processing / processing/processing4
Implement image comparison for visual tests
Nobody has claimed this yet.
- Dominant language
- Java
- Stars
- 494
- Forks
- 183
- Avg merge
- 4h 39m
- Merged PRs (30d)
- 3
Description
Implement a visual snapshot testing system, inspired by the one used in p5.js.
[!NOTE]
This has been added to our pr05 2025 project list.
Goals
- Develop a visual snapshot testing framework for Processing.
- Automate image comparisons using pixel matching (e.g., image-comparison).
- Integrate the testing system into GitHub workflows.
- Port existing p5.js snapshot tests and develop new ones for Processing’s Java environment.
Motivation
This will benefit both the Processing community and its future contributors by providing a reliable way to catch visual regressions, making it easier for contributors to propose changes with confidence.
References
Read more about the p5.js approach in the documentation and this contributor blog post.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reading the referenced p5.js visual-testing documentation and reviewing the image-comparison project, then inspect Processing’s existing GitHub workflows and any current snapshot tests. Done means a visual snapshot framework exists for Processing, pixel comparisons and workflow integration are automated, and relevant p5.js tests have been ported or new Java tests added.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- github-actions, java
- Domain
- ci-cd, testing
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100