move subscribe to its own controller, add authorization, test subscribe/unsubscribe

spec/controllers/subscriptions_controller_spec.rb

@@ -0,0 +1,53 @@
+require 'spec_helper'
+
+describe SubscriptionsController do
+  let(:conference) { create(:conference) }
+  let(:user) { create(:user) }
+
+  describe 'POST #create' do
+    context 'when user is a guest' do
+      it 'redirects to sign in page' do
+        post :create, conference_id: conference.short_title
+        expect(response).to redirect_to new_user_session_path
+      end
+    end
+
+    context 'when user is signed in' do
+      before(:each) do
+        sign_in(user)
+      end
+
+      it 'redirects to home page' do
+        post :create, conference_id: conference.short_title
+        expect(response).to redirect_to root_path
+      end
+
+      it 'shows success message in flash notice' do
+        post :create, conference_id: conference.short_title
+        expect(flash[:notice]).to match("You have been subscribed to receive email notifications for #{conference.short_title}")
+      end
+
+      it 'subscribes user to conference' do
+        post :create, conference_id: conference.short_title
+        expect(user.subscriptions.pluck(:conference_id)).to include(conference.id)
+      end
+    end
+  end
+
+  describe 'DELETE #destroy' do
+    before(:each) do
+      sign_in(user)
+      post :create, conference_id: conference.short_title
+    end
+
+    it 'redirects to home page' do
+      delete :destroy, conference_id: conference.short_title
+      expect(response).to redirect_to root_path
+    end
+
+    it 'shows success message in flash notice' do
+      delete :destroy, conference_id: conference.short_title
+        expect(flash[:notice]).to match("You have been unsubscribed and now you will not be receiving email notifications for #{conference.short_title}.")
+    end
+  end
+end