Additional Jest matchers for snapshot testing. Latest version: 1.1.5, last published: 4 years ago. Start using jest-extended-snapshot in your project by running `npm i jest-extended-snapshot`. There are 0 other projects in the npm registry using jest-extended-snapshot.| npm
When you're writing tests, you often need to check that values meet certain conditions. expect gives you access to a number of "matchers" that let you validate different things.| jestjs.io
The jest command line runner has a number of useful options. You can run jest --help to view all available options. Many of the options shown below can also be used together to run tests exactly the way you want. Every one of Jest's Configuration options can also be specified through the CLI.| jestjs.io
Mock functions are also known as "spies", because they let you spy on the behavior of a function that is called indirectly by some other code, rather than only testing the output. You can create a mock function with jest.fn(). If no implementation is given, the mock function will return undefined when invoked.| jestjs.io
The jest object is automatically in scope within every test file. The methods in the jest object help create mocks and let you control Jest's overall behavior. It can also be imported explicitly by via import from '@jest/globals'.| jestjs.io
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'.| jestjs.io
Jest 25 is laying the groundwork for many major changes in the future. As such, we kept breaking changes to a minimum, but internal architecture changes may require attention during the upgrade. The main changes are an upgrade of JSDOM from v11 to v15, 10-15% faster test runs, a new diff view for outdated snapshots and dropped Node 6 support.| jestjs.io
With the release of React Native 0.72, Metro — our JavaScript build tool — now includes beta support for the package.json "exports" field. When enabled, it adds the following functionality:| reactnative.dev
React Testing Library does not require any configuration to be used. However,| testing-library.com
Snapshot tests are a very useful tool whenever you want to make sure your UI does not change unexpectedly.| jestjs.io
