@jest/core

Features

• babel-plugin-jest-hoist: Show codeframe on static hoisting issues

• babel-plugin-jest-hoist: Add BigInt to ALLOWED_IDENTIFIERS

• babel-preset-jest: Add @babel/plugin-syntax-bigint

• expect: Add BigInt support to toBeGreaterThan, toBeGreaterThanOrEqual, toBeLessThan and toBeLessThanOrEqual

• expect, jest-matcher-utils: Display change counts in annotation lines

• expect, jest-snapshot: Support custom inline snapshot matchers

• jest-config: Throw the full error message and stack when a Jest preset is missing a dependency

• breaking

  jest-config: Set default display name color based on runner

• jest-config: Merge preset globals with project globals

• jest-config: Support .cjs config files

• breaking

  jest-config: Support .mjs config files

• jest-core: Support reporters as default exports

• jest-core: Support --findRelatedTests paths case insensitivity on Windows

• jest-diff: Add options for colors and symbols

• breaking

  jest-diff: Export as ECMAScript module

• jest-diff: Add includeChangeCounts and rename Indicator options

• jest-diff: Add changeColor and patchColor options

• jest-diff: Add trailingSpaceFormatter option and replace cyan with commonColor

• jest-diff: Add firstOrLastEmptyLineReplacement option and export 3 diffLines functions

• jest-environment: Add optional getVmContext next to runScript (#9252 & #9428)

• jest-environment-jsdom: Add fakeTimersLolex

• jest-environment-node: Add fakeTimersLolex

• jest-environment-node: Add queueMicrotask

• jest-environment-node: Implement getVmContext (#9252 & #9428)

• @jest/fake-timers: Add Lolex as implementation of fake timers

• jest-get-type: Add BigInt support.

• jest-matcher-utils: Add BigInt support to ensureNumbers ensureActualIsNumber, ensureExpectedIsNumber

• jest-matcher-utils: Ignore highlighting matched asymmetricMatcher in diffs

• jest-reporters: Export utils for path formatting

• jest-reporters: Provides global coverage thresholds as watermarks for istanbul

• jest-runner: Warn if a worker had to be force exited

• breaking

  jest-runtime: Do not export ScriptTransformer - it can be imported from @jest/transform instead

• 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

• breaking

  jest-snapshot: Improve report when the matcher has properties

• jest-snapshot: Improve colors when snapshots are updatable

• jest-snapshot: Ignore indentation for most serialized objects

• jest-transform: Create createTranspilingRequire function for easy transpiling modules

• breaking

  jest-transform: Return transformed code as a string, do not wrap in vm.Script

• @jest/test-result: Create method to create empty TestResult

• breaking

  jest-worker: Return a promise from end(), resolving with the information whether workers exited gracefully

• jest-reporters: Transform file paths into hyperlinks

Fixes

• expect: Display expectedDiff more carefully in toBeCloseTo

• expect: Avoid incorrect difference for subset when toMatchObject fails

• expect: Consider all RegExp flags for equality

• breaking

  expect: Consider primitives different from wrappers instantiated with new

• expect: Prevent maintaining RegExp state between multiple tests

• expect: Fix subsetEquality false circular reference detection

• jest-config: Use half of the available cores when watchAll mode is enabled

• jest-config: Fix Jest multi project runner still cannot handle exactly one project

• jest-console: Add missing console.group calls to NullConsole

• jest-core: Don't include unref'd timers in --detectOpenHandles results

• jest-core: Limit number of workers when creating haste maps in projects

• jest-diff: Do not inverse format if line consists of one change

• jest-diff: Rename some new options and change their default values

• jest-environment-node: Fix TextEncoder.encode not referencing same global Uint8Array constructor

• jest-fake-timers: getTimerCount will not include cancelled immediates

• jest-fake-timers: Support util.promisify on setTimeout

• jest-jasmine2, jest-circus: Improve error message format for Node's assert.fail

• breaking

  jest-leak-detector: Use weak-napi instead of weak package

• jest-mock: Fix for mockReturnValue overriding mockImplementationOnce

• jest-reporters: Make node-notifier an optional dependency

• jest-reporters: Make all arguments to methods on BaseReporter optional

• : Set MODULE_NOT_FOUND as error code when module is not resolved from paths

• jest-resolve-dependencies: Handle dynamic dependencies correctly even when using module maps

• jest-snapshot: Remove only the added newlines in multiline snapshots

• jest-snapshot: Distinguish empty string from external snapshot not written

• breaking

  jest-snapshot: Distinguish empty string from internal snapshot not written

• breaking

  jest-snapshot: Remove report method and throw matcher errors

• jest-snapshot: Omit irrelevant received properties when property matchers fail

• jest-transform: Properly cache transformed files across tests

• jest-transform: Don't fail the test suite when a generated source map is invalid

• breaking

  jest-types: Use less null | undefined in config types

• jest-util: Allow querying process.domain

• pretty-format: Correctly detect memoized elements

• pretty-format: Fix pretty-format to respect displayName on forwardRef

Chore & Maintenance

• breaking

  *: Drop support for Node 6

• breaking

  *: Upgrade to Micromatch v4

• breaking

  babel-plugin-jest-hoist: Use ESM exports

• breaking

  jest: Use ESM exports

• breaking

  jest-cli: Use ESM exports

• breaking

  jest-cli: Remove re-exports from @jest/core

• breaking

  jest-environment-jsdom: Upgrade JSDOM from v11 to v15

• breaking

  jest-reporters: Upgrade Istanbul dependencies, which are used for code coverage

• breaking

  jest-util: Remove deprecated exports

• breaking

  jest-validate: Use ESM exports