babel-jest

Features

• jest-cli: Add changedSince to allowed watch mode configs

• babel-jest: Add support for babel.config.js added in Babel 7.0.0

• jest-resolve: Add support for an experimental mapper option (Watchman crawler only) that adds virtual files to the Haste map

Fixes

• jest-resolve: Only resolve realpath once in try-catch

• expect: Fix TypeError in toBeInstanceOf on null or undefined

• jest-jasmine2: Throw a descriptive error if the first argument supplied to a hook was not a function (#6917) and

• jest-circus: Throw a descriptive error if the first argument supplied to a hook was not a function (#6917) and

• expect: Fix variadic custom asymmetric matchers

• jest-cli: Fix incorrect testEnvironmentOptions warning

• jest-each: Prevent done callback being supplied to describe

• jest-config: Better error message for a case when a preset module was found, but no jest-preset.js or jest-preset.json at the root

• jest-haste-map: Catch crawler error when unsuccessfully reading directories