Use ActiveMailer api to send emails

#186

spec/mailers/domain_delete_mailer_spec.rb

@@ -42,7 +42,7 @@ RSpec.describe DomainDeleteMailer do
     end
 
     it 'sends message' do
-      expect { message.deliver! }.to change { ActionMailer::Base.deliveries.count }.by(1)
+      expect { message.deliver_now }.to change { ActionMailer::Base.deliveries.count }.by(1)
     end
   end
 
@@ -76,7 +76,7 @@ RSpec.describe DomainDeleteMailer do
     end
 
     it 'sends message' do
-      expect { message.deliver! }.to change { ActionMailer::Base.deliveries.count }.by(1)
+      expect { message.deliver_now }.to change { ActionMailer::Base.deliveries.count }.by(1)
     end
   end
 end

spec/mailers/registrant_change_mailer_spec.rb

@@ -46,7 +46,7 @@ RSpec.describe RegistrantChangeMailer do
     end
 
     it 'sends message' do
-      expect { message.deliver! }.to change { ActionMailer::Base.deliveries.count }.by(1)
+      expect { message.deliver_now }.to change { ActionMailer::Base.deliveries.count }.by(1)
     end
   end
 
@@ -90,7 +90,7 @@ RSpec.describe RegistrantChangeMailer do
     end
 
     it 'sends message' do
-      expect { message.deliver! }.to change { ActionMailer::Base.deliveries.count }.by(1)
+      expect { message.deliver_now }.to change { ActionMailer::Base.deliveries.count }.by(1)
     end
   end
 
@@ -130,7 +130,7 @@ RSpec.describe RegistrantChangeMailer do
     end
 
     it 'sends message' do
-      expect { message.deliver! }.to change { ActionMailer::Base.deliveries.count }.by(1)
+      expect { message.deliver_now }.to change { ActionMailer::Base.deliveries.count }.by(1)
     end
   end
 
@@ -170,7 +170,7 @@ RSpec.describe RegistrantChangeMailer do
     end
 
     it 'sends message' do
-      expect { message.deliver! }.to change { ActionMailer::Base.deliveries.count }.by(1)
+      expect { message.deliver_now }.to change { ActionMailer::Base.deliveries.count }.by(1)
     end
   end
 end