Run the Tests on Every Push

Continuous integration (CI) means your tests run by themselves every time you push. On GitHub you ask for it with a workflow: a YAML file in the folder .github/workflows/, made of key: value lines nested by their indentation. The key on says which event starts it, and each job runs its steps from top to bottom on a fresh machine, the runner.

Here is a small workflow of another kind. It starts on every pull request and runs one command:

name: Hello
on: pull_request
jobs:
  greet:
    runs-on: ubuntu-latest
    steps:
      - run: echo Hello from the runner

A step either uses a ready-made action, such as actions/checkout, which copies your repository onto the runner, or runs a command, as you would type it in a terminal. The runner starts with a Node.js of its own and nothing of yours: no code, no Express. So the order matters: copy the code, set up the server's Node.js, install the packages with npm ci, then run the tests. The job stops at the first step that fails.

You write the workflow as the string workflow: an array with one string per line of the file, joined with \n. The check reads it the way GitHub would, runs the job and must print:

Workflow: Tests
Starts on: push
Job test, on a fresh ubuntu-latest machine
Step 1: uses actions/checkout@v6
  copied the repository: app.js, package.json, package-lock.json, app.test.js
Step 2: uses actions/setup-node@v6 with node-version 22
  Node.js 22 is ready
Step 3: run npm ci
  installed express 5.1.0 and the packages it needs, in the exact versions written in package-lock.json
Step 4: run node --test
  tests 3, pass 3, fail 0
The job passed: every push now runs the tests on Node.js 22.

Your task: the starting workflow already has its name and the job test on ubuntu-latest. Add the trigger on: push and four steps: check out the code with actions/checkout@v6, set up Node.js '22' with actions/setup-node@v6, install the packages with npm ci, and run the tests with node --test.

Assignment
Follow the Coding Tutorial to write a GitHub Actions workflow that runs the shop's tests on Node.js 22 on every push.

Hint
Indentation is the structure, and it must be spaces: the step items start 6 spaces in with a dash, with: sits 8 spaces in under its uses, and node-version 10. Write the version in quotes, '22', so YAML keeps it as text.