npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

data-snapshot

v1.0.1

Published

Generic mock data manager for real endpoints.

Downloads

6

Readme

Build Status code style: prettier codecov npm version license

data-snapshot 📸

data-snapshot is a generic mock data manager for JavaScript tests, that helps you use data from real endpoints in tests.

On first run / update, data-snapshot executes the thunk (which returns a promise), and then writes the result of the promise to disk to avoid network calls on subsequent test runs.

A __data_snapshots__ is created adjacent to your test file (similar to Jest's __snapshots__), with the same name as your test file. Mock data is stored within that file.

You can then update your data by rerunning your specs with a --updateSnapshot/-u flag, or by deleting the snapshot file.

Data snapshots should be committed to version control, as regular snapshot files are. The snapshot file is then used in CI.

Installing

npm i --save-dev data-snapshot

Usage

import dataSnapshot from 'data-snapshot';

// hits endpoint on first run; resolves from disk on 2nd
const fetchData = id => fetch(`/api/${id}`).then(r => r.json());

test('some-spec', async () => {
  const data = await dataSnapshot('key', () => fetchData(1));
  expect(data.a).toBe(true);
});
Expires

The data is never actually expired (to avoid CI unintentionally triggering an Ajax call, etc). However, if you would like to be reminded with a console warning to update your data periodically, set an expires flag.

const ONE_MONTHISH = 1000 * 60 * 60 * 24 * 30;
dataSnapshot('key', thunkPromise, {expires: Date.now() + ONE_MONTHISH});

API

dataSnapshot<D>(
  name: string,
  thunkPromise: () => Promise<D>,
  opts: {expires?: number} = {}
): Promise<D>

--updateSnapshot/-u will re execute your data fetcher (jest --updateSnapshot).

Running the tests

npm test

Built With

Contributing

Please read CODE_OF_CONDUCT.md for details on our Code of Conduct.

To contribute, please open an issue, or submit a pull request with appropriate test coverage.

License

This project is licensed under the BSD-2-Clause license - see the LICENSE.md file for details