Fix RSpec/VerifiedDoubles cop (#25469)

spec/controllers/admin/change_emails_controller_spec.rb

@@ -23,7 +23,8 @@ RSpec.describe Admin::ChangeEmailsController do
 
   describe 'GET #update' do
     before do
-      allow(UserMailer).to receive(:confirmation_instructions).and_return(double('email', deliver_later: nil))
+      allow(UserMailer).to receive(:confirmation_instructions)
+        .and_return(instance_double(ActionMailer::MessageDelivery, deliver_later: nil))
     end
 
     it 'returns http success' do

spec/controllers/admin/confirmations_controller_spec.rb

@@ -38,7 +38,7 @@ RSpec.describe Admin::ConfirmationsController do
     let!(:user) { Fabricate(:user, confirmed_at: confirmed_at) }
 
     before do
-      allow(UserMailer).to receive(:confirmation_instructions) { double(:email, deliver_later: nil) }
+      allow(UserMailer).to receive(:confirmation_instructions) { instance_double(ActionMailer::MessageDelivery, deliver_later: nil) }
     end
 
     context 'when email is not confirmed' do

spec/controllers/admin/disputes/appeals_controller_spec.rb

@@ -19,7 +19,8 @@ RSpec.describe Admin::Disputes::AppealsController do
     let(:current_user) { Fabricate(:user, role: UserRole.find_by(name: 'Admin')) }
 
     before do
-      allow(UserMailer).to receive(:appeal_approved).and_return(double('email', deliver_later: nil))
+      allow(UserMailer).to receive(:appeal_approved)
+        .and_return(instance_double(ActionMailer::MessageDelivery, deliver_later: nil))
       post :approve, params: { id: appeal.id }
     end
 
@@ -40,7 +41,8 @@ RSpec.describe Admin::Disputes::AppealsController do
     let(:current_user) { Fabricate(:user, role: UserRole.find_by(name: 'Admin')) }
 
     before do
-      allow(UserMailer).to receive(:appeal_rejected).and_return(double('email', deliver_later: nil))
+      allow(UserMailer).to receive(:appeal_rejected)
+        .and_return(instance_double(ActionMailer::MessageDelivery, deliver_later: nil))
       post :reject, params: { id: appeal.id }
     end
 

spec/controllers/admin/domain_allows_controller_spec.rb

@@ -37,7 +37,7 @@ RSpec.describe Admin::DomainAllowsController do
 
   describe 'DELETE #destroy' do
     it 'disallows the domain' do
-      service = double(call: true)
+      service = instance_double(UnallowDomainService, call: true)
       allow(UnallowDomainService).to receive(:new).and_return(service)
       domain_allow = Fabricate(:domain_allow)
       delete :destroy, params: { id: domain_allow.id }

spec/controllers/admin/domain_blocks_controller_spec.rb

@@ -213,7 +213,7 @@ RSpec.describe Admin::DomainBlocksController do
 
   describe 'DELETE #destroy' do
     it 'unblocks the domain' do
-      service = double(call: true)
+      service = instance_double(UnblockDomainService, call: true)
       allow(UnblockDomainService).to receive(:new).and_return(service)
       domain_block = Fabricate(:domain_block)
       delete :destroy, params: { id: domain_block.id }