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@jest/types
Advanced tools
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.
25.5.0
[@jest/globals]
New package so Jest's globals can be explicitly imported (#9801)[jest-core]
Show coverage of sources related to tests in changed files (#9769)[jest-runtime]
Populate require.cache
(#9841)[*]
Use graceful-fs
directly in every package instead of relying on fs
being monkey patched (#9443)[expect]
Prints the Symbol name into the error message with a custom asymmetric matcher (#9888)[jest-circus, jest-jasmine2]
Support older version of jest-runtime
(#9903 & #9842)[@jest/environment]
Make sure not to reference Jest types (#9875)[jest-message-util]
Code frame printing should respect --noStackTrace
flag (#9866)[jest-runtime]
Support importing CJS from ESM using import
statements (#9850)[jest-runtime]
Support importing parallel dynamic import
s (#9858)[jest-transform]
Improve source map handling when instrumenting transformed code (#9811)[docs]
Add an example for mocking non-default export class[jest-resolve]
Update resolve
to a version using native realpath
, which is faster than the default JS implementation (#9872)[jest-resolve]
Pass custom cached realpath
function to resolve
(#9873)[jest-runtime]
Add teardown
method to clear any caches when tests complete (#9906)[jest-runtime]
Do not pass files required internally through transformation when loading them (#9900)[jest-runtime]
Use Map
s instead of object literals as cache holders (#9901)FAQs
This package contains shared types of Jest's packages.
The npm package @jest/types receives a total of 38,296,545 weekly downloads. As such, @jest/types popularity was classified as popular.
We found that @jest/types demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 6 open source maintainers collaborating on the project.
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