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

@proof-ui/image-snapshot-plugin

v0.3.6

Published

Provides Proof with visual regression testing capabilities by porting over functionality from (jest-image-snapshot)[https://github.com/americanexpress/jest-image-snapshot].

Downloads

5

Readme

@proof-ui/image-snapshot-plugin

Provides Proof with visual regression testing capabilities by porting over functionality from (jest-image-snapshot)[https://github.com/americanexpress/jest-image-snapshot].

Installation

yarn add -D @proof-ui/image-snapshot-plugin

Usage

// proof.config.js
import ImageSnapshotPlugin from '@proof-ui/image-snapshot-plugin';

export default {
  plugins: [
    new ImageSnapshotPlugin({
      // Configuration
    })
  ]
};

The image snapshot plugin closely mimics the normal react/jest snapshot testing workflow.

Start by writing a proof snapshot test for your story. The plugin provides a method on the browser object that will create a snapshot for you.

const proofs = proofsOf('Button');

proofs.add('Basic Usage', async ({ browser }) => {
  await browser.matchImageSnapshot();
});

Multipe snapshots can be taken per test.

const proofs = proofsOf('Button');

proofs.add('Basic Usage', async ({ browser }) => {
  await browser.matchImageSnapshot();
  const button = await browser.$('button');
  await button.click();
  await browser.matchImageSnapshot();
});

The matchImageSnapshot method can be configured individually by passing an options parameters to the functions. It takes all the same options available to (jest-image-snapshot)[https://github.com/americanexpress/jest-image-snapshot].

  await browser.matchImageSnapshot({
    failureThresholdType: 'percent',
    failureThreshold: 0.01
  });

It can also be configured globally:

// proof.config.js

export default {
  plugins: [
    new ImageSnapshotPlugin({
      globalMatchOptions: {
        failureThreshold: 0.01,
        diffDirection: 'horizontal'
      }
    })
  ]
};

In addition to all the options from jest-image-snapshot. This library adds a couple more to help with proof. It adds windowHeight, windowWidth, and augments the customSnapshotIdentifier function for more nuanced snapshot naming.

  await browser.matchImageSnapshot({
    windowHeight: 714,
    windowWidth: 1214,
    customSnapshotIdentifier({ currentTestName, counter }) {
      return `${this.browserName}-${currentTestName}-${this.windowWidth}x${this.windowHeight}-${counter}`;
    }
  });

After adding snapshot tests you can run your proof test suite as normal.

# Command Line Usage
proof

To update your snapshot baseline images add the updateSnapshots flag.

# Command Line Usage
proof --updateSnapshots

Options

You can configure the ImageSnapshotPlugin through some options in it's constructor:

| Property | Description | Type | Default | | ------------ | ---------------------------------------------------------------------------------------- | -------- | ------------------- | | getSnapshotsDir | A function that returns a string path that tells the plugin where to save image snapshots. | function | () => components/${kind}/src/__image_snapshots__ | | globalMatchOptions | (jest-image-snapshot)[https://github.com/americanexpress/jest-image-snapshot] options that will be applied globally. | ImageSnapshotArgs | |

For ideas on how to incorporate this into your CI flow. Check out (this article)[https://baseweb.design/blog/visual-regression-testing/].