rake_task_integration_spec.rb

# Example integration spec for a Rake task in Rails
#
# cat <<EOT > lib/tasks/myapp.rake
# namespace :myapp do
#   task :mytask => :environment do
#     puts "Hello"
#   end
# end
# EOT

require "rails_helper"

describe "Rake tasks" do

  before(:all) do
    Myapp::Application.load_tasks
  end

  describe "myapp:mytask" do

    subject { Rake::Task["myapp:mytask"] }

    specify do
      # Run the rake task and store the output
      output = capture(:stdout) do
        subject.invoke
      end

      expect(output).to match /Hello/
    end

  end

end