Created compliance violation GraphQL type and added to Group type

- Created compliance violation type
- Created compliance violation resolver
- Created compliance violation policy
- Created compliance violation finder to resolve the GraphQL query
- Updated compliance violation model to filter by group
- Added enums to GraphQL
- Updated GraphQL docs
- Created specs

Changelog: added
MR: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/80995
EE: true

doc/api/graphql/reference/index.md

@@ -5967,6 +5967,29 @@ The edge type for [`ComplianceFramework`](#complianceframework).
 | <a id="complianceframeworkedgecursor"></a>`cursor` | [`String!`](#string) | A cursor for use in pagination. |
 | <a id="complianceframeworkedgenode"></a>`node` | [`ComplianceFramework`](#complianceframework) | The item at the end of the edge. |
 
+#### `ComplianceViolationConnection`
+
+The connection type for [`ComplianceViolation`](#complianceviolation).
+
+##### Fields
+
+| Name | Type | Description |
+| ---- | ---- | ----------- |
+| <a id="complianceviolationconnectionedges"></a>`edges` | [`[ComplianceViolationEdge]`](#complianceviolationedge) | A list of edges. |
+| <a id="complianceviolationconnectionnodes"></a>`nodes` | [`[ComplianceViolation]`](#complianceviolation) | A list of nodes. |
+| <a id="complianceviolationconnectionpageinfo"></a>`pageInfo` | [`PageInfo!`](#pageinfo) | Information to aid in pagination. |
+
+#### `ComplianceViolationEdge`
+
+The edge type for [`ComplianceViolation`](#complianceviolation).
+
+##### Fields
+
+| Name | Type | Description |
+| ---- | ---- | ----------- |
+| <a id="complianceviolationedgecursor"></a>`cursor` | [`String!`](#string) | A cursor for use in pagination. |
+| <a id="complianceviolationedgenode"></a>`node` | [`ComplianceViolation`](#complianceviolation) | The item at the end of the edge. |
+
 #### `ConnectedAgentConnection`
 
 The connection type for [`ConnectedAgent`](#connectedagent).
@@ -9499,6 +9522,20 @@ Represents a ComplianceFramework associated with a Project.
 | <a id="complianceframeworkname"></a>`name` | [`String!`](#string) | Name of the compliance framework. |
 | <a id="complianceframeworkpipelineconfigurationfullpath"></a>`pipelineConfigurationFullPath` | [`String`](#string) | Full path of the compliance pipeline configuration stored in a project repository, such as `.gitlab/.compliance-gitlab-ci.yml@compliance/hipaa` **(ULTIMATE)**. |
 
+### `ComplianceViolation`
+
+Compliance violation associated with a merged merge request. Available only when feature flag `compliance_violations_graphql_type` is enabled. This flag is disabled by default, because the feature is experimental and is subject to change without notice.
+
+#### Fields
+
+| Name | Type | Description |
+| ---- | ---- | ----------- |
+| <a id="complianceviolationid"></a>`id` | [`ID!`](#id) | Compliance violation ID. |
+| <a id="complianceviolationmergerequest"></a>`mergeRequest` | [`MergeRequest!`](#mergerequest) | Merge request the compliance violation occurred in. |
+| <a id="complianceviolationreason"></a>`reason` | [`ComplianceViolationReason!`](#complianceviolationreason) | Reason the compliance violation occurred. |
+| <a id="complianceviolationseveritylevel"></a>`severityLevel` | [`ComplianceViolationSeverity!`](#complianceviolationseverity) | Severity of the compliance violation. |
+| <a id="complianceviolationviolatinguser"></a>`violatingUser` | [`UserCore!`](#usercore) | User suspected of causing the compliance violation. |
+
 ### `ComposerMetadata`
 
 Composer metadata.
@@ -11054,6 +11091,7 @@ four standard [pagination arguments](#connection-pagination-arguments):
 | <a id="groupistemporarystorageincreaseenabled"></a>`isTemporaryStorageIncreaseEnabled` | [`Boolean!`](#boolean) | Status of the temporary storage increase. |
 | <a id="grouplfsenabled"></a>`lfsEnabled` | [`Boolean`](#boolean) | Indicates if Large File Storage (LFS) is enabled for namespace. |
 | <a id="groupmentionsdisabled"></a>`mentionsDisabled` | [`Boolean`](#boolean) | Indicates if a group is disabled from getting mentioned. |
+| <a id="groupmergerequestviolations"></a>`mergeRequestViolations` | [`ComplianceViolationConnection`](#complianceviolationconnection) | Compliance violations reported on merge requests merged within the group. Available only when feature flag `compliance_violations_graphql_type` is enabled. This flag is disabled by default, because the feature is experimental and is subject to change without notice. (see [Connections](#connections)) |
 | <a id="groupname"></a>`name` | [`String!`](#string) | Name of the namespace. |
 | <a id="grouporganizations"></a>`organizations` | [`CustomerRelationsOrganizationConnection`](#customerrelationsorganizationconnection) | Find organizations of this group. (see [Connections](#connections)) |
 | <a id="grouppackagesettings"></a>`packageSettings` | [`PackageSettings`](#packagesettings) | Package settings for the namespace. |
@@ -17077,6 +17115,28 @@ Mode of a commit action.
 | <a id="commitencodingbase64"></a>`BASE64` | Base64 encoding. |
 | <a id="commitencodingtext"></a>`TEXT` | Text encoding. |
 
+### `ComplianceViolationReason`
+
+Reason for the compliance violation.
+
+| Value | Description |
+| ----- | ----------- |
+| <a id="complianceviolationreasonapproved_by_committer"></a>`APPROVED_BY_COMMITTER` | Approved by committer. |
+| <a id="complianceviolationreasonapproved_by_insufficient_users"></a>`APPROVED_BY_INSUFFICIENT_USERS` | Approved by insufficient users. |
+| <a id="complianceviolationreasonapproved_by_merge_request_author"></a>`APPROVED_BY_MERGE_REQUEST_AUTHOR` | Approved by merge request author. |
+
+### `ComplianceViolationSeverity`
+
+Severity of the compliance violation.
+
+| Value | Description |
+| ----- | ----------- |
+| <a id="complianceviolationseveritycritical"></a>`CRITICAL` | Critical severity. |
+| <a id="complianceviolationseverityhigh"></a>`HIGH` | High severity. |
+| <a id="complianceviolationseverityinfo"></a>`INFO` | Info severity. |
+| <a id="complianceviolationseveritylow"></a>`LOW` | Low severity. |
+| <a id="complianceviolationseveritymedium"></a>`MEDIUM` | Medium severity. |
+
 ### `ConanMetadatumFileTypeEnum`
 
 Conan file types.

ee/app/finders/compliance_management/merge_requests/compliance_violations_finder.rb

+# frozen_string_literal: true
+
+# ComplianceManagement::MergeRequests::ComplianceViolationsFinder
+#
+# Used by the API to filter Compliance Violation records created from merge requests merged within a group
+#
+# Arguments:
+#   current_user: the current user to validate they have the right permissions to access the compliance violations data
+#   group_id: the ID of the group to search within
+
+module ComplianceManagement
+  module MergeRequests
+    class ComplianceViolationsFinder
+      include FinderMethods
+      include MergedAtFilter
+
+      def initialize(current_user:, group:)
+        @current_user = current_user
+        @group = group
+      end
+
+      def execute
+        return ::MergeRequests::ComplianceViolation.none unless allowed?
+
+        ::MergeRequests::ComplianceViolation.by_group(group).order_by_severity_level(:desc)
+      end
+
+      private
+
+      attr_reader :current_user, :group
+
+      def allowed?
+        ::Feature.enabled?(:compliance_violations_graphql_type, group, default_enabled: :yaml) &&
+          Ability.allowed?(current_user, :read_group_compliance_dashboard, group)
+      end
+    end
+  end
+end

ee/app/graphql/ee/types/group_type.rb

@@ -98,6 +98,13 @@ module EE
               null: true,
               description: 'External locations that receive audit events belonging to the group.',
               authorize: :admin_external_audit_events
+
+        field :merge_request_violations,
+              ::Types::ComplianceManagement::MergeRequests::ComplianceViolationType.connection_type,
+              null: true,
+              description: 'Compliance violations reported on merge requests merged within the group.' \
+                           ' Available only when feature flag `compliance_violations_graphql_type` is enabled. This flag is disabled by default, because the feature is experimental and is subject to change without notice.',
+              resolver: ::Resolvers::ComplianceManagement::MergeRequests::ComplianceViolationResolver
       end
     end
   end

ee/app/graphql/resolvers/compliance_management/merge_requests/compliance_violation_resolver.rb

+# frozen_string_literal: true
+
+module Resolvers
+  module ComplianceManagement
+    module MergeRequests
+      class ComplianceViolationResolver < BaseResolver
+        alias_method :group, :object
+
+        type ::Types::ComplianceManagement::MergeRequests::ComplianceViolationType.connection_type, null: true
+        description 'Compliance violations reported on a merged merge request.'
+
+        def resolve
+          ::ComplianceManagement::MergeRequests::ComplianceViolationsFinder.new(current_user: current_user, group: group).execute
+        end
+      end
+    end
+  end
+end

ee/app/graphql/types/compliance_management/merge_requests/compliance_violation_reason_enum.rb

+# frozen_string_literal: true
+
+module Types
+  module ComplianceManagement
+    module MergeRequests
+      class ComplianceViolationReasonEnum < BaseEnum
+        graphql_name 'ComplianceViolationReason'
+        description 'Reason for the compliance violation.'
+
+        ::Enums::MergeRequests::ComplianceViolation.reasons.keys.each do |reason|
+          value reason.to_s.upcase, value: reason.to_s, description: "#{reason.to_s.humanize}"
+        end
+      end
+    end
+  end
+end

ee/app/graphql/types/compliance_management/merge_requests/compliance_violation_severity_enum.rb

+# frozen_string_literal: true
+
+module Types
+  module ComplianceManagement
+    module MergeRequests
+      class ComplianceViolationSeverityEnum < BaseEnum
+        graphql_name 'ComplianceViolationSeverity'
+        description 'Severity of the compliance violation.'
+
+        ::Enums::MergeRequests::ComplianceViolation.severity_levels.keys.each do |severity|
+          value severity.to_s.upcase, value: severity.to_s, description: "#{severity.to_s.humanize} severity"
+        end
+      end
+    end
+  end
+end

ee/app/graphql/types/compliance_management/merge_requests/compliance_violation_type.rb

+# frozen_string_literal: true
+
+module Types
+  module ComplianceManagement
+    module MergeRequests
+      class ComplianceViolationType < ::Types::BaseObject
+        graphql_name 'ComplianceViolation'
+        description 'Compliance violation associated with a merged merge request.' \
+                    ' Available only when feature flag `compliance_violations_graphql_type` is enabled. This flag is disabled by default, because the feature is experimental and is subject to change without notice.'
+
+        authorize :read_group_compliance_dashboard
+
+        field :id, GraphQL::Types::ID, null: false,
+              description: 'Compliance violation ID.'
+
+        field :severity_level, ComplianceViolationSeverityEnum, null: false,
+              description: 'Severity of the compliance violation.'
+
+        field :reason, ComplianceViolationReasonEnum, null: false,
+              description: 'Reason the compliance violation occurred.'
+
+        field :violating_user, ::Types::UserType, null: false,
+              description: 'User suspected of causing the compliance violation.'
+
+        field :merge_request, ::Types::MergeRequestType, null: false,
+              description: 'Merge request the compliance violation occurred in.'
+      end
+    end
+  end
+end

ee/app/models/merge_requests/compliance_violation.rb

@@ -9,7 +9,13 @@ module MergeRequests
     enum reason: ::Enums::MergeRequests::ComplianceViolation.reasons
     enum severity_level: ::Enums::MergeRequests::ComplianceViolation.severity_levels
 
-    scope :approved_by_committer, -> { where(reason: ::Gitlab::ComplianceManagement::Violations::ApprovedByCommitter::REASON) }
+    scope :with_merge_requests, -> { preload(merge_request: [{ target_project: :namespace }, :metrics]) }
+    scope :join_projects, -> { with_merge_requests.joins(merge_request: { target_project: :namespace }) }
+
+    scope :by_approved_by_committer, -> { where(reason: ::Gitlab::ComplianceManagement::Violations::ApprovedByCommitter::REASON) }
+    scope :by_group, -> (group) { join_projects.where(merge_requests: { projects: { namespace_id: group.self_and_descendants } }) }
+
+    scope :order_by_severity_level, -> (direction) { order(severity_level: direction, id: direction) }
 
     belongs_to :violating_user, class_name: 'User'
     belongs_to :merge_request

ee/app/policies/merge_requests/compliance_violation_policy.rb

+# frozen_string_literal: true
+
+module MergeRequests
+  class ComplianceViolationPolicy < BasePolicy
+    delegate { @subject.merge_request.target_project.namespace }
+  end
+end

ee/lib/gitlab/compliance_management/violations/approved_by_committer.rb

@@ -43,7 +43,7 @@ module Gitlab
 
         # rubocop: disable CodeReuse/ActiveRecord
         def existing_violating_user_ids
-          @merge_request.compliance_violations.approved_by_committer.pluck(:violating_user_id)
+          @merge_request.compliance_violations.by_approved_by_committer.pluck(:violating_user_id)
         end
         # rubocop: enable CodeReuse/ActiveRecord
       end

ee/spec/finders/compliance_management/merge_requests/compliance_violations_finder_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe ComplianceManagement::MergeRequests::ComplianceViolationsFinder do
+  let_it_be(:current_user) { create(:user) }
+  let_it_be(:group) { create(:group) }
+  let_it_be(:project) { create(:project, :repository, group: group) }
+  let_it_be(:project2) { create(:project, :repository, group: group) }
+  let_it_be(:project_outside_group) { create(:project, :repository, group: create(:group)) }
+  let_it_be(:merge_request) { create(:merge_request, source_project: project, target_project: project, state: :merged) }
+  let_it_be(:merge_request2) { create(:merge_request, source_project: project2, target_project: project2, state: :merged) }
+  let_it_be(:merge_request_outside_group) { create(:merge_request, source_project: project_outside_group, target_project: project_outside_group, state: :merged) }
+  let_it_be(:compliance_violation) { create(:compliance_violation, :approved_by_committer, severity_level: :low, merge_request: merge_request) }
+  let_it_be(:compliance_violation2) { create(:compliance_violation, :approved_by_merge_request_author, severity_level: :high, merge_request: merge_request2) }
+  let_it_be(:compliance_violation_outside_group) { create(:compliance_violation, :approved_by_committer, merge_request: merge_request_outside_group) }
+
+  subject(:finder) { described_class.new(current_user: current_user, group: group) }
+
+  describe '#execute' do
+    subject { finder.execute }
+
+    context 'when feature is disabled' do
+      before do
+        stub_feature_flags(compliance_violations_graphql_type: false)
+      end
+
+      it 'returns no compliance violations' do
+        expect(subject).to eq(::MergeRequests::ComplianceViolation.none)
+      end
+    end
+
+    context 'when feature is enabled' do
+      before do
+        stub_feature_flags(compliance_violations_graphql_type: true)
+      end
+
+      context 'when the user is unauthorized' do
+        it 'returns no compliance violations' do
+          expect(subject).to eq(::MergeRequests::ComplianceViolation.none)
+        end
+      end
+
+      context 'when the user is authorized' do
+        before do
+          group.add_owner(current_user)
+        end
+
+        context 'without any filters or sorting' do
+          it 'finds all the compliance violations' do
+            expect(subject).to contain_exactly(compliance_violation, compliance_violation2)
+          end
+        end
+      end
+    end
+  end
+end

ee/spec/graphql/ee/types/group_type_spec.rb

@@ -21,6 +21,7 @@ RSpec.describe GitlabSchema.types['Group'] do
   it { expect(described_class).to have_graphql_field(:stats) }
   it { expect(described_class).to have_graphql_field(:billable_members_count) }
   it { expect(described_class).to have_graphql_field(:external_audit_event_destinations) }
+  it { expect(described_class).to have_graphql_field(:merge_request_violations) }
 
   describe 'vulnerabilities' do
     let_it_be(:group) { create(:group) }

ee/spec/graphql/resolvers/compliance_management/merge_requests/compliance_violation_resolver_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Resolvers::ComplianceManagement::MergeRequests::ComplianceViolationResolver do
+  include GraphqlHelpers
+
+  let_it_be(:current_user) { create(:user) }
+  let_it_be(:group) { create(:group) }
+  let_it_be(:project) { create(:project, :repository, group: group) }
+  let_it_be(:project2) { create(:project, :repository, group: group) }
+  let_it_be(:project_outside_group) { create(:project, :repository, group: create(:group)) }
+  let_it_be(:merge_request) { create(:merge_request, source_project: project, target_project: project, state: :merged) }
+  let_it_be(:merge_request2) { create(:merge_request, source_project: project2, target_project: project2, state: :merged) }
+  let_it_be(:merge_request_outside_group) { create(:merge_request, source_project: project_outside_group, target_project: project_outside_group, state: :merged) }
+  let_it_be(:compliance_violation) { create(:compliance_violation, :approved_by_committer, severity_level: :low, merge_request: merge_request) }
+  let_it_be(:compliance_violation2) { create(:compliance_violation, :approved_by_merge_request_author, severity_level: :high, merge_request: merge_request2) }
+  let_it_be(:compliance_violation_outside_group) { create(:compliance_violation, :approved_by_committer, merge_request: merge_request_outside_group) }
+
+  describe '#resolve' do
+    subject(:resolve_compliance_violations) { resolve(described_class, obj: group, ctx: { current_user: current_user }) }
+
+    context 'feature flag is disabled' do
+      before do
+        stub_feature_flags(compliance_violations_graphql_type: false)
+      end
+
+      it 'returns an empty collection' do
+        expect(subject).to be_empty
+      end
+    end
+
+    context 'feature flag is enabled' do
+      context 'user is unauthorized' do
+        it 'returns an empty collection' do
+          expect(subject).to be_empty
+        end
+      end
+
+      context 'user is authorized' do
+        before do
+          group.add_owner(current_user)
+        end
+
+        context 'without any filters or sorting' do
+          it 'finds all the compliance violations' do
+            expect(subject).to contain_exactly(compliance_violation, compliance_violation2)
+          end
+        end
+      end
+    end
+  end
+end

ee/spec/graphql/types/compliance_management/merge_requests/compliance_violation_reason_enum_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe GitlabSchema.types['ComplianceViolationReason'] do
+  let_it_be(:fields) do
+    ::Enums::MergeRequests::ComplianceViolation.reasons.keys.map { |r| r.to_s.upcase }
+  end
+
+  specify { expect(described_class.graphql_name).to eq('ComplianceViolationReason') }
+  specify { expect(described_class.values.keys).to match_array(fields) }
+end

ee/spec/graphql/types/compliance_management/merge_requests/compliance_violation_severity_enum_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe GitlabSchema.types['ComplianceViolationSeverity'] do
+  let_it_be(:fields) do
+    ::Enums::MergeRequests::ComplianceViolation.severity_levels.keys.map { |s| s.to_s.upcase }
+  end
+
+  specify { expect(described_class.graphql_name).to eq('ComplianceViolationSeverity') }
+  specify { expect(described_class.values.keys).to match_array(fields) }
+end

ee/spec/graphql/types/compliance_management/merge_requests/compliance_violation_type_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe GitlabSchema.types['ComplianceViolation'] do
+  let(:fields) do
+    %i[id severity_level reason violating_user merge_request]
+  end
+
+  specify { expect(described_class.graphql_name).to eq('ComplianceViolation') }
+  specify { expect(described_class).to have_graphql_fields(fields) }
+  specify { expect(described_class).to require_graphql_authorizations(:read_group_compliance_dashboard) }
+end

ee/spec/models/merge_requests/compliance_violation_spec.rb

@@ -3,7 +3,10 @@
 require 'spec_helper'
 
 RSpec.describe MergeRequests::ComplianceViolation, type: :model do
+  using RSpec::Parameterized::TableSyntax
+
   let_it_be(:merge_request) { create(:merge_request, state: :merged) }
+  let_it_be(:user) { create(:user) }
 
   describe "Associations" do
     it { is_expected.to belong_to(:violating_user) }
@@ -17,8 +20,6 @@ RSpec.describe MergeRequests::ComplianceViolation, type: :model do
     it { is_expected.to validate_presence_of(:severity_level) }
 
     context "when a violation exists with the same reason and user for a merge request" do
-      let_it_be(:user) { create(:user) }
-
       before do
         allow(merge_request).to receive(:committers).and_return([user])
         merge_request.approver_users << user
@@ -41,21 +42,61 @@ RSpec.describe MergeRequests::ComplianceViolation, type: :model do
     it { is_expected.to define_enum_for(:severity_level).with_values(::Enums::MergeRequests::ComplianceViolation.severity_levels) }
   end
 
-  describe '#approved_by_committer' do
+  describe '#by_approved_by_committer' do
     let_it_be(:violations) do
       [
-        create(:compliance_violation, :approved_by_committer, merge_request: merge_request, violating_user: create(:user)),
+        create(:compliance_violation, :approved_by_committer, merge_request: merge_request, violating_user: user),
         create(:compliance_violation, :approved_by_committer, merge_request: merge_request, violating_user: create(:user))
       ]
     end
 
     before do
       # Add a violation using a different reason to make sure it doesn't pick it up
-      create(:compliance_violation, :approved_by_insufficient_users, merge_request: merge_request, violating_user: create(:user))
+      create(:compliance_violation, :approved_by_insufficient_users, merge_request: merge_request, violating_user: user)
+    end
+
+    it 'returns the correct collection of violations' do
+      expect(merge_request.compliance_violations.by_approved_by_committer).to eq violations
+    end
+  end
+
+  describe '#by_group' do
+    let_it_be(:group) { create(:group) }
+    let_it_be(:subgroup) { create(:group, parent: group) }
+    let_it_be(:project) { create(:project, :repository, group: group) }
+    let_it_be(:subgroup_project) { create(:project, :repository, group: subgroup) }
+    let_it_be(:alt_merge_request) { create(:merge_request, source_project: project, target_project: project, state: :merged) }
+    let_it_be(:subgroup_merge_request) { create(:merge_request, source_project: subgroup_project, target_project: project, state: :merged) }
+    let_it_be(:violations) do
+      [
+        create(:compliance_violation, :approved_by_committer, merge_request: alt_merge_request, violating_user: user),
+        create(:compliance_violation, :approved_by_committer, merge_request: subgroup_merge_request, violating_user: user),
+        create(:compliance_violation, :approved_by_committer, merge_request: merge_request, violating_user: user)
+      ]
     end
 
     it 'returns the correct collection of violations' do
-      expect(merge_request.compliance_violations.approved_by_committer).to eq violations
+      expect(described_class.by_group(group)).to contain_exactly(violations[0], violations[1])
+    end
+  end
+
+  describe '#order_by_severity_level' do
+    let_it_be(:violations) do
+      [
+        create(:compliance_violation, :approved_by_committer, severity_level: :low, merge_request: merge_request, violating_user: create(:user)),
+        create(:compliance_violation, :approved_by_committer, severity_level: :high, merge_request: merge_request, violating_user: create(:user))
+      ]
+    end
+
+    where(:direction, :result) do
+      'ASC'  | lazy { [violations[0], violations[1]] }
+      'DESC' | lazy { [violations[1], violations[0]] }
+    end
+
+    with_them do
+      it 'returns the correct collection of violations' do
+        expect(described_class.order_by_severity_level(direction)).to match_array(result)
+      end
     end
   end
 

ee/spec/requests/api/graphql/compliance_management/merge_requests/compliance_violations_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'getting the compliance violations for a group' do
+  include GraphqlHelpers
+
+  let_it_be(:current_user) { create(:user) }
+  let_it_be(:group) { create(:group) }
+  let_it_be(:project) { create(:project, :repository, group: group) }
+  let_it_be(:project2) { create(:project, :repository, group: group) }
+  let_it_be(:project_outside_group) { create(:project, :repository, group: create(:group)) }
+  let_it_be(:merge_request) { create(:merge_request, source_project: project, target_project: project, state: :merged) }
+  let_it_be(:merge_request2) { create(:merge_request, source_project: project2, target_project: project2, state: :merged) }
+  let_it_be(:merge_request_outside_group) { create(:merge_request, source_project: project_outside_group, target_project: project_outside_group, state: :merged) }
+  let_it_be(:compliance_violation) { create(:compliance_violation, :approved_by_committer, severity_level: :low, merge_request: merge_request) }
+  let_it_be(:compliance_violation2) { create(:compliance_violation, :approved_by_merge_request_author, severity_level: :high, merge_request: merge_request2) }
+  let_it_be(:compliance_violation_outside_group) { create(:compliance_violation, :approved_by_committer, merge_request: merge_request_outside_group) }
+
+  let(:fields) do
+    <<~GRAPHQL
+        nodes {
+          id
+          severityLevel
+          reason
+          violatingUser {
+            id
+          }
+          mergeRequest {
+            id
+          }
+        }
+    GRAPHQL
+  end
+
+  def get_violation_values(violation)
+    {
+      'id' => violation.to_global_id.to_s,
+      'severityLevel' => ::Types::ComplianceManagement::MergeRequests::ComplianceViolationSeverityEnum.values[violation.severity_level.upcase].graphql_name,
+      'reason' => ::Types::ComplianceManagement::MergeRequests::ComplianceViolationReasonEnum.values[violation.reason.underscore.upcase].graphql_name,
+      'violatingUser' => {
+        'id' => violation.violating_user.to_global_id.to_s
+      },
+      'mergeRequest' => {
+        'id' => violation.merge_request.to_global_id.to_s
+      }
+    }
+  end
+
+  let(:violation_output) do
+    get_violation_values(compliance_violation)
+  end
+
+  let(:violation2_output) do
+    get_violation_values(compliance_violation2)
+  end
+
+  def query(params = {})
+    graphql_query_for(
+      :group, { full_path: group.full_path }, query_graphql_field("mergeRequestViolations", params, fields)
+    )
+  end
+
+  let(:compliance_violations) { graphql_data_at(:group, :merge_request_violations, :nodes) }
+
+  context 'when feature is disabled' do
+    before do
+      stub_feature_flags(compliance_violations_graphql_type: false)
+    end
+
+    it 'returns empty' do
+      post_graphql(query, current_user: current_user)
+
+      expect(compliance_violations).to be_empty
+    end
+  end
+
+  context 'when feature is enabled' do
+    before do
+      stub_feature_flags(compliance_violations_graphql_type: true)
+    end
+
+    context 'when the user is unauthorized' do
+      it 'returns empty' do
+        post_graphql(query, current_user: current_user)
+
+        expect(compliance_violations).to be_empty
+      end
+    end
+
+    context 'when the user is authorized' do
+      before do
+        group.add_owner(current_user)
+      end
+
+      context 'without any filters or sorting' do
+        it 'finds all the compliance violations' do
+          post_graphql(query, current_user: current_user)
+
+          expect(compliance_violations).to contain_exactly(violation_output, violation2_output)
+        end
+      end
+    end
+  end
+end

spec/requests/api/graphql/group_query_spec.rb

@@ -20,6 +20,8 @@ RSpec.describe 'getting group information' do
       fields = all_graphql_fields_for('Group')
       # TODO: Set required timelogs args elsewhere https://gitlab.com/gitlab-org/gitlab/-/issues/325499
       fields.selection['timelogs(startDate: "2021-03-01" endDate: "2021-03-30")'] = fields.selection.delete('timelogs')
+      # TODO: Remove when `compliance_violations_graphql_type` feature flag is removed in https://gitlab.com/gitlab-org/gitlab/-/issues/350249
+      fields.selection.delete('mergeRequestViolations')
 
       graphql_query_for(
         'group',