Improve specs having subqueries

spec/services/bulk_create_integration_service_spec.rb

@@ -5,12 +5,14 @@ require 'spec_helper'
 RSpec.describe BulkCreateIntegrationService do
   include JiraServiceHelper
 
-  before do
+  before_all do
     stub_jira_service_test
   end
 
-  let_it_be(:instance_integration) { create(:jira_service, :instance) }
-  let_it_be(:template_integration) { create(:jira_service, :template) }
+  let_it_be(:excluded_group) { create(:group) }
+  let_it_be(:excluded_project) { create(:project, group: excluded_group) }
+  let(:instance_integration) { create(:jira_service, :instance) }
+  let(:template_integration) { create(:jira_service, :template) }
   let(:excluded_attributes) { %w[id project_id group_id inherit_from_id instance template created_at updated_at] }
 
   shared_examples 'creates integration from batch ids' do
@@ -46,15 +48,19 @@ RSpec.describe BulkCreateIntegrationService do
       described_class.new(integration, batch, association).execute
 
       expect(project.reload.has_external_issue_tracker).to eq(true)
+      expect(excluded_project.reload.has_external_issue_tracker).to eq(false)
     end
 
     context 'with an external wiki integration' do
-      let(:integration) { create(:external_wiki_service, :instance) }
+      before do
+        integration.update!(category: 'common', type: 'ExternalWikiService')
+      end
 
       it 'updates projects#has_external_wiki for external wiki services' do
         described_class.new(integration, batch, association).execute
 
         expect(project.reload.has_external_wiki).to eq(true)
+        expect(excluded_project.reload.has_external_wiki).to eq(false)
       end
     end
   end
@@ -77,14 +83,14 @@ RSpec.describe BulkCreateIntegrationService do
     end
   end
 
-  context 'with an instance-level integration' do
+  context 'passing an instance-level integration' do
     let(:integration) { instance_integration }
     let(:inherit_from_id) { integration.id }
 
     context 'with a project association' do
       let!(:project) { create(:project) }
       let(:created_integration) { project.jira_service }
-      let(:batch) { Project.without_integration(integration) }
+      let(:batch) { Project.where(id: project.id) }
       let(:association) { 'project' }
 
       it_behaves_like 'creates integration from batch ids'
@@ -101,36 +107,52 @@ RSpec.describe BulkCreateIntegrationService do
     end
 
     context 'with a group association' do
-      let_it_be(:group) { create(:group) }
+      let!(:group) { create(:group) }
       let(:created_integration) { Service.find_by(group: group) }
-      let(:batch) { Group.all }
+      let(:batch) { Group.where(id: group.id) }
       let(:association) { 'group' }
 
       it_behaves_like 'creates integration from batch ids'
       it_behaves_like 'updates inherit_from_id'
+    end
+  end
 
-      context 'with a subgroup association' do
-        let_it_be(:group_integration) { create(:jira_service, group: group, project: nil, inherit_from_id: instance_integration.id) }
-        let_it_be(:subgroup) { create(:group, parent: group) }
-        let(:integration) { group_integration }
-        let(:created_integration) { Service.find_by(group: subgroup) }
-        let(:batch) { Group.all }
-        let(:association) { 'group' }
-        let(:inherit_from_id) { instance_integration.id }
-
-        it_behaves_like 'creates integration from batch ids'
-        it_behaves_like 'updates inherit_from_id'
-      end
+  context 'passing a group integration' do
+    let_it_be(:group) { create(:group) }
+
+    context 'with a project association' do
+      let!(:project) { create(:project, group: group) }
+      let(:integration) { create(:jira_service, group: group, project: nil) }
+      let(:created_integration) { project.jira_service }
+      let(:batch) { Project.where(id: Project.minimum(:id)..Project.maximum(:id)).without_integration(integration).in_namespace(integration.group.self_and_descendants) }
+      let(:association) { 'project' }
+      let(:inherit_from_id) { integration.id }
+
+      it_behaves_like 'creates integration from batch ids'
+      it_behaves_like 'updates inherit_from_id'
+      it_behaves_like 'updates project callbacks'
+    end
+
+    context 'with a group association' do
+      let!(:subgroup) { create(:group, parent: group) }
+      let(:integration) { create(:jira_service, group: group, project: nil, inherit_from_id: instance_integration.id) }
+      let(:created_integration) { Service.find_by(group: subgroup) }
+      let(:batch) { Group.where(id: subgroup.id) }
+      let(:association) { 'group' }
+      let(:inherit_from_id) { instance_integration.id }
+
+      it_behaves_like 'creates integration from batch ids'
+      it_behaves_like 'updates inherit_from_id'
     end
   end
 
-  context 'with a template integration' do
+  context 'passing a template integration' do
     let(:integration) { template_integration }
 
     context 'with a project association' do
       let!(:project) { create(:project) }
       let(:created_integration) { project.jira_service }
-      let(:batch) { Project.all }
+      let(:batch) { Project.where(id: project.id) }
       let(:association) { 'project' }
       let(:inherit_from_id) { integration.id }