Fix Groups#index

もともとgroups/index.html.slimではcurrent_userのgroupsしか表示されていなかった
にもかかわらず、Groups#indexではGroup.allで全グループを取得していた

current_user.groupsのみを取得するようにした

app/controllers/groups_controller.rb

@@ -7,7 +7,7 @@ class GroupsController < ApplicationController
   authorize_resource
 
   def index
-    @groups = Group.all
+    @groups = current_user.groups
   end
 
   def new

app/views/groups/index.html.slim

@@ -5,7 +5,7 @@
     h1
       'Groups
     ul#groups
-      - current_user.groups.each do |group|
+      - @groups.each do |group|
         = render "group", group: group
 
 

spec/controllers/groups_controller_spec.rb

@@ -14,7 +14,23 @@
       sign_in user
       get :index
     end
+
     it { is_expected.to render_template :index }
+
+    context 'when user has 2 memberships' do
+      before do
+        FactoryBot.create_list(:membership, 2, user: user)
+        FactoryBot.create_list(:membership, 2, user: other)
+      end
+
+      it 'has 2 groups' do
+        expect(assigns(:groups).count).to eq 2
+      end
+
+      it 'has current user groups only' do
+        expect(assigns(:groups).pluck(:user_id)).to be_all(user.id)
+      end
+    end
   end
 
   describe 'GET new' do