add travis

.travis.yml

@@ -0,0 +1,18 @@
+language: ruby
+
+rvm:
+  - 2.2
+  - 2.1
+
+sudo: false
+cache:
+  bundler: true
+
+branches:
+  only:
+    - 'master'
+
+before_install: gem install bundler
+bundler_args: "--deployment --without development --jobs=3 --retry=3"
+
+script: "./script/ci/travis.sh"

Rakefile

@@ -21,7 +21,6 @@ load "rails/tasks/statistics.rake"
 
 Bundler::GemHelper.install_tasks
 
-require "rspec/core/rake_task"
-RSpec::Core::RakeTask.new(:spec)
+Rails.application.load_tasks
 
 task default: :spec

lib/tasks/tests.rake

@@ -0,0 +1,6 @@
+namespace :ci do
+  namespace :travis do
+    desc "Run specs"
+    task run: %w(spec)
+  end
+end

script/ci/travis.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+
+command="bundle exec rake --trace ci:travis:run"
+exec $command