scinote-web/spec/support/permission_helpers.rb

module PermissionHelpers
  def create_user_assignment(object, role, user, assigned_by = nil)

    unless UserAssignment.where(assignable: object, user: user, user_role: role).any?
      create :user_assignment,
             assignable: object,
             user: user,
             user_role: role,
             assigned_by: assigned_by || user
    end

    case object
    when MyModule
      create_user_assignment(object.experiment, role, user, assigned_by)
    when Experiment
      create_user_assignment(object.project, role, user, assigned_by)
    end
  end
end