## master

### Fixes

* `[jest-cli]` Fix `EISDIR` when a directory is passed as an argument to `jest`.
  ([#5317](https://github.com/facebook/jest/pull/5317))
* `[jest-config]` Added restoreMocks config option.
  ([#5327](https://github.com/facebook/jest/pull/5327))

## jest 22.1.0

### Features

* `[jest-cli]` Make Jest exit without an error when no tests are found in the
  case of `--lastCommit`, `--findRelatedTests`, or `--onlyChanged` options
  having been passed to the CLI

### Fixes
* `[jest-cli]` Use `import-local` to support global Jest installations.
  ([#5304](https://github.com/facebook/jest/pull/5304))
* `[jest-runner]` Fix memory leak in coverage reporting
  ([#5289](https://github.com/facebook/jest/pull/5289))
* `[docs]` Update mention of the minimal version of node supported [#4947](https://github.com/facebook/jest/issues/4947)
* `[jest-cli]` Fix missing newline in console message ([#5308](https://github.com/facebook/jest/pull/5308))
* `[jest-cli]` `--lastCommit` and `--changedFilesWithAncestor` now take effect
  even when `--onlyChanged` is not specified. ([#5307](https://github.com/facebook/jest/pull/5307))

### Chore & Maintenance

* `[filenames]` Standardize folder names under `integration-tests/`
  ([#5298](https://github.com/facebook/jest/pull/5298))

## jest 22.0.6

### Fixes

* `[jest-jasmine2]` Fix memory leak in snapshot reporting
  ([#5279](https://github.com/facebook/jest/pull/5279))
* `[jest-config]` Fix breaking change in `--testPathPattern`
  ([#5269](https://github.com/facebook/jest/pull/5269))

### Fixes

* `[docs]` Document caveat with mocks, Enzyme, snapshots and React 16
  ([#5258](https://github.com/facebook/jest/issues/5258))

## jest 22.0.5

### Fixes

* `[jest-leak-detector]` Removed the reference to `weak`. Now, parent projects
  must install it by hand for the module to work.
* `[expect]` Fail test when the types of `stringContaining` and `stringMatching`
  matchers do not match. ([#5069](https://github.com/facebook/jest/pull/5069))
* `[jest-cli]` Treat dumb terminals as noninteractive
  ([#5237](https://github.com/facebook/jest/pull/5237))
* `[jest-cli]` `jest --onlyChanged --changedFilesWithAncestor` now also works
  with git. ([#5189](https://github.com/facebook/jest/pull/5189))
* `[jest-config]` fix unexpected condition to avoid infinite recursion in
  Windows platform. ([#5161](https://github.com/facebook/jest/pull/5161))
* `[jest-config]` Escape parentheses and other glob characters in `rootDir`
  before interpolating with `testMatch`.
  ([#4838](https://github.com/facebook/jest/issues/4838))
* `[jest-regex-util]` Fix breaking change in `--testPathPattern`
  ([#5230](https://github.com/facebook/jest/pull/5230))
* `[expect]` Do not override `Error` stack (with `Error.captureStackTrace`) for
  custom matchers. ([#5162](https://github.com/facebook/jest/pull/5162))
* `[pretty-format]` Pretty format for DOMStringMap and NamedNodeMap
  ([#5233](https://github.com/facebook/jest/pull/5233))
* `[jest-cli]` Use a better console-clearing string on Windows
  ([#5251](https://github.com/facebook/jest/pull/5251))

### Features

* `[jest-jasmine]` Allowed classes and functions as `describe` names.
  ([#5154](https://github.com/facebook/jest/pull/5154))
* `[jest-jasmine2]` Support generator functions as specs.
  ([#5166](https://github.com/facebook/jest/pull/5166))
* `[jest-jasmine2]` Allow `spyOn` with getters and setters.
  ([#5107](https://github.com/facebook/jest/pull/5107))
* `[jest-config]` Allow configuration objects inside `projects` array
  ([#5176](https://github.com/facebook/jest/pull/5176))
* `[expect]` Add support to `.toHaveProperty` matcher to accept the keyPath
  argument as an array of properties/indices.
  ([#5220](https://github.com/facebook/jest/pull/5220))
* `[docs]` Add documentation for .toHaveProperty matcher to accept the keyPath
  argument as an array of properties/indices.
  ([#5220](https://github.com/facebook/jest/pull/5220))
* `[jest-runner]` test environments are now passed a new `options` parameter.
  Currently this only has the `console` which is the test console that Jest will
  expose to tests. ([#5223](https://github.com/facebook/jest/issues/5223))
* `[jest-environment-jsdom]` pass the `options.console` to a custom instance of
  `virtualConsole` so jsdom is using the same console as the test.
  ([#5223](https://github.com/facebook/jest/issues/5223))

### Chore & Maintenance

* `[docs]` Describe the order of execution of describe and test blocks.
  ([#5217](https://github.com/facebook/jest/pull/5217),
  [#5238](https://github.com/facebook/jest/pull/5238))
* `[docs]` Add a note on `moduleNameMapper` ordering.
  ([#5249](https://github.com/facebook/jest/pull/5249))

## jest 22.0.4

### Fixes

* `[jest-cli]` New line before quitting watch mode.
  ([#5158](https://github.com/facebook/jest/pull/5158))

### Features

* `[babel-jest]` moduleFileExtensions not passed to babel transformer.
  ([#5110](https://github.com/facebook/jest/pull/5110))

### Chore & Maintenance

* `[*]` Tweaks to better support Node 4
  ([#5142](https://github.com/facebook/jest/pull/5142))

## jest 22.0.2 && 22.0.3

### Chore & Maintenance

* `[*]` Tweaks to better support Node 4
  ([#5134](https://github.com/facebook/jest/pull/5134))

## jest 22.0.1

### Fixes

* `[jest-runtime]` fix error for test files providing coverage.
  ([#5117](https://github.com/facebook/jest/pull/5117))

### Features

* `[jest-config]` Add `forceCoverageMatch` to allow collecting coverage from
  ignored files. ([#5081](https://github.com/facebook/jest/pull/5081))

## jest 22.0.0

### Fixes

* `[jest-resolve]` Use `module.builtinModules` as `BUILTIN_MODULES` when it
  exists
* `[jest-worker]` Remove `debug` and `inspect` flags from the arguments sent to
  the child ([#5068](https://github.com/facebook/jest/pull/5068))
* `[jest-config]` Use all `--testPathPattern` and `<regexForTestFiles>` args in
  `testPathPattern` ([#5066](https://github.com/facebook/jest/pull/5066))
* `[jest-cli]` Do not support `--watch` inside non-version-controlled
  environments ([#5060](https://github.com/facebook/jest/pull/5060))
* `[jest-config]` Escape Windows path separator in testPathPattern CLI arguments
  ([#5054](https://github.com/facebook/jest/pull/5054)
* `[jest-jasmine]` Register sourcemaps as node environment to improve
  performance with jsdom ([#5045](https://github.com/facebook/jest/pull/5045))
* `[pretty-format]` Do not call toJSON recursively
  ([#5044](https://github.com/facebook/jest/pull/5044))
* `[pretty-format]` Fix errors when identity-obj-proxy mocks CSS Modules
  ([#4935](https://github.com/facebook/jest/pull/4935))
* `[babel-jest]` Fix support for namespaced babel version 7
  ([#4918](https://github.com/facebook/jest/pull/4918))
* `[expect]` fix .toThrow for promises
  ([#4884](https://github.com/facebook/jest/pull/4884))
* `[jest-docblock]` pragmas should preserve urls
  ([#4837](https://github.com/facebook/jest/pull/4629))
* `[jest-cli]` Check if `npm_lifecycle_script` calls Jest directly
  ([#4629](https://github.com/facebook/jest/pull/4629))
* `[jest-cli]` Fix --showConfig to show all configs
  ([#4494](https://github.com/facebook/jest/pull/4494))
* `[jest-cli]` Throw if `maxWorkers` doesn't have a value
  ([#4591](https://github.com/facebook/jest/pull/4591))
* `[jest-cli]` Use `fs.realpathSync.native` if available
  ([#5031](https://github.com/facebook/jest/pull/5031))
* `[jest-config]` Fix `--passWithNoTests`
  ([#4639](https://github.com/facebook/jest/pull/4639))
* `[jest-config]` Support `rootDir` tag in testEnvironment
  ([#4579](https://github.com/facebook/jest/pull/4579))
* `[jest-editor-support]` Fix `--showConfig` to support jest 20 and jest 21
  ([#4575](https://github.com/facebook/jest/pull/4575))
* `[jest-editor-support]` Fix editor support test for node 4
  ([#4640](https://github.com/facebook/jest/pull/4640))
* `[jest-mock]` Support mocking constructor in `mockImplementationOnce`
  ([#4599](https://github.com/facebook/jest/pull/4599))
* `[jest-runtime]` Fix manual user mocks not working with custom resolver
  ([#4489](https://github.com/facebook/jest/pull/4489))
* `[jest-util]` Fix `runOnlyPendingTimers` for `setTimeout` inside
  `setImmediate` ([#4608](https://github.com/facebook/jest/pull/4608))
* `[jest-message-util]` Always remove node internals from stacktraces
  ([#4695](https://github.com/facebook/jest/pull/4695))
* `[jest-resolve]` changes method of determining builtin modules to include
  missing builtins ([#4740](https://github.com/facebook/jest/pull/4740))
* `[pretty-format]` Prevent error in pretty-format for window in jsdom test env
  ([#4750](https://github.com/facebook/jest/pull/4750))
* `[jest-resolve]` Preserve module identity for symlinks
  ([#4761](https://github.com/facebook/jest/pull/4761))
* `[jest-config]` Include error message for `preset` json
  ([#4766](https://github.com/facebook/jest/pull/4766))
* `[pretty-format]` Throw `PrettyFormatPluginError` if a plugin halts with an
  exception ([#4787](https://github.com/facebook/jest/pull/4787))
* `[expect]` Keep the stack trace unchanged when `PrettyFormatPluginError` is
  thrown by pretty-format ([#4787](https://github.com/facebook/jest/pull/4787))
* `[jest-environment-jsdom]` Fix asynchronous test will fail due to timeout
  issue. ([#4669](https://github.com/facebook/jest/pull/4669))
* `[jest-cli]` Fix `--onlyChanged` path case sensitivity on Windows platform
  ([#4730](https://github.com/facebook/jest/pull/4730))
* `[jest-runtime]` Use realpath to match transformers
  ([#5000](https://github.com/facebook/jest/pull/5000))
* `[expect]` [**BREAKING**] Replace identity equality with Object.is in toBe
  matcher ([#4917](https://github.com/facebook/jest/pull/4917))

### Features

* `[jest-message-util]` Add codeframe to test assertion failures
  ([#5087](https://github.com/facebook/jest/pull/5087))
* `[jest-config]` Add Global Setup/Teardown options
  ([#4716](https://github.com/facebook/jest/pull/4716))
* `[jest-config]` Add `testEnvironmentOptions` to apply to jsdom options or node
  context. ([#5003](https://github.com/facebook/jest/pull/5003))
* `[jest-jasmine2]` Update Timeout error message to `jest.timeout` and display
  current timeout value ([#4990](https://github.com/facebook/jest/pull/4990))
* `[jest-runner]` Enable experimental detection of leaked contexts
  ([#4895](https://github.com/facebook/jest/pull/4895))
* `[jest-cli]` Add combined coverage threshold for directories.
  ([#4885](https://github.com/facebook/jest/pull/4885))
* `[jest-mock]` Add `timestamps` to mock state.
  ([#4866](https://github.com/facebook/jest/pull/4866))
* `[eslint-plugin-jest]` Add `prefer-to-have-length` lint rule.
  ([#4771](https://github.com/facebook/jest/pull/4771))
* `[jest-environment-jsdom]` [**BREAKING**] Upgrade to JSDOM@11
  ([#4770](https://github.com/facebook/jest/pull/4770))
* `[jest-environment-*]` [**BREAKING**] Add Async Test Environment APIs, dispose
  is now teardown ([#4506](https://github.com/facebook/jest/pull/4506))
* `[jest-cli]` Add an option to clear the cache
  ([#4430](https://github.com/facebook/jest/pull/4430))
* `[babel-plugin-jest-hoist]` Improve error message, that the second argument of
  `jest.mock` must be an inline function
  ([#4593](https://github.com/facebook/jest/pull/4593))
* `[jest-snapshot]` [**BREAKING**] Concatenate name of test and snapshot
  ([#4460](https://github.com/facebook/jest/pull/4460))
* `[jest-cli]` [**BREAKING**] Fail if no tests are found
  ([#3672](https://github.com/facebook/jest/pull/3672))
* `[jest-diff]` Highlight only last of odd length leading spaces
  ([#4558](https://github.com/facebook/jest/pull/4558))
* `[jest-docblock]` Add `docblock.print()`
  ([#4517](https://github.com/facebook/jest/pull/4517))
* `[jest-docblock]` Add `strip`
  ([#4571](https://github.com/facebook/jest/pull/4571))
* `[jest-docblock]` Preserve leading whitespace in docblock comments
  ([#4576](https://github.com/facebook/jest/pull/4576))
* `[jest-docblock]` remove leading newlines from `parswWithComments().comments`
  ([#4610](https://github.com/facebook/jest/pull/4610))
* `[jest-editor-support]` Add Snapshots metadata
  ([#4570](https://github.com/facebook/jest/pull/4570))
* `[jest-editor-support]` Adds an 'any' to the typedef for
  `updateFileWithJestStatus`
  ([#4636](https://github.com/facebook/jest/pull/4636))
* `[jest-editor-support]` Better monorepo support
  ([#4572](https://github.com/facebook/jest/pull/4572))
* `[jest-environment-jsdom]` Add simple rAF polyfill in jsdom environment to
  work with React 16 ([#4568](https://github.com/facebook/jest/pull/4568))
* `[jest-environment-node]` Implement node Timer api
  ([#4622](https://github.com/facebook/jest/pull/4622))
* `[jest-jasmine2]` Add testPath to reporter callbacks
  ([#4594](https://github.com/facebook/jest/pull/4594))
* `[jest-mock]` Added support for naming mocked functions with
  `.mockName(value)` and `.mockGetName()`
  ([#4586](https://github.com/facebook/jest/pull/4586))
* `[jest-runtime]` Add `module.loaded`, and make `module.require` not enumerable
  ([#4623](https://github.com/facebook/jest/pull/4623))
* `[jest-runtime]` Add `module.parent`
  ([#4614](https://github.com/facebook/jest/pull/4614))
* `[jest-runtime]` Support sourcemaps in transformers
  ([#3458](https://github.com/facebook/jest/pull/3458))
* `[jest-snapshot]` [**BREAKING**] Add a serializer for `jest.fn` to allow a
  snapshot of a jest mock ([#4668](https://github.com/facebook/jest/pull/4668))
* `[jest-worker]` Initial version of parallel worker abstraction, say hello!
  ([#4497](https://github.com/facebook/jest/pull/4497))
* `[jest-jasmine2]` Add `testLocationInResults` flag to add location information
  per spec to test results ([#4782](https://github.com/facebook/jest/pull/4782))
* `[jest-environment-jsdom]` Update JSOM to 11.4, which includes built-in
  support for `requestAnimationFrame`
  ([#4919](https://github.com/facebook/jest/pull/4919))
* `[jest-cli]` Hide watch usage output when running on non-interactive
  environments ([#4958](https://github.com/facebook/jest/pull/4958))
* `[jest-snapshot]` Promises support for `toThrowErrorMatchingSnapshot`
  ([#4946](https://github.com/facebook/jest/pull/4946))
* `[jest-cli]` Explain which snapshots are obsolete
  ([#5005](https://github.com/facebook/jest/pull/5005))

### Chore & Maintenance

* `[docs]` Add guide of using with puppeteer
  ([#5093](https://github.com/facebook/jest/pull/5093))
* `[jest-util]` `jest-util` should not depend on `jest-mock`
  ([#4992](https://github.com/facebook/jest/pull/4992))
* `[*]` [**BREAKING**] Drop support for Node.js version 4
  ([#4769](https://github.com/facebook/jest/pull/4769))
* `[docs]` Wrap code comments at 80 characters
  ([#4781](https://github.com/facebook/jest/pull/4781))
* `[eslint-plugin-jest]` Removed from the Jest core repo, and moved to
  https://github.com/jest-community/eslint-plugin-jest
  ([#4867](https://github.com/facebook/jest/pull/4867))
* `[babel-jest]` Explicitly bump istanbul to newer versions
  ([#4616](https://github.com/facebook/jest/pull/4616))
* `[expect]` Upgrade mocha and rollup for browser testing
  ([#4642](https://github.com/facebook/jest/pull/4642))
* `[docs]` Add info about `coveragePathIgnorePatterns`
  ([#4602](https://github.com/facebook/jest/pull/4602))
* `[docs]` Add Vuejs series of testing with Jest
  ([#4648](https://github.com/facebook/jest/pull/4648))
* `[docs]` Mention about optional `done` argument in test function
  ([#4556](https://github.com/facebook/jest/pull/4556))
* `[jest-cli]` Bump node-notifier version
  ([#4609](https://github.com/facebook/jest/pull/4609))
* `[jest-diff]` Simplify highlight for leading and trailing spaces
  ([#4553](https://github.com/facebook/jest/pull/4553))
* `[jest-get-type]` Add support for date
  ([#4621](https://github.com/facebook/jest/pull/4621))
* `[jest-matcher-utils]` Call `chalk.inverse` for trailing spaces
  ([#4578](https://github.com/facebook/jest/pull/4578))
* `[jest-runtime]` Add `.advanceTimersByTime`; keep `.runTimersToTime()` as an
  alias.
* `[docs]` Include missing dependency in TestEnvironment sample code
* `[docs]` Add clarification for hook execution order
* `[docs]` Update `expect.anything()` sample code
  ([#5007](https://github.com/facebook/jest/pull/5007))

## jest 21.2.1

* Fix watchAll not running tests on save
  ([#4550](https://github.com/facebook/jest/pull/4550))
* Add missing escape sequences to ConvertAnsi plugin
  ([#4544](https://github.com/facebook/jest/pull/4544))

## jest 21.2.0

* 🃏 Change license from BSD+Patents to MIT.
* Allow eslint-plugin to recognize more disabled tests
  ([#4533](https://github.com/facebook/jest/pull/4533))
* Add babel-plugin for object spread syntax to babel-preset-jest
  ([#4519](https://github.com/facebook/jest/pull/4519))
* Display outer element and trailing newline consistently in jest-diff
  ([#4520](https://github.com/facebook/jest/pull/4520))
* Do not modify stack trace of JestAssertionError
  ([#4516](https://github.com/facebook/jest/pull/4516))
* Print errors after test structure in verbose mode
  ([#4504](https://github.com/facebook/jest/pull/4504))
* Fix `--silent --verbose` problem
  ([#4505](https://github.com/facebook/jest/pull/4505))
* Fix: Reset local state of assertions when using hasAssertions
  ([#4498](https://github.com/facebook/jest/pull/4498))
* jest-resolve: Prevent default resolver failure when potential resolution
  directory does not exist ([#4483](https://github.com/facebook/jest/pull/4483))

## jest 21.1.0

* (minor) Use ES module exports
  ([#4454](https://github.com/facebook/jest/pull/4454))
* Allow chaining mockClear and mockReset
  ([#4475](https://github.com/facebook/jest/pull/4475))
* Call jest-diff and pretty-format more precisely in toHaveProperty matcher
  ([#4445](https://github.com/facebook/jest/pull/4445))
* Expose restoreAllMocks to object
  ([#4463](https://github.com/facebook/jest/pull/4463))
* Fix function name cleaning when making mock fn
  ([#4464](https://github.com/facebook/jest/pull/4464))
* Fix Map/Set equality checker
  ([#4404](https://github.com/facebook/jest/pull/4404))
* Make FUNCTION_NAME_RESERVED_PATTERN stateless
  ([#4466](https://github.com/facebook/jest/pull/4466))

## jest 21.0.2

* Take precedence of NODE_PATH when resolving node_modules directories
  ([#4453](https://github.com/facebook/jest/pull/4453))
* Fix race condition with --coverage and babel-jest identical file contents edge
  case ([#4432](https://github.com/facebook/jest/pull/4432))
* Add extra parameter `--runTestsByPath`.
  ([#4411](https://github.com/facebook/jest/pull/4411))
* Upgrade all outdated deps
  ([#4425](https://github.com/facebook/jest/pull/4425))

## jest 21.0.1

* Remove obsolete error ([#4417](https://github.com/facebook/jest/pull/4417))

## jest 21.0.0

* Add --changedFilesWithAncestor
  ([#4070](https://github.com/facebook/jest/pull/4070))
* Add --findRelatedFiles ([#4131](https://github.com/facebook/jest/pull/4131))
* Add --onlyChanged tests ([#3977](https://github.com/facebook/jest/pull/3977))
* Add `contextLines` option to jest-diff
  ([#4152](https://github.com/facebook/jest/pull/4152))
* Add alternative serialize API for pretty-format plugins
  ([#4114](https://github.com/facebook/jest/pull/4114))
* Add displayName to MPR ([#4327](https://github.com/facebook/jest/pull/4327))
* Add displayName to TestResult
  ([#4408](https://github.com/facebook/jest/pull/4408))
* Add es5 build of pretty-format
  ([#4075](https://github.com/facebook/jest/pull/4075))
* Add extra info to no tests for changed files message
  ([#4188](https://github.com/facebook/jest/pull/4188))
* Add fake chalk in browser builds in order to support IE10
  ([#4367](https://github.com/facebook/jest/pull/4367))
* Add jest.requireActual ([#4260](https://github.com/facebook/jest/pull/4260))
* Add maxWorkers to globalConfig
  ([#4005](https://github.com/facebook/jest/pull/4005))
* Add skipped tests support for jest-editor-support
  ([#4346](https://github.com/facebook/jest/pull/4346))
* Add source map support for better debugging experience
  ([#3738](https://github.com/facebook/jest/pull/3738))
* Add support for Error objects in toMatchObject
  ([#4339](https://github.com/facebook/jest/pull/4339))
* Add support for Immutable.Record in pretty-format
  ([#3678](https://github.com/facebook/jest/pull/3678))
* Add tests for extract_requires on export types
  ([#4080](https://github.com/facebook/jest/pull/4080))
* Add that toMatchObject can match arrays
  ([#3994](https://github.com/facebook/jest/pull/3994))
* Add watchPathIgnorePatterns to exclude paths to trigger test re-run in watch
  mode ([#4331](https://github.com/facebook/jest/pull/4331))
* Adding ancestorTitles property to JSON test output
  ([#4293](https://github.com/facebook/jest/pull/4293))
* Allow custom resolver to be used with[out] moduleNameMapper
  ([#4174](https://github.com/facebook/jest/pull/4174))
* Avoid parsing `.require(…)` method calls
  ([#3777](https://github.com/facebook/jest/pull/3777))
* Avoid unnecessary function declarations and call in pretty-format
  ([#3962](https://github.com/facebook/jest/pull/3962))
* Avoid writing to stdout in default reporter if --json is enabled. Fixes #3941
  ([#3945](https://github.com/facebook/jest/pull/3945))
* Better error handling for --config
  ([#4230](https://github.com/facebook/jest/pull/4230))
* Call consistent pretty-format plugins within Jest
  ([#3800](https://github.com/facebook/jest/pull/3800))
* Change babel-core to peerDependency for compatibility with Babel 7
  ([#4162](https://github.com/facebook/jest/pull/4162))
* Change Promise detection code in jest-circus to support non-global Promise
  implementations ([#4375](https://github.com/facebook/jest/pull/4375))
* Changed files eager loading
  ([#3979](https://github.com/facebook/jest/pull/3979))
* Check whether we should output to stdout or stderr
  ([#3953](https://github.com/facebook/jest/pull/3953))
* Clarify what objects toContain and toContainEqual can be used on
  ([#4307](https://github.com/facebook/jest/pull/4307))
* Clean up resolve() logic. Provide useful names for variables and functions.
  Test that a directory exists before attempting to resolve files within it.
  ([#4325](https://github.com/facebook/jest/pull/4325))
* cleanupStackTrace ([#3696](https://github.com/facebook/jest/pull/3696))
* compare objects with Symbol keys
  ([#3437](https://github.com/facebook/jest/pull/3437))
* Complain if expect is passed multiple arguments
  ([#4237](https://github.com/facebook/jest/pull/4237))
* Completes nodeCrawl with empty roots
  ([#3776](https://github.com/facebook/jest/pull/3776))
* Consistent naming of files
  ([#3798](https://github.com/facebook/jest/pull/3798))
* Convert code base to ESM import
  ([#3778](https://github.com/facebook/jest/pull/3778))
* Correct summary message for flag --findRelatedTests.
  ([#4309](https://github.com/facebook/jest/pull/4309))
* Coverage thresholds can be set up for individual files
  ([#4185](https://github.com/facebook/jest/pull/4185))
* custom reporter error handling
  ([#4051](https://github.com/facebook/jest/pull/4051))
* Define separate type for pretty-format plugin Options
  ([#3802](https://github.com/facebook/jest/pull/3802))
* Delete confusing async keyword
  ([#3679](https://github.com/facebook/jest/pull/3679))
* Delete redundant branch in ReactElement and HTMLElement plugins
  ([#3731](https://github.com/facebook/jest/pull/3731))
* Don't format node assert errors when there's no 'assert' module
  ([#4376](https://github.com/facebook/jest/pull/4376))
* Don't print test summary in --silent
  ([#4106](https://github.com/facebook/jest/pull/4106))
* Don't try to build ghost packages
  ([#3934](https://github.com/facebook/jest/pull/3934))
* Escape double quotes in attribute values in HTMLElement plugin
  ([#3797](https://github.com/facebook/jest/pull/3797))
* Explain how to clear the cache
  ([#4232](https://github.com/facebook/jest/pull/4232))
* Factor out common code for collections in pretty-format
  ([#4184](https://github.com/facebook/jest/pull/4184))
* Factor out common code for markup in React plugins
  ([#4171](https://github.com/facebook/jest/pull/4171))
* Feature/internal resolve ([#4315](https://github.com/facebook/jest/pull/4315))
* Fix --logHeapUsage ([#4176](https://github.com/facebook/jest/pull/4176))
* Fix --showConfig to show all project configs
  ([#4078](https://github.com/facebook/jest/pull/4078))
* Fix --watchAll ([#4254](https://github.com/facebook/jest/pull/4254))
* Fix bug when setTimeout is mocked
  ([#3769](https://github.com/facebook/jest/pull/3769))
* Fix changedFilesWithAncestor
  ([#4193](https://github.com/facebook/jest/pull/4193))
* Fix colors for expected/stored snapshot message
  ([#3702](https://github.com/facebook/jest/pull/3702))
* Fix concurrent test failure
  ([#4159](https://github.com/facebook/jest/pull/4159))
* Fix for 4286: Compare Maps and Sets by value rather than order
  ([#4303](https://github.com/facebook/jest/pull/4303))
* fix forceExit ([#4105](https://github.com/facebook/jest/pull/4105))
* Fix grammar in React Native docs
  ([#3838](https://github.com/facebook/jest/pull/3838))
* Fix inconsistent name of complex values in pretty-format
  ([#4001](https://github.com/facebook/jest/pull/4001))
* Fix issue mocking bound method
  ([#3805](https://github.com/facebook/jest/pull/3805))
* Fix jest-circus ([#4290](https://github.com/facebook/jest/pull/4290))
* Fix lint warning in master
  ([#4132](https://github.com/facebook/jest/pull/4132))
* Fix linting ([#3946](https://github.com/facebook/jest/pull/3946))
* fix merge conflict ([#4144](https://github.com/facebook/jest/pull/4144))
* Fix minor typo ([#3729](https://github.com/facebook/jest/pull/3729))
* fix missing console.log messages
  ([#3895](https://github.com/facebook/jest/pull/3895))
* fix mock return value ([#3933](https://github.com/facebook/jest/pull/3933))
* Fix mocking for modules with folders on windows
  ([#4238](https://github.com/facebook/jest/pull/4238))
* Fix NODE_PATH resolving for relative paths
  ([#3616](https://github.com/facebook/jest/pull/3616))
* Fix options.moduleNameMapper override order with preset
  ([#3565](https://github.com/facebook/jest/pull/3565)
  ([#3689](https://github.com/facebook/jest/pull/3689))
* Fix React PropTypes warning in tests for Immutable plugin
  ([#4412](https://github.com/facebook/jest/pull/4412))
* Fix regression in mockReturnValueOnce
  ([#3857](https://github.com/facebook/jest/pull/3857))
* Fix sample code of mock class constructors
  ([#4115](https://github.com/facebook/jest/pull/4115))
* Fix setup-test-framework-test
  ([#3773](https://github.com/facebook/jest/pull/3773))
* fix typescript jest test crash
  ([#4363](https://github.com/facebook/jest/pull/4363))
* Fix watch mode ([#4084](https://github.com/facebook/jest/pull/4084))
* Fix Watchman on windows ([#4018](https://github.com/facebook/jest/pull/4018))
* Fix(babel): Handle ignored files in babel v7
  ([#4393](https://github.com/facebook/jest/pull/4393))
* Fix(babel): Support upcoming beta
  ([#4403](https://github.com/facebook/jest/pull/4403))
* Fixed object matcher ([#3799](https://github.com/facebook/jest/pull/3799))
* Fixes #3820 use extractExpectedAssertionsErrors in jasmine setup
* Flow upgrade ([#4355](https://github.com/facebook/jest/pull/4355))
* Force message in matchers to always be a function
  ([#3972](https://github.com/facebook/jest/pull/3972))
* Format `describe` and use `test` instead of `it` alias
  ([#3792](https://github.com/facebook/jest/pull/3792))
* global_config.js for multi-project runner
  ([#4023](https://github.com/facebook/jest/pull/4023))
* Handle async errors ([#4016](https://github.com/facebook/jest/pull/4016))
* Hard-fail if hasteImpl is throwing an error during initialization.
  ([#3812](https://github.com/facebook/jest/pull/3812))
* Ignore import type for extract_requires
  ([#4079](https://github.com/facebook/jest/pull/4079))
* Ignore indentation of data structures in jest-diff
  ([#3429](https://github.com/facebook/jest/pull/3429))
* Implement 'jest.requireMock'
  ([#4292](https://github.com/facebook/jest/pull/4292))
* Improve Jest phabricator plugin
  ([#4195](https://github.com/facebook/jest/pull/4195))
* Improve Seq and remove newline from non-min empty in Immutable plugin
  ([#4241](https://github.com/facebook/jest/pull/4241))
* Improved the jest reporter with snapshot info per test.
  ([#3660](https://github.com/facebook/jest/pull/3660))
* Include fullName in formattedAssertion
  ([#4273](https://github.com/facebook/jest/pull/4273))
* Integrated with Yarn workspaces
  ([#3906](https://github.com/facebook/jest/pull/3906))
* jest --all ([#4020](https://github.com/facebook/jest/pull/4020))
* jest-circus test failures
  ([#3770](https://github.com/facebook/jest/pull/3770))
* jest-circus Timeouts ([#3760](https://github.com/facebook/jest/pull/3760))
* jest-haste-map: add test case for broken handling of ignore pattern
  ([#4047](https://github.com/facebook/jest/pull/4047))
* jest-haste-map: add test+fix for broken platform module support
  ([#3885](https://github.com/facebook/jest/pull/3885))
* jest-haste-map: deprecate functional ignorePattern and use it in cache key
  ([#4063](https://github.com/facebook/jest/pull/4063))
* jest-haste-map: mock 'fs' with more idiomatic jest.mock()
  ([#4046](https://github.com/facebook/jest/pull/4046))
* jest-haste-map: only file IO errors should be silently ignored
  ([#3816](https://github.com/facebook/jest/pull/3816))
* jest-haste-map: throw when trying to get a duplicated module
  ([#3976](https://github.com/facebook/jest/pull/3976))
* jest-haste-map: watchman crawler: normalize paths
  ([#3887](https://github.com/facebook/jest/pull/3887))
* jest-runtime: atomic cache write, and check validity of data
  ([#4088](https://github.com/facebook/jest/pull/4088))
* Join lines with newline in jest-diff
  ([#4314](https://github.com/facebook/jest/pull/4314))
* Keep ARGV only in CLI files
  ([#4012](https://github.com/facebook/jest/pull/4012))
* let transformers adjust cache key based on mapCoverage
  ([#4187](https://github.com/facebook/jest/pull/4187))
* Lift requires ([#3780](https://github.com/facebook/jest/pull/3780))
* Log stack when reporting errors in jest-runtime
  ([#3833](https://github.com/facebook/jest/pull/3833))
* Make --listTests return a new line separated list when not using --json
  ([#4229](https://github.com/facebook/jest/pull/4229))
* Make build script printing small-terminals-friendly
  ([#3892](https://github.com/facebook/jest/pull/3892))
* Make error messages more explicit for toBeCalledWith assertions
  ([#3913](https://github.com/facebook/jest/pull/3913))
* Make jest-matcher-utils use ESM exports
  ([#4342](https://github.com/facebook/jest/pull/4342))
* Make jest-runner a standalone package.
  ([#4236](https://github.com/facebook/jest/pull/4236))
* Make Jest’s Test Runner configurable.
  ([#4240](https://github.com/facebook/jest/pull/4240))
* Make listTests always print to console.log
  ([#4391](https://github.com/facebook/jest/pull/4391))
* Make providesModuleNodeModules ignore nested node_modules directories
* Make sure function mocks match original arity
  ([#4170](https://github.com/facebook/jest/pull/4170))
* Make sure runAllTimers also clears all ticks
  ([#3915](https://github.com/facebook/jest/pull/3915))
* Make toBe matcher error message more helpful for objects and arrays
  ([#4277](https://github.com/facebook/jest/pull/4277))
* Make useRealTimers play well with timers: fake
  ([#3858](https://github.com/facebook/jest/pull/3858))
* Move getType from jest-matcher-utils to separate package
  ([#3559](https://github.com/facebook/jest/pull/3559))
* Multiroot jest-change-files
  ([#3969](https://github.com/facebook/jest/pull/3969))
* Output created snapshot when using --ci option
  ([#3693](https://github.com/facebook/jest/pull/3693))
* Point out you can use matchers in .toMatchObject
  ([#3796](https://github.com/facebook/jest/pull/3796))
* Prevent babelrc package import failure on relative current path
  ([#3723](https://github.com/facebook/jest/pull/3723))
* Print RDP details for windows builds
  ([#4017](https://github.com/facebook/jest/pull/4017))
* Provide better error checking for transformed content
  ([#3807](https://github.com/facebook/jest/pull/3807))
* Provide printText and printComment in markup.js for HTMLElement plugin
  ([#4344](https://github.com/facebook/jest/pull/4344))
* Provide regex visualization for testRegex
  ([#3758](https://github.com/facebook/jest/pull/3758))
* Refactor CLI ([#3862](https://github.com/facebook/jest/pull/3862))
* Refactor names and delimiters of complex values in pretty-format
  ([#3986](https://github.com/facebook/jest/pull/3986))
* Replace concat(Immutable) with Immutable as item of plugins array
  ([#4207](https://github.com/facebook/jest/pull/4207))
* Replace Jasmine with jest-circus
  ([#3668](https://github.com/facebook/jest/pull/3668))
* Replace match with test and omit redundant String conversion
  ([#4311](https://github.com/facebook/jest/pull/4311))
* Replace print with serialize in AsymmetricMatcher plugin
  ([#4173](https://github.com/facebook/jest/pull/4173))
* Replace print with serialize in ConvertAnsi plugin
  ([#4225](https://github.com/facebook/jest/pull/4225))
* Replace print with serialize in HTMLElement plugin
  ([#4215](https://github.com/facebook/jest/pull/4215))
* Replace print with serialize in Immutable plugins
  ([#4189](https://github.com/facebook/jest/pull/4189))
* Replace unchanging args with one config arg within pretty-format
  ([#4076](https://github.com/facebook/jest/pull/4076))
* Return UNDEFINED for undefined type in ReactElement plugin
  ([#4360](https://github.com/facebook/jest/pull/4360))
* Rewrite some read bumps in pretty-format
  ([#4093](https://github.com/facebook/jest/pull/4093))
* Run update method before installing JRE on Circle
  ([#4318](https://github.com/facebook/jest/pull/4318))
* Separated the snapshot summary creation from the printing to improve
  testability. ([#4373](https://github.com/facebook/jest/pull/4373))
* Set coverageDirectory during normalize phase
  ([#3966](https://github.com/facebook/jest/pull/3966))
* Setup custom reporters after default reporters
  ([#4053](https://github.com/facebook/jest/pull/4053))
* Setup for Circle 2 ([#4149](https://github.com/facebook/jest/pull/4149))
* Simplify readme ([#3790](https://github.com/facebook/jest/pull/3790))
* Simplify snapshots definition
  ([#3791](https://github.com/facebook/jest/pull/3791))
* skipNodeResolution config option
  ([#3987](https://github.com/facebook/jest/pull/3987))
* Small fixes to toHaveProperty docs
  ([#3878](https://github.com/facebook/jest/pull/3878))
* Sort attributes by name in HTMLElement plugin
  ([#3783](https://github.com/facebook/jest/pull/3783))
* Specify watchPathIgnorePatterns will only be available in Jest 21+
  ([#4398](https://github.com/facebook/jest/pull/4398))
* Split TestRunner off of TestScheduler
  ([#4233](https://github.com/facebook/jest/pull/4233))
* Strict and explicit config resolution logic
  ([#4122](https://github.com/facebook/jest/pull/4122))
* Support maxDepth option in React plugins
  ([#4208](https://github.com/facebook/jest/pull/4208))
* Support SVG elements in HTMLElement plugin
  ([#4335](https://github.com/facebook/jest/pull/4335))
* Test empty Immutable collections with {min: false} option
  ([#4121](https://github.com/facebook/jest/pull/4121))
* test to debug travis failure in master
  ([#4145](https://github.com/facebook/jest/pull/4145))
* testPathPattern message test
  ([#4006](https://github.com/facebook/jest/pull/4006))
* Throw Error When Using Nested It Specs
  ([#4039](https://github.com/facebook/jest/pull/4039))
* Throw when moduleNameMapper points to inexistent module
  ([#3567](https://github.com/facebook/jest/pull/3567))
* Unified 'no tests found' message for non-verbose MPR
  ([#4354](https://github.com/facebook/jest/pull/4354))
* Update migration guide with jest-codemods transformers
  ([#4306](https://github.com/facebook/jest/pull/4306))
* Use "inputSourceMap" for coverage re-mapping.
  ([#4009](https://github.com/facebook/jest/pull/4009))
* Use "verbose" no test found message when there is only one project
  ([#4378](https://github.com/facebook/jest/pull/4378))
* Use babel transform to inline all requires
  ([#4340](https://github.com/facebook/jest/pull/4340))
* Use eslint plugins to run prettier
  ([#3971](https://github.com/facebook/jest/pull/3971))
* Use iterableEquality in spy matchers
  ([#3651](https://github.com/facebook/jest/pull/3651))
* Use modern HTML5 <!DOCTYPE>
  ([#3937](https://github.com/facebook/jest/pull/3937))
* Wrap `Error.captureStackTrace` in a try
  ([#4035](https://github.com/facebook/jest/pull/4035))

## jest 20.0.4

* Fix jest-haste-map's handling of duplicate module IDs.
  ([#3647](https://github.com/facebook/jest/pull/3647))
* Fix behavior of `enableAutomock()` when automock is set to false.
  ([#3624](https://github.com/facebook/jest/pull/3624))
* Fix progress bar in windows.
  ([#3626](https://github.com/facebook/jest/pull/3626))

## jest 20.0.3

* Fix reporters 'default' setting.
  ([#3562](https://github.com/facebook/jest/pull/3562))
* Fix to make Jest fail when the coverage threshold not met.
  ([#3554](https://github.com/facebook/jest/pull/3554))

## jest 20.0.1

* Add ansi-regex to pretty-format dependencies
  ([#3498](https://github.com/facebook/jest/pull/3498))
* Fix <rootDir> replacement in testMatch and moduleDirectories
  ([#3538](https://github.com/facebook/jest/pull/3538))
* Fix expect.hasAssertions() to throw when passed arguments
  ([#3526](https://github.com/facebook/jest/pull/3526))
* Fix stack traces without proper error messages
  ([#3513](https://github.com/facebook/jest/pull/3513))
* Fix support for custom extensions through haste packages
  ([#3537](https://github.com/facebook/jest/pull/3537))
* Fix test contexts between test functions
  ([#3506](https://github.com/facebook/jest/pull/3506))

## jest 20.0.0

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

## jest 19.0.1

* Fix infinite loop when using `--watch` with `--coverage`.
* Fixed `watchman` config option.
* Fixed a bug in the jest-editor-support static analysis.
* Fixed eslint plugin warning.
* Fixed missing space in front of "Did you mean …?".
* Fixed path printing in the reporter on Windows.

## jest 19.0.0

* Breaking Change: Added a version for snapshots.
* Breaking Change: Removed the `mocksPattern` configuration option, it never
  worked correctly.
* Breaking Change: Renamed `testPathDirs` to `roots` to avoid confusion when
  configuring Jest.
* Breaking Change: Updated printing of React elements to cause fewer changes
  when props change.
* Breaking Change: Updated snapshot format to properly escape data.
* Fixed --color to be recognized correctly again.
* Fixed `babel-plugin-jest-hoist` to work properly with type annotations in
  tests.
* Fixed behavior for console.log calls and fixed a memory leak (#2539).
* Fixed cache directory path for Jest to avoid ENAMETOOLONG errors.
* Fixed change events to be emitted in jest-haste-map's watch mode. This fixes
  issues with Jest's new watch mode and react-native-packager.
* Fixed cli arguments to be used when loading the config from file, they were
  previously ignored.
* Fixed Jest to load json files that include a BOM.
* Fixed Jest to throw errors instead of ignoring invalid cli options.
* Fixed mocking behavior for virtual modules.
* Fixed mocking behavior with transitive dependencies.
* Fixed support for asymmetric matchers in `toMatchObject`.
* Fixed test interruption and `--bail` behavior.
* Fixed watch mode to clean up worker processes when a test run gets
  interrupted.
* Fixed whitespace to be highlighted in snapshots and assertion errors.
* Improved `babel-jest` plugin: babel is loaded lazily, istanbul comments are
  only added when coverage is used.
* Improved error for invalid transform config.
* Improved moduleNameMapper to not overwrite mocks when many patterns map to the
  same file.
* Improved printing of skipped tests in verbose mode.
* Improved resolution code in jest-resolve.
* Improved to only show patch marks in assertion errors when the comparison
  results in large objects.
* New `--collectCoverageFrom` cli argument.
* New `--coverageDirectory` cli argument.
* New `expect.addSnapshotSerializer` to add custom snapshot serializers for
  tests.
* New `jest.spyOn`.
* New `testMatch` configuration option that accepts glob patterns.
* New eslint-plugin-jest with no-disabled-tests, no-focuses-tests and
  no-identical-title rules and default configuration and globals.
* New expect.stringContaining asymmetric matcher.
* New feature to make manual mocks with nested folders work. For example
  `__mocks__/react-native/Library/Text.js` will now work as expected.
* New feature to re-run tests through the notification when using `--notify`.
* New jest-phabricator package to integrate Jest code coverage in phabriactor.
* New jest-validate package to improve configuration errors, help with
  suggestions of correct configuration and to be adopted in other libraries.
* New pretty-printing for asymmetric matchers.
* New RSS feed for Jest's blog.
* New way to provide a reducer to extract haste module ids.
* New website, new documentation, new color scheme and new homepage.
* Rewritten watch mode for instant feedback, better code quality and to build
  new features on top of it (#2362).

## jest 18.1.0

* Fixed console.log and fake timer behavior in node 7.3.
* Updated istanbul-api.
* Updated jest-diff equality error message.
* Disabled arrow keys when entering a pattern in watch mode to prevent broken
  behavior. Will be improved in a future release.
* Moved asymmetric matchers and equality functionality from Jasmine into
  jest-matchers.
* Removed jasmine and jest-snapshot dependency from jest-matchers.
* Removed unused global `context` variable.
* Show a better error message if the config is invalid JSON.
* Highlight trailing whitespace in assertion diffs and snapshots.
* Jest now uses micromatch instead of minimatch.
* Added `-h` as alias for `--help`.

## jest 18.0.0

See https://facebook.github.io/jest/blog/2016/12/15/2016-in-jest.html

* The testResultsProcessor function is now required to return the modified
  results.
* Removed `pit` and `mockImpl`. Use `it` or `mockImplementation` instead.
* Fixed re-running tests when `--bail` is used together with `--watch`.
* `pretty-format` is now merged into Jest.
* `require('v8')` now works properly in a test context.
* Jest now clears the entire scrollback in watch mode.
* Added `expect.any`, `expect.anything`, `expect.objectContaining`,
  `expect.arrayContaining`, `expect.stringMatching`.
* Properly resolve `snapshotSerializers`, `setupFiles`, `transform`,
  `testRunner` and `testResultsProcessor` instead of using `path.resolve`.
* `--testResultsProcessor` is now exposed through the cli.
* Renamed `--jsonOutputFile` to `--outputFile`.
* Added `jest-editor-support` for vscode and Nuclide integration.
* Fixed `test.concurrent` unhandled promise rejections.
* The Jest website is now auto-deployed when merging into master.
* Updated `testRegex` to include `test.js` and `spec.js` files.
* Fixes for `babel-plugin-jest-hoist` when using `jest.mock` with three
  arguments.
* The `JSON` global in `jest-environment-node` now comes from the vm context
  instead of the parent context.
* Jest does not print stack traces from babel any longer.
* Fake timers are reset when `FakeTimers.useTimers()` is called.
* Usage of Jest in watch mode can be hidden through `JEST_HIDE_USAGE`.
* Added `expect.assertions(number)` which will ensure that a specified amount of
  assertions is made in one test.
* Added `.toMatchSnapshot(?string)` feature to give snapshots a name.
* Escape regex in snapshots.
* `jest-react-native` was deprecated and now forwards `react-native`.
* Added `.toMatchObject` matcher.
* Further improve printing of large objects.
* Fixed `NaN% Failed` in the OS notification when using `--notify`.
* The first test run without cached timings will now use separate processes
  instead of running in band.
* Added `.toHaveProperty` matcher.
* Fixed `Map`/`Set` comparisons.
* `test.concurrent` now works with `--testNamePattern`.

## jest 17.0.3

* Improved file-watching feature in jest-haste-map.
* Added `.toHaveLength` matcher.
* Improved `.toContain` matcher.

## jest 17.0.2

* Fixed performance regression in module resolution.

## jest 17.0.1

* Fixed pretty printing of big objects.
* Fixed resolution of `.native.js` files in react-native projects.

## jest 17.0.0

* Added `expect.extend`.
* Properly resolve modules with platform extensions on react-native.
* Added support for custom snapshots serializers.
* Updated to Jasmine 2.5.2.
* Big diffs are now collapsed by default in snapshots and assertions. Added
  `--expand` (or `-e`) to show the full diff.
* Replaced `scriptPreprocessor` with the new `transform` option.
* Added `jest.resetAllMocks` which replaces `jest.clearAllMocks`.
* Fixes for react-native preset.
* Fixes for global built in objects in `jest-environment-node`.
* Create mock objects in the vm context instead of the parent context.
* `.babelrc` is now part of the transform cache key in `babel-jest`.
* Fixes for docblock parsing with haste modules.
* Exit with the proper code when the coverage threshold is not reached.
* Implemented file watching in `jest-haste-map`.
* `--json` now includes information about individual tests inside a file.

## jest 16.0.2

* Symbols are now properly mocked when using `jest-mock`.
* `toHaveBeenCalledWith()` works without arguments again.
* Newlines in snapshots are now normalized across different operating systems.

## jest 16.0.1

* Fix infinite loop.

## jest 16.0.0

* Previously failed tests are now always run first.
* A new concurrent reporter shows currently running tests, a test summary, a
  progress bar and estimated remaining time if possible.
* Improved CLI colors.
* `jest <pattern>` is now case-insensitive.
* Added `it.only`, `it.skip`, `test.only`, `test.skip` and `xtest`.
* Added `--testNamePattern=pattern` or `-t <pattern>` to run individual tests in
  test files.
* Jest now warns for duplicate mock files.
* Pressing `a`, `o`, `p`, `q` or `enter` while tests are running in the watch
  mode, the test run will be interrupted.
* `--bail` now works together with `--watch`.
* Added `test.concurrent` for concurrent async tests.
* Jest now automatically considers files and tests with the `.jsx` extension.
* Added `jest.clearAllMocks` to clear all mocks manually.
* Rewrote Jest's snapshot implementation. `jest-snapshot` can now be more easily
  integrated into other test runners and used in other projects.
* This requires most snapshots to be updated when upgrading Jest.
* Objects and Arrays in snapshots are now printed with a trailing comma.
* Function names are not printed in snapshots any longer to reduce issues with
  code coverage instrumentation and different Node versions.
* Snapshots are now sorted using natural sort order.
* Snapshots are not marked as obsolete any longer when using `fit` or when an
  error is thrown in a test.
* Finished migration of Jasmine matchers to the new Jest matchers.
* Pretty print `toHaveBeenLastCalledWith`, `toHaveBeenCalledWith`,
  `lastCalledWith` and `toBeCalledWith` failure messages.
* Added `toBeInstanceOf` matcher.
* Added `toContainEqual` matcher.
* Added `toThrowErrorMatchingSnapshot` matcher.
* Improved `moduleNameMapper` resolution.
* Module registry fixes.
* Fixed invocation of the `setupTestFrameworkScriptFile` script to make it
  easier to use chai together with Jest.
* Removed react-native special case in Jest's configuration.
* Added `--findRelatedTests <fileA> <fileB>` cli option to run tests related to
  the specified files.
* Added `jest.deepUnmock` to `babel-plugin-jest-hoist`.
* Added `jest.runTimersToTime` which is useful together with fake timers.
* Improved automated mocks for ES modules compiled with babel.

## jest 15.1.1

* Fixed issues with test paths that include hyphens on Windows.
* Fixed `testEnvironment` resolution.
* Updated watch file name pattern input.

## jest 15.1.0

* Pretty printer updates for React and global window objects.
* `jest-runtime` overwrites automocking from configuration files.
* Improvements for watch mode on Windows.
* afterAll/afterEach/beforeAll/beforeEach can now return a Promise and be used
  together with async/await.
* Improved stack trace printing on Node 4.

## jest 15.0.2

* Fixed Jest with npm2 when using coverage.

## jest 15.0.1

* Updated toThrow and toThrowMatchers and aliased them to the same matcher.
* Improvements for watch mode.
* Fixed Symbol reassignment in tests would break Jest's matchers.
* Fixed `--bail` option.

## jest 15.0.0

* See https://facebook.github.io/jest/blog/2016/09/01/jest-15.html
* Jest by default now also recognizes files ending in `.spec.js` and `.test.js`
  as test files.
* Completely replaced most Jasmine matchers with new Jest matchers.
* Rewrote Jest's CLI output for test failures and summaries.
* Added `--env` option to override the default test environment.
* Disabled automocking, fake timers and resetting the module registry by
  default.
* Added `--watchAll`, made `--watch` interactive and added the ability to update
  snapshots and select test patterns in watch mode.
* Jest uses verbose mode when running a single test file.
* Console messages are now buffered and printed along with the test results.
* Fix `testEnvironment` resolution to prefer `jest-environment-{name}` instead
  of `{name}` only. This prevents a module colision when using `jsdom` as test
  environment.
* `moduleNameMapper` now uses a resolution algorithm.
* Improved performance for small test runs.
* Improved API documentation.
* Jest now works properly with directories that have special characters in them.
* Improvements to Jest's own test infra by merging integration and unit tests.
  Code coverage is now collected for Jest.
* Added `global.global` to the node environment.
* Fixed babel-jest-plugin-hoist issues with functions called `mock`.
* Improved jest-react-native preset with mocks for ListView, TextInput,
  ActivityIndicator and ScrollView.
* Added `collectCoverageFrom` to collect code coverage from untested files.
* Rewritten code coverage support.

## jest 14.1.0

* Changed Jest's default cache directory.
* Fixed `jest-react-native` for react 15.3.0.
* Updated react and react-native example to use `react-test-renderer`.
* Started to refactor code coverage.

## jest 14.0.2

* `babel-jest` bugfix.

## jest 14.0.1

* `babel-jest` can now be used to compose a transformer.
* Updated snapshot instructions to run `jest -u` or `npm test -- -u`.
* Fixed `config` cli option to enable JSON objects as configuration.
* Updated printing of preset path in the CLI.

## jest 14.0.0

* Official release of snapshot tests.
* Started to replace Jasmine matchers with Jest matchers: `toBe`, `toBeFalsy`,
  `toBeTruthy`, `toBeNaN`, `toBe{Greater,Less}Than{,OrEqual}`, `toBeNull`,
  `toBeDefined`, `toBeUndefined`, `toContain`, `toMatch`, `toBeCloseTo` were
  rewritten.
* Rewrite of Jest's reporters.
* Experimental react-native support.
* Removed Jasmine 1 support from Jest.
* Transform caching improvements.

## jest 13.2.0

* Snapshot bugfixes.
* Timer bugfixes.

## jest 13.1.0

* Added `test` global function as an alias for `it`.
* Added `coveragePathIgnorePatterns` to the config.
* Fixed printing of "JSX objects" in snapshots.
* Fixes for `--verbose` option and top level `it` calls.
* Extended the node environment with more globals.
* testcheck now needs to be required explicitly through `require('jest-check')`.
* Added `jest.deepUnmock`.
* Fail test suite if it does not contain any tests.

## jest 13.0.0

* Added duration of individual tests in verbose mode.
* Added a `browser` config option to properly resolve npm packages with a
  browser field in `package.json` if you are writing tests for client side apps
* Added `jest-repl`.
* Split up `jest-cli` into `jest-runtime` and `jest-config`.
* Added a notification plugin that shows a test run notification using
  `--notify`.
* Refactored `TestRunner` into `SearchSource` and improved the "no tests found"
  message.
* Added `jest.isMockFunction(jest.fn())` to test for mock functions.
* Improved test reporter printing and added a test failure summary when running
  many tests.
  * Add support for property testing via testcheck-js.
* Added a webpack tutorial.
* Added support for virtual mocks through
  `jest.mock('Module', implementation, {virtual: true})`.
* Added snapshot functionality through `toMatchSnapshot()`.
* Redesigned website.

## jest-cli 12.1.1

* Windows stability fixes.
* Mock module resolution fixes.
* Remove test files from code coverage.

## jest-cli 12.1.0

* Jest is now also published in the `jest` package on npm.
* Added `testRegex` to match for tests outside of specific folders. Deprecated
  both `testDirectoryName` and `testFileExtensions`.
* `it` can now return a Promise for async testing. `pit` was deprecated.
* Added `jest-resolve` as a standalone package based on the Facebook module
  resolution algorithm.
* Added `jest-changed-files` as a standalone package to detect changed files in
  a git or hg repo.
* Added `--setupTestFrameworkFile` to cli.
* Added support for coverage thresholds. See
  http://facebook.github.io/jest/docs/api.html#coveragethreshold-object.
* Updated to jsdom 9.0.
* Updated and improved stack trace reporting.
* Added `module.filename` and removed the invalid `module.__filename` field.
* Further improved the `lastCalledWith` and `toBeCalledWith` custom matchers.
  They now print the most recent calls.
* Fixed jest-haste-map on continuous integration systems.
* Fixes for hg/git integration.
* Added a re-try for the watchman crawler.

## jest-cli 12.0.2

* Bug fixes when running a single test file and for scoped package names.

## jest-cli 12.0.1

* Added custom equality matchers for Map/Set and iterables.
* Bug fixes

## jest-cli 12.0.0

* Reimplemented `node-haste` as `jest-haste-map`:
  https://github.com/facebook/jest/pull/896
* Fixes for the upcoming release of nodejs 6.
* Removed global mock caching which caused negative side-effects on test runs.
* Updated Jasmine from 2.3.4 to 2.4.1.
* Fixed our Jasmine fork to work better with `Object.create(null)`.
* Added a `--silent` flag to silence console messages during a test run.
* Run a test file directly if a path is passed as an argument to Jest.
* Added support for the undocumented nodejs feature `module.paths`.

## jest-cli 11.0.2

* Fixed `jest -o` error when Mercurial isn't installed on the system
* Fixed Jasmine failure message when expected values were mutated after tests.

## jest-cli 11.0.1, babel-jest 11.0.1

* Added support for Mercurial repositories when using `jest -o`
* Added `mockImplementationOnce` API to `jest.fn()`.

## jest-cli 11.0.0, babel-jest 11.0.0 (pre-releases 0.9 to 0.10)

* New implementation of node-haste and rewrite of internal module loading and
  resolution. Fixed both startup and runtime performance.
  [#599](https://github.com/facebook/jest/pull/599)
* Jasmine 2 is now the default test runner. To keep using Jasmine 1, put
  `testRunner: "jasmine1"` into your configuration.
* Added `jest-util`, `jest-mock`, `jest-jasmine1`, `jest-jasmine2`,
  `jest-environment-node`, `jest-environment-jsdom` packages.
* Added `babel-jest-preset` and `babel-jest` as packages. `babel-jest` is now
  being auto-detected.
* Added `babel-plugin-jest-hoist` which hoists `jest.unmock`, `jest.mock` and
  the new `jest.enableAutomock` and `jest.disableAutomock` API.
* Improved `babel-jest` integration and `react-native` testing.
* Improved code coverage reporting when using `babel-jest`.
* Added the `jest.mock('moduleName', moduleFactory)` feature. `jest.mock` now
  gets hoisted by default. `jest.doMock` was added to explicitly mock a module
  without the hoisting feature of `babel-jest`.
* Updated jsdom to 8.3.x.
* Improved responsiveness of the system while using `--watch`.
* Clear the terminal window when using `--watch`.
* By default, `--watch` will now only runs tests related to changed files.
  `--watch=all` can be used to run all tests on file system changes.
* Debounce `--watch` re-runs to not trigger test runs during a branch switch in
  version control.
* Added `jest.fn()` and `jest.fn(implementation)` as convenient shorcuts for
  `jest.genMockFunction()` and `jest.genMockFunction().mockImplementation()`.
* Added an `automock` option to turn off automocking globally.
* Added a "no tests found" message if no tests can be found.
* Jest sets `process.NODE_ENV` to `test` unless otherwise specified.
* Fixed `moduleNameMapper` config option when used with paths.
* Fixed an error with Jasmine 2 and tests that `throw 'string errors'`.
* Fixed issues with unmocking symlinked module names.
* Fixed mocking of boolean values.
* Fixed mocking of fields that start with an underscore ("private fields").
* Fixed unmocking behavior with npm3.
* Fixed and improved `--onlyChanged` option.
* Fixed support for running Jest as a git submodule.
* Improved verbose logger output
* Fixed test runtime error reporting and stack traces.
* Improved `toBeCalled` Jasmine 2 custom matcher messages.
* Improved error reporting when a syntax error occurs.
* Renamed HasteModuleLoader to Runtime.
* Jest now properly reports pending tests disabled with `xit` and `xdescribe`.
* Removed `preprocessCachingDisabled` config option.
* Added a `testEnvironment` option to customize the sandbox environment.
* Added support for `@scoped/name` npm packages.
* Added an integration test runner for Jest that runs all tests for examples and
  packages.

## 0.8.2

* Performance improvements.
* jest now uses `chalk` instead of its own colors implementation.

## 0.8.1

* `--bail` now reports with the proper error code.
* Fixed loading of the setup file when using jasmine2.
* Updated jsdom to 7.2.0.

## 0.8.0

* Added optional support for jasmine2 through the `testRunner` config option.
* Fixed mocking support for Map, WeakMap and Set.
* `node` was added to the defaults in `moduleFileExtensions`.
* Updated the list of node core modules that are properly being recognized by
  the module loader.

## 0.7.1

* Correctly map `process.on` into jsdom environments, fixes a bug introduced in
  jest 0.7.0.

## 0.7.0

* Fixed a memory leak with test contexts. Jest now properly cleans up test
  environments after each test. Added `--logHeapUsage` to log memory usage after
  each test. Note: this is option is meant for debugging memory leaks and might
  significantly slow down your test run.
* Removed `mock-modules`, `node-haste` and `mocks` virtual modules. This is a
  breaking change of undocumented public API. Usage of this API can safely be
  automatically updated through an automated codemod:
* Example: http://astexplorer.net/#/zrybZ6UvRA
* Codemod:
  https://github.com/cpojer/js-codemod/blob/master/transforms/jest-update.js
* jscodeshift: https://github.com/facebook/jscodeshift
* Removed `navigator.onLine` and `mockSetReadOnlyProperty` from the global jsdom
  environment. Use `window.navigator.onLine = true;` in your test setup and
  `Object.defineProperty` instead.

## 0.6.1

* Updated jsdom to 7.0.2.
* Use the current working directory as root when passing a jest config from the
  command line.
* Updated the React examples and getting started guide
* Modules now receive a `module.parent` field so unmocked modules don't assume
  they are run directly any longer.

## 0.6.0

* jest now reports the number of tests that were run instead of the number of
  test files.
* Added a `--json` option to print test results as JSON.
* Changed the preprocessor API. A preprocessor now receives the script, file and
  config. The cache key function receives the script, file and stringified
  config to be able to create consistent hashes.
* Removed node-worker-pool in favor of node-worker-farm (#540).
* `toEqual` now also checks the internal class name of an object. This fixes
  invalid tests like `expect([]).toEqual({})` which were previously passing.
* Added the option to provide map modules to stub modules by providing the
  `moduleNameMapper` config option.
* Allow to specify a custom `testRunner` in the configuration (#531).
* Added a `--no-cache` option to make it easier to debug preprocessor scripts.
* Fix code coverage on windows (#499).

## 0.5.6

* Cache test run performance and run slowest tests first to maximize worker
  utilization
* Update to jsdom 6.5.0

## 0.5.5

* Improve failure stack traces.
* Fix syntax error reporting.
* Add `--watch` option (#472).

## 0.5.2

* Fixed a bug with syntax errors in test files (#487).
* Fixed chmod error for preprocess-cache (#491).
* Support for the upcoming node 4.0 release (#490, #489).

## 0.5.1

* Upgraded node-worker-pool to 3.0.0, use the native `Promise` implementation.
* `testURL` can be used to set the location of the jsdom environment.
* Updated all of jest's dependencies, now using jsdom 6.3.
* jest now uses the native `Promise` implementation.
* Fixed a bug when passed an empty `testPathIgnorePatterns`.
* Moved preprocessor cache into the haste cache directory.

## 0.5.0

* Added `--noStackTrace` option to disable stack traces.
* Jest now only works with iojs v2 and up. If you are still using node we
  recommend upgrading to iojs or keep using jest 0.4.0.
* Upgraded to jsdom 6.1.0 and removed all the custom jsdom overwrites.

## <=0.4.0

* See commit history for changes in previous versions of jest.