Clarify scope for AtomicInternalId shared spec

spec/models/ci/pipeline_spec.rb

@@ -39,6 +39,7 @@ describe Ci::Pipeline, :mailer do
     it_behaves_like 'AtomicInternalId' do
       let(:internal_id_attribute) { :iid }
       let(:instance) { build(:ci_pipeline) }
+      let(:scope) { :project }
       let(:scope_attrs) { { project: instance.project } }
       let(:usage) { :ci_pipelines }
       let(:allow_nil) { true }

spec/models/deployment_spec.rb

@@ -20,6 +20,7 @@ describe Deployment do
     it_behaves_like 'AtomicInternalId' do
       let(:internal_id_attribute) { :iid }
       let(:instance) { build(:deployment) }
+      let(:scope) { :project }
       let(:scope_attrs) { { project: instance.project } }
       let(:usage) { :deployments }
     end

spec/models/issue_spec.rb

@@ -17,6 +17,7 @@ describe Issue do
     it_behaves_like 'AtomicInternalId' do
       let(:internal_id_attribute) { :iid }
       let(:instance) { build(:issue) }
+      let(:scope) { :project }
       let(:scope_attrs) { { project: instance.project } }
       let(:usage) { :issues }
     end

spec/models/merge_request_spec.rb

@@ -25,6 +25,7 @@ describe MergeRequest do
     it_behaves_like 'AtomicInternalId' do
       let(:internal_id_attribute) { :iid }
       let(:instance) { build(:merge_request) }
+      let(:scope) { :target_project }
       let(:scope_attrs) { { project: instance.target_project } }
       let(:usage) { :merge_requests }
     end

spec/models/milestone_spec.rb

@@ -6,6 +6,7 @@ describe Milestone do
       it_behaves_like 'AtomicInternalId' do
         let(:internal_id_attribute) { :iid }
         let(:instance) { build(:milestone, project: build(:project), group: nil) }
+        let(:scope) { :project }
         let(:scope_attrs) { { project: instance.project } }
         let(:usage) { :milestones }
       end
@@ -15,6 +16,7 @@ describe Milestone do
       it_behaves_like 'AtomicInternalId' do
         let(:internal_id_attribute) { :iid }
         let(:instance) { build(:milestone, project: nil, group: build(:group)) }
+        let(:scope) { :group }
         let(:scope_attrs) { { namespace: instance.group } }
         let(:usage) { :milestones }
       end

spec/support/shared_examples/models/atomic_internal_id_spec.rb

@@ -12,16 +12,16 @@ shared_examples_for 'AtomicInternalId' do
 
     describe 'Validation' do
       before do
-        allow_any_instance_of(described_class).to receive(:"ensure_#{scope_attrs.keys.first}_#{internal_id_attribute}!") {}
+        allow_any_instance_of(described_class).to receive(:"ensure_#{scope}_#{internal_id_attribute}!") {}
       end
 
       it 'validates presence' do
         instance.valid?
 
         if allow_nil
-          expect(instance.errors[:iid]).to be_empty
+          expect(instance.errors[internal_id_attribute]).to be_empty
         else
-          expect(instance.errors[:iid]).to include("can't be blank")
+          expect(instance.errors[internal_id_attribute]).to include("can't be blank")
         end
       end
     end