@jest/types
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Package description
The @jest/types package provides TypeScript definitions and utility types for Jest, a popular JavaScript testing framework. It includes types for Jest configuration, global variables, and other utilities that help in creating type-safe test environments and extending Jest functionalities.
Config
Defines types for Jest configuration options. This allows for type-safe Jest configuration files, ensuring that any configuration options passed to Jest are valid.
{"globals": {"myGlobal": "value"}, "testMatch": ["**/__tests__/**/*.js?(x)", "**/?(*.)+(spec|test).js?(x)"]}Global
Provides types for Jest's global variables and functions, such as 'describe', 'it', and 'expect'. This is useful for creating custom global setups or mocks in a type-safe manner.
"declare var jest: jest.Jest"Mock
Includes types for Jest's mocking utilities, enabling developers to create and manipulate mocks with full TypeScript support.
"const mockedFunction: jest.Mock = jest.fn()"Before Jest provided its own TypeScript definitions, @types/jest was the go-to package for Jest types. It serves a similar purpose by providing type definitions for Jest, but @jest/types is more up-to-date and maintained by the Jest team.
While ts-jest is primarily a TypeScript preprocessor for Jest, allowing Jest to understand TypeScript files, it also includes some utility types for configuration. However, @jest/types focuses solely on providing comprehensive type definitions for Jest's API.
jest-mock-extended provides extended types and utilities for mocking in Jest, particularly with TypeScript. It complements @jest/types by offering more detailed mock creation and manipulation capabilities, though @jest/types provides the foundational type definitions.
Changelog
24.8.0
[jest-circus] Bind to Circus events via an optional event handler on any custom env (#8344)[expect] Improve report when matcher fails, part 15 (#8281)[jest-cli] Update --forceExit and "did not exit for one second" message colors (#8329)[expect] Improve report when matcher fails, part 16 (#8306)[jest-runner] Pass docblock pragmas to TestEnvironment constructor (#8320)[docs] Add DynamoDB guide (#8319)[expect] Improve report when matcher fails, part 17 (#8349)[expect] Improve report when matcher fails, part 18 (#8356)[expect] Improve report when matcher fails, part 19 (#8367)[jest-each] Fix bug with placeholder values (#8289)[jest-snapshot] Inline snapshots: do not indent empty lines (#8277)[@jest/runtime, @jest/transform] Allow custom transforms for JSON dependencies (#8278)[jest-core] Make detectOpenHandles imply runInBand (#8283)[jest-haste-map] Fix the mapper option which was incorrectly ignored (#8299)[jest-jasmine2] Fix describe return value warning being shown if the describe function throws (#8335)[jest-environment-jsdom] Re-declare global prototype of JSDOMEnvironment (#8352)[jest-snapshot] Handle arrays when merging snapshots (#7089)[expect] Extract names of async and generator functions (#8362)[jest-runtime] Fix virtual mocks not being unmockable after previously being mocked (#8396)[jest-transform] Replace special characters in transform cache filenames to support Windows (#8353)[jest-config] Allow exactly one project (#7498)[expect] Fix label and add opposite assertion for toEqual tests (#8288)[docs] Mention Jest MongoDB Preset (#8318)[@jest/reporters] Migrate away from istanbul-api (#8294)[*] Delete obsolete emails tag from header comment in test files (#8377)[expect] optimize compare nodes (#8368)[docs] Fix typo in MockFunctionAPI.md (#8406)[LICENSE] Follow copyright header guidelines and delete For Jest software (#8428)FAQs
This package contains shared types of Jest's packages.
The npm package @jest/types receives a total of 43,827,116 weekly downloads. As such, @jest/types popularity was classified as popular.
We found that @jest/types demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 6 open source maintainers collaborating on the project.
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