Starts measuring code coverage with coveralls

Author: satoryu

.gitignore

@@ -4,3 +4,4 @@ Gemfile.lock
 pkg/*
 doc/
 vendor/
+coverage/

docx.gemspec

@@ -10,12 +10,13 @@ Gem::Specification.new do |s|
   s.authors     = ['Christopher Hunt', 'Marcus Ortiz', 'Higgins Dragon', 'Toms Mikoss', 'Sebastian Wittenkamp']
   s.email       = ['chrahunt@gmail.com']
   s.homepage    = 'https://github.com/chrahunt/docx'
-  s.files       = Dir["README.md", "LICENSE.md", "lib/**/*.rb"]
+  s.files       = Dir['README.md', 'LICENSE.md', 'lib/**/*.rb']
   s.required_ruby_version = '>= 2.4.0'
 
   s.add_dependency 'nokogiri', '~> 1.10', '>= 1.10.4'
   s.add_dependency 'rubyzip',  '~> 2.0'
 
-  s.add_development_dependency 'rspec', '~> 3.7'
+  s.add_development_dependency 'coveralls', '~> 0.8'
   s.add_development_dependency 'rake', '~> 13.0'
+  s.add_development_dependency 'rspec', '~> 3.7'
 end

spec/docx/document_spec.rb

@@ -1,3 +1,6 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
 require 'docx'
 require 'tempfile'
 

spec/spec_helper.rb

@@ -1,3 +1,11 @@
+# frozen_string_literal: true
+
+if ENV['COVERALLS_REPO_TOKEN']
+  require 'coveralls'
+
+  Coveralls.wear!
+end
+
 # This file was generated by the `rspec --init` command. Conventionally, all
 # specs live under a `spec` directory, which RSpec adds to the `$LOAD_PATH`.
 # Require this file using `require "spec_helper"` to ensure that it is only
@@ -8,7 +16,7 @@
   config.treat_symbols_as_metadata_keys_with_true_values = true
   config.run_all_when_everything_filtered = true
   config.filter_run :focus
-  
+
   # Run specs in random order to surface order dependencies. If you find an
   # order dependency and want to debug it, you can fix the order by providing
   # the seed, which is printed after each run.