#build_stubbed vs FactoryGirl strategies

bout2.rb

describe "#instance_double VS FactoryGirl.build_stubbed, FactoryGirl.build, and FactoryGirl.create" do
  subject { book.by_bce_autor? }

  bout2_number_of = 200

  context "when setting up with #instance_double" do
    let(:book) { build_stubbed(:book) }
    let(:author) { instance_double("Author", bce?: true) }

    before { allow(book).to receive(:author).and_return(author) }

    bout2_number_of.times do
      it { is_expected.to eq(true) }
    end
  end

  context "when setting up with FactoryGirl.build_stubbed" do
    let(:book) { build_stubbed(:book, :by_bce_author) }

    bout2_number_of.times do
      it { is_expected.to eq(true) }
    end
  end

  context "when setting up with FactoryGirl.build" do
    let(:book) { build(:book, :by_bce_author) }

    bout2_number_of.times do
      it { is_expected.to eq(true) }
    end
  end

  context "when setting up with FactoryGirl.create" do
    let(:book) { create(:book, :by_bce_author) }

    bout2_number_of.times do
      it { is_expected.to eq(true) }
    end
  end
end