Remove code related to object hierarchy in MySQL

These are not required because MySQL is not
supported anymore

spec/helpers/groups_helper_spec.rb

@@ -86,7 +86,7 @@ describe GroupsHelper do
     end
   end
-  describe 'group_title', :nested_groups do
+  describe 'group_title' do
     let(:group) { create(:group) }
     let(:nested_group) { create(:group, parent: group) }
     let(:deep_nested_group) { create(:group, parent: nested_group) }
@@ -99,7 +99,7 @@ describe GroupsHelper do
   end
   # rubocop:disable Layout/SpaceBeforeComma
-  describe '#share_with_group_lock_help_text', :nested_groups do
+  describe '#share_with_group_lock_help_text' do
     let!(:root_group) { create(:group) }
     let!(:subgroup) { create(:group, parent: root_group) }
     let!(:sub_subgroup) { create(:group, parent: subgroup) }
@@ -230,7 +230,7 @@ describe GroupsHelper do
     end
   end
-  describe 'parent_group_options', :nested_groups do
+  describe 'parent_group_options' do
     let(:current_user) { create(:user) }
     let(:group) { create(:group, name: 'group') }
     let(:group2) { create(:group, name: 'group2') }

spec/helpers/namespaces_helper_spec.rb

 require 'spec_helper'
-describe NamespacesHelper, :postgresql do
+describe NamespacesHelper do
   let!(:admin) { create(:admin) }
   let!(:admin_project_creation_level) { nil }
   let!(:admin_group) do
@@ -109,7 +109,7 @@ describe NamespacesHelper, :postgresql do
       expect(options).to include(user_group.name)
     end
-    context 'when nested groups are available', :nested_groups do
+    context 'when nested groups are available' do
       it 'includes groups nested in groups the user can administer' do
         allow(helper).to receive(:current_user).and_return(user)
         child_group = create(:group, :private, parent: user_group)

spec/lib/banzai/filter/milestone_reference_filter_spec.rb

@@ -363,7 +363,7 @@ describe Banzai::Filter::MilestoneReferenceFilter do
       expect(doc.css('a')).to be_empty
     end
-    it 'supports parent group references', :nested_groups do
+    it 'supports parent group references' do
       milestone.update!(group: parent_group)
       doc = reference_filter("See #{reference}")
@@ -396,7 +396,7 @@ describe Banzai::Filter::MilestoneReferenceFilter do
     context 'when group milestone' do
       let(:group_milestone) { create(:milestone, title: 'group_milestone', group: group) }
-      context 'for subgroups', :nested_groups do
+      context 'for subgroups' do
         let(:sub_group) { create(:group, parent: group) }
         let(:sub_group_milestone) { create(:milestone, title: 'sub_group_milestone', group: sub_group) }

spec/lib/gitlab/background_migration/fix_cross_project_label_links_spec.rb

@@ -75,7 +75,7 @@ describe Gitlab::BackgroundMigration::FixCrossProjectLabelLinks, :migration, sch
         create_resource(target_type, 1, 2)
       end
-      it 'ignores label links referencing ancestor group labels', :nested_groups do
+      it 'ignores label links referencing ancestor group labels' do
         labels_table.create(id: 4, title: 'bug', color: 'red', project_id: 2, type: 'ProjectLabel')
         label_links_table.create(label_id: 4, target_type: target_type, target_id: 1)
         link = label_links_table.create(label_id: 1, target_type: target_type, target_id: 1)
@@ -85,7 +85,7 @@ describe Gitlab::BackgroundMigration::FixCrossProjectLabelLinks, :migration, sch
         expect(link.reload.label_id).to eq(1)
       end
-      it 'checks also issues and MRs in subgroups', :nested_groups do
+      it 'checks also issues and MRs in subgroups' do
         link = label_links_table.create(label_id: 2, target_type: target_type, target_id: 1)
         subject.perform(1, 100)

spec/lib/gitlab/bare_repository_import/importer_spec.rb

@@ -103,7 +103,7 @@ describe Gitlab::BareRepositoryImport::Importer, :seed_helper do
     end
   end
-  context 'with subgroups', :nested_groups do
+  context 'with subgroups' do
     let(:project_path) { 'a-group/a-sub-group/a-project' }
     let(:existing_group) do
@@ -188,20 +188,6 @@ describe Gitlab::BareRepositoryImport::Importer, :seed_helper do
     end
   end
-  context 'when subgroups are not available' do
-    let(:project_path) { 'a-group/a-sub-group/a-project' }
-
-    before do
-      expect(Group).to receive(:supports_nested_objects?) { false }
-    end
-
-    describe '#create_project_if_needed' do
-      it 'raises an error' do
-        expect { importer.create_project_if_needed }.to raise_error('Nested groups are not supported on MySQL')
-      end
-    end
-  end
-
   def prepare_repository(project_path, source_project)
     repo_path = File.join(base_dir, project_path)

spec/lib/gitlab/database/count/reltuples_count_strategy_spec.rb

@@ -8,7 +8,7 @@ describe Gitlab::Database::Count::ReltuplesCountStrategy do
   subject { described_class.new(models).count }
-  describe '#count', :postgresql do
+  describe '#count' do
     let(:models) { [Project, Identity] }
     context 'when reltuples is up to date' do

spec/lib/gitlab/database/count/tablesample_count_strategy_spec.rb

@@ -12,7 +12,7 @@ describe Gitlab::Database::Count::TablesampleCountStrategy do
   subject { strategy.count }
-  describe '#count', :postgresql do
+  describe '#count' do
     let(:estimates) do
       {
         Project => threshold + 1,

spec/lib/gitlab/database/grant_spec.rb

@@ -8,7 +8,7 @@ describe Gitlab::Database::Grant do
       expect(described_class.create_and_execute_trigger?('users')).to eq(true)
     end
-    it 'returns false when the user can not create and/or execute a trigger', :postgresql do
+    it 'returns false when the user can not create and/or execute a trigger' do
       # In case of MySQL the user may have SUPER permissions, making it
       # impossible to have `false` returned when running tests; hence we only
       # run these tests on PostgreSQL.

spec/lib/gitlab/group_search_results_spec.rb

@@ -20,7 +20,7 @@ describe Gitlab::GroupSearchResults do
       expect(result).to eq [user1]
     end
-    it 'returns the user belonging to the subgroup matching the search query', :nested_groups do
+    it 'returns the user belonging to the subgroup matching the search query' do
       user1 = create(:user, username: 'gob_bluth')
       subgroup = create(:group, parent: group)
       create(:group_member, :developer, user: user1, group: subgroup)
@@ -32,7 +32,7 @@ describe Gitlab::GroupSearchResults do
       expect(result).to eq [user1]
     end
-    it 'returns the user belonging to the parent group matching the search query', :nested_groups do
+    it 'returns the user belonging to the parent group matching the search query' do
       user1 = create(:user, username: 'gob_bluth')
       parent_group = create(:group, children: [group])
       create(:group_member, :developer, user: user1, group: parent_group)
@@ -44,7 +44,7 @@ describe Gitlab::GroupSearchResults do
       expect(result).to eq [user1]
     end
-    it 'does not return the user belonging to the private subgroup', :nested_groups do
+    it 'does not return the user belonging to the private subgroup' do
       user1 = create(:user, username: 'gob_bluth')
       subgroup = create(:group, :private, parent: group)
       create(:group_member, :developer, user: user1, group: subgroup)

spec/lib/gitlab/manifest_import/manifest_spec.rb

 require 'spec_helper'
-describe Gitlab::ManifestImport::Manifest, :postgresql do
+describe Gitlab::ManifestImport::Manifest do
   let(:file) { File.open(Rails.root.join('spec/fixtures/aosp_manifest.xml')) }
   let(:manifest) { described_class.new(file) }

spec/lib/gitlab/manifest_import/project_creator_spec.rb

 require 'spec_helper'
-describe Gitlab::ManifestImport::ProjectCreator, :postgresql do
+describe Gitlab::ManifestImport::ProjectCreator do
   let(:group) { create(:group) }
   let(:user) { create(:user) }
   let(:repository) do

spec/lib/gitlab/object_hierarchy_spec.rb

 require 'spec_helper'
-describe Gitlab::ObjectHierarchy, :postgresql do
+describe Gitlab::ObjectHierarchy do
   let!(:parent) { create(:group) }
   let!(:child1) { create(:group, parent: parent) }
   let!(:child2) { create(:group, parent: child1) }

spec/lib/gitlab/performance_bar_spec.rb

@@ -96,7 +96,7 @@ describe Gitlab::PerformanceBar do
       end
     end
-    context 'when allowed group is nested', :nested_groups do
+    context 'when allowed group is nested' do
       let!(:nested_my_group) { create(:group, parent: create(:group, path: 'my-org'), path: 'my-group') }
       before do
@@ -110,7 +110,7 @@ describe Gitlab::PerformanceBar do
       end
     end
-    context 'when a nested group has the same path', :nested_groups do
+    context 'when a nested group has the same path' do
       before do
         create(:group, :nested, path: 'my-group').add_developer(user)
       end

spec/lib/gitlab/project_authorizations_spec.rb

@@ -20,13 +20,7 @@ describe Gitlab::ProjectAuthorizations do
   end
   let(:authorizations) do
-    klass = if Group.supports_nested_objects?
-              Gitlab::ProjectAuthorizations::WithNestedGroups
-            else
-              Gitlab::ProjectAuthorizations::WithoutNestedGroups
-            end
-
-    klass.new(user).calculate
+    described_class.new(user).calculate
   end
   it 'returns the correct number of authorizations' do
@@ -46,28 +40,26 @@ describe Gitlab::ProjectAuthorizations do
     expect(mapping[group_project.id]).to eq(Gitlab::Access::DEVELOPER)
   end
-  if Group.supports_nested_objects?
-    context 'with nested groups' do
-      let!(:nested_group) { create(:group, parent: group) }
-      let!(:nested_project) { create(:project, namespace: nested_group) }
-      it 'includes nested groups' do
-        expect(authorizations.pluck(:project_id)).to include(nested_project.id)
-      end
-      it 'inherits access levels when the user is not a member of a nested group' do
-        mapping = map_access_levels(authorizations)
-        expect(mapping[nested_project.id]).to eq(Gitlab::Access::DEVELOPER)
-      end
-      it 'uses the greatest access level when a user is a member of a nested group' do
-        nested_group.add_maintainer(user)
-        mapping = map_access_levels(authorizations)
-        expect(mapping[nested_project.id]).to eq(Gitlab::Access::MAINTAINER)
-      end
+  context 'with nested groups' do
+    let!(:nested_group) { create(:group, parent: group) }
+    let!(:nested_project) { create(:project, namespace: nested_group) }
+    it 'includes nested groups' do
+      expect(authorizations.pluck(:project_id)).to include(nested_project.id)
+    end
+    it 'inherits access levels when the user is not a member of a nested group' do
+      mapping = map_access_levels(authorizations)
+      expect(mapping[nested_project.id]).to eq(Gitlab::Access::DEVELOPER)
+    end
+    it 'uses the greatest access level when a user is a member of a nested group' do
+      nested_group.add_maintainer(user)
+      mapping = map_access_levels(authorizations)
+      expect(mapping[nested_project.id]).to eq(Gitlab::Access::MAINTAINER)
     end
   end
 end

spec/lib/gitlab/sql/cte_spec.rb

 require 'spec_helper'
-describe Gitlab::SQL::CTE, :postgresql do
+describe Gitlab::SQL::CTE do
   describe '#to_arel' do
     it 'generates an Arel relation for the CTE body' do
       relation = User.where(id: 1)

spec/lib/gitlab/sql/recursive_cte_spec.rb

 require 'spec_helper'
-describe Gitlab::SQL::RecursiveCTE, :postgresql do
+describe Gitlab::SQL::RecursiveCTE do
   let(:cte) { described_class.new(:cte_name) }
   describe '#to_arel' do

spec/models/ci/runner_spec.rb

@@ -146,7 +146,7 @@ describe Ci::Runner do
       expect(described_class.belonging_to_parent_group_of_project(project.id)).to contain_exactly(runner)
     end
-    context 'with a parent group with a runner', :nested_groups do
+    context 'with a parent group with a runner' do
       let(:runner) { create(:ci_runner, :group, groups: [parent_group]) }
       let(:project) { create(:project, group: group) }
       let(:group) { create(:group, parent: parent_group) }

spec/models/clusters/cluster_spec.rb

@@ -342,7 +342,7 @@ describe Clusters::Cluster, :use_clean_rails_memory_store_caching do
       end
     end
-    context 'when sub-group has configured kubernetes cluster', :nested_groups do
+    context 'when sub-group has configured kubernetes cluster' do
       let(:sub_group_cluster) { create(:cluster, :provided_by_gcp, :group) }
       let(:sub_group) { sub_group_cluster.group }
       let(:project) { create(:project, group: sub_group) }

spec/models/concerns/deployment_platform_spec.rb

@@ -45,7 +45,7 @@ describe DeploymentPlatform do
         is_expected.to eq(group_cluster.platform_kubernetes)
       end
-      context 'when child group has configured kubernetes cluster', :nested_groups do
+      context 'when child group has configured kubernetes cluster' do
         let(:child_group1) { create(:group, parent: group) }
         let!(:child_group1_cluster) { create(:cluster_for_group, groups: [child_group1]) }

spec/models/concerns/group_descendant_spec.rb

@@ -2,7 +2,7 @@
 require 'spec_helper'
-describe GroupDescendant, :nested_groups do
+describe GroupDescendant do
   let(:parent) { create(:group) }
   let(:subgroup) { create(:group, parent: parent) }
   let(:subsub_group) { create(:group, parent: subgroup) }
@@ -84,7 +84,7 @@ describe GroupDescendant, :nested_groups do
       it 'tracks the exception when a parent was not preloaded' do
         expect(Gitlab::Sentry).to receive(:track_exception).and_call_original
-        expect { GroupDescendant.build_hierarchy([subsub_group]) }.to raise_error(ArgumentError)
+        expect { described_class.build_hierarchy([subsub_group]) }.to raise_error(ArgumentError)
       end
       it 'recovers if a parent was not reloaded by querying for the parent' do
@@ -93,7 +93,7 @@ describe GroupDescendant, :nested_groups do
         # this does not raise in production, so stubbing it here.
         allow(Gitlab::Sentry).to receive(:track_exception)
-        expect(GroupDescendant.build_hierarchy([subsub_group])).to eq(expected_hierarchy)
+        expect(described_class.build_hierarchy([subsub_group])).to eq(expected_hierarchy)
       end
       it 'raises an error if not all elements were preloaded' do