babel-jest

We skipped 24.2.0 because a draft was accidentally published. Please use 24.3.0 or a newer version instead.

Features

• : Improve report when matcher fails, part 10

• : Improve report when matcher fails, part 11

• : Improve report when matcher fails, part 12

• : Improve report when matcher fails, part 7

• : Improve report when matcher fails, part 8

• : Improve report when matcher fails, part 9

• jest-circus/jest-jasmine2: Warn if describe returns a value

• jest-config: Print error information on preset normalization error

• jest-get-type: Add isPrimitive function

• jest-haste-map: Add skipPackageJson option

• jest-util: Add isPromise

• pretty-format: Support React.memo

Fixes

• expect: Fix toStrictEqual not considering arrays with objects having undefined values correctly

• expect: Fix custom async matcher stack trace

• expect: Fix non-object received value in toHaveProperty (#7986, #8067)

• expect: Fix non-symmetric equal for Number

• removed

  expect: Remove duck typing and obsolete browser support code when comparing DOM nodes and use DOM-Level-3 API instead

• jest-changed-files: Fix getChangedFilesFromRoots to not return parts of the commit messages as if they were files, when the commit messages contained multiple paragraphs

• jest-changed-files: Fix pattern for HG changed files

• jest-changed-files: Improve default file selection for Mercurial repos

• jest-circus: Fix bug with test.only

• : Throw explicit error when errors happen after test is considered complete

• security

  jest-cli: Fix prototype pollution vulnerability in dependency

• jest-cli: Refactor -o and --coverage combined

• jest-environment-node: Add missing globals: TextEncoder and TextDecoder

• jest-haste-map: Enforce uniqueness in names (mocks and haste ids)

• : Throw explicit error when errors happen after test is considered complete

• jest-mock: Adds a type check to prototype to allow mocks of objects with a primitive prototype property.

• jest-transform: Normalize config and remove unnecessary checks, convert TestUtils.js to TypeScript

• Make sure to not fail if unable to assign toStringTag to the process object, which is read only in Node 12

• jest-validate: Fix validating async functions

• jest-worker: Fix jest-worker when using pre-allocated jobs

• static: Remove console log '-' on the front page

Performance

• jest-haste-map: Optimize haste map tracking of deleted files with Watchman.