@nrwl/jest
Advanced tools
The Nx Plugin for Jest contains executors and generators allowing your workspace to use the powerful Jest testing capabilities.
The @nrwl/jest package is part of the Nx suite of tools, designed to enhance the development experience with Jest in a monorepo setup. It provides seamless integration of Jest into Nx workspaces, enabling efficient unit testing configurations, execution, and optimizations tailored for projects managed within an Nx workspace.
Simplified Jest Configuration
Allows for simplified and centralized Jest configuration within an Nx workspace, making it easier to manage and share configurations across multiple library and application projects.
{
"jestConfig": "./jest.config.js",
"tsConfig": "./tsconfig.spec.json",
"setupFile": "./src/test-setup.ts"
}Parallel Test Execution
Enables parallel execution of tests across multiple projects within the workspace, significantly reducing the total time required for running tests in large projects.
nx run-many --target=test --all --parallelTest Affected Projects
Identifies and runs tests only for the projects affected by recent changes, improving efficiency in continuous integration pipelines by skipping tests for unchanged projects.
nx affected:testJest is the underlying testing framework that @nrwl/jest configures and enhances for use within Nx workspaces. While Jest can be used independently for testing JavaScript and TypeScript projects, @nrwl/jest provides additional integrations and optimizations for monorepo setups.
Mocha is another popular JavaScript test framework that can be used for unit and integration testing. Unlike @nrwl/jest, which is tailored for Jest and Nx workspaces, Mocha offers a more general-purpose testing solution without specific optimizations for monorepos or Nx.
Karma is a test runner developed by the AngularJS team, designed to work with any framework. It differs from @nrwl/jest by focusing on executing tests in real browsers, providing a more integrated environment for testing browser-specific features. However, it lacks the monorepo-specific enhancements provided by @nrwl/jest.
@nrwl/jest has been renamed to @nx/jest. Please use that instead.
@nrwl/jest will no longer be published in the future.
Nx is a build system, optimized for monorepos, with plugins for popular frameworks and tools and advanced CI capabilities including caching and distribution.
FAQs
The Nx Plugin for Jest contains executors and generators allowing your workspace to use the powerful Jest testing capabilities.
We found that @nrwl/jest demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 7 open source maintainers collaborating on the project.
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