GraphQL for dependency proxy ttl policies

Add endpoints to query and update
dependency proxy image ttl group policies

Changelog: added

app/graphql/mutations/dependency_proxy/image_ttl_group_policy/update.rb

+# frozen_string_literal: true
+
+module Mutations
+  module DependencyProxy
+    module ImageTtlGroupPolicy
+      class Update < Mutations::BaseMutation
+        include Mutations::ResolvesGroup
+
+        graphql_name 'UpdateDependencyProxyImageTtlGroupPolicy'
+
+        authorize :admin_dependency_proxy
+
+        argument :group_path,
+                GraphQL::Types::ID,
+                required: true,
+                description: 'Group path for the group dependency proxy image TTL policy.'
+
+        argument :enabled,
+                GraphQL::Types::Boolean,
+                required: false,
+                description: copy_field_description(Types::DependencyProxy::ImageTtlGroupPolicyType, :enabled)
+
+        argument :ttl,
+                GraphQL::Types::Int,
+                required: false,
+                description: copy_field_description(Types::DependencyProxy::ImageTtlGroupPolicyType, :ttl)
+
+        field :dependency_proxy_image_ttl_policy,
+              Types::DependencyProxy::ImageTtlGroupPolicyType,
+              null: true,
+              description: 'Group image TTL policy after mutation.'
+
+        def resolve(group_path:, **args)
+          group = authorized_find!(group_path: group_path)
+
+          result = ::DependencyProxy::ImageTtlGroupPolicies::UpdateService
+            .new(container: group, current_user: current_user, params: args)
+            .execute
+
+          {
+            dependency_proxy_image_ttl_policy: result.payload[:dependency_proxy_image_ttl_policy],
+            errors: result.errors
+          }
+        end
+
+        private
+
+        def find_object(group_path:)
+          resolve_group(full_path: group_path)
+        end
+      end
+    end
+  end
+end

app/graphql/types/dependency_proxy/image_ttl_group_policy_type.rb

+# frozen_string_literal: true
+
+module Types
+  class DependencyProxy::ImageTtlGroupPolicyType < BaseObject
+    graphql_name 'DependencyProxyImageTtlGroupPolicy'
+
+    description 'Group-level Dependency Proxy TTL policy settings'
+
+    authorize :read_dependency_proxy
+
+    field :enabled, GraphQL::Types::Boolean, null: false, description: 'Indicates whether the policy is enabled or disabled.'
+    field :ttl, GraphQL::Types::Int, null: true, description: 'Number of days to retain a cached image file.'
+    field :created_at, Types::TimeType, null: true, description: 'Timestamp of creation.'
+    field :updated_at, Types::TimeType, null: true, description: 'Timestamp of the most recent update.'
+  end
+end

app/graphql/types/group_type.rb

@@ -163,6 +163,11 @@ module Types
           null: false,
           description: 'Prefix for pulling images when using the dependency proxy.'
 
+    field :dependency_proxy_image_ttl_policy,
+          Types::DependencyProxy::ImageTtlGroupPolicyType,
+          null: true,
+          description: 'Dependency proxy TTL policy for the group.'
+
     def label(title:)
       BatchLoader::GraphQL.for(title).batch(key: group) do |titles, loader, args|
         LabelsFinder

app/graphql/types/mutation_type.rb

@@ -34,6 +34,7 @@ module Types
     mount_mutation Mutations::Commits::Create, calls_gitaly: true
     mount_mutation Mutations::CustomEmoji::Create, feature_flag: :custom_emoji
     mount_mutation Mutations::Discussions::ToggleResolve
+    mount_mutation Mutations::DependencyProxy::ImageTtlGroupPolicy::Update
     mount_mutation Mutations::Environments::CanaryIngress::Update
     mount_mutation Mutations::Issues::Create
     mount_mutation Mutations::Issues::SetAssignees

app/models/group.rb

@@ -764,6 +764,10 @@ class Group < Namespace
     ::CustomerRelations::Contact.where(group_id: self.id)
   end
 
+  def dependency_proxy_image_ttl_policy
+    super || build_dependency_proxy_image_ttl_policy
+  end
+
   private
 
   def max_member_access(user_ids)

app/policies/dependency_proxy/image_ttl_group_policy_policy.rb

+# frozen_string_literal: true
+module DependencyProxy
+  class ImageTtlGroupPolicyPolicy < BasePolicy
+    delegate { @subject.group }
+  end
+end

app/policies/group_policy.rb

@@ -228,8 +228,9 @@ class GroupPolicy < BasePolicy
   rule { dependency_proxy_access_allowed & dependency_proxy_available }
     .enable :read_dependency_proxy
 
-  rule { developer & dependency_proxy_available }
-    .enable :admin_dependency_proxy
+  rule { developer & dependency_proxy_available }.policy do
+    enable :admin_dependency_proxy
+  end
 
   rule { can?(:admin_group) & resource_access_token_feature_available }.policy do
     enable :read_resource_access_tokens

app/services/dependency_proxy/image_ttl_group_policies/update_service.rb

+# frozen_string_literal: true
+
+module DependencyProxy
+  module ImageTtlGroupPolicies
+    class UpdateService < BaseContainerService
+      include Gitlab::Utils::StrongMemoize
+
+      ALLOWED_ATTRIBUTES = %i[enabled ttl].freeze
+
+      def execute
+        return ServiceResponse.error(message: 'Access Denied', http_status: 403) unless allowed?
+        return ServiceResponse.error(message: 'Dependency proxy image TTL Policy not found', http_status: 404) unless dependency_proxy_image_ttl_policy
+
+        if dependency_proxy_image_ttl_policy.update(dependency_proxy_image_ttl_policy_params)
+          ServiceResponse.success(payload: { dependency_proxy_image_ttl_policy: dependency_proxy_image_ttl_policy })
+        else
+          ServiceResponse.error(
+            message: dependency_proxy_image_ttl_policy.errors.full_messages.to_sentence || 'Bad request',
+            http_status: 400
+          )
+        end
+      end
+
+      private
+
+      def dependency_proxy_image_ttl_policy
+        strong_memoize(:dependency_proxy_image_ttl_policy) do
+          container.dependency_proxy_image_ttl_policy
+        end
+      end
+
+      def allowed?
+        Ability.allowed?(current_user, :admin_dependency_proxy, container)
+      end
+
+      def dependency_proxy_image_ttl_policy_params
+        params.slice(*ALLOWED_ATTRIBUTES)
+      end
+    end
+  end
+end

doc/api/graphql/reference/index.md

@@ -4180,6 +4180,27 @@ Input type: `UpdateContainerExpirationPolicyInput`
 | <a id="mutationupdatecontainerexpirationpolicycontainerexpirationpolicy"></a>`containerExpirationPolicy` | [`ContainerExpirationPolicy`](#containerexpirationpolicy) | Container expiration policy after mutation. |
 | <a id="mutationupdatecontainerexpirationpolicyerrors"></a>`errors` | [`[String!]!`](#string) | Errors encountered during execution of the mutation. |
 
+### `Mutation.updateDependencyProxyImageTtlGroupPolicy`
+
+Input type: `UpdateDependencyProxyImageTtlGroupPolicyInput`
+
+#### Arguments
+
+| Name | Type | Description |
+| ---- | ---- | ----------- |
+| <a id="mutationupdatedependencyproxyimagettlgrouppolicyclientmutationid"></a>`clientMutationId` | [`String`](#string) | A unique identifier for the client performing the mutation. |
+| <a id="mutationupdatedependencyproxyimagettlgrouppolicyenabled"></a>`enabled` | [`Boolean`](#boolean) | Indicates whether the policy is enabled or disabled. |
+| <a id="mutationupdatedependencyproxyimagettlgrouppolicygrouppath"></a>`groupPath` | [`ID!`](#id) | Group path for the group dependency proxy image TTL policy. |
+| <a id="mutationupdatedependencyproxyimagettlgrouppolicyttl"></a>`ttl` | [`Int`](#int) | Number of days to retain a cached image file. |
+
+#### Fields
+
+| Name | Type | Description |
+| ---- | ---- | ----------- |
+| <a id="mutationupdatedependencyproxyimagettlgrouppolicyclientmutationid"></a>`clientMutationId` | [`String`](#string) | A unique identifier for the client performing the mutation. |
+| <a id="mutationupdatedependencyproxyimagettlgrouppolicydependencyproxyimagettlpolicy"></a>`dependencyProxyImageTtlPolicy` | [`DependencyProxyImageTtlGroupPolicy`](#dependencyproxyimagettlgrouppolicy) | Group image TTL policy after mutation. |
+| <a id="mutationupdatedependencyproxyimagettlgrouppolicyerrors"></a>`errors` | [`[String!]!`](#string) | Errors encountered during execution of the mutation. |
+
 ### `Mutation.updateEpic`
 
 Input type: `UpdateEpicInput`
@@ -8752,6 +8773,19 @@ Dependency proxy blob.
 | <a id="dependencyproxyblobsize"></a>`size` | [`String!`](#string) | Size of the blob file. |
 | <a id="dependencyproxyblobupdatedat"></a>`updatedAt` | [`Time!`](#time) | Date of most recent update. |
 
+### `DependencyProxyImageTtlGroupPolicy`
+
+Group-level Dependency Proxy TTL policy settings.
+
+#### Fields
+
+| Name | Type | Description |
+| ---- | ---- | ----------- |
+| <a id="dependencyproxyimagettlgrouppolicycreatedat"></a>`createdAt` | [`Time`](#time) | Timestamp of creation. |
+| <a id="dependencyproxyimagettlgrouppolicyenabled"></a>`enabled` | [`Boolean!`](#boolean) | Indicates whether the policy is enabled or disabled. |
+| <a id="dependencyproxyimagettlgrouppolicyttl"></a>`ttl` | [`Int`](#int) | Number of days to retain a cached image file. |
+| <a id="dependencyproxyimagettlgrouppolicyupdatedat"></a>`updatedAt` | [`Time`](#time) | Timestamp of the most recent update. |
+
 ### `DependencyProxyManifest`
 
 Dependency proxy manifest.
@@ -9830,6 +9864,7 @@ four standard [pagination arguments](#connection-pagination-arguments):
 | <a id="groupdependencyproxyblobs"></a>`dependencyProxyBlobs` | [`DependencyProxyBlobConnection`](#dependencyproxyblobconnection) | Dependency Proxy blobs. (see [Connections](#connections)) |
 | <a id="groupdependencyproxyimagecount"></a>`dependencyProxyImageCount` | [`Int!`](#int) | Number of dependency proxy images cached in the group. |
 | <a id="groupdependencyproxyimageprefix"></a>`dependencyProxyImagePrefix` | [`String!`](#string) | Prefix for pulling images when using the dependency proxy. |
+| <a id="groupdependencyproxyimagettlpolicy"></a>`dependencyProxyImageTtlPolicy` | [`DependencyProxyImageTtlGroupPolicy`](#dependencyproxyimagettlgrouppolicy) | Dependency proxy TTL policy for the group. |
 | <a id="groupdependencyproxymanifests"></a>`dependencyProxyManifests` | [`DependencyProxyManifestConnection`](#dependencyproxymanifestconnection) | Dependency Proxy manifests. (see [Connections](#connections)) |
 | <a id="groupdependencyproxysetting"></a>`dependencyProxySetting` | [`DependencyProxySetting`](#dependencyproxysetting) | Dependency Proxy settings for the group. |
 | <a id="groupdependencyproxytotalsize"></a>`dependencyProxyTotalSize` | [`String!`](#string) | Total size of the dependency proxy cached images. |

spec/factories/dependency_proxy/image_ttl_group_policies.rb

+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory :image_ttl_group_policy, class: 'DependencyProxy::ImageTtlGroupPolicy' do
+    group
+
+    enabled { true }
+    ttl { 90 }
+  end
+end

spec/graphql/mutations/dependency_proxy/image_ttl_group_policy/update_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Mutations::DependencyProxy::ImageTtlGroupPolicy::Update do
+  using RSpec::Parameterized::TableSyntax
+
+  let_it_be_with_reload(:group) { create(:group) }
+  let_it_be(:user) { create(:user) }
+
+  let(:params) { { group_path: group.full_path } }
+
+  specify { expect(described_class).to require_graphql_authorizations(:admin_dependency_proxy) }
+
+  describe '#resolve' do
+    subject { described_class.new(object: group, context: { current_user: user }, field: nil).resolve(**params) }
+
+    shared_examples 'returning a success' do
+      it 'returns the dependency proxy image ttl group policy with no errors' do
+        expect(subject).to eq(
+          dependency_proxy_image_ttl_policy: ttl_policy,
+          errors: []
+        )
+      end
+    end
+
+    shared_examples 'updating the dependency proxy image ttl policy' do
+      it_behaves_like 'updating the dependency proxy image ttl policy attributes',
+        from: { enabled: true, ttl: 90 },
+        to: { enabled: false, ttl: 2 }
+
+      it_behaves_like 'returning a success'
+
+      context 'with invalid params' do
+        let_it_be(:params) { { group_path: group.full_path, enabled: nil } }
+
+        it "doesn't create the dependency proxy image ttl policy" do
+          expect { subject }.not_to change { DependencyProxy::ImageTtlGroupPolicy.count }
+        end
+
+        it 'does not update' do
+          expect { subject }
+            .not_to change { ttl_policy.reload.enabled }
+        end
+
+        it 'returns an error' do
+          expect(subject).to eq(
+            dependency_proxy_image_ttl_policy: nil,
+            errors: ['Enabled is not included in the list']
+          )
+        end
+      end
+    end
+
+    shared_examples 'denying access to dependency proxy image ttl policy' do
+      it 'raises Gitlab::Graphql::Errors::ResourceNotAvailable' do
+        expect { subject }.to raise_error(Gitlab::Graphql::Errors::ResourceNotAvailable)
+      end
+    end
+
+    before do
+      stub_config(dependency_proxy: { enabled: true })
+    end
+
+    context 'with existing dependency proxy image ttl policy' do
+      let_it_be(:ttl_policy) { create(:image_ttl_group_policy, group: group) }
+      let_it_be(:params) do
+        { group_path: group.full_path,
+          enabled: false,
+          ttl: 2 }
+      end
+
+      where(:user_role, :shared_examples_name) do
+        :maintainer | 'updating the dependency proxy image ttl policy'
+        :developer  | 'updating the dependency proxy image ttl policy'
+        :reporter   | 'denying access to dependency proxy image ttl policy'
+        :guest      | 'denying access to dependency proxy image ttl policy'
+        :anonymous  | 'denying access to dependency proxy image ttl policy'
+      end
+
+      with_them do
+        before do
+          group.send("add_#{user_role}", user) unless user_role == :anonymous
+        end
+
+        it_behaves_like params[:shared_examples_name]
+      end
+    end
+
+    context 'without existing dependency proxy image ttl policy' do
+      let_it_be(:ttl_policy) { group.dependency_proxy_image_ttl_policy }
+
+      where(:user_role, :shared_examples_name) do
+        :maintainer | 'creating the dependency proxy image ttl policy'
+        :developer  | 'creating the dependency proxy image ttl policy'
+        :reporter   | 'denying access to dependency proxy image ttl policy'
+        :guest      | 'denying access to dependency proxy image ttl policy'
+        :anonymous  | 'denying access to dependency proxy image ttl policy'
+      end
+
+      with_them do
+        before do
+          group.send("add_#{user_role}", user) unless user_role == :anonymous
+        end
+
+        it_behaves_like params[:shared_examples_name]
+      end
+    end
+  end
+end

spec/graphql/types/dependency_proxy/image_ttl_group_policy_type_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe GitlabSchema.types['DependencyProxyImageTtlGroupPolicy'] do
+  it { expect(described_class.graphql_name).to eq('DependencyProxyImageTtlGroupPolicy') }
+
+  it { expect(described_class.description).to eq('Group-level Dependency Proxy TTL policy settings') }
+
+  it { expect(described_class).to require_graphql_authorizations(:read_dependency_proxy) }
+
+  it 'includes dependency proxy image ttl policy fields' do
+    expected_fields = %w[enabled ttl created_at updated_at]
+
+    expect(described_class).to have_graphql_fields(*expected_fields).only
+  end
+end

spec/graphql/types/group_type_spec.rb

@@ -21,8 +21,8 @@ RSpec.describe GitlabSchema.types['Group'] do
       packages dependency_proxy_setting dependency_proxy_manifests
       dependency_proxy_blobs dependency_proxy_image_count
       dependency_proxy_blob_count dependency_proxy_total_size
-      dependency_proxy_image_prefix shared_runners_setting
-      timelogs organizations contacts
+      dependency_proxy_image_prefix dependency_proxy_image_ttl_policy
+      shared_runners_setting timelogs organizations contacts
     ]
 
     expect(described_class).to include_graphql_fields(*expected_fields)

spec/models/group_spec.rb

@@ -2743,4 +2743,28 @@ RSpec.describe Group do
       expect(group.dependency_proxy_image_prefix).not_to include('http')
     end
   end
+
+  describe '#dependency_proxy_image_ttl_policy' do
+    subject(:ttl_policy) { group.dependency_proxy_image_ttl_policy }
+
+    it 'builds a new policy if one does not exist', :aggregate_failures do
+      expect(ttl_policy.ttl).to eq(90)
+      expect(ttl_policy.enabled).to eq(false)
+      expect(ttl_policy.created_at).to be_nil
+      expect(ttl_policy.updated_at).to be_nil
+    end
+
+    context 'with existing policy' do
+      before do
+        group.dependency_proxy_image_ttl_policy.update!(ttl: 30, enabled: true)
+      end
+
+      it 'returns the policy if it already exists', :aggregate_failures do
+        expect(ttl_policy.ttl).to eq(30)
+        expect(ttl_policy.enabled).to eq(true)
+        expect(ttl_policy.created_at).not_to be_nil
+        expect(ttl_policy.updated_at).not_to be_nil
+      end
+    end
+  end
 end

spec/policies/group_policy_spec.rb

@@ -893,6 +893,34 @@ RSpec.describe GroupPolicy do
     end
   end
 
+  describe 'dependency proxy' do
+    context 'feature disabled' do
+      let(:current_user) { owner }
+
+      it { is_expected.to be_disallowed(:read_dependency_proxy) }
+      it { is_expected.to be_disallowed(:admin_dependency_proxy) }
+    end
+
+    context 'feature enabled' do
+      before do
+        stub_config(dependency_proxy: { enabled: true })
+        group.create_dependency_proxy_setting!(enabled: true)
+      end
+
+      context 'reporter' do
+        let(:current_user) { reporter }
+
+        it { is_expected.to be_disallowed(:admin_dependency_proxy) }
+      end
+
+      context 'developer' do
+        let(:current_user) { developer }
+
+        it { is_expected.to be_allowed(:admin_dependency_proxy) }
+      end
+    end
+  end
+
   context 'deploy token access' do
     let!(:group_deploy_token) do
       create(:group_deploy_token, group: group, deploy_token: deploy_token)
@@ -920,6 +948,18 @@ RSpec.describe GroupPolicy do
       it { is_expected.to be_allowed(:read_contact) }
       it { is_expected.to be_disallowed(:destroy_package) }
     end
+
+    context 'a deploy token with dependency proxy scopes' do
+      let_it_be(:deploy_token) { create(:deploy_token, :group, :dependency_proxy_scopes) }
+
+      before do
+        stub_config(dependency_proxy: { enabled: true })
+        group.create_dependency_proxy_setting!(enabled: true)
+      end
+
+      it { is_expected.to be_allowed(:read_dependency_proxy) }
+      it { is_expected.to be_disallowed(:admin_dependency_proxy) }
+    end
   end
 
   it_behaves_like 'Self-managed Core resource access tokens'

spec/requests/api/graphql/group/dependency_proxy_image_ttl_policy_spec.rb

+# frozen_string_literal: true
+require 'spec_helper'
+
+RSpec.describe 'getting dependency proxy image ttl policy for a group' do
+  using RSpec::Parameterized::TableSyntax
+  include GraphqlHelpers
+
+  let_it_be(:user) { create(:user) }
+  let_it_be_with_reload(:group) { create(:group) }
+
+  let(:dependency_proxy_image_ttl_policy_fields) do
+    <<~GQL
+      #{all_graphql_fields_for('dependency_proxy_image_ttl_group_policy'.classify, max_depth: 1)}
+    GQL
+  end
+
+  let(:fields) do
+    <<~GQL
+      #{query_graphql_field('dependency_proxy_image_ttl_policy', {}, dependency_proxy_image_ttl_policy_fields)}
+    GQL
+  end
+
+  let(:query) do
+    graphql_query_for(
+      'group',
+      { 'fullPath' => group.full_path },
+      fields
+    )
+  end
+
+  let(:variables) { {} }
+  let(:dependency_proxy_image_ttl_policy_response) { graphql_data.dig('group', 'dependencyProxyImageTtlPolicy') }
+
+  before do
+    stub_config(dependency_proxy: { enabled: true })
+  end
+
+  subject { post_graphql(query, current_user: user, variables: variables) }
+
+  it_behaves_like 'a working graphql query' do
+    before do
+      subject
+    end
+  end
+
+  context 'with different permissions' do
+    where(:group_visibility, :role, :access_granted) do
+      :private | :maintainer | true
+      :private | :developer  | true
+      :private | :reporter   | true
+      :private | :guest      | true
+      :private | :anonymous  | false
+      :public  | :maintainer | true
+      :public  | :developer  | true
+      :public  | :reporter   | true
+      :public  | :guest      | true
+      :public  | :anonymous  | false
+    end
+
+    with_them do
+      before do
+        group.update_column(:visibility_level, Gitlab::VisibilityLevel.const_get(group_visibility.to_s.upcase, false))
+        group.add_user(user, role) unless role == :anonymous
+      end
+
+      it 'return the proper response' do
+        subject
+
+        if access_granted
+          expect(dependency_proxy_image_ttl_policy_response).to eq("createdAt" => nil, "enabled" => false, "ttl" => 90, "updatedAt" => nil)
+        else
+          expect(dependency_proxy_image_ttl_policy_response).to be_blank
+        end
+      end
+    end
+  end
+end

spec/requests/api/graphql/mutations/dependency_proxy/image_ttl_group_policy/update_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'Updating the dependency proxy image ttl policy' do
+  include GraphqlHelpers
+  using RSpec::Parameterized::TableSyntax
+
+  let_it_be(:user) { create(:user) }
+
+  let(:params) do
+    {
+      group_path: group.full_path,
+      enabled: false,
+      ttl: 2
+    }
+  end
+
+  let(:mutation) do
+    graphql_mutation(:update_dependency_proxy_image_ttl_group_policy, params) do
+      <<~QL
+        dependencyProxyImageTtlPolicy {
+          enabled
+          ttl
+        }
+        errors
+      QL
+    end
+  end
+
+  let(:mutation_response) { graphql_mutation_response(:update_dependency_proxy_image_ttl_group_policy) }
+  let(:ttl_policy_response) { mutation_response['dependencyProxyImageTtlPolicy'] }
+
+  before do
+    stub_config(dependency_proxy: { enabled: true })
+  end
+
+  describe 'post graphql mutation' do
+    subject { post_graphql_mutation(mutation, current_user: user) }
+
+    let_it_be(:ttl_policy, reload: true) { create(:image_ttl_group_policy) }
+    let_it_be(:group, reload: true) { ttl_policy.group }
+
+    context 'without permission' do
+      it 'returns no response' do
+        subject
+
+        expect(response).to have_gitlab_http_status(:success)
+        expect(mutation_response).to be_nil
+      end
+    end
+
+    context 'with permission' do
+      before do
+        group.add_developer(user)
+      end
+
+      it 'returns the updated dependency proxy image ttl policy', :aggregate_failures do
+        subject
+
+        expect(response).to have_gitlab_http_status(:success)
+        expect(mutation_response['errors']).to be_empty
+        expect(ttl_policy_response).to include(
+          'enabled' => params[:enabled],
+          'ttl' => params[:ttl]
+        )
+      end
+    end
+  end
+end

spec/services/dependency_proxy/image_ttl_group_policies/update_service_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe ::DependencyProxy::ImageTtlGroupPolicies::UpdateService do
+  using RSpec::Parameterized::TableSyntax
+
+  let_it_be_with_reload(:group) { create(:group) }
+  let_it_be(:user) { create(:user) }
+  let_it_be(:params) { {} }
+
+  describe '#execute' do
+    subject { described_class.new(container: group, current_user: user, params: params).execute }
+
+    shared_examples 'returning a success' do
+      it 'returns a success' do
+        result = subject
+
+        expect(result.payload[:dependency_proxy_image_ttl_policy]).to be_present
+        expect(result).to be_success
+      end
+    end
+
+    shared_examples 'returning an error' do |message, http_status|
+      it 'returns an error' do
+        result = subject
+
+        expect(result).to have_attributes(
+          message: message,
+          status: :error,
+          http_status: http_status
+        )
+      end
+    end
+
+    shared_examples 'updating the dependency proxy image ttl policy' do
+      it_behaves_like 'updating the dependency proxy image ttl policy attributes',
+        from: { enabled: true, ttl: 90 },
+        to: { enabled: false, ttl: 2 }
+
+      it_behaves_like 'returning a success'
+
+      context 'with invalid params' do
+        let_it_be(:params) { { enabled: nil } }
+
+        it_behaves_like 'not creating the dependency proxy image ttl policy'
+
+        it "doesn't update" do
+          expect { subject }
+            .not_to change { ttl_policy.reload.enabled }
+        end
+
+        it_behaves_like 'returning an error', 'Enabled is not included in the list', 400
+      end
+    end
+
+    shared_examples 'denying access to dependency proxy image ttl policy' do
+      context 'with existing dependency proxy image ttl policy' do
+        it_behaves_like 'not creating the dependency proxy image ttl policy'
+
+        it_behaves_like 'returning an error', 'Access Denied', 403
+      end
+    end
+
+    before do
+      stub_config(dependency_proxy: { enabled: true })
+    end
+
+    context 'with existing dependency proxy image ttl policy' do
+      let_it_be(:ttl_policy) { create(:image_ttl_group_policy, group: group) }
+      let_it_be(:params) { { enabled: false, ttl: 2 } }
+
+      where(:user_role, :shared_examples_name) do
+        :maintainer | 'updating the dependency proxy image ttl policy'
+        :developer  | 'updating the dependency proxy image ttl policy'
+        :reporter   | 'denying access to dependency proxy image ttl policy'
+        :guest      | 'denying access to dependency proxy image ttl policy'
+        :anonymous  | 'denying access to dependency proxy image ttl policy'
+      end
+
+      with_them do
+        before do
+          group.send("add_#{user_role}", user) unless user_role == :anonymous
+        end
+
+        it_behaves_like params[:shared_examples_name]
+      end
+    end
+
+    context 'without existing dependency proxy image ttl policy' do
+      let_it_be(:ttl_policy) { group.dependency_proxy_image_ttl_policy }
+
+      where(:user_role, :shared_examples_name) do
+        :maintainer | 'creating the dependency proxy image ttl policy'
+        :developer  | 'creating the dependency proxy image ttl policy'
+        :reporter   | 'denying access to dependency proxy image ttl policy'
+        :guest      | 'denying access to dependency proxy image ttl policy'
+        :anonymous  | 'denying access to dependency proxy image ttl policy'
+      end
+
+      with_them do
+        before do
+          group.send("add_#{user_role}", user) unless user_role == :anonymous
+        end
+
+        it_behaves_like params[:shared_examples_name]
+      end
+
+      context 'when the policy is not found' do
+        before do
+          group.add_developer(user)
+          expect(group).to receive(:dependency_proxy_image_ttl_policy).and_return nil
+        end
+
+        it_behaves_like 'returning an error', 'Dependency proxy image TTL Policy not found', 404
+      end
+    end
+  end
+end

spec/support/shared_examples/services/dependency_proxy_ttl_policies_shared_examples.rb

+# frozen_string_literal: true
+
+RSpec.shared_examples 'updating the dependency proxy image ttl policy attributes' do |from: {}, to:|
+  it_behaves_like 'not creating the dependency proxy image ttl policy'
+
+  it 'updates the dependency proxy image ttl policy' do
+    expect { subject }
+      .to change { group.dependency_proxy_image_ttl_policy.reload.enabled }.from(from[:enabled]).to(to[:enabled])
+      .and change { group.dependency_proxy_image_ttl_policy.reload.ttl }.from(from[:ttl]).to(to[:ttl])
+  end
+end
+
+RSpec.shared_examples 'not creating the dependency proxy image ttl policy' do
+  it "doesn't create the dependency proxy image ttl policy" do
+    expect { subject }.not_to change { DependencyProxy::ImageTtlGroupPolicy.count }
+  end
+end
+
+RSpec.shared_examples 'creating the dependency proxy image ttl policy' do
+  it 'creates a new package setting' do
+    expect { subject }.to change { DependencyProxy::ImageTtlGroupPolicy.count }.by(1)
+  end
+
+  it 'saves the settings' do
+    subject
+
+    expect(group.dependency_proxy_image_ttl_policy).to have_attributes(
+      enabled: ttl_policy[:enabled],
+      ttl: ttl_policy[:ttl]
+    )
+  end
+
+  it_behaves_like 'returning a success'
+end