mutant rake script

mutant.rake

# encoding: utf-8

# Eager load application and dependencies
require File.expand_path('../../../config/environment', __FILE__)

Rails.application.eager_load!

# All classes to mutate
classes = ActiveSupport::Dependencies.autoloaded_constants.
  map(&:constantize).grep(Class).map(&:name)

# Remove classes that should not be mutation covered
classes -= %w[ InheritedResources::Base ]

# Load all rake tasks
Rake.application.load_imports

# Remove metrics:mutant from devtools
task('metrics:mutant').clear

namespace :metrics do
  require 'mutant'

  desc 'Run mutant'
  task :mutant do
    p classes
    status = Mutant::CLI.run([*classes, '--rspec'])
    if status.nonzero?
      raise 'Mutant task is not successful'
    end
  end
end