使用者必須登入才能建立 course#create

修改 app/contrllers/courses_controller

class CoursesController < ApplicationController
  before_action :authenticate_user!, only: [:new, :create]

運行測試

$ rspec spec/controllers/courses_controller_spec.rb
........FFF..........

Failures:

  1) CoursesController POST create when course doesn't have title render new template
     Failure/Error: expect(response).to render_template("new")
       expecting <"new"> but rendering with <[]>

  2) CoursesController POST create when course has title create a new course record
     Failure/Error:
       expect do
         post :create, params: { course: attributes_for(:course) }
       end.to change { Course.count }.by(1)

       expected result to have changed by 1, but was changed by 0

  3) CoursesController POST create when course has title redirects to courses_path
     Failure/Error: expect(response).to redirect_to courses_path

       Expected response to be a redirect to <http://test.host/courses> but was a redirect to <http://test.host/users/sign_in>.
       Expected "http://test.host/courses" to be === "http://test.host/users/sign_in".

Finished in 0.20329 seconds (files took 1.94 seconds to load)
21 examples, 3 failures

之前通過的場景都不成功了，因為現在需要先登入才可以操作。

修改 spec/controllers/courses_controller_spec.rb 中的 POST create：

describe "POST create" do
  let(:user) { create(:user) } # <--
  before { sign_in user } # <--

  context "when course doesn't have title" do
    it "doesn't create a record" do
      expect do
        post :create, params: { course: { :description => "bar" }}
      end.to change { Course.count }.by(0)
    end

    it "render new template" do
      post :create, params: { course: { :description => "bar" } }

      expect(response).to render_template("new")
    end
  end

  context "when course has title" do
    it "create a new course record" do
      course = build(:course)

      expect do
        post :create, params: { course: attributes_for(:course) }
      end.to change { Course.count }.by(1)
    end

    it "redirects to courses_path" do
      course = build(:course)

      post :create, params:{ course: attributes_for(:course) }

      expect(response).to redirect_to courses_path
    end
  end
end

在所有的測試之前先登入即可。