pyodide / pyodide/pytest-pyodide

Implement Deno runner

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OSSCA2025
Dominant language
Python
Stars
38
Forks
20
Avg merge
1d 23h
Merged PRs (30d)
1

Description

Description

The pytest-pyodide plugin provides a way to run Python test code in Pyodide in different JS runtimes, including Chrome, Firefox, Safari, and Node.js.

Recently, a few projects (pydantic-ai, Langchain Sandbox) started to utilize Pyodide in Deno, to provide sandboxed Python environment.

Therefore, I think it would be nice if we can run full test suite in Deno as well. For that, supporting Deno in pytest-pyodide is required.

Goal

  • Implement a new runner for Deno in pytest-pyodide
  • Use Deno runner in pyodide core test suites

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by locating the existing JavaScript-runtime runners in pytest-pyodide and the integration points for the Pyodide core test suites. Trace how current runners are invoked, then verify that a Deno runner can execute the full core test suites alongside Chrome, Firefox, Safari, and Node.js.

Written by the indexing model from the issue text.

Assessment

Tech stack
deno, python
Domain
testing, tooling
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
42/100

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