Rakefile in landrush-0.18.0 vs Rakefile in landrush-0.19.0

@@ -1,14 +1,19 @@
 require 'bundler/gem_tasks'
-
 require 'rake/testtask'
+require 'rubocop/rake_task'
 
 Rake::TestTask.new do |t|
-  t.pattern = "test/**/*_test.rb"
+  t.pattern = 'test/**/*_test.rb'
   t.libs << 'test'
 end
 
-task :default => :test
+task default: [
+  :rubocop,
+  :test
+]
 
 task :generate_diagrams do
-  sh "cd doc; seqdiag --fontmap=support/seqdiag.fontmap -Tsvg vagrant_dns_without_landrush.diag"
+  sh 'cd doc; seqdiag --fontmap=support/seqdiag.fontmap -Tsvg vagrant_dns_without_landrush.diag'
 end
+
+RuboCop::RakeTask.new