Add daily coverage data new finder

This commit introduces a new finder which will be used to
fetch our daily coverage data at the project and group level.

app/controllers/projects/ci/daily_build_group_report_results_controller.rb

@@ -40,8 +40,26 @@ class Projects::Ci::DailyBuildGroupReportResultsController < Projects::Applicati
   end
 
   def report_results
+    if ::Gitlab::Ci::Features.use_coverage_data_new_finder?(project)
+      ::Ci::Testing::DailyBuildGroupReportResultsFinder.new(
+        params: new_finder_params,
+        current_user: current_user
+      ).execute
+    else
       Ci::DailyBuildGroupReportResultsFinder.new(**finder_params).execute
     end
+  end
+
+  def new_finder_params
+    {
+      project: project,
+      coverage: true,
+      start_date: start_date,
+      end_date: end_date,
+      ref_path: params[:ref_path],
+      sort: true
+    }
+  end
 
   def finder_params
     {

app/finders/ci/testing/daily_build_group_report_results_finder.rb

+# frozen_string_literal: true
+
+# DailyBuildGroupReportResultsFinder
+#
+# Used to filter DailyBuildGroupReportResults by set of params
+#
+# Arguments:
+#   current_user
+#   params:
+#     project: integer
+#     group: integer
+#     coverage: boolean
+#     ref_path: string
+#     start_date: date
+#     end_date: date
+#     sort: boolean
+#     limit: integer
+
+module Ci
+  module Testing
+    class DailyBuildGroupReportResultsFinder
+      include Gitlab::Allowable
+
+      MAX_ITEMS = 1_000
+
+      attr_reader :params, :current_user
+
+      def initialize(params: {}, current_user: nil)
+        @params = params
+        @current_user = current_user
+      end
+
+      def execute
+        return Ci::DailyBuildGroupReportResult.none unless query_allowed?
+
+        collection = Ci::DailyBuildGroupReportResult.by_projects(params[:project])
+        collection = filter_report_results(collection)
+        collection
+      end
+
+      private
+
+      def query_allowed?
+        can?(current_user, :read_build_report_results, params[:project])
+      end
+
+      def filter_report_results(collection)
+        collection = by_coverage(collection)
+        collection = by_ref_path(collection)
+        collection = by_dates(collection)
+
+        collection = sort(collection)
+        collection = limit_by(collection)
+        collection
+      end
+
+      def by_coverage(items)
+        params[:coverage].present? ? items.with_coverage : items
+      end
+
+      def by_ref_path(items)
+        params[:ref_path].present? ? items.by_ref_path(params[:ref_path]) : items.with_default_branch
+      end
+
+      def by_dates(items)
+        params[:start_date].present? && params[:end_date].present? ? items.by_dates(params[:start_date], params[:end_date]) : items
+      end
+
+      def sort(items)
+        params[:sort].present? ? items.ordered_by_date_and_group_name : items
+      end
+
+      # rubocop: disable CodeReuse/ActiveRecord
+      def limit_by(items)
+        items.limit(limit)
+      end
+      # rubocop: enable CodeReuse/ActiveRecord
+
+      def limit
+        return MAX_ITEMS unless params[:limit].present?
+
+        [params[:limit].to_i, MAX_ITEMS].min
+      end
+    end
+  end
+end

app/models/ci/daily_build_group_report_result.rb

@@ -13,10 +13,13 @@ module Ci
     validates :data, json_schema: { filename: "daily_build_group_report_result_data" }
 
     scope :with_included_projects, -> { includes(:project) }
+    scope :by_ref_path, -> (ref_path) { where(ref_path: ref_path) }
     scope :by_projects, -> (ids) { where(project_id: ids) }
     scope :with_coverage, -> { where("(data->'coverage') IS NOT NULL") }
     scope :with_default_branch, -> { where(default_branch: true) }
     scope :by_date, -> (start_date) { where(date: report_window(start_date)..Date.current) }
+    scope :by_dates, -> (start_date, end_date) { where(date: start_date..end_date) }
+    scope :ordered_by_date_and_group_name, -> { order(date: :desc, group_name: :asc) }
 
     store_accessor :data, :coverage
 

config/feature_flags/development/coverage_data_new_finder.yml

+---
+name: coverage_data_new_finder
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/53670
+rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/301093
+milestone: '13.9'
+type: development
+group: group::testing
+default_enabled: false

lib/gitlab/ci/features.rb

@@ -75,6 +75,10 @@ module Gitlab
       def self.display_codequality_backend_comparison?(project)
         ::Feature.enabled?(:codequality_backend_comparison, project, default_enabled: :yaml)
       end
+
+      def self.use_coverage_data_new_finder?(record)
+        ::Feature.enabled?(:coverage_data_new_finder, record, default_enabled: :yaml)
+      end
     end
   end
 end

spec/controllers/projects/ci/daily_build_group_report_results_controller_spec.rb

@@ -11,6 +11,7 @@ RSpec.describe Projects::Ci::DailyBuildGroupReportResultsController do
     let(:end_date) { '2020-03-09' }
     let(:allowed_to_read) { true }
     let(:user) { create(:user) }
+    let(:feature_enabled?) { true }
 
     before do
       create_daily_coverage('rspec', 79.0, '2020-03-09')
@@ -24,6 +25,8 @@ RSpec.describe Projects::Ci::DailyBuildGroupReportResultsController do
       allow(Ability).to receive(:allowed?).and_call_original
       allow(Ability).to receive(:allowed?).with(user, :read_build_report_results, project).and_return(allowed_to_read)
 
+      stub_feature_flags(coverage_data_new_finder: feature_enabled?)
+
       get :index, params: {
         namespace_id: project.namespace,
         project_id: project,
@@ -55,9 +58,7 @@ RSpec.describe Projects::Ci::DailyBuildGroupReportResultsController do
       end
     end
 
-    context 'when format is CSV' do
-      let(:format) { :csv }
-
+    shared_examples 'CSV results' do
       it 'serves the results in CSV' do
         expect(response).to have_gitlab_http_status(:ok)
         expect(response.headers['Content-Type']).to eq('text/csv; charset=utf-8')
@@ -88,9 +89,7 @@ RSpec.describe Projects::Ci::DailyBuildGroupReportResultsController do
       it_behaves_like 'ensuring policy'
     end
 
-    context 'when format is JSON' do
-      let(:format) { :json }
-
+    shared_examples 'JSON results' do
       it 'serves the results in JSON' do
         expect(response).to have_gitlab_http_status(:ok)
 
@@ -137,6 +136,38 @@ RSpec.describe Projects::Ci::DailyBuildGroupReportResultsController do
       it_behaves_like 'validating param_type'
       it_behaves_like 'ensuring policy'
     end
+
+    context 'when format is JSON' do
+      let(:format) { :json }
+
+      context 'when coverage_data_new_finder flag is enabled' do
+        let(:feature_enabled?) { true }
+
+        it_behaves_like 'JSON results'
+      end
+
+      context 'when coverage_data_new_finder flag is disabled' do
+        let(:feature_enabled?) { false }
+
+        it_behaves_like 'JSON results'
+      end
+    end
+
+    context 'when format is CSV' do
+      let(:format) { :csv }
+
+      context 'when coverage_data_new_finder flag is enabled' do
+        let(:feature_enabled?) { true }
+
+        it_behaves_like 'CSV results'
+      end
+
+      context 'when coverage_data_new_finder flag is disabled' do
+        let(:feature_enabled?) { false }
+
+        it_behaves_like 'CSV results'
+      end
+    end
   end
 
   def create_daily_coverage(group_name, coverage, date)

spec/finders/ci/testing/daily_build_group_report_results_finder_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Ci::Testing::DailyBuildGroupReportResultsFinder do
+  describe '#execute' do
+    let_it_be(:project) { create(:project, :private) }
+    let(:user_without_permission) { create(:user) }
+    let_it_be(:user_with_permission) { project.owner }
+    let_it_be(:ref_path) { 'refs/heads/master' }
+    let(:limit) { nil }
+    let_it_be(:default_branch) { false }
+    let(:start_date) { '2020-03-09' }
+    let(:end_date) { '2020-03-10' }
+    let(:sort) { true }
+
+    let_it_be(:rspec_coverage_1) { create_daily_coverage('rspec', 79.0, '2020-03-09') }
+    let_it_be(:karma_coverage_1) { create_daily_coverage('karma', 89.0, '2020-03-09') }
+    let_it_be(:rspec_coverage_2) { create_daily_coverage('rspec', 95.0, '2020-03-10') }
+    let_it_be(:karma_coverage_2) { create_daily_coverage('karma', 92.0, '2020-03-10') }
+    let_it_be(:rspec_coverage_3) { create_daily_coverage('rspec', 97.0, '2020-03-11') }
+    let_it_be(:karma_coverage_3) { create_daily_coverage('karma', 99.0, '2020-03-11') }
+
+    let(:finder) { described_class.new(params: params, current_user: current_user) }
+
+    let(:params) do
+      {
+        project: project,
+        coverage: true,
+        ref_path: ref_path,
+        start_date: start_date,
+        end_date: end_date,
+        limit: limit,
+        sort: sort
+      }
+    end
+
+    subject(:coverages) { finder.execute }
+
+    context 'when params are provided' do
+      context 'when current user is not allowed to read data' do
+        let(:current_user) { user_without_permission }
+
+        it 'returns an empty collection' do
+          expect(coverages).to be_empty
+        end
+      end
+
+      context 'when current user is allowed to read data' do
+        let(:current_user) { user_with_permission }
+
+        it 'returns matching coverages within the given date range' do
+          expect(coverages).to match_array([
+            karma_coverage_2,
+            rspec_coverage_2,
+            karma_coverage_1,
+            rspec_coverage_1
+          ])
+        end
+
+        context 'when ref_path is nil' do
+          let(:default_branch) { true }
+          let(:ref_path) { nil }
+
+          it 'returns coverages for the default branch' do
+            rspec_coverage_4 = create_daily_coverage('rspec', 66.0, '2020-03-10')
+
+            expect(coverages).to contain_exactly(rspec_coverage_4)
+          end
+        end
+
+        context 'when limit is specified' do
+          let(:limit) { 2 }
+
+          it 'returns limited number of matching coverages within the given date range' do
+            expect(coverages).to match_array([
+              karma_coverage_2,
+              rspec_coverage_2
+            ])
+          end
+        end
+      end
+    end
+  end
+
+  private
+
+  def create_daily_coverage(group_name, coverage, date)
+    create(
+      :ci_daily_build_group_report_result,
+      project: project,
+      ref_path: ref_path || 'feature-branch',
+      group_name: group_name,
+      data: { 'coverage' => coverage },
+      date: date,
+      default_branch: default_branch
+    )
+  end
+end

spec/models/ci/daily_build_group_report_result_spec.rb

@@ -97,6 +97,35 @@ RSpec.describe Ci::DailyBuildGroupReportResult do
       end
     end
 
+    describe '.by_ref_path' do
+      subject(:coverages) { described_class.by_ref_path(recent_build_group_report_result.ref_path) }
+
+      it 'returns coverages by ref_path' do
+        expect(coverages).to contain_exactly(recent_build_group_report_result, old_build_group_report_result)
+      end
+    end
+
+    describe '.ordered_by_date_and_group_name' do
+      subject(:coverages) { described_class.ordered_by_date_and_group_name }
+
+      it 'returns coverages ordered by data and group name' do
+        expect(subject).to contain_exactly(recent_build_group_report_result, old_build_group_report_result)
+      end
+    end
+
+    describe '.by_dates' do
+      subject(:coverages) { described_class.by_dates(start_date, end_date) }
+
+      context 'when daily coverages exist during those dates' do
+        let(:start_date) { 1.day.ago.to_date.to_s }
+        let(:end_date) { Date.current.to_s }
+
+        it 'returns coverages' do
+          expect(coverages).to contain_exactly(recent_build_group_report_result)
+        end
+      end
+    end
+
     describe '.with_coverage' do
       subject { described_class.with_coverage }