Fixes [jest-config] Don't warn about global-only options in the config that supplies the global config - the root config a project resolves to, or the first entry of --projects when no root config is passed (#16411) [jest-config, jest-types] Stop accepting reporters, coverageReporters, workerIdleMemoryLimit, cwd and runnerOptions in a project config - they were silently ignored, and now warn like…
On a personal note: King Harald V of Norway passed away this morning. He ascended the throne 35 years ago, two months before I was born. This release is dedicated to his memory. Hvil i fred 🇳🇴 This is a big release. It touches jest-runtime, jest-resolve and jest-haste-map in many places, and with this many changes there might be regressions 😬. If your suite behaves differently after upgrading, ple…
Fixes [jest-runtime] Fix named imports from CJS modules whose module.exports is a function with own-property exports (#16150) Full Changelog: v30.4.1...v30.4.2
Features [jest-config, jest-core, jest-runner, jest-schemas, jest-types] Allow custom runner configuration options via tuple format ['runner-path', {options}] (#16141) Fixes [jest-runtime] Align CJS-from-ESM default export with Node: module.exports is always the ESM default, __esModule unwrapping is no longer applied (#16143) Full Changelog: v30.4.0...v30.4.1
Big release! 😀 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). In addition we now support fake timers for the recently released Temporal API in Node v26. React 19 is also supported properly in pretty-format, meani…
Features [jest-config] Add defineConfig and mergeConfig helpers for type-safe Jest config (#15844) [jest-fake-timers] Add setTimerTickMode to configure how timers advance [*] Reduce token usage when run through LLMs (3f17932) Fixes [jest-config] Keep CLI coverage output when using --json with --outputFile (#15918) [jest-mock] Use Symbol from test environment (#15858) [jest-reporters] Fix issue whe…
Chore & Maintenance [*] Update example repo for testing React Native projects (#15832) [*] Update jest-watch-typeahead to v3 (#15830) Features [jest-environment-jsdom-abstract] Add support for JSDOM v27 (#15834) Fixes [babel-jest] Export the TransformerConfig interface (#15820) [jest-config] Fix jest.config.ts with TS loader specified in docblock pragma (#15839)
Fixes Fix unstable_mockModule with node: 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] Fix it.con…
v30.0.5