Import group boards & board lists via ndjson when using Bulk Import

  - Add boards, board lists & milestones to the list of relations
    imported with ndjson when using Bulk Import in order to
    preserve board associations

Changelog: added
EE: true

app/workers/bulk_imports/pipeline_worker.rb

@@ -43,7 +43,7 @@ module BulkImports
 
     def run(pipeline_tracker)
       if ndjson_pipeline?(pipeline_tracker)
-        status = ExportStatus.new(pipeline_tracker, pipeline_tracker.pipeline_class::RELATION)
+        status = ExportStatus.new(pipeline_tracker, pipeline_tracker.pipeline_class.relation)
 
         raise(Pipeline::ExpiredError, 'Pipeline timeout') if job_timeout?(pipeline_tracker)
         raise(Pipeline::FailedError, status.error) if status.failed?

doc/user/group/import/index.md

@@ -69,6 +69,8 @@ The following resources are migrated to the target instance:
   - name
   - link URL
   - image URL
+- Boards
+- Board Lists
 
 Any other items are **not** migrated.
 

ee/lib/bulk_imports/groups/pipelines/epics_pipeline.rb

@@ -6,44 +6,9 @@ module BulkImports
       class EpicsPipeline
         include BulkImports::NdjsonPipeline
 
-        RELATION = 'epics'
+        relation_name 'epics'
 
-        extractor ::BulkImports::Common::Extractors::NdjsonExtractor, relation: RELATION
-
-        def transform(context, data)
-          relation_hash = data.first
-          relation_index = data.last
-          relation_definition = import_export_config.top_relation_tree(RELATION)
-
-          deep_transform_relation!(relation_hash, RELATION, relation_definition) do |key, hash|
-            Gitlab::ImportExport::Group::RelationFactory.create(
-              relation_index: relation_index,
-              relation_sym: key.to_sym,
-              relation_hash: hash,
-              importable: context.portable,
-              members_mapper: members_mapper,
-              object_builder: object_builder,
-              user: context.current_user,
-              excluded_keys: import_export_config.relation_excluded_keys(key)
-            )
-          end
-        end
-
-        def load(_, epic)
-          return unless epic
-
-          epic.save! unless epic.persisted?
-        end
-
-        private
-
-        def members_mapper
-          @members_mapper ||= Gitlab::ImportExport::MembersMapper.new(
-            exported_members: [], # importer user is authoring everything for now
-            user: context.current_user,
-            importable: context.portable
-          )
-        end
+        extractor ::BulkImports::Common::Extractors::NdjsonExtractor, relation: relation
       end
     end
   end

ee/spec/fixtures/bulk_imports/boards.ndjson

+{"id":57,"project_id":null,"created_at":"2019-11-20T17:27:41.118Z","updated_at":"2019-11-20T17:27:41.118Z","name":"first board","milestone_id":-2,"milestone":{"id":-2,"name":"#upcoming","title":"Upcoming"},"group_id":4351,"weight":null,"labels":[],"lists":[{"id":231,"board_id":173,"label_id":null,"list_type":"assignee","position":3,"created_at":"2020-02-11T17:02:14.073Z","updated_at":"2020-02-11T17:02:14.073Z","user_id":70,"milestone_id":null,"max_issue_count":0,"max_issue_weight":0,"board":{"id":173,"project_id":null,"created_at":"2020-02-11T14:35:51.561Z","updated_at":"2020-02-11T14:35:51.561Z","name":"hi","milestone_id":null,"group_id":4351,"weight":null}},{"id":33,"board_id":173,"label_id":null,"list_type":"milestone","position":1,"created_at":"2020-02-10T16:16:01.896Z","updated_at":"2020-02-10T16:16:01.896Z","user_id":null,"milestone_id":264,"max_issue_count":0,"max_issue_weight":0,"milestone":{"id":264,"title":"v2.2","project_id":null,"description":"Voluptatum itaque natus laboriosam dolor omnis eaque quos cupiditate.","due_date":null,"created_at":"2020-02-06T15:44:52.126Z","updated_at":"2020-02-06T15:44:52.126Z","state":"active","iid":1,"start_date":null,"group_id":4351,"events":[]},"board":{"id":173,"project_id":null,"created_at":"2020-02-11T14:35:51.561Z","updated_at":"2020-02-11T14:35:51.561Z","name":"hi","milestone_id":null,"group_id":4351,"weight":null}}]}
+{"id":57,"project_id":null,"created_at":"2019-11-20T17:27:41.118Z","updated_at":"2019-11-20T17:27:41.118Z","name":"second board","milestone_id":7642,"milestone":{"id":7642,"title":"v4.0","project_id":null,"description":"Et laudantium enim omnis ea reprehenderit iure.","due_date":null,"created_at":"2019-11-20T17:02:14.336Z","updated_at":"2019-11-20T17:02:14.336Z","state":"closed","iid":5,"start_date":null,"group_id":4351},"group_id":4351,"weight":null,"labels":[],"lists":[]}

ee/spec/lib/bulk_imports/groups/pipelines/boards_pipeline_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe BulkImports::Groups::Pipelines::BoardsPipeline do
+  let_it_be(:user) { create(:user) }
+  let_it_be(:group) { create(:group) }
+  let_it_be(:bulk_import) { create(:bulk_import, user: user) }
+  let_it_be(:filepath) { 'ee/spec/fixtures/bulk_imports/gz/boards.ndjson.gz' }
+  let_it_be(:entity) do
+    create(
+      :bulk_import_entity,
+      group: group,
+      bulk_import: bulk_import,
+      source_full_path: 'source/full/path',
+      destination_name: 'My Destination Group',
+      destination_namespace: group.full_path
+    )
+  end
+
+  let_it_be(:tracker) { create(:bulk_import_tracker, entity: entity) }
+  let_it_be(:context) { BulkImports::Pipeline::Context.new(tracker) }
+
+  let(:tmpdir) { Dir.mktmpdir }
+
+  before do
+    stub_licensed_features(board_assignee_lists: true, board_milestone_lists: true)
+    FileUtils.copy_file(filepath, File.join(tmpdir, 'boards.ndjson.gz'))
+    group.add_owner(user)
+  end
+
+  subject { described_class.new(context) }
+
+  describe '#run' do
+    it 'imports group boards into destination group and removes tmpdir' do
+      allow(Dir).to receive(:mktmpdir).and_return(tmpdir)
+      allow_next_instance_of(BulkImports::FileDownloadService) do |service|
+        allow(service).to receive(:execute)
+      end
+
+      expect { subject.run }.to change(Board, :count).by(2)
+
+      lists = group.boards.find_by(name: 'first board').lists
+      board_one = group.boards.find_by(name: 'first board')
+      board_two = group.boards.find_by(name: 'second board')
+
+      expect(lists.map(&:list_type)).to contain_exactly('assignee', 'milestone')
+      expect(board_one.milestone).to be_nil
+      expect(board_two.milestone.title).to eq 'v4.0'
+    end
+  end
+end

ee/spec/lib/bulk_imports/groups/pipelines/epics_pipeline_spec.rb

@@ -90,7 +90,7 @@ RSpec.describe BulkImports::Groups::Pipelines::EpicsPipeline do
       expect(described_class.get_extractor)
         .to eq(
           klass: BulkImports::Common::Extractors::NdjsonExtractor,
-          options: { relation: described_class::RELATION }
+          options: { relation: described_class.relation }
         )
     end
   end

ee/spec/lib/ee/bulk_imports/stage_spec.rb

@@ -12,6 +12,7 @@ RSpec.describe BulkImports::Stage do
       [1, BulkImports::Groups::Pipelines::MilestonesPipeline],
       [1, BulkImports::Groups::Pipelines::BadgesPipeline],
       [1, BulkImports::Groups::Pipelines::IterationsPipeline],
+      [2, BulkImports::Groups::Pipelines::BoardsPipeline],
       [2, BulkImports::Groups::Pipelines::EpicsPipeline],
       [4, BulkImports::Groups::Pipelines::EntityFinisher]
     ]

ee/spec/services/geo/file_upload_service_spec.rb

@@ -238,7 +238,7 @@ RSpec.describe Geo::FileUploadService do
     context 'bulk imports export file' do
       let_it_be(:type) { :'bulk_imports/export' }
       let_it_be(:export) { create(:bulk_import_export) }
-      let_it_be(:file) { fixture_file_upload('spec/fixtures/bulk_imports/labels.ndjson.gz') }
+      let_it_be(:file) { fixture_file_upload('spec/fixtures/bulk_imports/gz/labels.ndjson.gz') }
 
       let(:upload) { Upload.find_by(model: export, uploader: 'BulkImports::ExportUploader') }
       let(:request_data) { Gitlab::Geo::Replication::FileTransfer.new(type, upload).request_data }

lib/bulk_imports/groups/pipelines/boards_pipeline.rb

+# frozen_string_literal: true
+
+module BulkImports
+  module Groups
+    module Pipelines
+      class BoardsPipeline
+        include NdjsonPipeline
+
+        relation_name 'boards'
+
+        extractor ::BulkImports::Common::Extractors::NdjsonExtractor, relation: relation
+      end
+    end
+  end
+end

lib/bulk_imports/groups/pipelines/labels_pipeline.rb

@@ -6,34 +6,9 @@ module BulkImports
       class LabelsPipeline
         include NdjsonPipeline
 
-        RELATION = 'labels'
+        relation_name 'labels'
 
-        extractor ::BulkImports::Common::Extractors::NdjsonExtractor, relation: RELATION
-
-        def transform(context, data)
-          relation_hash = data.first
-          relation_index = data.last
-          relation_definition = import_export_config.top_relation_tree(RELATION)
-
-          deep_transform_relation!(relation_hash, RELATION, relation_definition) do |key, hash|
-            Gitlab::ImportExport::Group::RelationFactory.create(
-              relation_index: relation_index,
-              relation_sym: key.to_sym,
-              relation_hash: hash,
-              importable: context.portable,
-              members_mapper: nil,
-              object_builder: object_builder,
-              user: context.current_user,
-              excluded_keys: import_export_config.relation_excluded_keys(key)
-            )
-          end
-        end
-
-        def load(_, label)
-          return unless label
-
-          label.save! unless label.persisted?
-        end
+        extractor ::BulkImports::Common::Extractors::NdjsonExtractor, relation: relation
       end
     end
   end

lib/bulk_imports/groups/pipelines/milestones_pipeline.rb

@@ -4,26 +4,11 @@ module BulkImports
   module Groups
     module Pipelines
       class MilestonesPipeline
-        include Pipeline
+        include NdjsonPipeline
 
-        extractor BulkImports::Common::Extractors::GraphqlExtractor,
-          query: BulkImports::Groups::Graphql::GetMilestonesQuery
+        relation_name 'milestones'
 
-        transformer Common::Transformers::ProhibitedAttributesTransformer
-
-        def load(context, data)
-          return unless data
-
-          raise ::BulkImports::Pipeline::NotAllowedError unless authorized?
-
-          context.group.milestones.create!(data)
-        end
-
-        private
-
-        def authorized?
-          context.current_user.can?(:admin_milestone, context.group)
-        end
+        extractor ::BulkImports::Common::Extractors::NdjsonExtractor, relation: relation
       end
     end
   end

lib/bulk_imports/ndjson_pipeline.rb

@@ -9,6 +9,30 @@ module BulkImports
     included do
       ndjson_pipeline!
 
+      def transform(context, data)
+        relation_hash, relation_index = data
+        relation_definition = import_export_config.top_relation_tree(relation)
+
+        deep_transform_relation!(relation_hash, relation, relation_definition) do |key, hash|
+          Gitlab::ImportExport::Group::RelationFactory.create(
+            relation_index: relation_index,
+            relation_sym: key.to_sym,
+            relation_hash: hash,
+            importable: context.portable,
+            members_mapper: members_mapper,
+            object_builder: object_builder,
+            user: context.current_user,
+            excluded_keys: import_export_config.relation_excluded_keys(key)
+          )
+        end
+      end
+
+      def load(_, object)
+        return unless object
+
+        object.save! unless object.persisted?
+      end
+
       def deep_transform_relation!(relation_hash, relation_key, relation_definition, &block)
         relation_key = relation_key_override(relation_key)
 
@@ -58,6 +82,18 @@ module BulkImports
       def object_builder
         "Gitlab::ImportExport::#{portable.class}::ObjectBuilder".constantize
       end
+
+      def relation
+        self.class.relation
+      end
+
+      def members_mapper
+        @members_mapper ||= Gitlab::ImportExport::MembersMapper.new(
+          exported_members: [],
+          user: current_user,
+          importable: portable
+        )
+      end
     end
   end
 end

lib/bulk_imports/pipeline.rb

@@ -30,6 +30,10 @@ module BulkImports
       @import_export_config ||= context.import_export_config
     end
 
+    def current_user
+      @current_user ||= context.current_user
+    end
+
     included do
       private
 
@@ -174,6 +178,14 @@ module BulkImports
         class_attributes[:ndjson_pipeline]
       end
 
+      def relation_name(name)
+        class_attributes[:relation_name] = name
+      end
+
+      def relation
+        class_attributes[:relation_name]
+      end
+
       private
 
       def add_attribute(sym, klass, options)

lib/bulk_imports/stage.rb

@@ -29,9 +29,13 @@ module BulkImports
         pipeline: BulkImports::Groups::Pipelines::BadgesPipeline,
         stage: 1
       },
+      boards: {
+        pipeline: BulkImports::Groups::Pipelines::BoardsPipeline,
+        stage: 2
+      },
       finisher: {
         pipeline: BulkImports::Groups::Pipelines::EntityFinisher,
-        stage: 2
+        stage: 3
       }
     }.freeze
 

spec/fixtures/bulk_imports/boards.ndjson

+{"id":173,"project_id":null,"created_at":"2020-02-11T14:35:51.561Z","updated_at":"2020-02-11T14:35:51.561Z","name":"first board","milestone_id":null,"group_id":4351,"weight":null,"lists":[{"id":189,"board_id":173,"label_id":271,"list_type":"label","position":0,"created_at":"2020-02-11T14:35:57.131Z","updated_at":"2020-02-11T14:35:57.131Z","user_id":null,"milestone_id":null,"max_issue_count":0,"max_issue_weight":0,"label":{"id":271,"title":"TSL","color":"#58796f","project_id":null,"created_at":"2019-11-20T17:02:20.541Z","updated_at":"2020-02-06T15:44:52.048Z","template":false,"description":null,"group_id":4351,"type":"GroupLabel","priorities":[]},"board":{"id":173,"project_id":null,"created_at":"2020-02-11T14:35:51.561Z","updated_at":"2020-02-11T14:35:51.561Z","name":"hi","milestone_id":null,"group_id":4351,"weight":null}},{"id":190,"board_id":173,"label_id":272,"list_type":"label","position":1,"created_at":"2020-02-11T14:35:57.868Z","updated_at":"2020-02-11T14:35:57.868Z","user_id":null,"milestone_id":null,"max_issue_count":0,"max_issue_weight":0,"label":{"id":272,"title":"Sosync","color":"#110320","project_id":null,"created_at":"2019-11-20T17:02:20.532Z","updated_at":"2020-02-06T15:44:52.057Z","template":false,"description":null,"group_id":4351,"type":"GroupLabel","priorities":[]},"board":{"id":173,"project_id":null,"created_at":"2020-02-11T14:35:51.561Z","updated_at":"2020-02-11T14:35:51.561Z","name":"hi","milestone_id":null,"group_id":4351,"weight":null}},{"id":188,"board_id":173,"label_id":null,"list_type":"closed","position":null,"created_at":"2020-02-11T14:35:51.593Z","updated_at":"2020-02-11T14:35:51.593Z","user_id":null,"milestone_id":null,"max_issue_count":0,"max_issue_weight":0}],"labels":[]}

spec/fixtures/bulk_imports/labels.ndjson

+{"id":111,"title":"Label 1","color":"#6699cc","project_id":null,"created_at":"2021-04-15T07:15:08.063Z","updated_at":"2021-04-15T07:15:08.063Z","template":false,"description":"Label 1","group_id":107,"type":"GroupLabel","priorities":[],"textColor":"#FFFFFF"}

spec/fixtures/bulk_imports/milestones.ndjson

+{"id":7642,"title":"v4.0","project_id":null,"description":"Et laudantium enim omnis ea reprehenderit iure.","due_date":null,"created_at":"2019-11-20T17:02:14.336Z","updated_at":"2019-11-20T17:02:14.336Z","state":"closed","iid":5,"start_date":null,"group_id":4351}
+{"id":7641,"title":"v3.0","project_id":null,"description":"Et repellat culpa nemo consequatur ut reprehenderit.","due_date":null,"created_at":"2019-11-20T17:02:14.323Z","updated_at":"2019-11-20T17:02:14.323Z","state":"active","iid":4,"start_date":null,"group_id":4351}
+{"id":7640,"title":"v2.0","project_id":null,"description":"Velit cupiditate est neque voluptates iste rem sunt.","due_date":null,"created_at":"2019-11-20T17:02:14.309Z","updated_at":"2019-11-20T17:02:14.309Z","state":"active","iid":3,"start_date":null,"group_id":4351}
+{"id":7639,"title":"v1.0","project_id":null,"description":"Amet velit repellat ut rerum aut cum.","due_date":null,"created_at":"2019-11-20T17:02:14.296Z","updated_at":"2019-11-20T17:02:14.296Z","state":"active","iid":2,"start_date":null,"group_id":4351}
+{"id":7638,"title":"v0.0","project_id":null,"description":"Ea quia asperiores ut modi dolorem sunt non numquam.","due_date":null,"created_at":"2019-11-20T17:02:14.282Z","updated_at":"2019-11-20T17:02:14.282Z","state":"active","iid":1,"start_date":null,"group_id":4351}

spec/lib/bulk_imports/common/extractors/ndjson_extractor_spec.rb

@@ -4,7 +4,7 @@ require 'spec_helper'
 
 RSpec.describe BulkImports::Common::Extractors::NdjsonExtractor do
   let_it_be(:tmpdir) { Dir.mktmpdir }
-  let_it_be(:filepath) { 'spec/fixtures/bulk_imports/labels.ndjson.gz' }
+  let_it_be(:filepath) { 'spec/fixtures/bulk_imports/gz/labels.ndjson.gz' }
   let_it_be(:import) { create(:bulk_import) }
   let_it_be(:config) { create(:bulk_import_configuration, bulk_import: import) }
   let_it_be(:entity) { create(:bulk_import_entity, bulk_import: import) }

spec/lib/bulk_imports/groups/pipelines/boards_pipeline_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe BulkImports::Groups::Pipelines::BoardsPipeline do
+  let_it_be(:user) { create(:user) }
+  let_it_be(:group) { create(:group) }
+  let_it_be(:bulk_import) { create(:bulk_import, user: user) }
+  let_it_be(:filepath) { 'spec/fixtures/bulk_imports/gz/boards.ndjson.gz' }
+  let_it_be(:entity) do
+    create(
+      :bulk_import_entity,
+      group: group,
+      bulk_import: bulk_import,
+      source_full_path: 'source/full/path',
+      destination_name: 'My Destination Group',
+      destination_namespace: group.full_path
+    )
+  end
+
+  let_it_be(:tracker) { create(:bulk_import_tracker, entity: entity) }
+  let_it_be(:context) { BulkImports::Pipeline::Context.new(tracker) }
+
+  let(:tmpdir) { Dir.mktmpdir }
+
+  before do
+    FileUtils.copy_file(filepath, File.join(tmpdir, 'boards.ndjson.gz'))
+    group.add_owner(user)
+  end
+
+  subject { described_class.new(context) }
+
+  describe '#run' do
+    it 'imports group boards into destination group and removes tmpdir' do
+      allow(Dir).to receive(:mktmpdir).and_return(tmpdir)
+      allow_next_instance_of(BulkImports::FileDownloadService) do |service|
+        allow(service).to receive(:execute)
+      end
+
+      expect { subject.run }.to change(Board, :count).by(1)
+
+      lists = group.boards.find_by(name: 'first board').lists
+
+      expect(lists.count).to eq(3)
+      expect(lists.first.label.title).to eq('TSL')
+      expect(lists.second.label.title).to eq('Sosync')
+    end
+  end
+end

spec/lib/bulk_imports/groups/pipelines/labels_pipeline_spec.rb

@@ -6,7 +6,7 @@ RSpec.describe BulkImports::Groups::Pipelines::LabelsPipeline do
   let_it_be(:user) { create(:user) }
   let_it_be(:group) { create(:group) }
   let_it_be(:bulk_import) { create(:bulk_import, user: user) }
-  let_it_be(:filepath) { 'spec/fixtures/bulk_imports/labels.ndjson.gz' }
+  let_it_be(:filepath) { 'spec/fixtures/bulk_imports/gz/labels.ndjson.gz' }
   let_it_be(:entity) do
     create(
       :bulk_import_entity,
@@ -75,17 +75,4 @@ RSpec.describe BulkImports::Groups::Pipelines::LabelsPipeline do
       end
     end
   end
-
-  describe 'pipeline parts' do
-    it { expect(described_class).to include_module(BulkImports::NdjsonPipeline) }
-    it { expect(described_class).to include_module(BulkImports::Pipeline::Runner) }
-
-    it 'has extractor' do
-      expect(described_class.get_extractor)
-        .to eq(
-          klass: BulkImports::Common::Extractors::NdjsonExtractor,
-          options: { relation: described_class::RELATION }
-        )
-    end
-  end
 end

spec/lib/bulk_imports/groups/pipelines/milestones_pipeline_spec.rb

@@ -5,119 +5,69 @@ require 'spec_helper'
 RSpec.describe BulkImports::Groups::Pipelines::MilestonesPipeline do
   let_it_be(:user) { create(:user) }
   let_it_be(:group) { create(:group) }
-  let_it_be(:timestamp) { Time.new(2020, 01, 01).utc }
   let_it_be(:bulk_import) { create(:bulk_import, user: user) }
-
+  let_it_be(:filepath) { 'spec/fixtures/bulk_imports/gz/milestones.ndjson.gz' }
   let_it_be(:entity) do
     create(
       :bulk_import_entity,
+      group: group,
       bulk_import: bulk_import,
       source_full_path: 'source/full/path',
       destination_name: 'My Destination Group',
-      destination_namespace: group.full_path,
-      group: group
+      destination_namespace: group.full_path
     )
   end
 
   let_it_be(:tracker) { create(:bulk_import_tracker, entity: entity) }
   let_it_be(:context) { BulkImports::Pipeline::Context.new(tracker) }
 
-  subject { described_class.new(context) }
+  let(:tmpdir) { Dir.mktmpdir }
 
   before do
+    FileUtils.copy_file(filepath, File.join(tmpdir, 'milestones.ndjson.gz'))
     group.add_owner(user)
   end
 
-  describe '#run' do
-    it 'imports group milestones' do
-      first_page = extracted_data(title: 'milestone1', iid: 1, has_next_page: true)
-      last_page = extracted_data(title: 'milestone2', iid: 2)
+  subject { described_class.new(context) }
 
-      allow_next_instance_of(BulkImports::Common::Extractors::GraphqlExtractor) do |extractor|
-        allow(extractor)
-          .to receive(:extract)
-          .and_return(first_page, last_page)
+  describe '#run' do
+    it 'imports group milestones into destination group and removes tmpdir' do
+      allow(Dir).to receive(:mktmpdir).and_return(tmpdir)
+      allow_next_instance_of(BulkImports::FileDownloadService) do |service|
+        allow(service).to receive(:execute)
       end
 
-      expect { subject.run }.to change(Milestone, :count).by(2)
-
-      expect(group.milestones.pluck(:title)).to contain_exactly('milestone1', 'milestone2')
-
-      milestone = group.milestones.last
-
-      expect(milestone.description).to eq('desc')
-      expect(milestone.state).to eq('closed')
-      expect(milestone.start_date.to_s).to eq('2020-10-21')
-      expect(milestone.due_date.to_s).to eq('2020-10-22')
-      expect(milestone.created_at).to eq(timestamp)
-      expect(milestone.updated_at).to eq(timestamp)
+      expect { subject.run }.to change(Milestone, :count).by(5)
+      expect(group.milestones.pluck(:title)).to contain_exactly('v4.0', 'v3.0', 'v2.0', 'v1.0', 'v0.0')
+      expect(File.directory?(tmpdir)).to eq(false)
     end
   end
 
   describe '#load' do
-    it 'creates the milestone' do
-      data = milestone_data('milestone')
-
-      expect { subject.load(context, data) }.to change(Milestone, :count).by(1)
-    end
-
-    context 'when user is not authorized to create the milestone' do
-      before do
-        allow(user).to receive(:can?).with(:admin_milestone, group).and_return(false)
-      end
+    context 'when milestone is not persisted' do
+      it 'saves the milestone' do
+        milestone = build(:milestone, group: group)
 
-      it 'raises NotAllowedError' do
-        data = extracted_data(title: 'milestone')
+        expect(milestone).to receive(:save!)
 
-        expect { subject.load(context, data) }.to raise_error(::BulkImports::Pipeline::NotAllowedError)
+        subject.load(context, milestone)
       end
     end
-  end
 
-  describe 'pipeline parts' do
-    it { expect(described_class).to include_module(BulkImports::Pipeline) }
-    it { expect(described_class).to include_module(BulkImports::Pipeline::Runner) }
+    context 'when milestone is persisted' do
+      it 'does not save milestone' do
+        milestone = create(:milestone, group: group)
 
-    it 'has extractors' do
-      expect(described_class.get_extractor)
-        .to eq(
-          klass: BulkImports::Common::Extractors::GraphqlExtractor,
-          options: {
-            query: BulkImports::Groups::Graphql::GetMilestonesQuery
-          }
-        )
-    end
+        expect(milestone).not_to receive(:save!)
 
-    it 'has transformers' do
-      expect(described_class.transformers)
-        .to contain_exactly(
-          { klass: BulkImports::Common::Transformers::ProhibitedAttributesTransformer, options: nil }
-        )
+        subject.load(context, milestone)
+      end
     end
-  end
 
-  def milestone_data(title, iid: 1)
-    {
-      'title' => title,
-      'description' => 'desc',
-      'iid' => iid,
-      'state' => 'closed',
-      'start_date' => '2020-10-21',
-      'due_date' => '2020-10-22',
-      'created_at' => timestamp.to_s,
-      'updated_at' => timestamp.to_s
-    }
-  end
-
-  def extracted_data(title:, iid: 1, has_next_page: false)
-    page_info = {
-      'has_next_page' => has_next_page,
-      'next_page' => has_next_page ? 'cursor' : nil
-    }
-
-    BulkImports::Pipeline::ExtractedData.new(
-      data: milestone_data(title, iid: iid),
-      page_info: page_info
-    )
+    context 'when milestone is missing' do
+      it 'returns' do
+        expect(subject.load(context, nil)).to be_nil
+      end
+    end
   end
 end

spec/lib/bulk_imports/ndjson_pipeline_spec.rb

@@ -5,22 +5,31 @@ require 'spec_helper'
 RSpec.describe BulkImports::NdjsonPipeline do
   let_it_be(:group) { create(:group) }
   let_it_be(:project) { create(:project) }
-  let_it_be(:klass) do
+  let_it_be(:user) { create(:user) }
+
+  let(:klass) do
     Class.new do
       include BulkImports::NdjsonPipeline
 
-      attr_reader :portable
+      relation_name 'test'
+
+      attr_reader :portable, :current_user
 
-      def initialize(portable)
+      def initialize(portable, user)
         @portable = portable
+        @current_user = user
       end
     end
   end
 
-  subject { klass.new(group) }
+  before do
+    stub_const('NdjsonPipelineClass', klass)
+  end
+
+  subject { NdjsonPipelineClass.new(group, user) }
 
   it 'marks pipeline as ndjson' do
-    expect(klass.ndjson_pipeline?).to eq(true)
+    expect(NdjsonPipelineClass.ndjson_pipeline?).to eq(true)
   end
 
   describe '#deep_transform_relation!' do
@@ -91,6 +100,60 @@ RSpec.describe BulkImports::NdjsonPipeline do
     end
   end
 
+  describe '#transform' do
+    it 'calls relation factory' do
+      hash = { key: :value }
+      data = [hash, 1]
+      user = double
+      config = double(relation_excluded_keys: nil, top_relation_tree: [])
+      context = double(portable: group, current_user: user, import_export_config: config)
+      allow(subject).to receive(:import_export_config).and_return(config)
+
+      expect(Gitlab::ImportExport::Group::RelationFactory)
+        .to receive(:create)
+        .with(
+          relation_index: 1,
+          relation_sym: :test,
+          relation_hash: hash,
+          importable: group,
+          members_mapper: instance_of(Gitlab::ImportExport::MembersMapper),
+          object_builder: Gitlab::ImportExport::Group::ObjectBuilder,
+          user: user,
+          excluded_keys: nil
+        )
+
+      subject.transform(context, data)
+    end
+  end
+
+  describe '#load' do
+    context 'when object is not persisted' do
+      it 'saves the object' do
+        object = double(persisted?: false)
+
+        expect(object).to receive(:save!)
+
+        subject.load(nil, object)
+      end
+    end
+
+    context 'when object is persisted' do
+      it 'does not save the object' do
+        object = double(persisted?: true)
+
+        expect(object).not_to receive(:save!)
+
+        subject.load(nil, object)
+      end
+    end
+
+    context 'when object is missing' do
+      it 'returns' do
+        expect(subject.load(nil, nil)).to be_nil
+      end
+    end
+  end
+
   describe '#relation_class' do
     context 'when relation name is pluralized' do
       it 'returns constantized class' do
@@ -113,7 +176,7 @@ RSpec.describe BulkImports::NdjsonPipeline do
     end
 
     context 'when portable is project' do
-      subject { klass.new(project) }
+      subject { NdjsonPipelineClass.new(project, user) }
 
       it 'returns group relation name override' do
         expect(subject.relation_key_override('labels')).to eq('project_labels')

spec/lib/bulk_imports/stage_spec.rb

@@ -10,7 +10,8 @@ RSpec.describe BulkImports::Stage do
       [1, BulkImports::Groups::Pipelines::MembersPipeline],
       [1, BulkImports::Groups::Pipelines::LabelsPipeline],
       [1, BulkImports::Groups::Pipelines::MilestonesPipeline],
-      [1, BulkImports::Groups::Pipelines::BadgesPipeline]
+      [1, BulkImports::Groups::Pipelines::BadgesPipeline],
+      [2, BulkImports::Groups::Pipelines::BoardsPipeline]
     ]
   end
 

spec/lib/gitlab/import_export/command_line_util_spec.rb

@@ -57,7 +57,7 @@ RSpec.describe Gitlab::ImportExport::CommandLineUtil do
     it 'decompresses specified file' do
       tmpdir = Dir.mktmpdir
       filename = 'labels.ndjson.gz'
-      gz_filepath = "spec/fixtures/bulk_imports/#{filename}"
+      gz_filepath = "spec/fixtures/bulk_imports/gz/#{filename}"
       FileUtils.copy_file(gz_filepath, File.join(tmpdir, filename))
 
       subject.gunzip(dir: tmpdir, filename: filename)

spec/models/bulk_imports/export_upload_spec.rb

@@ -13,7 +13,7 @@ RSpec.describe BulkImports::ExportUpload do
     method = 'export_file'
     filename = 'labels.ndjson.gz'
 
-    subject.public_send("#{method}=", fixture_file_upload("spec/fixtures/bulk_imports/#{filename}"))
+    subject.public_send("#{method}=", fixture_file_upload("spec/fixtures/bulk_imports/gz/#{filename}"))
     subject.save!
 
     url = "/uploads/-/system/bulk_imports/export_upload/export_file/#{subject.id}/#{filename}"

spec/requests/api/group_export_spec.rb

@@ -215,7 +215,7 @@ RSpec.describe API::GroupExport do
 
       context 'when export file exists' do
         it 'downloads exported group archive' do
-          upload.update!(export_file: fixture_file_upload('spec/fixtures/bulk_imports/labels.ndjson.gz'))
+          upload.update!(export_file: fixture_file_upload('spec/fixtures/bulk_imports/gz/labels.ndjson.gz'))
 
           get api(download_path, user)
 

spec/services/bulk_imports/file_decompression_service_spec.rb

@@ -7,7 +7,7 @@ RSpec.describe BulkImports::FileDecompressionService do
   let_it_be(:ndjson_filename) { 'labels.ndjson' }
   let_it_be(:ndjson_filepath) { File.join(tmpdir, ndjson_filename) }
   let_it_be(:gz_filename) { "#{ndjson_filename}.gz" }
-  let_it_be(:gz_filepath) { "spec/fixtures/bulk_imports/#{gz_filename}" }
+  let_it_be(:gz_filepath) { "spec/fixtures/bulk_imports/gz/#{gz_filename}" }
 
   before do
     FileUtils.copy_file(gz_filepath, File.join(tmpdir, gz_filename))

spec/services/bulk_imports/relation_export_service_spec.rb

@@ -62,7 +62,7 @@ RSpec.describe BulkImports::RelationExportService do
       let(:upload) { create(:bulk_import_export_upload, export: export) }
 
       it 'removes existing export before exporting' do
-        upload.update!(export_file: fixture_file_upload('spec/fixtures/bulk_imports/labels.ndjson.gz'))
+        upload.update!(export_file: fixture_file_upload('spec/fixtures/bulk_imports/gz/labels.ndjson.gz'))
 
         expect_any_instance_of(BulkImports::ExportUpload) do |upload|
           expect(upload).to receive(:remove_export_file!)

spec/workers/bulk_imports/pipeline_worker_spec.rb

@@ -140,6 +140,10 @@ RSpec.describe BulkImports::PipelineWorker do
         def self.ndjson_pipeline?
           true
         end
+
+        def self.relation
+          'test'
+        end
       end
     end
 
@@ -153,7 +157,6 @@ RSpec.describe BulkImports::PipelineWorker do
 
     before do
       stub_const('NdjsonPipeline', ndjson_pipeline)
-      stub_const('NdjsonPipeline::RELATION', 'test')
       allow(BulkImports::Stage)
         .to receive(:pipeline_exists?)
         .with('NdjsonPipeline')