App testing workflow (streamlit/llm-examples)

The App testing workflow from streamlit/llm-examples, explained and optimized by Latchkey.

CI health: F - at risk

Point runs-on at Latchkey and get caching, run de-duplication, job timeouts, SHA-pinned actions, self-healing for flaky steps, and up to 58% lower cost, applied automatically.

Grade your own workflow free or run it on Latchkey →

Source: streamlit/llm-examples.github/workflows/app-testing.ymlLicense Apache-2.0View source

What it does

This is the App testing workflow from the streamlit/llm-examples repository, a real project running GitHub Actions. It is shown here with attribution under its Apache-2.0 license.

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

The workflow

workflow (.yml)

name: App testing

on:
  push:
    branches: [ "main" ]
  pull_request:
    branches: [ "main" ]

permissions:
  contents: read

jobs:
  streamlit:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
        with:
          python-version: '3.11'
      - uses: streamlit/streamlit-app-action@v0.0.3
        with:
          app-path: Chatbot.py
          ruff: true
          pytest-args: -v --junit-xml=test-results.xml
      - if: always()
        uses: pmeier/pytest-results-action@v0.6.0
        with:
          path: test-results.xml
          summary: true
          display-options: fEX

The same workflow, on Latchkey

Estimated ~20% faster on cache hits, plus fewer wasted runs and a safer supply chain. Added and changed lines are highlighted.

name: App testing
 
on:
  push:
    branches: [ "main" ]
  pull_request:
    branches: [ "main" ]
 
permissions:
  contents: read
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  streamlit:
    timeout-minutes: 30
    runs-on: latchkey-small
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-python@v5
        with:
          cache: 'pip'
          python-version: '3.11'
      - uses: streamlit/streamlit-app-action@v0.0.3
        with:
          app-path: Chatbot.py
          ruff: true
          pytest-args: -v --junit-xml=test-results.xml
      - if: always()
        uses: pmeier/pytest-results-action@v0.6.0
        with:
          path: test-results.xml
          summary: true
          display-options: fEX

What changed

Run on Latchkey managed runners with one line (runs-on), which apply the fixes below automatically and self-heal transient failures. This example uses latchkey-small; pick the runner size that fits the job.
Cancel superseded runs when a branch or PR gets a newer push.
Cache dependency installs on the setup step so they are served from cache.
Add a job timeout so a hung step cannot burn hours of runner time.

2 third-party actions are referenced by a movable tag. Pin them to the commit SHA (Latchkey resolves and applies this automatically) so a repointed tag cannot change what runs.

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

Actions used in this workflow

actions/checkout actions/setup-python