代码之家 › 专栏 › 技术社区 › David Geismar

如何在使用rspec测试类中的任何方法之前初始化常规上下文变量

rspec-rails rspec ruby ruby-on-rails

David Geismar · 技术社区 · 6 年前

我是RSPEC的新手。我正在为一个服务类编写一个测试,我希望在任何描述块中运行之前初始化一组实例。我做的事情如下:

RSpec.describe MyService do
before :each do

    let(:product){create(:product)}
    let(:article_student){ create(:article, targets: [:student], vat_type: vat_type, product: product)} #target student
    let(:article_teacher){ create(:article, targets: [:teacher], vat_type: vat_type, product: product) }#target teacher
    # creer des offres
    let(:offer){create(:offer, target: :student, license_length: :m12)}
    let(:offer_special_cyclic){create(:offer_special, cyclic_amount: true, free_article_id: article_teacher.id, minimum_amount: 10, license_length: :m12)} # free article @article_teacher
    let(:offer_special_non_cyclic){create(:offer_special, cyclic_amount: false, free_article_id: article_teacher.id, minimum_amount: 10, license_length: :m12)} # free article @article_teacher
    let(:order){ create(:order, establishment_account: establis

hment_account)}
end

然后我将有几个描述块(在myservice中测试不同的方法,我希望在每个方法中修改以前在my before中创建的变量:每个块)。例如:

  describe "#create_from_order" do
    subject{ licenses }
    context "first time worker runs" do
      order.already_went_through_license_worker = false
      order.save!
      LicenseService.new.create_from_order(@order.id)
      let(:licenses){ License.where(order_id: @order.id)}
      specify { subject.count.to eq 34 }
      specify { subject.pluck(:is_from_offer_special).count(true).to eq 4}
      specify { subject.pluck(:is_from_offer_special).count(false).to eq 30 }
end
end

但是,当我尝试运行我的测试时,我得到了 order 在我的 context 块未定义…

undefined local variable or method `order' for #<Class:0x007fc689ddfdb8>

我意识到了我的过去:每个代码都是不输入的。实现这一点的好方法是,在测试类中的任何方法之前初始化一组实例变量的常规上下文。

2 回复 | 直到 6 年前

jdno 6 年前

let 声明 before let(:foo) { block } foo 被调用。但是通过将语句包装在

let!

RSpec.describe MyService do
  let!(:product){create(:product)}
  let!(:article_student){ create(:article, targets: [:student], vat_type: vat_type, product: product)} #target student
  let!(:article_teacher){ create(:article, targets: [:teacher], vat_type: vat_type, product: product) } #target teacher
  # creer des offres
  let!(:offer){create(:offer, target: :student, license_length: :m12)}
  let!(:offer_special_cyclic){create(:offer_special, cyclic_amount: true, free_article_id: article_teacher.id, minimum_amount: 10, license_length: :m12)} # free article @article_teacher
  let!(:offer_special_non_cyclic){create(:offer_special, cyclic_amount: false, free_article_id: article_teacher.id, minimum_amount: 10, license_length: :m12)} # free article @article_teacher
  let!(:order){ create(:order, establishment_account: establishment_account)}
end

现在,要修改对象,请使用在上下文中阻塞。确保你没有混合 order @order

context "first time worker runs" do
  before do
    order.already_went_through_license_worker = false
    order.save!
    LicenseService.new.create_from_order(order.id)
  end

  let(:licenses){ License.where(order_id: order.id)}

  specify { subject.count.to eq 34 }
  specify { subject.pluck(:is_from_offer_special).count(true).to eq 4}
  specify { subject.pluck(:is_from_offer_special).count(false).to eq 30 }
end

这应该能解决你的问题。

Onur Kucukkece 6 年前

RSpec.describe MyService do
  describe "#create_from_order" do
    let(:product){create(:product)}
    let(:article_student){ create(:article, targets: [:student], vat_type: vat_type, product: product)} #target student
    let(:article_teacher){ create(:article, targets: [:teacher], vat_type: vat_type, product: product) }#target teacher
    # creer des offres
    let(:offer){create(:offer, target: :student, license_length: :m12)}
    let(:offer_special_cyclic){create(:offer_special, cyclic_amount: true, free_article_id: article_teacher.id, minimum_amount: 10, license_length: :m12)} # free article @article_teacher
    let(:offer_special_non_cyclic){create(:offer_special, cyclic_amount: false, free_article_id: article_teacher.id, minimum_amount: 10, license_length: :m12)} # free article @article_teacher
    let(:order){ create(:order, establishment_account: establishment_account)}

    context "first time worker runs" do
      order.already_went_through_license_worker = false
      order.save!
      LicenseService.new.create_from_order(@order.id)
      let(:licenses){ License.where(order_id: @order.id)}
      specify { subject.count.to eq 34 }
      specify { subject.pluck(:is_from_offer_special).count(true).to eq 4}
      specify { subject.pluck(:is_from_offer_special).count(false).to eq 30 }
    end
  end
end

let 如果只调用对象,则正在运行方法。如果你想让它运行不管什么,你应该使用 let!

希望有帮助