如何干掉同一控制器中不同操作共享的 RSpec 测试答案

【问题标题】：How to DRY up RSpec tests shared by different actions in same controller如何干掉同一控制器中不同操作共享的 RSpec 测试
【发布时间】：2011-09-23 01:02:14
【问题描述】：

我有以下测试，我想通过同一个控制器中的各种操作进行测试。我怎样才能把它弄干？在下面的 cmets 中，您会看到测试应该调用不同的方法和操作，具体取决于我正在测试的操作。

shared_examples_for "preparing for edit partial" do

  it "creates a new staff vacation" do
    StaffVacation.should_receive(:new)
    get :new
  end

  it "assigns @first_day_of_week" do
    get :new
    assigns(:first_day_of_week).should == 1
  end

end


describe "GET new" do
  # i want to use 'it_behaves_like "preparing for edit partial"'
  # and it should use 'get :new'
end

describe "GET edit" do
  # i want to use 'it_behaves_like "preparing for edit partial"'
  # but it should use 'get :edit' instead
end

describe "POST create" do
  # on unsuccessful save, i want to use 'it_behaves_like "preparing for edit partial"'
  # but it should use 'post :create' instead
end

【问题讨论】：

标签： ruby-on-rails rspec

【解决方案1】：

你可以这样做：

shared_examples_for "preparing for edit partial" do
  let(:action){ get :new }

  it "creates a new staff vacation" do
    StaffVacation.should_receive(:new)
    action
  end

  it "assigns @first_day_of_week" do
    action
    assigns(:first_day_of_week).should == 1
  end
end

context 'GET new' do
  it_should_behave_like 'preparing for edit partial' do
    let(:action){ get :new }
  end
end

context 'GET edit' do
  it_should_behave_like 'preparing for edit partial' do
    let(:action){ get :edit }
  end
end

context 'POST create' do
  it_should_behave_like 'preparing for edit partial' do
    let(:action){ post :create }
  end
end

或者，您可以在示例中使用某种循环：

['get :new', 'get :edit', 'post :create'].each do |action|
  context action do
    it "creates a new staff vacation" do
      StaffVacation.should_receive(:new)
      eval(action)
    end

    it "assigns @first_day_of_week" do
      eval(action)
      assigns(:first_day_of_week).should == 1
    end
  end
end

【讨论】：

【解决方案2】：

一个选项可能是提供一个模块混合，其中包含一个包含您的规范的方法。

include Auth # This is your module with your generalized spec inside a method

it "redirects without authentication" do
  unauthorized_redirect("get", "new")
end

然后，在我们的方法中，我们可以通过不同类型的授权循环：

module Auth
  def unauthorized_redirect(request, action)
    [nil, :viewer, :editor].each do |a| 
      with_user(a) do
        eval "#{request} :#{action}"
        response.should redirect_to login_path
        # whatever other expectations
      end
    end 
  end
end

【讨论】：