Fixed Rails Save Bang offenses in few spec/models/* files

.rubocop_manual_todo.yml

@@ -165,9 +165,6 @@ Rails/SaveBang:
     - 'spec/lib/gitlab/middleware/go_spec.rb'
     - 'spec/lib/gitlab/shard_health_cache_spec.rb'
     - 'spec/mailers/notify_spec.rb'
-    - 'spec/models/appearance_spec.rb'
-    - 'spec/models/application_record_spec.rb'
-    - 'spec/models/application_setting_spec.rb'
     - 'spec/models/clusters/applications/helm_spec.rb'
     - 'spec/models/container_repository_spec.rb'
     - 'spec/models/design_management/version_spec.rb'

spec/models/appearance_spec.rb

@@ -15,7 +15,7 @@ RSpec.describe Appearance do
       create(:appearance)
 
       new_row = build(:appearance)
-      new_row.save
+      expect { new_row.save! }.to raise_error(ActiveRecord::RecordInvalid, 'Validation failed: Only 1 appearances row can exist')
 
       expect(new_row.valid?).to eq(false)
     end
@@ -39,7 +39,7 @@ RSpec.describe Appearance do
     end
 
     it 'returns the path when the upload has been orphaned' do
-      appearance.send(logo_type).upload.destroy
+      appearance.send(logo_type).upload.destroy!
       appearance.reload
 
       expect(appearance.send("#{logo_type}_path")).to eq(expected_path)

spec/models/application_record_spec.rb

@@ -13,20 +13,23 @@ RSpec.describe ApplicationRecord do
 
   describe '.safe_ensure_unique' do
     let(:model) { build(:suggestion) }
+    let_it_be(:note) { create(:diff_note_on_merge_request) }
     let(:klass) { model.class }
 
     before do
-      allow(model).to receive(:save).and_raise(ActiveRecord::RecordNotUnique)
+      allow(model).to receive(:save!).and_raise(ActiveRecord::RecordNotUnique)
     end
 
     it 'returns false when ActiveRecord::RecordNotUnique is raised' do
-      expect(model).to receive(:save).once
-      expect(klass.safe_ensure_unique { model.save }).to be_falsey
+      expect(model).to receive(:save!).once
+      model.note_id = note.id
+      expect(klass.safe_ensure_unique { model.save! }).to be_falsey
     end
 
     it 'retries based on retry count specified' do
-      expect(model).to receive(:save).exactly(3).times
-      expect(klass.safe_ensure_unique(retries: 2) { model.save }).to be_falsey
+      expect(model).to receive(:save!).exactly(3).times
+      model.note_id = note.id
+      expect(klass.safe_ensure_unique(retries: 2) { model.save! }).to be_falsey
     end
   end
 

spec/models/application_setting_spec.rb

@@ -252,7 +252,9 @@ RSpec.describe ApplicationSetting do
 
     context "when user accepted let's encrypt terms of service" do
       before do
-        setting.update(lets_encrypt_terms_of_service_accepted: true)
+        expect {
+          setting.update!(lets_encrypt_terms_of_service_accepted: true)
+        }.to raise_error(ActiveRecord::RecordInvalid, "Validation failed: Lets encrypt notification email can't be blank")
       end
 
       it { is_expected.not_to allow_value(nil).for(:lets_encrypt_notification_email) }
@@ -302,26 +304,30 @@ RSpec.describe ApplicationSetting do
 
     describe 'default_artifacts_expire_in' do
       it 'sets an error if it cannot parse' do
-        setting.update(default_artifacts_expire_in: 'a')
+        expect {
+          setting.update!(default_artifacts_expire_in: 'a')
+        }.to raise_error(ActiveRecord::RecordInvalid, "Validation failed: Default artifacts expire in is not a correct duration")
 
         expect_invalid
       end
 
       it 'sets an error if it is blank' do
-        setting.update(default_artifacts_expire_in: ' ')
+        expect {
+          setting.update!(default_artifacts_expire_in: ' ')
+        }.to raise_error(ActiveRecord::RecordInvalid, "Validation failed: Default artifacts expire in can't be blank")
 
         expect_invalid
       end
 
       it 'sets the value if it is valid' do
-        setting.update(default_artifacts_expire_in: '30 days')
+        setting.update!(default_artifacts_expire_in: '30 days')
 
         expect(setting).to be_valid
         expect(setting.default_artifacts_expire_in).to eq('30 days')
       end
 
       it 'sets the value if it is 0' do
-        setting.update(default_artifacts_expire_in: '0')
+        setting.update!(default_artifacts_expire_in: '0')
 
         expect(setting).to be_valid
         expect(setting.default_artifacts_expire_in).to eq('0')
@@ -400,18 +406,18 @@ RSpec.describe ApplicationSetting do
     context 'auto_devops_domain setting' do
       context 'when auto_devops_enabled? is true' do
         before do
-          setting.update(auto_devops_enabled: true)
+          setting.update!(auto_devops_enabled: true)
         end
 
         it 'can be blank' do
-          setting.update(auto_devops_domain: '')
+          setting.update!(auto_devops_domain: '')
 
           expect(setting).to be_valid
         end
 
         context 'with a valid value' do
           before do
-            setting.update(auto_devops_domain: 'domain.com')
+            setting.update!(auto_devops_domain: 'domain.com')
           end
 
           it 'is valid' do
@@ -421,7 +427,9 @@ RSpec.describe ApplicationSetting do
 
         context 'with an invalid value' do
           before do
-            setting.update(auto_devops_domain: 'definitelynotahostname')
+            expect {
+              setting.update!(auto_devops_domain: 'definitelynotahostname')
+            }.to raise_error(ActiveRecord::RecordInvalid, "Validation failed: Auto devops domain is not a fully qualified domain name")
           end
 
           it 'is invalid' do