29.4.0

Features

• [expect, @jest/expect-utils] Support custom equality testers (#13654)
• [jest-config, jest-worker] Use os.availableParallelism if available to calculate number of workers to spawn (#13738)
• [@jest/globals, jest-mock] Add jest.replaceProperty() that replaces property value (#13496)
• [jest-haste-map] ignore Sapling vcs directories (.sl/) (#13674)
• [jest-resolve] Support subpath imports (#13705, #13723, #13777)
• [jest-runtime] Add jest.isolateModulesAsync for scoped module initialization of asynchronous functions (#13680)
• [jest-runtime] Add jest.isEnvironmentTornDown function (#13741)
• [jest-test-result] Added skipped and focused status to FormattedTestResult (#13700)
• [jest-transform] Support for asynchronous createTransformer (#13762)

Fixes

• [jest-environment-node] Fix non-configurable globals (#13687)
• [@jest/expect-utils] toMatchObject should handle Symbol properties (#13639)
• [jest-mock] Fix mockReset and resetAllMocks undefined return value(#13692)
• [jest-resolve] Add global paths to require.resolve.paths (#13633)
• [jest-resolve] Correct node core module detection when using node: specifiers (#13806)
• [jest-runtime] Support WASM files that import JS resources (#13608)
• [jest-runtime] Use the scriptTransformer cache in jest-runner (#13735)
• [jest-runtime] Enforce import assertions when importing JSON in ESM (#12755 & #13805)
• [jest-snapshot] Make sure to import babel outside of the sandbox (#13694)
• [jest-transform] Ensure the correct configuration is passed to preprocessors specified multiple times in the transform option (#13770)

Chore & Maintenance

• [@jest/fake-timers] Update @sinonjs/fake-timers (#13612)
• [docs] Improve custom puppeteer example to prevent worker warnings (#13619)

29.2.0

Features

• [@jest/cli, jest-config] A seed for the test run will be randomly generated, or set by a CLI option (#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)
• [jest-config] Add readInitialConfig utility function (#13356)
• [jest-core] Allow testResultsProcessor to be async (#13343)
• [@jest/environment, jest-environment-node, jest-environment-jsdom, jest-runtime] Add getSeed() to the jest object (#13400)
• [expect, @jest/expect-utils] Allow isA utility to take a type argument (#13355)
• [expect] Expose AsyncExpectationResult and SyncExpectationResult types (#13411)

Fixes

• [babel-plugin-jest-hoist] Ignore TSTypeQuery when checking for hoisted references (#13367)
• [jest-core] Fix detectOpenHandles false positives for some special objects such as TLSWRAP (#13414)
• [jest-mock] Fix mocking of getters and setters on classes (#13398)
• [jest-reporters] Revert: Transform file paths into hyperlinks (#13399)
• [@jest/types] Infer type of each table correctly when the table is a tuple or array (#13381)
• [@jest/types] Rework typings to allow the *ReturnedWith matchers to be called with no argument (#13385)

Chore & Maintenance

• [*] Update @babel/* deps, resulting in slightly different stack traces for each (#13422)

Performance

• [jest-runner] Do not instrument v8 coverage data if coverage should not be collected (#13282)

29.0.2

Features

• [jest-transform] Expose TransformFactory type (#13184)

Fixes

• [babel-plugin-jest-hoist] Support imported jest in mock factory (#13188)
• [jest-mock] Align the behavior and return type of generateFromMetadata method (#13207)
• [jest-runtime] Support jest.resetModules() with ESM (#13211)

29.0.0

Features

• [expect] [BREAKING] Differentiate between MatcherContext MatcherUtils and MatcherState types (#13141)
• [jest-circus] Add support for test.failing.each (#13142)
• [jest-config] [BREAKING] Make snapshotFormat default to escapeString: false and printBasicPrototype: false (#13036)
• [jest-config] [BREAKING] Remove undocumented collectCoverageOnlyFrom option (#13156)
• [jest-environment-jsdom] [BREAKING] Upgrade to jsdom@20 (#13037, #13058)
• [@jest/globals] Add jest.Mocked, jest.MockedClass, jest.MockedFunction and jest.MockedObject utility types (#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, #13124)
• [jest-mock] [BREAKING] Change the default jest.mocked helper’s behavior to deep mocked (#13125)
• [jest-snapshot] [BREAKING] Let babel find config when updating inline snapshots (#13150)
• [@jest/test-result, @jest/types] [BREAKING] Replace Bytes and Milliseconds types with number (#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, #13105, #13106, #13107)
• [pretty-format] [BREAKING] Remove ConvertAnsi plugin in favour of jest-serializer-ansi-escapes (#13040)
• [pretty-format] Allow to opt out from sorting object keys with compareKeys: null (#12443)

Fixes

• [jest-config] Fix testing multiple projects with TypeScript config files (#13099)
• [@jest/expect-utils] Fix deep equality of ImmutableJS Record (#13055)
• [jest-haste-map] Increase the maximum possible file size that jest-haste-map can handle (#13094)
• [jest-runtime] Properly support CJS re-exports from dual packages (#13170)
• [jest-snapshot] Make prettierPath optional in SnapshotState (#13149)
• [jest-snapshot] Fix parsing error from inline snapshot files with JSX (#12760)
• [jest-worker] When a process runs out of memory worker exits correctly and doesn't spin indefinitely (#13054)

Chore & Maintenance

• [*] [BREAKING] Drop support for Node v12 and v17 (#13033)
• [docs] Fix webpack name (#13049)
• [docs] Explicit how to set n for --bail (#13128)
• [docs] Update Enzyme URL (#13166)
• [jest-leak-detector] Remove support for weak-napi (#13035)
• [jest-snapshot] [BREAKING] Require rootDir as argument to SnapshotState (#13150)

28.1.3

Features

• [jest-leak-detector] Use native FinalizationRegistry when it exists to get rid of external C dependency (#12973)

Fixes

• [jest-changed-files] Fix a lock-up after repeated invocations (#12757)
• [@jest/expect-utils] Fix deep equality of ImmutableJS OrderedSets (#12977)
• [jest-mock] Add index signature support for spyOn types (#13013, #13020)
• [jest-snapshot] Fix indentation of awaited inline snapshots (#12986)

Chore & Maintenance

• [*] Replace internal usage of pretty-format/ConvertAnsi with jest-serializer-ansi-escapes (#12935, #13004)
• [docs] Update spyOn docs (#13000)

28.1.1

Features

• [jest] Expose Config type (#12848)
• [@jest/reporters] Improve GitHubActionsReporters annotation format (#12826)
• [@jest/types] Infer argument types passed to test and describe callback functions from each tables (#12885, #12905)

Fixes

• [@jest/expect-utils] Fix deep equality of ImmutableJS OrderedMaps (#12899)
• [jest-docblock] Handle multiline comments in parseWithComments (#12845)
• [jest-mock] Improve spyOn error messages (#12901)
• [jest-runtime] Correctly report V8 coverage with resetModules: true (#12912)
• [jest-worker] Make JestWorkerFarm helper type to include methods of worker module that take more than one argument (#12839)

Chore & Maintenance

• [docs] Updated docs to indicate that jest-environment-jsdom is a separate package #12828
• [docs] Document the comments used by coverage providers #12835
• [docs] Use docusaurus-remark-plugin-tab-blocks to format tabs with code examples (#12859)
• [jest-haste-map] Bump walker version (#12324)

28.0.2

Features

• [jest-worker] Add JestWorkerFarm helper type (#12753)

Fixes

• [*] Lower Node 16 requirement to 16.10 from 16.13 due to a Node bug that causes memory and performance issues (#12754)