Add TravisCI config

Author: workgena

.travis.yml

@@ -0,0 +1,19 @@
+sudo: required
+language: ruby
+addons:
+  chrome: stable
+
+before_install: gem install bundler -v 1.17.1
+
+script: bundle exec rspec
+
+env:
+  matrix:
+    - RAILS=5.1.6 AA=1.1.0
+    - RAILS=5.1.6 AA=1.2.1
+    - RAILS=5.2.1 AA=1.3.1
+    - RAILS=5.2.1 AA=1-4-stable
+
+rvm:
+  - 2.3
+  - 2.5

Gemfile

@@ -4,15 +4,18 @@ source 'https://rubygems.org'
 gemspec
 
 group :test do
-  gem 'rails', '~> 5.1.6'
-  gem 'turbolinks'
+  gem 'rails', "#{ENV['RAILS'] || '5.2.1'}"
+  if ENV['AA'] == '1-4-stable'
+    gem 'activeadmin', git: 'https://github.com/activeadmin/activeadmin.git', branch: '1-4-stable'
+  else
+    gem 'activeadmin', "#{ENV['AA'] || '1.3.1'}"
+  end
+
   gem 'rspec-rails'
-  gem 'activeadmin', '~> 1.1.0'
-  gem 'sass-rails'
   gem 'sqlite3'
-  gem 'launchy'
   gem 'database_cleaner'
   gem 'capybara'
   gem 'selenium-webdriver'
   gem 'chromedriver-helper'
+  gem 'byebug'
 end