Rakefile in mnogootex-0.2.1 vs Rakefile in mnogootex-1.0.0

@@ -1,6 +1,27 @@
-require "bundler/gem_tasks"
-require "rspec/core/rake_task"
+# frozen_string_literal: true
 
-RSpec::Core::RakeTask.new(:spec)
+require 'mutant'
+require 'dry/inflector'
 
-task :default => :spec
+require 'rspec/core/rake_task'
+
+namespace :spec do
+  desc 'run RSpec'
+  RSpec::Core::RakeTask.new(:rspec) do |task|
+    task.rspec_opts = '--format documentation'
+  end
+
+  desc 'run SimpleCov'
+  task :simplecov do
+    ENV['COVERAGE'] = 'true'
+    Rake::Task['spec:rspec'].invoke
+  end
+
+  desc 'run Mutant'
+  task :mutant, [:subject] do |_, args|
+    subjects = [args[:subject]].compact
+    subjects << 'Mnogootex*' if subjects.empty?
+    successful = ::Mutant::CLI.run(%w[--use rspec --fail-fast] + subjects)
+    raise('Mutant task is not successful') unless successful
+  end
+end