example-pr-trigger-test

An example project showing how to setup a workflow to run Cypress tests when a PR is opened, and ensure that the test runs against the branch code (not main).

Prerequisites

Create a 'tests' folder at the root level and store your tests within it.
In this example we have a Cypress test script setup to run a schema validation check against an API endpoint.

Set the trigger

on:
  workflow_dispatch:
  pull_request:
    branches:
      - '**'  # Run on all branches when a PR is opened or updated

The workflow can also be manually triggered via workflow_dispatch. The pull_request event is set to trigger on all branches using branches: - '**', meaning it will run on any branch that has a pull request opened or updated.

Checkout the branch code

    steps:
      - name: Checkout the code
        uses: actions/checkout@v3
        with:
          # Checkout the branch associated with the PR
          ref: ${{ github.head_ref }}

ref: ${{ github.head_ref }} checks out the branch from which the PR is created, ensuring that the workflow tests the code from the correct branch associated with the pull request.

Trigger the test via PR.

To trigger the test (in this example), change the content of the example.txt file and create a PR.
The test will automatically trigger with results being reported back to the PR checks section.