Rspec accepts_nested_attributes_forのバリデーションテスト

Question

質問内容

accepts_nested_attributes_forでネストしたサブクラスのバリデーションテストはどのように書けばいいでしょうか。
レシピを投稿する際、proceduresとingredientsを一緒に投稿できるようにしています。

Recipeファクトリー

FactoryBot.define do
  factory :recipe do
    association :user
    association :genre
    name {"レシピ"}
    introduction {"レシピ紹介"}
    serving  {"1"}
    recipe_image  { Rack::Test::UploadedFile.new(File.join(File.join(Rails.root, '/spec/fixtures/images/test.jpg'))) }
    after(:build) do |built_recipe|
      built_recipe.procedures << build(:procedure, recipe: built_recipe)
    end
    after(:build) do |built_recipe|
      built_recipe.ingredients << build(:ingredient, recipe: built_recipe)
    end
  end
end

Recipe.rb

class Recipe < ApplicationRecord
  include ActiveModel::Dirty

  has_many	:reviews,	    dependent: :destroy
  has_many	:bookmarks,	  dependent: :destroy
  has_many	:ingredients,	dependent: :destroy
  has_many	:procedures,	dependent: :destroy
  belongs_to	:user, optional: true
  belongs_to	:genre

  attr_accessor :recipe_image_cache

  mount_uploader :recipe_image, RecipeImageUploader

  accepts_nested_attributes_for :ingredients, :procedures, allow_destroy: true

  with_options presence: true do
    validates :serving
    validates :name
    validates :recipe_image
    validates :introduction
    validates :ingredients
  end

Ingredient.rb

class Ingredient < ApplicationRecord
  belongs_to :recipe

  with_options presence: true do
    validates :name
    validates :amount
  end
end

該当のコード

recipe_spec.rb

it "材料名が空欄の場合、無効となる" do
        recipe = build(:recipe)
        #ここでingrdientのnameが空欄の場合以下の結果をテストしたい。
        expect(ingreedient.errors[:name]).to include("が入力されていません。")
      end