Adds rspec

Rakefile

@@ -1,2 +1,8 @@
 #!/usr/bin/env rake
 require "bundler/gem_tasks"
+require "rspec/core/rake_task"
+
+RSpec::Core::RakeTask.new
+
+task :default => :spec
+task :test => :spec

spec/lib/yaml_string_spec.rb

@@ -0,0 +1,7 @@
+require "spec_helper"
+
+describe YamlString do
+  it "should exist" do
+    YamlString.new.should be_a(YamlString)
+  end
+end

spec/spec_helper.rb

@@ -0,0 +1,8 @@
+require 'yaml_string'
+require 'mocha'
+require 'fakefs/spec_helpers'
+
+RSpec.configure do |c|
+  c.mock_with :mocha
+  c.include FakeFS::SpecHelpers, fakefs: true
+end

yaml_string.gemspec

@@ -14,4 +14,8 @@ Gem::Specification.new do |gem|
   gem.name          = "yaml_string"
   gem.require_paths = ["lib"]
   gem.version       = YamlString::VERSION
+
+  gem.add_development_dependency 'fakefs'
+  gem.add_development_dependency 'rake'
+  gem.add_development_dependency 'rspec'
 end