install simplecov and coveralls

.coveralls.yml

@@ -0,0 +1 @@
+repo_token: GLVOxmX7c87TUUYnsfPdh1JcvxwjSlFjP

Gemfile

@@ -2,3 +2,8 @@ source 'https://rubygems.org'
 
 # Specify your gem's dependencies in jancode.gemspec
 gemspec
+
+group :test do
+  gem 'coveralls', require: false
+  gem 'simplecov', require: false
+end

spec/jancode/gtin13_spec.rb

@@ -0,0 +1,8 @@
+require "spec_helper"
+
+describe Jancode::GTIN13 do
+  it "create GTIN13 code" do
+    jancode = Jancode::GTIN13.new("456995111", "617")
+    expect(jancode.create).to eq("4569951116179")
+  end
+end

spec/spec_helper.rb

@@ -0,0 +1,19 @@
+require "simplecov"
+require "coveralls"
+Coveralls.wear!
+
+SimpleCov.formatter = SimpleCov::Formatter::MultiFormatter[
+  SimpleCov::Formatter::HTMLFormatter,
+  Coveralls::SimpleCov::Formatter
+]
+
+SimpleCov.start do
+  add_filter "spec"
+  add_filter ".bundle"
+end
+
+require "jancode"
+
+RSpec.configure do |config|
+  config.order = "random"
+end