less/less.js

[To Do] Add visual regression (Backstop) tests to Less

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#3262 opened on Jul 4, 2018

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good first issuelow priorityup-for-grabs

Description

This came up for fixes to svg-gradient() (https://github.com/less/less.js/pull/3261). There are no automated visual regression tests, so it might be good to do so for functions that create visual assets. See: https://github.com/garris/BackstopJS

Contributor guide

Tech stack
javascriptcssnodejs
Domain
frontendtesting
Issue type
test
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Familiarity with Less CSSBasic knowledge of BackstopJSNode.js development environment
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
45
Research direction
Review the visual regression testing approach used in BackstopJS. The issue references PR #3261 for svg gradient function. Investigate which Less functions produce visual assets and design a test suite. Explore BackstopJS configuration and create baseline screenshots. See the Less repository's test structure.