Test Suite workflow (encode/httpx)

The Test Suite workflow from encode/httpx, explained and optimized by Latchkey.

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Source: encode/httpx.github/workflows/test-suite.ymlLicense BSD-3-ClauseView source

What it does

This is the Test Suite workflow from the encode/httpx repository, a real project running GitHub Actions. It is shown here with attribution under its BSD-3-Clause license.

Below, Latchkey shows a faster, safer version produced by its optimization engine.

The workflow

workflow (.yml)

---
name: Test Suite

on:
  push:
    branches: ["master"]
  pull_request:
    branches: ["master", "version-*"]

jobs:
  tests:
    name: "Python ${{ matrix.python-version }}"
    runs-on: "ubuntu-latest"

    strategy:
      matrix:
        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]

    steps:
      - uses: "actions/checkout@v4"
      - uses: "actions/setup-python@v6"
        with:
          python-version: "${{ matrix.python-version }}"
          allow-prereleases: true
      - name: "Install dependencies"
        run: "scripts/install"
      - name: "Run linting checks"
        run: "scripts/check"
      - name: "Build package & docs"
        run: "scripts/build"
      - name: "Run tests"
        run: "scripts/test"
      - name: "Enforce coverage"
        run: "scripts/coverage"

The same workflow, on Latchkey

Removes redundant runs and caps runaway jobs. Added and changed lines are highlighted.

---
name: Test Suite
 
on:
  push:
    branches: ["master"]
  pull_request:
    branches: ["master", "version-*"]
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  tests:
    timeout-minutes: 30
    name: "Python ${{ matrix.python-version }}"
    runs-on: "ubuntu-latest"
 
    strategy:
      matrix:
        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
 
    steps:
      - uses: "actions/checkout@v4"
      - uses: "actions/setup-python@v6"
        with:
          python-version: "${{ matrix.python-version }}"
          allow-prereleases: true
      - name: "Install dependencies"
        run: "scripts/install"
      - name: "Run linting checks"
        run: "scripts/check"
      - name: "Build package & docs"
        run: "scripts/build"
      - name: "Run tests"
        run: "scripts/test"
      - name: "Enforce coverage"
        run: "scripts/coverage"

What changed

Cancel superseded runs when a branch or PR gets a newer push.
Add a job timeout so a hung step cannot burn hours of runner time.

This workflow runs 1 job (5 with the matrix expanded) per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.