Remove the default value stream

With the use_vsa_aggregated_tables feature flag
enabled we should no longer return the in-memory
default value stream.

ee/app/controllers/groups/analytics/cycle_analytics/value_streams_controller.rb

@@ -97,7 +97,13 @@ class Groups::Analytics::CycleAnalytics::ValueStreamsController < Groups::Analyt
   end
 
   def value_streams
-    @group.value_streams.preload_associated_models.presence || [in_memory_default_value_stream]
+    value_streams = @group.value_streams.preload_associated_models
+
+    if Feature.enabled?(:use_vsa_aggregated_tables, @group, default_enabled: :yaml)
+      value_streams
+    else
+      value_streams.presence || [in_memory_default_value_stream]
+    end
   end
 
   def in_memory_default_value_stream

ee/app/services/ee/analytics/cycle_analytics/stages/list_service.rb

@@ -11,7 +11,11 @@ module EE
           def execute
             return forbidden unless allowed?
 
-            success(persisted_stages.presence || build_default_stages)
+            if parent.is_a?(Group) && ::Feature.enabled?(:use_vsa_aggregated_tables, parent, default_enabled: :yaml)
+              success(persisted_stages)
+            else
+              success(persisted_stages.presence || build_default_stages)
+            end
           end
 
           private

ee/spec/controllers/groups/analytics/cycle_analytics/stages_controller_spec.rb

@@ -5,6 +5,15 @@ require 'spec_helper'
 RSpec.describe Groups::Analytics::CycleAnalytics::StagesController do
   let_it_be(:user) { create(:user) }
   let_it_be(:group, refind: true) { create(:group) }
+  let_it_be(:stages) { [] }
+
+  let_it_be(:value_stream) do
+    create(:cycle_analytics_group_value_stream,
+           group: group,
+           name: 'No stage value stream',
+           stages: stages
+          )
+  end
 
   context 'when params have only group_id' do
     let(:params) { { group_id: group } }
@@ -19,6 +28,8 @@ RSpec.describe Groups::Analytics::CycleAnalytics::StagesController do
     end
 
     context 'when use_vsa_aggregated_tables FF is disabled' do
+      let_it_be(:stages) { Gitlab::Analytics::CycleAnalytics::DefaultStages.all }
+
       it_behaves_like 'Value Stream Analytics Stages controller' do
         before do
           stub_feature_flags(use_vsa_aggregated_tables: false)
@@ -28,7 +39,19 @@ RSpec.describe Groups::Analytics::CycleAnalytics::StagesController do
   end
 
   context 'when params have group_id and value_stream_id' do
-    let_it_be(:value_stream) { create(:cycle_analytics_group_value_stream, group: group) }
+    let_it_be(:stages) do
+      [
+        create(:cycle_analytics_group_stage, group: group, name: "Issue", relative_position: 1),
+        create(:cycle_analytics_group_stage, group: group, name: "Code", relative_position: 2)
+      ]
+    end
+
+    let_it_be(:value_stream) do
+      create(:cycle_analytics_group_value_stream,
+             group: group,
+             name: 'First value stream',
+             stages: stages)
+    end
 
     let(:params) { { group_id: group, value_stream_id: value_stream.id } }
     let(:parent) { group }

ee/spec/controllers/groups/analytics/cycle_analytics/value_streams_controller_spec.rb

@@ -16,14 +16,34 @@ RSpec.describe Groups::Analytics::CycleAnalytics::ValueStreamsController do
   end
 
   describe 'GET #index' do
-    it 'returns an in-memory default value stream' do
-      get :index, params: params
+    context 'when the use_vsa_aggregated_tables feature flag is off' do
+      before do
+        stub_feature_flags(use_vsa_aggregated_tables: false)
+      end
+
+      it 'returns an in-memory default value stream' do
+        get :index, params: params
+
+        expect(response).to have_gitlab_http_status(:ok)
+
+        expect(json_response.size).to eq(1)
+        expect(json_response.first['id']).to eq(Analytics::CycleAnalytics::Stages::BaseService::DEFAULT_VALUE_STREAM_NAME)
+        expect(json_response.first['name']).to eq(Analytics::CycleAnalytics::Stages::BaseService::DEFAULT_VALUE_STREAM_NAME)
+      end
+    end
+
+    context 'when the use_vsa_aggregated_tables feature flag is on' do
+      before do
+        stub_feature_flags(use_vsa_aggregated_tables: true)
+      end
 
-      expect(response).to have_gitlab_http_status(:ok)
+      it 'returns an empty array' do
+        get :index, params: params
 
-      expect(json_response.size).to eq(1)
-      expect(json_response.first['id']).to eq(Analytics::CycleAnalytics::Stages::BaseService::DEFAULT_VALUE_STREAM_NAME)
-      expect(json_response.first['name']).to eq(Analytics::CycleAnalytics::Stages::BaseService::DEFAULT_VALUE_STREAM_NAME)
+        expect(response).to have_gitlab_http_status(:ok)
+
+        expect(json_response.size).to eq(0)
+      end
     end
 
     context 'when persisted value streams present' do

ee/spec/features/groups/analytics/cycle_analytics/charts_spec.rb

@@ -12,6 +12,16 @@ RSpec.describe 'Value stream analytics charts', :js do
   let_it_be(:group_label2) { create(:group_label, group: group) }
   let_it_be(:label) { create(:group_label, group: group2) }
 
+  let_it_be(:custom_value_stream_name) { "New created value stream" }
+
+  let_it_be(:value_stream) do
+    create(:cycle_analytics_group_value_stream, group: group, name: custom_value_stream_name, stages: [
+      create(:cycle_analytics_group_stage, group: group, name: "Issue", relative_position: 1, start_event_identifier: :issue_created, end_event_identifier: :issue_closed),
+      create(:cycle_analytics_group_stage, group: group, name: "Code", relative_position: 2, start_event_identifier: :merge_request_created, end_event_identifier: :merge_request_merged),
+      create(:cycle_analytics_group_stage, group: group, name: "Milestone Plan", relative_position: 3, start_event_identifier: :issue_first_associated_with_milestone, end_event_identifier: :issue_first_added_to_board)
+    ])
+  end
+
   3.times do |i|
     let_it_be("issue_#{i}".to_sym) { create(:issue, title: "New Issue #{i}", project: project, created_at: 2.days.ago) }
   end
@@ -33,12 +43,9 @@ RSpec.describe 'Value stream analytics charts', :js do
   end
 
   context 'Duration chart' do
-    let(:custom_value_stream_name) { "New created value stream" }
-
     before do
       select_group(group)
-
-      create_custom_value_stream(custom_value_stream_name)
+      select_value_stream(custom_value_stream_name)
     end
 
     it 'displays data for all stages on the overview' do
@@ -81,6 +88,7 @@ RSpec.describe 'Value stream analytics charts', :js do
           end
 
           select_group(group)
+          select_value_stream(custom_value_stream_name)
         end
 
         it 'displays the chart' do

ee/spec/features/groups/analytics/cycle_analytics/multiple_value_streams_spec.rb

@@ -18,7 +18,7 @@ RSpec.describe 'Multiple value streams', :js do
 
   let(:extended_form_fields_selector) { '[data-testid="extended-form-fields"]' }
   let(:preset_selector) { '[data-testid="vsa-preset-selector"]' }
-  let!(:default_value_stream) { create(:cycle_analytics_group_value_stream, group: group, name: 'default') }
+  let(:empty_state_selector) { '[data-testid="vsa-empty-state"]' }
 
   3.times do |i|
     let_it_be("issue_#{i}".to_sym) { create(:issue, title: "New Issue #{i}", project: project, created_at: 2.days.ago) }
@@ -198,7 +198,7 @@ RSpec.describe 'Multiple value streams', :js do
     end
   end
 
-  describe 'With a group' do
+  shared_examples 'create group value streams' do
     name = 'group value stream'
 
     before do
@@ -210,7 +210,7 @@ RSpec.describe 'Multiple value streams', :js do
     it_behaves_like 'delete a value stream', name
   end
 
-  describe 'With a sub group' do
+  shared_examples 'create sub group value streams' do
     name = 'sub group value stream'
 
     before do
@@ -221,4 +221,42 @@ RSpec.describe 'Multiple value streams', :js do
     it_behaves_like 'update a value stream', name
     it_behaves_like 'delete a value stream', name
   end
+
+  context 'use_vsa_aggregated_tables feature flag off' do
+    before do
+      stub_feature_flags(use_vsa_aggregated_tables: false)
+    end
+
+    it_behaves_like 'create group value streams'
+    it_behaves_like 'create sub group value streams'
+  end
+
+  context 'use_vsa_aggregated_tables feature flag on' do
+    context 'without a value stream' do
+      before do
+        select_group(group, empty_state_selector)
+      end
+
+      it 'renders the empty state' do
+        expect(page).to have_text(s_('CycleAnalytics|Custom value streams to measure your DevSecOps lifecycle'))
+      end
+
+      it 'can navigate to the create value stream form' do
+        page.find('[data-testid="create-value-stream-button"]').click
+
+        expect(page).to have_selector('[data-testid="value-stream-form-modal"]')
+      end
+    end
+
+    context 'with a value stream' do
+      before do
+        # ensure we have a value stream already available
+        create(:cycle_analytics_group_value_stream, group: group, name: 'default')
+        create(:cycle_analytics_group_value_stream, group: sub_group, name: 'default')
+      end
+
+      it_behaves_like 'create group value streams'
+      it_behaves_like 'create sub group value streams'
+    end
+  end
 end

ee/spec/services/analytics/cycle_analytics/stages/list_service_spec.rb

@@ -19,27 +19,43 @@ RSpec.describe Analytics::CycleAnalytics::Stages::ListService do
     stub_licensed_features(cycle_analytics_for_groups: true)
   end
 
-  it_behaves_like 'permission check for Value Stream Analytics Stage services', :cycle_analytics_for_groups
+  context 'when the use_vsa_aggregated_tables feature is enabled' do
+    before do
+      stub_feature_flags(use_vsa_aggregated_tables: true)
+    end
 
-  it 'returns only the default stages' do
-    expect(stages.size).to eq(Gitlab::Analytics::CycleAnalytics::DefaultStages.all.size)
-  end
+    it_behaves_like 'permission check for Value Stream Analytics Stage services', :cycle_analytics_for_groups
 
-  it 'provides the default stages as non-persisted objects' do
-    expect(stages.map(&:id)).to all(be_nil)
-  end
+    it 'returns empty array' do
+      expect(stages.size).to eq(0)
+    end
+
+    it 'provides the default stages as non-persisted objects' do
+      expect(stages.map(&:id)).to all(be_nil)
+    end
 
-  it 'does not persist the value stream record' do
-    expect { subject }.not_to change { Analytics::CycleAnalytics::GroupValueStream.count }
+    it 'does not persist the value stream record' do
+      expect { subject }.not_to change { Analytics::CycleAnalytics::GroupValueStream.count }
+    end
+
+    context 'when there are persisted stages' do
+      let_it_be(:stage1) { create(:cycle_analytics_group_stage, parent: group, relative_position: 2, value_stream: value_stream) }
+      let_it_be(:stage2) { create(:cycle_analytics_group_stage, parent: group, relative_position: 3, value_stream: value_stream) }
+      let_it_be(:stage3) { create(:cycle_analytics_group_stage, parent: group, relative_position: 1, value_stream: value_stream) }
+
+      it 'returns the persisted stages in order' do
+        expect(stages).to eq([stage3, stage1, stage2])
+      end
+    end
   end
 
-  context 'when there are persisted stages' do
-    let_it_be(:stage1) { create(:cycle_analytics_group_stage, parent: group, relative_position: 2, value_stream: value_stream) }
-    let_it_be(:stage2) { create(:cycle_analytics_group_stage, parent: group, relative_position: 3, value_stream: value_stream) }
-    let_it_be(:stage3) { create(:cycle_analytics_group_stage, parent: group, relative_position: 1, value_stream: value_stream) }
+  context 'when the use_vsa_aggregated_tables feature is disabled' do
+    before do
+      stub_feature_flags(use_vsa_aggregated_tables: false)
+    end
 
-    it 'returns the persisted stages in order' do
-      expect(stages).to eq([stage3, stage1, stage2])
+    it 'returns the default stages' do
+      expect(stages.size).to eq(Gitlab::Analytics::CycleAnalytics::DefaultStages.all.size)
     end
   end
 end

ee/spec/support/shared_examples/controllers/analytics/cycle_analytics/shared_stage_shared_examples.rb

@@ -22,7 +22,7 @@ RSpec.shared_examples 'Value Stream Analytics Stages controller' do
       subject
 
       response_start_events = json_response['stages'].map { |s| s['start_event_identifier'] }
-      start_events = Gitlab::Analytics::CycleAnalytics::DefaultStages.all.map { |s| s['start_event_identifier'] }
+      start_events = stages.map { |s| s['start_event_identifier'] }
 
       expect(response_start_events).to eq(start_events)
     end

spec/support/helpers/cycle_analytics_helpers.rb

@@ -86,6 +86,13 @@ module CycleAnalyticsHelpers
     wait_for_stages_to_load(ready_selector)
   end
 
+  def select_value_stream(value_stream_name)
+    toggle_value_stream_dropdown
+
+    page.find('[data-testid="dropdown-value-streams"]').all('li button').find { |item| item.text == value_stream_name.to_s }.click
+    wait_for_requests
+  end
+
   def toggle_dropdown(field)
     page.within("[data-testid*='#{field}']") do
       find('.dropdown-toggle').click