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jest-config
Advanced tools
The jest-config package is used for configuring Jest, a popular JavaScript testing framework. It allows developers to programmatically access and manipulate Jest's configuration settings, making it easier to set up and customize tests for JavaScript projects. This package is particularly useful for complex setups or when integrating Jest into larger, automated workflows.
Accessing Default Configuration
This feature allows developers to access Jest's default configuration settings. It's useful for understanding the baseline configuration and for extending or customizing these defaults in a project.
const { defaults } = require('jest-config');
console.log(defaults);
Generating a Custom Configuration
This feature enables the creation of a custom Jest configuration programmatically. It's particularly useful for dynamically generating configurations based on specific project requirements or environments.
const { makeConfig } = require('jest-config');
const customConfig = makeConfig({
rootDir: process.cwd(),
transform: {
'^.+\\.js$': 'babel-jest'
}
});
console.log(customConfig);
Mocha is a feature-rich JavaScript test framework running on Node.js and in the browser, making asynchronous testing simple. While Mocha itself is not a configuration tool, it offers a flexible API and a variety of command-line options for configuring tests, similar to how jest-config allows for Jest test configuration.
Karma is a test runner for JavaScript that runs on Node.js. It is designed to work with any testing framework, such as Jasmine, Mocha, or QUnit. Karma itself is more about running tests in different environments rather than configuring a specific testing framework. However, it deals with the aspect of setting up testing environments, which can be seen as a parallel to configuring testing frameworks with jest-config.
AVA is a test runner for Node.js with a concise API, detailed error output, and process isolation that lets you develop with confidence. AVA's configuration approach is more direct and less flexible compared to jest-config, focusing on simplicity and convention over configuration.
24.9.0
[expect]
Highlight substring differences when matcher fails, part 1 (#8448)[expect]
Highlight substring differences when matcher fails, part 2 (#8528)[expect]
Improve report when mock-spy matcher fails, part 1 (#8640)[expect]
Improve report when mock-spy matcher fails, part 2 (#8649)[expect]
Improve report when mock-spy matcher fails, part 3 (#8697)[expect]
Improve report when mock-spy matcher fails, part 4 (#8710)[expect]
Throw matcher error when received cannot be jasmine spy (#8747)[expect]
Improve report when negative CalledWith assertion fails (#8755)[expect]
Improve report when positive CalledWith assertion fails (#8771)[expect]
Display equal values for ReturnedWith similar to CalledWith (#8791)[expect, jest-snapshot]
Change color from green for some args in matcher hints (#8812)[jest-snapshot]
Highlight substring differences when matcher fails, part 3 (#8569)[jest-core]
Improve report when snapshots are obsolete (#8665)[jest-cli]
Improve chai support (with detailed output, to match jest exceptions) (#8454)[*]
Manage the global timeout with --testTimeout
command line argument. (#8456)[pretty-format]
Render custom displayName of memoized components (#8546)[jest-validate]
Allow maxWorkers
as part of the jest.config.js
(#8565)[jest-runtime]
Allow passing configuration objects to transformers (#7288)[@jest/core, @jest/test-sequencer]
Support async sort in custom testSequencer
(#8642)[jest-runtime, @jest/fake-timers]
Add jest.advanceTimersToNextTimer
(#8713)[@jest-transform]
Extract transforming require logic within jest-core
into @jest-transform
(#8756)[jest-matcher-utils]
Add color options to matcherHint
(#8795)[jest-circus/jest-jasmine2]
Give clearer output for Node assert errors (#8792)[jest-runner]
Export all types in the type signature of jest-runner
(#8825)[jest-cli]
Detect side-effect only imports when running --onlyChanged
or --changedSince
(#8670)[jest-cli]
Allow --maxWorkers
to work with % input again (#8565)[babel-plugin-jest-hoist]
Expand list of whitelisted globals in global mocks (#8429)[jest-core]
Make watch plugin initialization errors look nice (#8422)[jest-snapshot]
Prevent inline snapshots from drifting when inline snapshots are updated (#8492)[jest-haste-map]
Don't throw on missing mapper in Node crawler (#8558)[jest-core]
Fix incorrect passWithNoTests
warning (#8595)[jest-snapshots]
Fix test retries that contain snapshots (#8629)[jest-mock]
Fix incorrect assignments when restoring mocks in instances where they originally didn't exist (#8631)[expect]
Fix stack overflow when matching objects with circular references (#8687)[jest-haste-map]
Workaround a node >=12.5.0 bug that causes the process not to exit after tests have completed and cancerous memory growth (#8787)[docs]
Replace FlowType with TypeScript in CONTRIBUTING.MD code conventions[jest-leak-detector]
remove code repeat (#8438)[docs]
Add example to jest.requireActual
(#8482)[docs]
Add example to jest.mock
for mocking ES6 modules with the factory
parameter (#8550)[docs]
Add information about using jest.doMock
with ES6 imports (#8573)[docs]
Fix variable name in custom-matcher-api code example (#8582)[docs]
Fix example used in custom environment docs (#8617)[docs]
Updated react tutorial to refer to new package of react-testing-library (@testing-library/react) (#8753)[docs]
Updated imports of react-testing-library to @testing-library/react in website (#8757)[jest-core]
Add getVersion
(moved from jest-cli
) (#8706)[docs]
Fix MockFunctions example that was using toContain instead of toContainEqual (#8765)[*]
Make sure copyright header comment includes license (#8783)[*]
Check copyright and license as one joined substring (#8815)[docs]
Fix WatchPlugins jestHooks.shouldRunTestSuite
example that receives an object (#8784)[*]
Enforce LF line endings (#8809)[pretty-format]
Delete obsolete link and simplify structure in README (#8824)[docs]
Fix broken transform link on webpack page (#9155)FAQs
Unknown package
The npm package jest-config receives a total of 19,754,810 weekly downloads. As such, jest-config popularity was classified as popular.
We found that jest-config demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 3 open source maintainers collaborating on the project.
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