add SimpleCov

Author: korny

Gemfile

@@ -12,6 +12,7 @@ group :development do
   gem 'rdoc',             Gem::Version.new(RUBY_VERSION) < Gem::Version.new('1.9.3') ? '~> 4.2.2' : Gem::Version.new(RUBY_VERSION) < Gem::Version.new('2.2.2') ? '< 6' : '>= 6'
   gem 'RedCloth',         RUBY_PLATFORM == 'java' ? '= 4.2.9' : '>= 4.0.3'
   gem 'rspec',            '~> 3.9.0'
+  gem 'simplecov',        '~> 0.17.1'
   gem 'shoulda-context',  RUBY_VERSION < '1.9' ? '= 1.2.1'    : '>= 1.2.1'
   gem 'term-ansicolor',   RUBY_VERSION < '2.0' ? '~> 1.3.2'   : '>= 1.3.2'
   gem 'test-unit',        RUBY_VERSION < '1.9' ? '~> 2.0'     : '>= 3.0'

spec/spec_helper.rb

@@ -1,3 +1,6 @@
+require 'simplecov'
+SimpleCov.start
+
 # This file was generated by the `rspec --init` command. Conventionally, all
 # specs live under a `spec` directory, which RSpec adds to the `$LOAD_PATH`.
 # The generated `.rspec` file contains `--require spec_helper` which will cause