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  • Jest · Delightful JavaScript Testing
    Jest is a JavaScript testing framework designed to ensure correctness of any JavaScript codebase It allows you to write tests with an approachable, familiar and feature-rich API that gives you results quickly
  • Getting Started - Jest
    Jest can be used in projects that use webpack to manage assets, styles, and compilation webpack does offer some unique challenges over other tools Refer to the webpack guide to get started Using Vite Jest is not supported by Vite due to incompatibilities with the Vite plugin system
  • Jest 30: Faster, Leaner, Better · Jest - jestjs. io
    Today we are happy to announce the release of Jest 30 This release features a substantial number of changes, fixes, and improvements While it is one of the largest major releases of Jest ever, we admit that three years for a major release is too long
  • Configuring Jest · Jest
    Jest attempts to scan your dependency tree once (up-front) and cache it in order to ease some of the filesystem churn that needs to happen while running tests This config option lets you customize where Jest stores that cache data on disk
  • Testing React Apps · Jest
    Don't forget to install the @babel core and babel-preset-jest packages for this example to work To make this work with Jest you need to update your Jest configuration with this: "transform": {"\\ js$": "path to custom-transformer js"}
  • From v29 to v30 · Jest - jestjs. io
    Jest has introduced significant under-the-hood changes to how its packages are bundled and exported: All of Jest’s internal modules are now bundled into single files for faster startup This means when you install Jest, the number of files it loads is greatly reduced (improving performance)
  • Globals - Jest
    In your test files, Jest puts each of these methods and objects into the global environment You don't have to require or import anything to use them However, if you prefer explicit imports, you can do import {describe, expect, test} from '@jest globals'
  • Expect - Jest
    Jest adds the inlineSnapshot string argument to the matcher in the test file (instead of an external snap file) the first time that the test runs Check out the section on Inline Snapshots for more info




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