23.2.0

Features

• [jest-each] Add support for keyPaths in test titles (#6457)
• [jest-cli] Add jest --init option that generates a basic configuration file with a short description for each option (#6442)
• [jest.retryTimes] Add jest.retryTimes() option that allows failed tests to be retried n-times when using jest-circus. (#6498)

Fixes

• [docs] Fixed error in documentation for expect.not.arrayContaining(array). (#6491)
• [jest-cli] Add check to make sure one or more tests have run before notifying when using --notify (#6495)
• [jest-cli] Pass globalConfig as a parameter to globalSetup and globalTeardown functions (#6486)
• [jest-config] Add missing options to the defaults object (#6428)
• [expect] Using symbolic property names in arrays no longer causes the toEqual matcher to fail (#6391)
• [expect] toEqual no longer tries to compare non-enumerable symbolic properties, to be consistent with non-symbolic properties. (#6398)
• [jest-util] console.timeEnd now properly log elapsed time in milliseconds. (#6456)
• [jest-mock] Fix MockNativeMethods access in react-native jest.mock() (#6505)
• [jest-cli] Fix reporters for moduleName = 'default' (#6542)

Chore & Maintenance

• [docs] Add jest-each docs for 1 dimensional arrays (#6444)

23.0.1

Chore & Maintenance

• [jest-jasemine2] Add dependency on jest-each (#6308)
• [jest-each] Move jest-each into core Jest (#6278)
• [examples] Update typescript example to using ts-jest (#6260)

Fixes

• [pretty-format] Serialize inverse asymmetric matchers correctly (#6272)

jest 22.2.0

Features

• [jest-runner] Move test summary to after coverage report (#4512)
• [jest-cli] Added --notifyMode to specify when to be notified. (#5125)
• [diff-sequences] New package compares items in two sequences to find a longest common subsequence. (#5407)
• [jest-matcher-utils] Add comment option to matcherHint function (#5437)
• [jest-config] Allow lastComit and changedFilesWithAncestor via JSON config (#5476)
• [jest-util] Add deletion to process.env as well (#5466)
• [jest-util] Add case-insensitive getters/setters to process.env (#5465)
• [jest-mock] Add util methods to create async functions. (#5318)

Fixes

• [jest-cli] Add trailing slash when checking root folder (#5464)
• [jest-cli] Hide interactive mode if there are no failed snapshot tests (#5450)
• [babel-jest] Remove retainLines from babel-jest (#5439)
• [jest-cli] Glob patterns ignore non-require-able files (e.g. README.md) (#5199)
• [jest-mock] Add backticks support (``) to mock a certain package via the __mocks__ folder. (#5426)
• [jest-message-util] Prevent an ENOENT crash when the test file contained a malformed source-map. (#5405).
• [jest] Add import-local to jest package. (#5353)
• [expect] Support class instances in .toHaveProperty() and .toMatchObject matcher. (#5367)
• [jest-cli] Fix npm update command for snapshot summary. (#5376, 5389)
• [expect] Make rejects and resolves synchronously validate its argument. (#5364)
• [docs] Add tutorial page for ES6 class mocks. (#5383)
• [jest-resolve] Search required modules in node_modules and then in custom paths. (#5403)
• [jest-resolve] Get builtin modules from node core. (#5411)
• [jest-resolve] Detect and preserve absolute paths in moduleDirectories. Do not generate additional (invalid) paths by prepending each ancestor of cwd to the absolute path. Additionally, this fixes functionality in Windows OS. (#5398)

Chore & Maintenance

• [jest-util] Implement watch plugins (#5399)

jest 20.0.0

• New --projects option to run one instance of Jest in multiple projects at the same time. (#3400)
• New multi project runner (#3156)
• New --listTests flag. (#3441)
• New --showConfig flag. (#3296)
• New promise support for all expect matchers through .resolves and .rejects. (#3068)
• New expect.hasAssertions() function similar to expect.assertions(). (#3379)
• New this.equals function exposed to custom matchers. (#3469)
• New valid-expect lint rule in eslint-plugin-jest. (#3067)
• New HtmlElement pretty-format plugin. (#3230)
• New Immutable pretty-format plugins. (#2899)
• New test environment per file setting through @jest-environment in the docblock. (#2859)
• New feature that allows every configuration option to be set from the command line. (#3424)
• New feature to add custom reporters to Jest through reporters in the configuration. (#3349)
• New feature to add expected and actual values to AssertionError. (#3217)
• New feature to map code coverage from transformers. (#2290)
• New feature to run untested code coverage in parallel. (#3407)
• New option to define a custom resolver. (#2998)
• New printing support for text and comment nodes in html pretty-format. (#3355)
• New snapshot testing FAQ (#3425)
• New support for custom platforms on jest-haste-map. (#3162)
• New support for mocking native async methods. (#3209)
• New guide on how to use Jest with any JavaScript framework. (#3243)
• New translation system for the Jest website.
• New collapsing watch mode usage prompt after first run. (#3078)
• Breaking Change: Forked Jasmine 2.5 into Jest's own test runner and rewrote large parts of Jasmine. (#3147)
• Breaking Change: Jest does not write new snapshots by default on CI. (#3456)
• Breaking Change: Moved the typescript parser from jest-editor-support into a separate jest-test-typescript-parser package. (#2973)
• Breaking Change: Replaced auto-loading of babel-polyfill with only regenerator-runtime, fixes a major memory leak. (#2755)
• Fixed babel-jest to look up the babel field in package.json as a fallback.
• Fixed jest-editor-support's parser to not crash on incomplete ASTs. (#3259)
• Fixed jest-resolve to use is-builtin-module instead of resolve.isCore. (#2997)
• Fixed jest-snapshot to normalize line endings in the serialize function. (#3002)
• Fixed behavior of --silent flag. (#3003)
• Fixed bug with watchers on macOS causing test to crash. (#2957)
• Fixed CLI notify option not taking precedence over config option. (#3340)
• Fixed detection of the npm client in SummaryReporter to support Yarn. (#3263)
• Fixed done.fail not passing arguments (#3241)
• Fixed fake timers to restore after resetting mocks. (#2467)
• Fixed handling of babylon's parser options in jest-editor-support. (#3344)
• Fixed Jest to properly cache transform results. (#3334)
• Fixed Jest to use human-readable colors for Jest's own snapshots. (#3119)
• Fixed jest-config to use UID for default cache folder. (#3380), (#3387)
• Fixed jest-runtime to expose inner error when it fails to write to the cache. (#3373)
• Fixed lifecycle hooks to make afterAll hooks operate the same as afterEach. (#3275)
• Fixed pretty-format to run plugins before serializing nested basic values. (#3017)
• Fixed return value of mocks so they can explicitly be set to return undefined. (#3354)
• Fixed runner to run tests associated with snapshots when the snapshot changes. (#3025)
• Fixed snapshot serializer require, restructured pretty-format. (#3399)
• Fixed support for Babel 7 in babel-jest. (#3271)
• Fixed testMatch to find tests in .folders. (#3006)
• Fixed testNamePattern and testPathPattern to work better together. (#3327)
• Fixed to show reject reason when expecting resolve. (#3134)
• Fixed toHaveProperty() to use hasOwnProperty from Object (#3410)
• Fixed watch mode's screen clearing. (#2959) (#3294)
• Improved and consolidated Jest's configuration file resolution. (#3472)
• Improved documentation throughout the Jest website.
• Improved documentation to explicitly mention that snapshots must be reviewed. (#3203)
• Improved documentation to make it clear CRA users don't need to add dependencies. (#3312)
• Improved eslint-plugin-jest's handling of expect. (#3306)
• Improved flow-coverage, eslint rules and test coverage within the Jest repository.
• Improved printing of expect.assertions error. (#3033)
• Improved Windows test coverage of Jest.
• Refactored configs & transform (#3376)
• Refactored reporters to pass individual Tests to reporters. (#3289)
• Refactored TestRunner (#3166)
• Refactored watch mode prompts. (#3290)
• Deleted jest-file-exists. (#3105)
• Removed Config type. (#3366)
• Removed all usage of jest-file-exists. (#3101)
• Adopted prettier on the Jest codebase.