Continuous Integration (CI) is a vital practice in modern software development, enabling teams to automatically test and deploy their applications. For developers working with Capacitor, a popular framework for building cross-platform mobile apps, setting up CI for End-to-End (E2E) tests ensures that applications function correctly across different environments. This tutorial guides you through configuring Travis CI to run Capacitor E2E tests seamlessly.

Prerequisites

  • A GitHub repository with your Capacitor project.
  • Travis CI account linked to your GitHub repository.
  • Basic knowledge of Capacitor, npm, and Travis CI configuration.
  • Existing E2E tests written using your preferred testing framework.

Configuring Travis CI

Begin by creating a .travis.yml file in the root of your project. This file defines the build environment and the steps Travis CI will execute.

Sample .travis.yml File

Below is a sample configuration tailored for a Capacitor project with E2E tests:

language: node_js
node_js:
  - '14'
dist: focal
services:
  - xvfb
before_install:
  - npm install -g @capacitor/cli
install:
  - npm install
script:
  - npx cap sync
  - npm run build
  - npm run test:e2e

Setting Up E2E Tests

Ensure your package.json includes scripts for building and testing E2E:

language: json
{
  "scripts": {
    "build": "webpack --config webpack.config.js",
    "test:e2e": "cypress run"
  }
}

Running Tests in CI

When you push your code to GitHub, Travis CI automatically triggers the build process. It installs dependencies, synchronizes Capacitor plugins, builds the project, and runs E2E tests in a headless browser environment.

Additional Tips

  • Use environment variables in Travis CI for sensitive data like API keys.
  • Configure your E2E tests to run in headless mode for CI environments.
  • Leverage Travis CI caching to speed up build times.

By following these steps, you can establish a reliable CI pipeline for your Capacitor E2E tests, ensuring consistent quality across your mobile applications.