@jest/fake-timers - npm Package Versions

25.2.4

Features

• [jest-message-util] Check for common errors when using the wrong test environment (#8245)

Fixes

• [jest-circus] Fix type elision of jest-runtime imports (#9717)
• [@jest/transform] Fix coverage reporter for uncovered files without transformers, reverting #9460 (#9724)

25.2.3

Fixes

• [*] Verify all packages are properly downleveled for older versions of TypeScript (#9715)

25.2.1

Fixes

• [*] Downlevel TypeScript definitions files for compatibility with TS<3.8 (#9705)

25.2.0

Features

• [jest-config] Support ESM config files with .js extension (#9573).
• [jest-runtime] Override module.createRequire to return a Jest-compatible require function (#9469)
• [jest-haste-map] [BREAKING] Remove mapper option (#9581)
• [*] Support array of paths for moduleNameMapper aliases (#9465)
• [jest-reporters] Adds ability to pass options to the istanbul-reporter through coverageReporters (#9572)
• [jest-runtime] Require stack when a module cannot be resolved (#9681)
• [jest-transform] writeCacheFile no longer calls fsync (#9695)

Fixes

• [expect] Handle readonly properties correctly (#9575)
• [jest-cli] Set coverageProvider correctly when provided in config (#9562)
• [jest-cli] Allow specifying .cjs and .mjs config files by --config CLI option (#9578)
• [jest-cli] Update yargs to fix CLI flag overriding (#9519)
• [jest-config] Treat setupFilesAfterEnv like setupFiles when normalizing configs against presets (#9495)
• [jest-config] Support .mjs config files on Windows as well (#9558)
• [jest-config] Verify rootDir and all roots are directories (#9569)
• [jest-config] Ensure pattern of replacePosixSep is a string (#9546)
• [jest-haste-map] Fix crash on unix based systems without find (#9579)
• [jest-jasmine2] Fix --testNamePattern matching with concurrent tests (#9090)
• [jest-matcher-utils] Fix diff highlight of symbol-keyed object. (#9499)
• [@jest/reporters] Notifications should be fire&forget rather than having a timeout (#9567)
• [jest-resolve] Fix module identity preservation with symlinks and browser field resolution (#9511)
• [jest-resolve] Do not confuse directories with files (#8912)
• [jest-resolve] moduleNameMapper should take precedence over Node core modules (#9563)
• [jest-runtime] Reset isolateModules if it fails (#9541)
• [jest-runtime] Yarn PnP errors displayed to the user (#9681)
• [jest-snapshot] Downgrade semver to v6 to support node 8 (#9451)
• [jest-snapshot] Properly indent new snapshots in the presences of existing ones (#9523)
• [jest-transform] Correct sourcemap behavior for transformed and instrumented code (#9460)
• [jest-transform] Allow instrumentation of transformed files with weird file extensions (#9589)
• [@jest/types] Make ConfigGlobals an interface to allow for declaration merging. (#9570)
• [pretty-format] Export OldPlugin type (#9491)

Chore & Maintenance

• [docs] Warn about unexpected behavior / bug of node-notifier when using the notify options.
• [docs] Grammatical corrections to Async docs page. (#9679)
• [jest-resolver] Use resolve package to implement custom module resolution (#9520)
• [jest-runtime] Move execution of setupFiles to jest-runner (#9596)
• [jest-runtime] Update anchor link in helpers (#9616)
• [@jest/reporters] Remove unused dependencies and type exports (#9462)
• [website] Update pictures of reports when matchers fail (#9214)

Performance

• [jest-haste-map] Reduce number of lstat calls in node crawler (#9514)

25.1.0

Features

• [babel-plugin-jest-hoist] Show codeframe on static hoisting issues (#8865)
• [babel-plugin-jest-hoist] Add BigInt to ALLOWED_IDENTIFIERS (#8382)
• [babel-preset-jest] Add @babel/plugin-syntax-bigint (#8382)
• [expect] Add BigInt support to toBeGreaterThan, toBeGreaterThanOrEqual, toBeLessThan and toBeLessThanOrEqual (#8382)
• [expect, jest-matcher-utils] Display change counts in annotation lines (#9035)
• [expect, jest-snapshot] Support custom inline snapshot matchers (#9278)
• [jest-config] Throw the full error message and stack when a Jest preset is missing a dependency (#8924)
• [jest-config] [BREAKING] Set default display name color based on runner (#8689)
• [jest-config] Merge preset globals with project globals (#9027)
• [jest-config] Support .cjs config files (#9291)
• [jest-config] [BREAKING] Support .mjs config files (#9431)
• [jest-core] Support reporters as default exports (#9161)
• [jest-core] Support --findRelatedTests paths case insensitivity on Windows (#8961)
• [jest-diff] Add options for colors and symbols (#8841)
• [jest-diff] [BREAKING] Export as ECMAScript module (#8873)
• [jest-diff] Add includeChangeCounts and rename Indicator options (#8881)
• [jest-diff] Add changeColor and patchColor options (#8911)
• [jest-diff] Add trailingSpaceFormatter option and replace cyan with commonColor (#8927)
• [jest-diff] Add firstOrLastEmptyLineReplacement option and export 3 diffLines functions (#8955)
• [jest-environment] Add optional getVmContext next to runScript (#9252 & #9428)
• [jest-environment-jsdom] Add fakeTimersLolex (#8925)
• [jest-environment-node] Add fakeTimersLolex (#8925)
• [jest-environment-node] Add queueMicrotask (#9140)
• [jest-environment-node] Implement getVmContext (#9252 & #9428)
• [@jest/fake-timers] Add Lolex as implementation of fake timers (#8897)
• [jest-get-type] Add BigInt support. (#8382)
• [jest-matcher-utils] Add BigInt support to ensureNumbers ensureActualIsNumber, ensureExpectedIsNumber (#8382)
• [jest-matcher-utils] Ignore highlighting matched asymmetricMatcher in diffs (#9257)
• [jest-reporters] Export utils for path formatting (#9162)
• [jest-reporters] Provides global coverage thresholds as watermarks for istanbul (#9416)
• [jest-runner] Warn if a worker had to be force exited (#8206)
• [jest-runtime] [BREAKING] Do not export ScriptTransformer - it can be imported from @jest/transform instead (#9256)
• [jest-runtime] Use JestEnvironment.getVmContext and vm.compileFunction if available to avoid the module wrapper (#9252 & #9428)
• [jest-snapshot] Display change counts in annotation lines (#8982)
• [jest-snapshot] [BREAKING] Improve report when the matcher has properties (#9104)
• [jest-snapshot] Improve colors when snapshots are updatable (#9132)
• [jest-snapshot] Ignore indentation for most serialized objects (#9203)
• [jest-transform] Create createTranspilingRequire function for easy transpiling modules (#9194)
• [jest-transform] [BREAKING] Return transformed code as a string, do not wrap in vm.Script (#9253)
• [@jest/test-result] Create method to create empty TestResult (#8867)
• [jest-worker] [BREAKING] Return a promise from end(), resolving with the information whether workers exited gracefully (#8206)
• [jest-reporters] Transform file paths into hyperlinks (#8980)

Fixes

• [expect] Display expectedDiff more carefully in toBeCloseTo (#8389)
• [expect] Avoid incorrect difference for subset when toMatchObject fails (#9005)
• [expect] Consider all RegExp flags for equality (#9167)
• [expect] [BREAKING] Consider primitives different from wrappers instantiated with new (#9167)
• [expect] Prevent maintaining RegExp state between multiple tests (#9289)
• [expect] Fix subsetEquality false circular reference detection (#9322)
• [jest-config] Use half of the available cores when watchAll mode is enabled (#9117)
• [jest-config] Fix Jest multi project runner still cannot handle exactly one project (#8894)
• [jest-console] Add missing console.group calls to NullConsole (#9024)
• [jest-core] Don't include unref'd timers in --detectOpenHandles results (#8941)
• [jest-core] Limit number of workers when creating haste maps in projects (#9259)
• [jest-diff] Do not inverse format if line consists of one change (#8903)
• [jest-diff] Rename some new options and change their default values (#9077)
• [jest-environment-node] Fix TextEncoder.encode not referencing same global Uint8Array constructor (#9261)
• [jest-fake-timers] getTimerCount will not include cancelled immediates (#8764)
• [jest-fake-timers] Support util.promisify on setTimeout (#9180)
• [jest-jasmine2, jest-circus] Improve error message format for Node's assert.fail (#9262)
• [jest-leak-detector] [BREAKING] Use weak-napi instead of weak package (#8686)
• [jest-mock] Fix for mockReturnValue overriding mockImplementationOnce (#8398)
• [jest-reporters] Make node-notifier an optional dependency (#8918)
• [jest-reporters] Make all arguments to methods on BaseReporter optional (#9159)
• [jest-resolve]: Set MODULE_NOT_FOUND as error code when module is not resolved from paths (#8487)
• [jest-resolve-dependencies] Handle dynamic dependencies correctly even when using module maps (#9303)
• [jest-snapshot] Remove only the added newlines in multiline snapshots (#8859)
• [jest-snapshot] Distinguish empty string from external snapshot not written (#8880)
• [jest-snapshot] [BREAKING] Distinguish empty string from internal snapshot not written (#8898)
• [jest-snapshot] [BREAKING] Remove report method and throw matcher errors (#9049)
• [jest-snapshot] Omit irrelevant received properties when property matchers fail (#9198)
• [jest-transform] Properly cache transformed files across tests (#8890)
• [jest-transform] Don't fail the test suite when a generated source map is invalid (#9058)
• [jest-types] [BREAKING] Use less null | undefined in config types (#9200)
• [jest-util] Allow querying process.domain (#9136)
• [pretty-format] Correctly detect memoized elements (#9196)
• [pretty-format] Fix pretty-format to respect displayName on forwardRef (#9422)

Chore & Maintenance

• [*] [BREAKING] Drop support for Node 6 (#8455)
• [*] Add Node 12 to CI (#8411)
• [*] [BREAKING] Upgrade to Micromatch v4 (#8852)
• [babel-plugin-jest-hoist] [BREAKING] Use ESM exports (#8874)
• [docs] Add alias and optional boolean value to coverage CLI Reference (#8996)
• [docs] Fix broken link pointing to legacy JS file in "Snapshot Testing".
• [docs] Add setupFilesAfterEnv and jest.setTimeout example (#8971)
• [expect] Test that toStrictEqual is equivalent to Node's assert.deepStrictEqual (#9167)
• [jest] [BREAKING] Use ESM exports (#8874)
• [jest-cli] [BREAKING] Use ESM exports (#8874)
• [jest-cli] [BREAKING] Remove re-exports from @jest/core (#8874)
• [jest-diff] Remove the need to export splitLines0 function (#9151)
• [jest-environment-jsdom] [BREAKING] Upgrade JSDOM from v11 to v15 (#8851)
• [jest-haste-map] Upgrade to fsevents@2 (#9215)
• [jest-reporters] [BREAKING] Upgrade Istanbul dependencies, which are used for code coverage (#9192)
• [jest-util] [BREAKING] Remove deprecated exports (#8863)
• [jest-validate] [BREAKING] Use ESM exports (#8874)
• [jest-types] Mark InitialOptions as Partial (#8848)
• [jest-config] Refactor normalize to be more type safe (#8848)

24.9.0

Features

• [expect] Highlight substring differences when matcher fails, part 1 (#8448)
• [expect] Highlight substring differences when matcher fails, part 2 (#8528)
• [expect] Improve report when mock-spy matcher fails, part 1 (#8640)
• [expect] Improve report when mock-spy matcher fails, part 2 (#8649)
• [expect] Improve report when mock-spy matcher fails, part 3 (#8697)
• [expect] Improve report when mock-spy matcher fails, part 4 (#8710)
• [expect] Throw matcher error when received cannot be jasmine spy (#8747)
• [expect] Improve report when negative CalledWith assertion fails (#8755)
• [expect] Improve report when positive CalledWith assertion fails (#8771)
• [expect] Display equal values for ReturnedWith similar to CalledWith (#8791)
• [expect, jest-snapshot] Change color from green for some args in matcher hints (#8812)
• [jest-snapshot] Highlight substring differences when matcher fails, part 3 (#8569)
• [jest-core] Improve report when snapshots are obsolete (#8665)
• [jest-cli] Improve chai support (with detailed output, to match jest exceptions) (#8454)
• [*] Manage the global timeout with --testTimeout command line argument. (#8456)
• [pretty-format] Render custom displayName of memoized components (#8546)
• [jest-validate] Allow maxWorkers as part of the jest.config.js (#8565)
• [jest-runtime] Allow passing configuration objects to transformers (#7288)
• [@jest/core, @jest/test-sequencer] Support async sort in custom testSequencer (#8642)
• [jest-runtime, @jest/fake-timers] Add jest.advanceTimersToNextTimer (#8713)
• [@jest-transform] Extract transforming require logic within jest-core into @jest-transform (#8756)
• [jest-matcher-utils] Add color options to matcherHint (#8795)
• [jest-circus/jest-jasmine2] Give clearer output for Node assert errors (#8792)
• [jest-runner] Export all types in the type signature of jest-runner (#8825)

Fixes

• [jest-cli] Detect side-effect only imports when running --onlyChanged or --changedSince (#8670)
• [jest-cli] Allow --maxWorkers to work with % input again (#8565)
• [babel-plugin-jest-hoist] Expand list of whitelisted globals in global mocks (#8429)
• [jest-core] Make watch plugin initialization errors look nice (#8422)
• [jest-snapshot] Prevent inline snapshots from drifting when inline snapshots are updated (#8492)
• [jest-haste-map] Don't throw on missing mapper in Node crawler (#8558)
• [jest-core] Fix incorrect passWithNoTests warning (#8595)
• [jest-snapshots] Fix test retries that contain snapshots (#8629)
• [jest-mock] Fix incorrect assignments when restoring mocks in instances where they originally didn't exist (#8631)
• [expect] Fix stack overflow when matching objects with circular references (#8687)
• [jest-haste-map] Workaround a node >=12.5.0 bug that causes the process not to exit after tests have completed and cancerous memory growth (#8787)

Chore & Maintenance

• [docs] Replace FlowType with TypeScript in CONTRIBUTING.MD code conventions
• [jest-leak-detector] remove code repeat (#8438)
• [docs] Add example to jest.requireActual (#8482)
• [docs] Add example to jest.mock for mocking ES6 modules with the factory parameter (#8550)
• [docs] Add information about using jest.doMock with ES6 imports (#8573)
• [docs] Fix variable name in custom-matcher-api code example (#8582)
• [docs] Fix example used in custom environment docs (#8617)
• [docs] Updated react tutorial to refer to new package of react-testing-library (@testing-library/react) (#8753)
• [docs] Updated imports of react-testing-library to @testing-library/react in website (#8757)
• [jest-core] Add getVersion (moved from jest-cli) (#8706)
• [docs] Fix MockFunctions example that was using toContain instead of toContainEqual (#8765)
• [*] Make sure copyright header comment includes license (#8783)
• [*] Check copyright and license as one joined substring (#8815)
• [docs] Fix WatchPlugins jestHooks.shouldRunTestSuite example that receives an object (#8784)
• [*] Enforce LF line endings (#8809)
• [pretty-format] Delete obsolete link and simplify structure in README (#8824)
• [docs] Fix broken transform link on webpack page (#9155)

Performance

• [jest-watcher] Minor optimization for JestHook (#8746)
• [@jest/reporters] Prevent runaway CPU usage with --notify on macOS (#8831)