RSpec:为什么不让工作，但在(:each)之前?

I have the current spec:

我有目前的规格:

describe "DELETE 'destroy'" do
  let(:client) { create(:client) }

  #before(:each) do
    #@client = create(:client)
  #end

  it "should delete a client" do
    expect {
      delete :destroy, :id => client
    }.to change(Client, :count).by(-1)
  end

  # ...

end
describe