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jest-dev-server

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jest-dev-server

Creates and tears down a local dev server during Jest tests.

  • 0.1.0
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  • npm
  • Socket score

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238K
increased by10.08%
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What is jest-dev-server?

The jest-dev-server package is a utility for running a development server while running Jest tests. It is particularly useful for end-to-end (E2E) testing where you need a server to be up and running before executing your tests.

What are jest-dev-server's main functionalities?

Starting a development server

This feature allows you to start a development server before running your tests. The `setupDevServer` function takes an object with a `command` to start the server and a `port` to listen on.

const { setup: setupDevServer } = require('jest-dev-server');

beforeAll(async () => {
  await setupDevServer({
    command: 'npm run start',
    port: 3000,
  });
});

Stopping the development server

This feature allows you to stop the development server after your tests have completed. The `teardownDevServer` function ensures that the server is properly shut down.

const { teardown: teardownDevServer } = require('jest-dev-server');

afterAll(async () => {
  await teardownDevServer();
});

Custom server options

This feature allows you to customize the server options such as `launchTimeout` and `debug` mode. This is useful for fine-tuning the server startup process to match your specific needs.

const { setup: setupDevServer } = require('jest-dev-server');

beforeAll(async () => {
  await setupDevServer({
    command: 'npm run start',
    port: 3000,
    launchTimeout: 50000,
    debug: true,
  });
});

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Package last updated on 14 May 2018

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