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Jest v25.2.0 Release Notes

Release Date: 2020-03-25 // about 4 years ago

  • 🔋 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)