我怎樣寫這個使用RSpec

Question

我升級我的版本的RSpec的到最新的版本，我有測試斷裂有類似的語法

it "should delete a company" do 
    expect { click_link "Delete Company" }.should change(Company, :count).by(-1) 
end 

我看着documentation，我看不到任何會做到這一點在目前的優化版本...如何實現這個

我得到的錯誤任何想法是

9) Company Pages Edit page as an admin user should delete a company 
    Failure/Error: expect { click_link "Delete Company" }.should change(Company, :count).by(-1) 
    NoMethodError: 
    undefined method `call' for #<RSpec::Expectations::ExpectationTarget:0x007fccafdfc360> 
    # ./spec/requests/companies_spec.rb:79:in `block (3 levels) in <top (required)>' 

Answer 1

這裏的doc使用expectatio NS

it "should delete a company" do 
    expect { click_link "Delete Company" }.to change{Company.count}.by(-1) 
end 

請注意以下更改

1. should成爲to
2. (Company, :count)成爲{Company.count}