add Coveralls to track test coverage

Gemfile

@@ -38,6 +38,7 @@ end
 group :test do
   gem 'cancan'
   gem 'capybara',        '1.1.2'
+  gem 'coveralls',       '~> 0.6.7', require: false # Test coverage tool: www.coveralls.io
   gem 'cucumber-rails',  '1.3.0', :require => false
   gem 'database_cleaner'
   gem 'guard-coffeescript'

spec/spec_helper_without_rails.rb

@@ -7,3 +7,5 @@
 
 require 'detect_rails_version'
 ENV['RAILS'] = detect_rails_version
+
+require 'coveralls' and Coveralls.wear_merged! if ENV['TRAVIS']

tasks/test.rake

@@ -7,8 +7,11 @@ task :setup do
 end
 
 # Run specs and cukes
+# If run by Travis, submit test coverage data to www.coveralls.io
 desc "Run the full suite using 1 core"
-task :test => ['spec:unit', 'spec:integration', 'cucumber', 'cucumber:class_reloading']
+task test: ['spec:unit', 'spec:integration', 'cucumber', 'cucumber:class_reloading'] do
+  require 'coveralls' and Coveralls.push! if ENV['TRAVIS']
+end
 
 namespace :test do