@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
25.4.0
[expect] Support async functions in toThrow (#9817)[jest-console] Add code frame to console.error and console.warn (#9741)[jest-runtime, jest-jasmine2, jest-circus] Experimental, limited ECMAScript Modules support (#9772 & #9842)[expect] Restore support for passing functions to toHaveLength matcher (#9796)[jest-changed-files] --only-changed should include staged files (#9799)[jest-circus] Throw on nested test definitions (#9828)[jest-each] each will throw an error when called with too many arguments (#9818)[jest-runner] Don't print warning to stdout when using --json (#9843)FAQs
This package contains shared types of Jest's packages.
The npm package @jest/types receives a total of 43,350,665 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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