#16029](https://github.com/jestjs/jest/pull/16029))
  37. - `[jest]` Export `GlobalConfig` and `ProjectConfig` TypeScript types ([#16132](https://github.com/jestjs/jest/pull/16132))
  38. - `[jest-circus]` Prevent crash when `asyncError` is undefined for non-Error throws ([#16003](https://github.com/jestjs/jest/pull/16003))
  39. - `[jest-circus, jest-jasmine2]` Include `Error.cause` in JSON `failureMessages` output ([#15967](https://github.com/jestjs/jest/pull/15967))
  40. - `[jest-config]` Fix preset path resolution on Windows when the preset uses subpath `exports` ([#15961](https://github.com/jestjs/jest/pull/15961))
  41. - `[jest-config]` Allow `collectCoverage` and `coverageProvider` in project config without a validation warning ([#16132](https://github.com/jestjs/jest/pull/16132))
  42. - `[jest-config]` Project config validator now emits "is not supported in an individual project configuration" instead of "probably a typing mistake" for known global-only options ([#16132](https://github.com/jestjs/jest/pull/16132))
  43. - `[jest-environment-node]` Fix `--localstorage-file` warning on Node 25+ ([#16086](https://github.com/jestjs/jest/pull/16086))
  44. - `[jest-reporters]` Apply global coverage threshold to unmatched pattern files in addition to glob/path thresholds ([#16137](https://github.com/jestjs/jest/pull/16137))
  45. - `[jest-reporters, jest-runner, jest-runtime, jest-transform]` Fix coverage report not showing correct code coverage when using `projects` config option ([#16140](https://github.com/jestjs/jest/pull/16140))
  46. - `[jest-runtime]` Resolve `expect` and `@jest/expect` from the internal module registry so test-file imports share the same `JestAssertionError` as the global `expect` ([#16130](https://github.com/jestjs/jest/pull/16130))
  47. - `[jest-runtime]` Improve CJS-from-ESM interop: `__esModule`/Babel default unwrap, broader named-export coverage, and shared CJS singleton across importers ([#16050](https://github.com/jestjs/jest/pull/16050))
  48. - `[jest-runtime]` Load `.js` files with ESM syntax but no `"type":"module"` marker as native ESM ([#16050](https://github.com/jestjs/jest/pull/16050))
  49. - `[jest-runtime]` Extend the `.js`-with-ESM-syntax fallback to `require()` on Node v24.9+ - falls back to `require(esm)` when the CJS parser rejects ESM syntax ([#16078](https://github.com/jestjs/jest/pull/16078))
  50. - `[jest-runtime]` Fix deadlocks and double-evaluation in concurrent ESM and wasm imports ([#16050](https://github.com/jestjs/jest/pull/16050))
  51. - `[jest-runtime]` Fix error when `require()` is called after the Jest environment has been torn down ([#15951](https://github.com/jestjs/jest/pull/15951))
  52. - `[jest-runtime]` Fix missing error when `import()` is called after the Jest environment has been torn down ([#16080](https://github.com/jestjs/jest/pull/16080))
  53. - `[jest-runtime]` Fix virtual `unstable_mockModule` registrations not respected in ESM ([#16081](https://github.com/jestjs/jest/pull/16081))
  54. - `[jest-runtime]` Apply `moduleNameMapper` when resolving modules with `require.resolve()` and the `paths` option ([#16135](https://github.com/jestjs/jest/pull/16135))
  56. ## Chore & Maintenance
  58. - `[@jest/fake-timers]` Upgrade `@sinonjs/fake-timers` ([#16139](https://github.com/jestjs/jest/pull/16139))
  59. - `[jest-runtime]` Use synchronous `linkRequests` / `instantiate` for ESM linking on Node v24.9+ ([#16063](https://github.com/jestjs/jest/pull/16063))
  61. ## New Contributors
  62. * @alexander-turner made their first contribution in https://github.com/jestjs/jest/pull/16006
  63. * @jmuransky made their first contribution in https://github.com/jestjs/jest/pull/16050
  64. * @afiiif made their first contribution in https://github.com/jestjs/jest/pull/16047
  65. * @JamieMagee made their first contribution in https://github.com/jestjs/jest/pull/15959
  66. * @Gdhanush-13 made their first contribution in https://github.com/jestjs/jest/pull/16029
  67. * @ashoknarayan made their first contribution in https://github.com/jestjs/jest/pull/16003
  68. * @domarmstrong made their first contribution in https://github.com/jestjs/jest/pull/15994
  69. * @ragini-pandey made their first contribution in https://github.com/jestjs/jest/pull/15951
  70. * @manthansubhash01 made their first contribution in https://github.com/jestjs/jest/pull/16005
  71. * @cedricherzog-passbolt made their first contribution in https://github.com/jestjs/jest/pull/16021
  72. * @jcwatson11 made their first contribution in https://github.com/jestjs/jest/pull/15984
  73. * @umeshmore45 made their first contribution in https://github.com/jestjs/jest/pull/15961
  74. * @mhughes2012 made their first contribution in https://github.com/jestjs/jest/pull/15952
  75. * @kimsuyeon0916 made their first contribution in https://github.com/jestjs/jest/pull/16135
  77. **Full Changelog**: https://github.com/jestjs/jest/compare/v30.3.0...v30.4.0

auf github ansehenimported 2026-09-28 über npm