Head-to-Head: jest-image-snapshot vs Pixelmatch Analysis

jest-image-snapshot

v6.4.0(4 months ago)

This package is actively maintained.Types definitions are provided via a separate npm package: @types/jest-image-snapshotNumber of direct dependencies: 8Monthly npm downloads

jest-image-snapshot is a Jest plugin that enables snapshot testing for images in your JavaScript projects. It allows you to compare and assert visual changes in images by capturing and storing image snapshots during test runs. This helps in detecting unintended changes in image outputs and ensures visual consistency across different test runs.

Alternatives:
cypress-image-snapshot+
puppeteer-to-istanbul+
mocha+
chai+
jasmine+
ava+
tape+
qunit+
karma+
playwright+

Tags: jestsnapshot-testingimage-comparisonvisual-regression-testingtesting

pixelmatch

v5.3.0(almost 2 years ago)

This package was last published over a year ago. It may not be actively maintained.Types definitions are provided via a separate npm package: @types/pixelmatchNumber of direct dependencies: 1Monthly npm downloads

Pixelmatch is a lightweight and efficient JavaScript pixel-level image comparison library. It is commonly used for visual regression testing in web development to detect changes between images at a pixel level. Pixelmatch provides accurate and customizable image diffing capabilities, allowing developers to identify even the smallest differences between images.

Alternatives:
resemblejs+
looks-same+
odiff-bin+
blink-diff+
image-diff+
jest-image-snapshot+
pdiffy+
img-diff-js+
image-difference+
visual-regression-tracker+

Tags: javascriptimage-comparisonvisual-regression-testingpixel-levelimage-diffing

Fight!

Functionality

Both Jest Image Snapshot and Pixelmatch are npm packages used for image comparison and snapshot testing. Jest Image Snapshot is specifically designed for use with Jest, a popular testing framework for JavaScript, while Pixelmatch is a standalone library that can be used with any testing framework or as a standalone tool. Jest Image Snapshot provides a higher-level API and integrates seamlessly with Jest's snapshot testing functionality, making it easier to use for developers already using Jest. Pixelmatch, on the other hand, offers more fine-grained control and flexibility in image comparison algorithms and options.

Ease of Use

Jest Image Snapshot is designed to be easy to use and requires minimal setup. It provides a simple API for capturing and comparing image snapshots within Jest tests. Pixelmatch, while more flexible, requires more manual configuration and setup. Developers using Pixelmatch will need to handle image loading, scaling, and other operations manually.

Performance

In terms of performance, Pixelmatch is generally faster than Jest Image Snapshot. Pixelmatch is a lightweight library optimized for speed and efficiency, making it suitable for scenarios where performance is critical. Jest Image Snapshot, being built on top of Jest, may have some additional overhead and may not be as performant in certain scenarios.

Community and Support

Both Jest Image Snapshot and Pixelmatch have active communities and are well-maintained. Jest, the testing framework that Jest Image Snapshot is built for, has a large and active community, providing a wealth of resources and support. Pixelmatch also has a dedicated community and offers good documentation and support.

Integration

Jest Image Snapshot integrates seamlessly with Jest's snapshot testing functionality, allowing developers to easily incorporate image comparison into their existing Jest test suites. Pixelmatch, being a standalone library, can be integrated with any testing framework or used as a standalone tool. This gives developers more flexibility in choosing their testing setup.