Why is my rake task running twice in my test?

Question

I have a rake task test that I setup following the only examples I could find online.

It looks like this:

require \'test_helper\'
require \'minitest/         


        

Answer 1

A solution that works for testing the tasks of a Gem that has been made a Railtie so it can add tasks to the Rails app:

Don't define the Railtie in test mode when you're also defining a Rails::Application class in spec_helper.rb (which allows your tests to call Rails.application.load_tasks). Otherwise the Rake file will be loaded once as a Railtie and once as an Engine:

class Railtie < Rails::Railtie
  rake_tasks do
    load 'tasks/mygem.rake'
  end
end unless Rails.env.test? # Without this condition tasks under test are run twice

Another solution would be to put a condition in the Rake file to skip the task definitions if the file has already been loaded.