使用 before 整理

我們也注意到

sign_in user 與 get :new 也一直重複出現。

其實我們可以用 before 來整理。

按照下面的 diff 修改 spec/controllers/courses_controller_spec.rb：

diff --git a/spec/controllers/courses_controller_spec.rb b/spec/controllers/courses_controller_spec.rb
index a8c083e..8aff020 100644
--- a/spec/controllers/courses_controller_spec.rb
+++ b/spec/controllers/courses_controller_spec.rb
@@ -44,17 +44,16 @@ RSpec.describe CoursesController, type: :controller do
       let(:user) { create(:user) }
       let(:course) { build(:course) }

-      it "assigns @course" do
+      before do
         sign_in user
         get :new
+      end

+      it "assigns @course" do
         expect(assigns(:course)).to be_a_new(Course)
       end

       it "renders template" do
-        sign_in user
-        get :new
-
         expect(response).to render_template("new")
       end
     end