将此RSpec位代码重构为新语法

Question

你会如何使用3.0 RSpec'expect'语法重构这段测试代码？

it "should destroy the micropost" do
  lambda do
    delete :destroy, :id => @micropost
    flash[:success].should =~ /deleted/i
    response.should redirect_to(root_path)
  end.should change(Micropost, :count).by(-1)
end

Answer 1

it "destroys the micropost" do
  expect {
    delete :destroy, :id => @micropost
    expect(flash[:success]).to match /deleted/i
    expect(response).to redirect_to(root_path)
  }.to change(Micropost, :count).by(-1)
end

来源：redirect_to，match and change