Add specs for `SubscriptionsController`

These are mostly the old `AjaxController::SubscriptionController` specs, but adjusted for Turbo (and the proper action names)

spec/controllers/subscriptions_controller_spec.rb

@@ -2,41 +2,33 @@
 
 require "rails_helper"
 
-describe Ajax::SubscriptionController, :ajax_controller, type: :controller do
+describe SubscriptionsController, type: :controller do
   # need to use a different user here, as after a create the user owning the
   # answer is automatically subscribed to it
   let(:answer_user) { FactoryBot.create(:user) }
   let(:answer) { FactoryBot.create(:answer, user: answer_user) }
+  let(:user) { FactoryBot.create(:user) }
 
-  describe "#subscribe" do
+  describe "#create" do
     let(:params) do
       {
-        answer: answer_id
+        answer: answer_id,
       }
     end
 
-    subject { post(:subscribe, params: params) }
+    subject { post(:create, params:, format: :turbo_stream) }
 
     context "when user is signed in" do
       before(:each) { sign_in(user) }
 
       context "when answer exists" do
         let(:answer_id) { answer.id }
-        let(:expected_response) do
-          {
-            "success" => true,
-            "status" =>  "okay",
-            "message" => anything
-          }
-        end
 
         context "when subscription does not exist" do
           it "creates a subscription on the answer" do
             expect { subject }.to(change { answer.subscriptions.count }.by(1))
             expect(answer.subscriptions.map { |s| s.user.id }.sort).to eq([answer_user.id, user.id].sort)
           end
-
-          include_examples "returns the expected response"
         end
 
         context "when subscription already exists" do
@@ -46,26 +38,15 @@ describe Ajax::SubscriptionController, :ajax_controller, type: :controller do
             expect { subject }.to(change { answer.subscriptions.count }.by(0))
             expect(answer.subscriptions.map { |s| s.user.id }.sort).to eq([answer_user.id, user.id].sort)
           end
-
-          include_examples "returns the expected response"
         end
       end
 
       context "when answer does not exist" do
         let(:answer_id) { "Bielefeld" }
-        let(:expected_response) do
-          {
-            "success" => false,
-            "status" => "not_found",
-            "message" => anything
-          }
-        end
 
         it "does not create a new subscription" do
           expect { subject }.not_to(change { Subscription.count })
         end
-
-        include_examples "returns the expected response"
       end
     end
 
@@ -79,27 +60,20 @@ describe Ajax::SubscriptionController, :ajax_controller, type: :controller do
     end
   end
 
-  describe "#unsubscribe" do
+  describe "#destroy" do
     let(:params) do
       {
-        answer: answer_id
+        answer: answer_id,
       }
     end
 
-    subject { post(:unsubscribe, params: params) }
+    subject { delete(:destroy, params:, format: :turbo_stream) }
 
     context "when user is signed in" do
       before(:each) { sign_in(user) }
 
       context "when answer exists" do
         let(:answer_id) { answer.id }
-        let(:expected_response) do
-          {
-            "success" => true,
-            "status" =>  "okay",
-            "message" => anything
-          }
-        end
 
         context "when subscription exists" do
           before(:each) { Subscription.subscribe(user, answer) }
@@ -108,43 +82,22 @@ describe Ajax::SubscriptionController, :ajax_controller, type: :controller do
             expect { subject }.to(change { answer.subscriptions.count }.by(-1))
             expect(answer.subscriptions.map { |s| s.user.id }.sort).to eq([answer_user.id].sort)
           end
-
-          include_examples "returns the expected response"
         end
 
         context "when subscription does not exist" do
-          let(:expected_response) do
-            {
-              "success" => false,
-              "status" =>  "okay",
-              "message" => anything
-            }
-          end
-
           it "does not modify the answer's subscriptions" do
             expect { subject }.to(change { answer.subscriptions.count }.by(0))
             expect(answer.subscriptions.map { |s| s.user.id }.sort).to eq([answer_user.id].sort)
           end
-
-          include_examples "returns the expected response"
         end
       end
 
       context "when answer does not exist" do
         let(:answer_id) { "Bielefeld" }
-        let(:expected_response) do
-          {
-            "success" => false,
-            "status" => "not_found",
-            "message" => anything
-          }
-        end
 
         it "does not create a new subscription" do
           expect { subject }.not_to(change { Subscription.count })
         end
-
-        include_examples "returns the expected response"
       end
     end