Travis CI integration - Step by step tutorial

Travis CI is an open-source, free, and hosted continuous integration service that builds and runs unit tests for you on every commit to a GitHub repository. It supports many languages and allows you to configure steps using a simple .travis.yml file in the root of your repo.

Features

• Watch tests as they run
• Clean VM for every build
• Parallel test execution
• Slack, Email, and HipChat notifications
• Linux and Mac support

Getting Started

1. Sign into Travis CI with your GitHub account.
2. 
3. Add a .travis.yml file to your project’s root folder.

Example .travis.yml for a Ruby project:

language: ruby
rvm:
  - '2.2.0'
env:
  - DB=mysql
script:
  - RAILS_ENV=test bundle exec rake db:migrate --trace
  - bundle exec rake db:test:prepare
  - bundle exec rspec spec/
before_script:
  - mysql -e 'create database myapp_test'
bundler_args: --binstubs=./bundler_stubs

Database Configuration

MySQL on Travis CI binds to 127.0.0.1. You can connect using the username travis or root with a blank password.

Example config/database.yml:

test:
  adapter: mysql2
  database: myapp_test
  username: travis
  encoding: utf8

4. Commit and push to GitHub. Travis will automatically trigger a build.
5. Check your build status on the Travis dashboard.

Check out an example build here.