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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 typeahead to filter cached test names added to watch mode.
  • New typeahead to filter file names added to watch mode (#2324).
  • 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: jestjs#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
  • 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.