IntegrationTest specialization to test rake tasks

tasks_test_helper.rb

require 'rake'

class TasksTest < ActionDispatch::IntegrationTest
  include ActionMailer::TestHelper

  private
  def self.task(t = nil)
    return @task unless t

    t = t.to_s

    @task = Rake::Task[t] rescue nil

    unless @task
      Rails.application.load_tasks

      @task = Rake::Task[t]

      raise "Task \"#{t}\" not found" unless @task
    end

    @task
  end

  def task
    self.class.task
  end

  def run_task!
    task.reenable
    task.execute
  end
end