Add code coverage summary resolver

This commit moves our code coverage summary resolver to its own
resolver class. It also changes the type of our lastUpdatedAt field
to a date field.

doc/api/graphql/reference/gitlab_schema.graphql

@@ -2779,7 +2779,7 @@ type CodeCoverageSummary {
   """
   Latest date when the code coverage was created for the project.
   """
-  lastUpdatedAt: Time
+  lastUpdatedOn: Date
 }
 
 type Commit {

doc/api/graphql/reference/gitlab_schema.json

@@ -7580,14 +7580,14 @@
               "deprecationReason": null
             },
             {
-              "name": "lastUpdatedAt",
+              "name": "lastUpdatedOn",
               "description": "Latest date when the code coverage was created for the project.",
               "args": [
 
               ],
               "type": {
                 "kind": "SCALAR",
-                "name": "Time",
+                "name": "Date",
                 "ofType": null
               },
               "isDeprecated": false,

doc/api/graphql/reference/index.md

@@ -437,7 +437,7 @@ Represents the code coverage summary for a project.
 | ----- | ---- | ----------- |
 | `averageCoverage` | Float | Average percentage of the different code coverage results available for the project. |
 | `coverageCount` | Int | Number of different code coverage results available. |
-| `lastUpdatedAt` | Time | Latest date when the code coverage was created for the project. |
+| `lastUpdatedOn` | Date | Latest date when the code coverage was created for the project. |
 
 ### Commit
 

ee/app/graphql/ee/types/project_type.rb

@@ -146,23 +146,9 @@ module EE
               ::Types::Ci::CodeCoverageSummaryType,
               null: true,
               description: 'Code coverages summary associated with the project',
+              resolver: ::Resolvers::Ci::CodeCoverageSummaryResolver,
               feature_flag: :group_coverage_data_report
 
-        def code_coverage_summary
-          BatchLoader::GraphQL.for(project.id).batch do |project_ids, loader|
-            results = ::Ci::DailyBuildGroupReportResult
-              .by_projects(project_ids)
-              .with_coverage
-              .with_default_branch
-              .latest
-              .summaries_per_project
-
-            results.each do |project_id, summary|
-              loader.call(project_id, summary)
-            end
-          end
-        end
-
         def self.sast_ci_configuration(project)
           ::Security::CiConfiguration::SastParserService.new(project).configuration
         end

ee/app/graphql/resolvers/ci/code_coverage_summary_resolver.rb

+# frozen_string_literal: true
+
+module Resolvers
+  module Ci
+    class CodeCoverageSummaryResolver < BaseResolver
+      type ::Types::Ci::CodeCoverageSummaryType, null: true
+
+      alias_method :project, :object
+
+      def resolve(**args)
+        BatchLoader::GraphQL.for(project.id).batch do |project_ids, loader|
+          results = ::Ci::DailyBuildGroupReportResult
+            .by_projects(project_ids)
+            .with_coverage
+            .with_default_branch
+            .latest
+            .summaries_per_project
+
+          results.each do |project_id, summary|
+            loader.call(project_id, summary)
+          end
+        end
+      end
+    end
+  end
+end

ee/app/graphql/types/ci/code_coverage_summary_type.rb

@@ -13,7 +13,7 @@ module Types
       field :coverage_count, GraphQL::INT_TYPE, null: true,
             description: 'Number of different code coverage results available.'
 
-      field :last_updated_at, Types::TimeType, null: true,
+      field :last_updated_on, Types::DateType, null: true,
             description: 'Latest date when the code coverage was created for the project.'
     end
   end

ee/app/models/ee/ci/daily_build_group_report_result.rb

@@ -30,7 +30,7 @@ module EE
             result[project_id] = {
               average_coverage: average_coverage,
               coverage_count: coverage_count,
-              last_updated_at: date
+              last_updated_on: date
             }
           end
         end

ee/spec/graphql/resolvers/ci/code_coverage_summary_resolver_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Resolvers::Ci::CodeCoverageSummaryResolver do
+  include GraphqlHelpers
+
+  describe '#resolve' do
+    let_it_be(:current_user) { create(:user) }
+    let_it_be(:project) { create(:project) }
+
+    context 'when project has coverage' do
+      let!(:coverage_1) { create(:ci_daily_build_group_report_result, project: project) }
+      let!(:coverage_2) { create(:ci_daily_build_group_report_result, project: project, group_name: 'karma') }
+
+      let(:expected_results) do
+        {
+          average_coverage: 77.0,
+          coverage_count: 2,
+          last_updated_on: Date.current
+        }
+      end
+
+      it 'returns coverage summary for the project as a batch' do
+        results = batch_sync do
+          resolve_coverages
+        end
+
+        expect(results).to eq(expected_results)
+      end
+    end
+
+    context 'when project does not have coverage' do
+      it 'returns nil' do
+        results = batch_sync do
+          resolve_coverages
+        end
+
+        expect(results).to be_nil
+      end
+    end
+  end
+
+  def resolve_coverages(args = {}, context = { current_user: current_user })
+    resolve(described_class, obj: project, args: args, ctx: context)
+  end
+end

ee/spec/graphql/types/ci/code_coverage_summary_spec.rb

@@ -6,7 +6,7 @@ RSpec.describe GitlabSchema.types['CodeCoverageSummary'] do
   it { expect(described_class.graphql_name).to eq('CodeCoverageSummary') }
 
   describe 'fields' do
-    let(:fields) { %i[average_coverage coverage_count last_updated_at] }
+    let(:fields) { %i[average_coverage coverage_count last_updated_on] }
 
     it { expect(described_class).to have_graphql_fields(fields) }
   end

ee/spec/models/ci/daily_build_group_report_result_spec.rb

@@ -36,12 +36,12 @@ RSpec.describe Ci::DailyBuildGroupReportResult do
             project.id => {
               average_coverage: 71.5,
               coverage_count: 2,
-              last_updated_at: recent_build_group_report_result.date
+              last_updated_on: recent_build_group_report_result.date
             },
             project_2.id => {
               average_coverage: 78.0,
               coverage_count: 1,
-              last_updated_at: build_group_report_result_2.date
+              last_updated_on: build_group_report_result_2.date
             }
           }
 

ee/spec/requests/api/graphql/project/code_coverage_summary_spec.rb

@@ -16,7 +16,7 @@ RSpec.describe 'Getting code coverage summary in a project' do
       codeCoverageSummary {
         averageCoverage
         coverageCount
-        lastUpdatedAt
+        lastUpdatedOn
       }
     }
     QUERY
@@ -45,7 +45,7 @@ RSpec.describe 'Getting code coverage summary in a project' do
 
         expect(code_coverage_summary_graphql_data.dig('averageCoverage')).to eq(77.0)
         expect(code_coverage_summary_graphql_data.dig('coverageCount')).to eq(1)
-        expect(code_coverage_summary_graphql_data.dig('lastUpdatedAt')).to eq(daily_build_group_report_result.date.to_s)
+        expect(code_coverage_summary_graphql_data.dig('lastUpdatedOn')).to eq(daily_build_group_report_result.date.to_s)
       end
     end