jest-util

Previously failed tests are now always run first.

A new concurrent reporter shows currently running tests, a test summary, a progress bar and estimated remaining time if possible.

Improved CLI colors.

jest <pattern> is now case-insensitive.

Added it.only, it.skip, test.only, test.skip and xtest.

Added --testNamePattern=pattern or -t <pattern> to run individual tests in test files.

Jest now warns for duplicate mock files.

Pressing a, o, p, q or enter while tests are running in the watch mode, the test run will be interrupted.

--bail now works together with --watch.

Added test.concurrent for concurrent async tests.

Jest now automatically considers files and tests with the .jsx extension.

Added jest.clearAllMocks to clear all mocks manually.

Rewrote Jest's snapshot implementation. jest-snapshot can now be more easily integrated into other test runners and used in other projects.

This requires most snapshots to be updated when upgrading Jest.

Objects and Arrays in snapshots are now printed with a trailing comma.

Function names are not printed in snapshots any longer to reduce issues with code coverage instrumentation and different Node versions.

Snapshots are now sorted using natural sort order.

Snapshots are not marked as obsolete any longer when using fit or when an error is thrown in a test.

Finished migration of Jasmine matchers to the new Jest matchers.

Pretty print toHaveBeenLastCalledWith, toHaveBeenCalledWith, lastCalledWith and toBeCalledWith failure messages.

Added toBeInstanceOf matcher.

Added toContainEqual matcher.

Added toThrowErrorMatchingSnapshot matcher.

Improved moduleNameMapper resolution.

Module registry fixes.

Fixed invocation of the setupTestFrameworkScriptFile script to make it easier to use chai together with Jest.

Removed react-native special case in Jest's configuration.

Added --findRelatedTests <fileA> <fileB> cli option to run tests related to the specified files.

Added jest.deepUnmock to babel-plugin-jest-hoist.

Added jest.runTimersToTime which is useful together with fake timers.

Improved automated mocks for ES modules compiled with babel.