如何使用rspec在rails 3中傳遞到控制器中的參數？

Question

我們的代碼：

describe "GET show" do 
    it "assigns the requested subcategory as @subcategory" do 
    subcategory = Subcategory.create! valid_attributes 
    get :show, :id => subcategory.id.to_s 
    assigns(:subcategory).should eq(subcategory) 
    end 

    it "has a sort parameter in the url" do 
    subcategory = Subcategory.create! valid_attributes 
    get :show, {:id => subcategory.id.to_s, :params => {:sort => 'title'}} 
    helper.params[:sort].should_not be_nil 
    end 
end 

，我得到了以下錯誤消息：

1) SubcategoriesController GET show has a sort parameter in the url 
    Failure/Error: helper.params[:sort].should_not be_nil 
    NameError: 
     undefined local variable or method `helper' for #<RSpec::Core::ExampleGroup::Nested_4::Nested_2:0x007f81a467c848> 
    # ./spec/controllers/subcategories_controller_spec.rb:54:in `block (3 levels) in <top (required)>' 

我怎樣才能在rspec的測試PARAMS？

Answer 1

get :show, {:id => subcategory.id.to_s, :params => {:sort => 'title'}} 

應該

get :show, :id => subcategory.id.to_s, :sort => 'title' 

除非你的意思是通過params[:params][:sort]。

而且

helper.params[:sort].should_not be_nil 

應該

controller.params[:sort].should_not be_nil 
controller.params[:sort].should eql 'title' 

（如果你的意思是測試一個幫手，你應該寫一個幫手規格）