Populate combobox with group milestones

Fetchs data from group milestones API
Searches with the group search API
Adds group milestone results section
Check if group_milestones_project_releases is available

app/assets/javascripts/milestones/components/milestone_combobox.vue

@@ -39,6 +39,16 @@ export default {
       type: String,
       required: true,
     },
+    groupId: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    groupMilestonesAvailable: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
     extraLinks: {
       type: Array,
       default: () => [],
@@ -56,12 +66,13 @@ export default {
     noMilestone: s__('MilestoneCombobox|No milestone'),
     noResultsLabel: s__('MilestoneCombobox|No matching results'),
     searchMilestones: s__('MilestoneCombobox|Search Milestones'),
-    searhErrorMessage: s__('MilestoneCombobox|An error occurred while searching for milestones'),
+    searchErrorMessage: s__('MilestoneCombobox|An error occurred while searching for milestones'),
     projectMilestones: s__('MilestoneCombobox|Project milestones'),
+    groupMilestones: s__('MilestoneCombobox|Group milestones'),
   },
   computed: {
     ...mapState(['matches', 'selectedMilestones']),
-    ...mapGetters(['isLoading']),
+    ...mapGetters(['isLoading', 'groupMilestonesEnabled']),
     selectedMilestonesLabel() {
       const { selectedMilestones } = this;
       const firstMilestoneName = selectedMilestones[0];
@@ -85,8 +96,14 @@ export default {
         this.matches.projectMilestones.totalCount > 0 || this.matches.projectMilestones.error,
       );
     },
+    showGroupMilestoneSection() {
+      return (
+        this.groupMilestonesEnabled &&
+        Boolean(this.matches.groupMilestones.totalCount > 0 || this.matches.groupMilestones.error)
+      );
+    },
     showNoResults() {
-      return !this.showProjectMilestoneSection;
+      return !this.showProjectMilestoneSection && !this.showGroupMilestoneSection;
     },
   },
   watch: {
@@ -115,11 +132,15 @@ export default {
     }, SEARCH_DEBOUNCE_MS);
 
     this.setProjectId(this.projectId);
+    this.setGroupId(this.groupId);
+    this.setGroupMilestonesAvailable(this.groupMilestonesAvailable);
     this.fetchMilestones();
   },
   methods: {
     ...mapActions([
       'setProjectId',
+      'setGroupId',
+      'setGroupMilestonesAvailable',
       'setSelectedMilestones',
       'clearSelectedMilestones',
       'toggleMilestones',
@@ -194,15 +215,28 @@ export default {
     </template>
     <template v-else>
       <milestone-results-section
+        v-if="showProjectMilestoneSection"
         :section-title="$options.translations.projectMilestones"
         :total-count="matches.projectMilestones.totalCount"
         :items="matches.projectMilestones.list"
         :selected-milestones="selectedMilestones"
         :error="matches.projectMilestones.error"
-        :error-message="$options.translations.searhErrorMessage"
+        :error-message="$options.translations.searchErrorMessage"
         data-testid="project-milestones-section"
         @selected="selectMilestone($event)"
       />
+
+      <milestone-results-section
+        v-if="showGroupMilestoneSection"
+        :section-title="$options.translations.groupMilestones"
+        :total-count="matches.groupMilestones.totalCount"
+        :items="matches.groupMilestones.list"
+        :selected-milestones="selectedMilestones"
+        :error="matches.groupMilestones.error"
+        :error-message="$options.translations.searchErrorMessage"
+        data-testid="group-milestones-section"
+        @selected="selectMilestone($event)"
+      />
     </template>
     <gl-dropdown-item
       v-for="(item, idx) in extraLinks"

app/assets/javascripts/milestones/stores/actions.js

@@ -2,6 +2,9 @@ import Api from '~/api';
 import * as types from './mutation_types';
 
 export const setProjectId = ({ commit }, projectId) => commit(types.SET_PROJECT_ID, projectId);
+export const setGroupId = ({ commit }, groupId) => commit(types.SET_GROUP_ID, groupId);
+export const setGroupMilestonesAvailable = ({ commit }, groupMilestonesAvailable) =>
+  commit(types.SET_GROUP_MILESTONES_AVAILABLE, groupMilestonesAvailable);
 
 export const setSelectedMilestones = ({ commit }, selectedMilestones) =>
   commit(types.SET_SELECTED_MILESTONES, selectedMilestones);
@@ -18,13 +21,23 @@ export const toggleMilestones = ({ commit, state }, selectedMilestone) => {
   }
 };
 
-export const search = ({ dispatch, commit }, searchQuery) => {
+export const search = ({ dispatch, commit, getters }, searchQuery) => {
   commit(types.SET_SEARCH_QUERY, searchQuery);
 
-  dispatch('searchMilestones');
+  dispatch('searchProjectMilestones');
+  if (getters.groupMilestonesEnabled) {
+    dispatch('searchGroupMilestones');
+  }
+};
+
+export const fetchMilestones = ({ dispatch, getters }) => {
+  dispatch('fetchProjectMilestones');
+  if (getters.groupMilestonesEnabled) {
+    dispatch('fetchGroupMilestones');
+  }
 };
 
-export const fetchMilestones = ({ commit, state }) => {
+export const fetchProjectMilestones = ({ commit, state }) => {
   commit(types.REQUEST_START);
 
   Api.projectMilestones(state.projectId)
@@ -39,14 +52,29 @@ export const fetchMilestones = ({ commit, state }) => {
     });
 };
 
-export const searchMilestones = ({ commit, state }) => {
+export const fetchGroupMilestones = ({ commit, state }) => {
   commit(types.REQUEST_START);
 
+  Api.groupMilestones(state.groupId)
+    .then(response => {
+      commit(types.RECEIVE_GROUP_MILESTONES_SUCCESS, response);
+    })
+    .catch(error => {
+      commit(types.RECEIVE_GROUP_MILESTONES_ERROR, error);
+    })
+    .finally(() => {
+      commit(types.REQUEST_FINISH);
+    });
+};
+
+export const searchProjectMilestones = ({ commit, state }) => {
   const options = {
     search: state.searchQuery,
     scope: 'milestones',
   };
 
+  commit(types.REQUEST_START);
+
   Api.projectSearch(state.projectId, options)
     .then(response => {
       commit(types.RECEIVE_PROJECT_MILESTONES_SUCCESS, response);
@@ -58,3 +86,22 @@ export const searchMilestones = ({ commit, state }) => {
       commit(types.REQUEST_FINISH);
     });
 };
+
+export const searchGroupMilestones = ({ commit, state }) => {
+  const options = {
+    search: state.searchQuery,
+  };
+
+  commit(types.REQUEST_START);
+
+  Api.groupMilestones(state.groupId, options)
+    .then(response => {
+      commit(types.RECEIVE_GROUP_MILESTONES_SUCCESS, response);
+    })
+    .catch(error => {
+      commit(types.RECEIVE_GROUP_MILESTONES_ERROR, error);
+    })
+    .finally(() => {
+      commit(types.REQUEST_FINISH);
+    });
+};

app/assets/javascripts/milestones/stores/getters.js

 /** Returns `true` if there is at least one in-progress request */
 export const isLoading = ({ requestCount }) => requestCount > 0;
+
+/** Returns `true` if there is a group ID and group milestones are available */
+export const groupMilestonesEnabled = ({ groupId, groupMilestonesAvailable }) =>
+  Boolean(groupId && groupMilestonesAvailable);

app/assets/javascripts/milestones/stores/mutation_types.js

 export const SET_PROJECT_ID = 'SET_PROJECT_ID';
+export const SET_GROUP_ID = 'SET_GROUP_ID';
+export const SET_GROUP_MILESTONES_AVAILABLE = 'SET_GROUP_MILESTONES_AVAILABLE';
 
 export const SET_SELECTED_MILESTONES = 'SET_SELECTED_MILESTONES';
 export const CLEAR_SELECTED_MILESTONES = 'CLEAR_SELECTED_MILESTONES';
@@ -12,3 +14,6 @@ export const REQUEST_FINISH = 'REQUEST_FINISH';
 
 export const RECEIVE_PROJECT_MILESTONES_SUCCESS = 'RECEIVE_PROJECT_MILESTONES_SUCCESS';
 export const RECEIVE_PROJECT_MILESTONES_ERROR = 'RECEIVE_PROJECT_MILESTONES_ERROR';
+
+export const RECEIVE_GROUP_MILESTONES_SUCCESS = 'RECEIVE_GROUP_MILESTONES_SUCCESS';
+export const RECEIVE_GROUP_MILESTONES_ERROR = 'RECEIVE_GROUP_MILESTONES_ERROR';

app/assets/javascripts/milestones/stores/mutations.js

 import Vue from 'vue';
 import * as types from './mutation_types';
-import { convertObjectPropsToCamelCase } from '~/lib/utils/common_utils';
 
 export default {
   [types.SET_PROJECT_ID](state, projectId) {
     state.projectId = projectId;
   },
+  [types.SET_GROUP_ID](state, groupId) {
+    state.groupId = groupId;
+  },
+  [types.SET_GROUP_MILESTONES_AVAILABLE](state, groupMilestonesAvailable) {
+    state.groupMilestonesAvailable = groupMilestonesAvailable;
+  },
   [types.SET_SELECTED_MILESTONES](state, selectedMilestones) {
     Vue.set(state, 'selectedMilestones', selectedMilestones);
   },
@@ -32,7 +37,7 @@ export default {
   },
   [types.RECEIVE_PROJECT_MILESTONES_SUCCESS](state, response) {
     state.matches.projectMilestones = {
-      list: convertObjectPropsToCamelCase(response.data).map(({ title }) => ({ title })),
+      list: response.data.map(({ title }) => ({ title })),
       totalCount: parseInt(response.headers['x-total'], 10),
       error: null,
     };
@@ -44,4 +49,18 @@ export default {
       error,
     };
   },
+  [types.RECEIVE_GROUP_MILESTONES_SUCCESS](state, response) {
+    state.matches.groupMilestones = {
+      list: response.data.map(({ title }) => ({ title })),
+      totalCount: parseInt(response.headers['x-total'], 10),
+      error: null,
+    };
+  },
+  [types.RECEIVE_GROUP_MILESTONES_ERROR](state, error) {
+    state.matches.groupMilestones = {
+      list: [],
+      totalCount: 0,
+      error,
+    };
+  },
 };

app/assets/javascripts/milestones/stores/state.js

 export default () => ({
   projectId: null,
   groupId: null,
+  groupMilestonesAvailable: false,
   searchQuery: '',
   matches: {
     projectMilestones: {
@@ -8,6 +9,11 @@ export default () => ({
       totalCount: 0,
       error: null,
     },
+    groupMilestones: {
+      list: [],
+      totalCount: 0,
+      error: null,
+    },
   },
   selectedMilestones: [],
   requestCount: 0,

app/assets/javascripts/releases/components/app_edit_new.vue

@@ -34,6 +34,8 @@ export default {
       'newMilestonePath',
       'manageMilestonesPath',
       'projectId',
+      'groupId',
+      'groupMilestonesAvailable',
     ]),
     ...mapGetters('detail', ['isValid', 'isExistingRelease']),
     showForm() {
@@ -141,6 +143,8 @@ export default {
           <milestone-combobox
             v-model="releaseMilestones"
             :project-id="projectId"
+            :group-id="groupId"
+            :group-milestones-available="groupMilestonesAvailable"
             :extra-links="milestoneComboboxExtraLinks"
           />
         </div>

app/assets/javascripts/releases/stores/modules/detail/state.js

 export default ({
   projectId,
+  groupId,
+  groupMilestonesAvailable = false,
   projectPath,
   markdownDocsPath,
   markdownPreviewPath,
@@ -13,6 +15,8 @@ export default ({
   defaultBranch = null,
 }) => ({
   projectId,
+  groupId,
+  groupMilestonesAvailable: Boolean(groupMilestonesAvailable),
   projectPath,
   markdownDocsPath,
   markdownPreviewPath,

app/helpers/releases_helper.rb

@@ -51,11 +51,17 @@ module ReleasesHelper
     )
   end
 
+  def group_milestone_project_releases_available?(project)
+    false
+  end
+
   private
 
   def new_edit_pages_shared_data
     {
       project_id: @project.id,
+      group_id: @project.group&.id,
+      group_milestones_available: group_milestone_project_releases_available?(@project),
       project_path: @project.full_path,
       markdown_preview_path: preview_markdown_path(@project),
       markdown_docs_path: help_page_path('user/markdown'),
@@ -66,3 +72,5 @@ module ReleasesHelper
     }
   end
 end
+
+ReleasesHelper.prepend_if_ee('EE::ReleasesHelper')

doc/user/project/releases/index.md

@@ -130,6 +130,8 @@ In the interface, to add release notes to an existing Git tag:
 
 You can associate a release with one or more [project milestones](../milestones/index.md#project-milestones-and-group-milestones).
 
+[GitLab Premium](https://about.gitlab.com/pricing/) customers can specify [group milestones](../milestones/index.md#project-milestones-and-group-milestones) to associate with a release.
+
 You can do this in the user interface, or by including a `milestones` array in your request to
 the [Releases API](../../../api/releases/index.md#create-a-release).
 

ee/app/helpers/ee/releases_helper.rb

+# frozen_string_literal: true
+
+module EE
+  module ReleasesHelper
+    extend ActiveSupport::Concern
+    extend ::Gitlab::Utils::Override
+
+    override :group_milestone_project_releases_available?
+    def group_milestone_project_releases_available?(project)
+      project.feature_available?(:group_milestone_project_releases).to_s
+    end
+  end
+end

ee/changelogs/unreleased/232577-populate-the-milestone-dropdown-combobox-on-the-release-edit-new-p.yml

+---
+title: Resolve Populate the milestone dropdown combobox on the Release edit/new page
+  with Group milestones
+merge_request: 46027
+author:
+type: added

ee/spec/helpers/ee/releases_helper_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe ReleasesHelper do
+  let(:project) { build(:project, namespace: create(:group)) }
+  let(:release) { create(:release, project: project) }
+
+  # rubocop: disable CodeReuse/ActiveRecord
+  before do
+    helper.instance_variable_set(:@project, project)
+    helper.instance_variable_set(:@release, release)
+  end
+  # rubocop: enable CodeReuse/ActiveRecord
+
+  describe '#group_milestone_project_releases_available?' do
+    subject { helper.data_for_edit_release_page[:group_milestones_available] }
+
+    context 'when group milestones association with project releases is enabled' do
+      before do
+        stub_licensed_features(group_milestone_project_releases: true)
+      end
+
+      it { is_expected.to eq("true") }
+    end
+
+    context 'when group milestones association with project releases is disabled' do
+      before do
+        stub_licensed_features(group_milestone_project_releases: false)
+      end
+
+      it { is_expected.to eq("false") }
+    end
+  end
+end

locale/gitlab.pot

@@ -17370,6 +17370,9 @@ msgstr ""
 msgid "MilestoneCombobox|An error occurred while searching for milestones"
 msgstr ""
 
+msgid "MilestoneCombobox|Group milestones"
+msgstr ""
+
 msgid "MilestoneCombobox|Milestone"
 msgstr ""
 

spec/frontend/milestones/milestone_combobox_spec.js

@@ -6,7 +6,7 @@ import { GlLoadingIcon, GlSearchBoxByType, GlDropdownItem } from '@gitlab/ui';
 import { s__ } from '~/locale';
 import { ENTER_KEY } from '~/lib/utils/keys';
 import MilestoneCombobox from '~/milestones/components/milestone_combobox.vue';
-import { milestones as projectMilestones } from './mock_data';
+import { projectMilestones, groupMilestones } from './mock_data';
 import createStore from '~/milestones/stores/';
 
 const extraLinks = [
@@ -19,16 +19,21 @@ localVue.use(Vuex);
 
 describe('Milestone combobox component', () => {
   const projectId = '8';
+  const groupId = '24';
+  const groupMilestonesAvailable = true;
   const X_TOTAL_HEADER = 'x-total';
 
   let wrapper;
   let projectMilestonesApiCallSpy;
+  let groupMilestonesApiCallSpy;
   let searchApiCallSpy;
 
   const createComponent = (props = {}, attrs = {}) => {
     wrapper = mount(MilestoneCombobox, {
       propsData: {
         projectId,
+        groupId,
+        groupMilestonesAvailable,
         extraLinks,
         value: [],
         ...props,
@@ -56,6 +61,10 @@ describe('Milestone combobox component', () => {
       .fn()
       .mockReturnValue([200, projectMilestones, { [X_TOTAL_HEADER]: '6' }]);
 
+    groupMilestonesApiCallSpy = jest
+      .fn()
+      .mockReturnValue([200, groupMilestones, { [X_TOTAL_HEADER]: '6' }]);
+
     searchApiCallSpy = jest
       .fn()
       .mockReturnValue([200, projectMilestones, { [X_TOTAL_HEADER]: '6' }]);
@@ -64,6 +73,10 @@ describe('Milestone combobox component', () => {
       .onGet(`/api/v4/projects/${projectId}/milestones`)
       .reply(config => projectMilestonesApiCallSpy(config));
 
+    mock
+      .onGet(`/api/v4/groups/${groupId}/milestones`)
+      .reply(config => groupMilestonesApiCallSpy(config));
+
     mock.onGet(`/api/v4/projects/${projectId}/search`).reply(config => searchApiCallSpy(config));
   });
 
@@ -89,6 +102,11 @@ describe('Milestone combobox component', () => {
     findProjectMilestonesSection().findAll(GlDropdownItem);
   const findFirstProjectMilestonesDropdownItem = () => findProjectMilestonesDropdownItems().at(0);
 
+  const findGroupMilestonesSection = () => wrapper.find('[data-testid="group-milestones-section"]');
+  const findGroupMilestonesDropdownItems = () =>
+    findGroupMilestonesSection().findAll(GlDropdownItem);
+  const findFirstGroupMilestonesDropdownItem = () => findGroupMilestonesDropdownItems().at(0);
+
   //
   // Expecters
   //
@@ -100,6 +118,14 @@ describe('Milestone combobox component', () => {
       .includes(s__('MilestoneCombobox|An error occurred while searching for milestones'));
   };
 
+  const groupMilestoneSectionContainsErrorMessage = () => {
+    const groupMilestoneSection = findGroupMilestonesSection();
+
+    return groupMilestoneSection
+      .text()
+      .includes(s__('MilestoneCombobox|An error occurred while searching for milestones'));
+  };
+
   //
   // Convenience methods
   //
@@ -111,19 +137,25 @@ describe('Milestone combobox component', () => {
     findFirstProjectMilestonesDropdownItem().vm.$emit('click');
   };
 
+  const selectFirstGroupMilestone = () => {
+    findFirstGroupMilestonesDropdownItem().vm.$emit('click');
+  };
+
   const waitForRequests = ({ andClearMocks } = { andClearMocks: false }) =>
     axios.waitForAll().then(() => {
       if (andClearMocks) {
         projectMilestonesApiCallSpy.mockClear();
+        groupMilestonesApiCallSpy.mockClear();
       }
     });
 
   describe('initialization behavior', () => {
     beforeEach(createComponent);
 
-    it('initializes the dropdown with project milestones when mounted', () => {
+    it('initializes the dropdown with milestones when mounted', () => {
       return waitForRequests().then(() => {
         expect(projectMilestonesApiCallSpy).toHaveBeenCalledTimes(1);
+        expect(groupMilestonesApiCallSpy).toHaveBeenCalledTimes(1);
       });
     });
 
@@ -166,7 +198,7 @@ describe('Milestone combobox component', () => {
         return waitForRequests();
       });
 
-      it('renders the pre-selected project milestones', () => {
+      it('renders the pre-selected milestones', () => {
         expect(findButtonContent().text()).toBe('v0.1 + 5 more');
       });
     });
@@ -209,6 +241,8 @@ describe('Milestone combobox component', () => {
           .fn()
           .mockReturnValue([200, [], { [X_TOTAL_HEADER]: '0' }]);
 
+        groupMilestonesApiCallSpy = jest.fn().mockReturnValue([200, [], { [X_TOTAL_HEADER]: '0' }]);
+
         createComponent();
 
         return waitForRequests();
@@ -288,65 +322,195 @@ describe('Milestone combobox component', () => {
           expect(projectMilestoneSectionContainsErrorMessage()).toBe(true);
         });
       });
-    });
 
-    describe('selection', () => {
-      beforeEach(() => {
-        createComponent();
+      describe('selection', () => {
+        beforeEach(() => {
+          createComponent();
 
-        return waitForRequests();
-      });
+          return waitForRequests();
+        });
+
+        it('renders a checkmark by the selected item', async () => {
+          selectFirstProjectMilestone();
 
-      it('renders a checkmark by the selected item', async () => {
-        selectFirstProjectMilestone();
+          await localVue.nextTick();
 
-        await localVue.nextTick();
+          expect(
+            findFirstProjectMilestonesDropdownItem()
+              .find('span')
+              .classes('selected-item'),
+          ).toBe(false);
 
-        expect(
-          findFirstProjectMilestonesDropdownItem()
-            .find('span')
-            .classes('selected-item'),
-        ).toBe(false);
+          selectFirstProjectMilestone();
 
-        selectFirstProjectMilestone();
+          await localVue.nextTick();
 
-        return localVue.nextTick().then(() => {
           expect(
             findFirstProjectMilestonesDropdownItem()
               .find('span')
               .classes('selected-item'),
           ).toBe(true);
         });
+
+        describe('when a project milestones is selected', () => {
+          beforeEach(() => {
+            createComponent();
+            projectMilestonesApiCallSpy = jest
+              .fn()
+              .mockReturnValue([200, [{ title: 'v1.0' }], { [X_TOTAL_HEADER]: '1' }]);
+
+            return waitForRequests();
+          });
+
+          it("displays the project milestones name in the dropdown's button", async () => {
+            selectFirstProjectMilestone();
+            await localVue.nextTick();
+
+            expect(findButtonContent().text()).toBe(s__('MilestoneCombobox|No milestone'));
+
+            selectFirstProjectMilestone();
+
+            await localVue.nextTick();
+            expect(findButtonContent().text()).toBe('v1.0');
+          });
+
+          it('updates the v-model binding with the project milestone title', () => {
+            expect(wrapper.vm.value).toEqual([]);
+
+            selectFirstProjectMilestone();
+
+            expect(wrapper.vm.value).toEqual(['v1.0']);
+          });
+        });
       });
+    });
 
-      describe('when a project milestones is selected', () => {
+    describe('group milestones', () => {
+      describe('when the group milestones search returns results', () => {
         beforeEach(() => {
           createComponent();
-          projectMilestonesApiCallSpy = jest
+
+          return waitForRequests();
+        });
+
+        it('renders the group milestones section in the dropdown', () => {
+          expect(findGroupMilestonesSection().exists()).toBe(true);
+        });
+
+        it('renders the "Group milestones" heading with a total number indicator', () => {
+          expect(
+            findGroupMilestonesSection()
+              .find('[data-testid="milestone-results-section-header"]')
+              .text(),
+          ).toBe('Group milestones  6');
+        });
+
+        it("does not render an error message in the group milestone section's body", () => {
+          expect(groupMilestoneSectionContainsErrorMessage()).toBe(false);
+        });
+
+        it('renders each group milestones as a selectable item', () => {
+          const dropdownItems = findGroupMilestonesDropdownItems();
+
+          groupMilestones.forEach((milestone, i) => {
+            expect(dropdownItems.at(i).text()).toBe(milestone.title);
+          });
+        });
+      });
+
+      describe('when the group milestones search returns no results', () => {
+        beforeEach(() => {
+          groupMilestonesApiCallSpy = jest
             .fn()
-            .mockReturnValue([200, [{ title: 'v1.0' }], { [X_TOTAL_HEADER]: '1' }]);
+            .mockReturnValue([200, [], { [X_TOTAL_HEADER]: '0' }]);
+
+          createComponent();
 
           return waitForRequests();
         });
 
-        it("displays the project milestones name in the dropdown's button", async () => {
-          selectFirstProjectMilestone();
+        it('does not render the group milestones section in the dropdown', () => {
+          expect(findGroupMilestonesSection().exists()).toBe(false);
+        });
+      });
+
+      describe('when the group milestones search returns an error', () => {
+        beforeEach(() => {
+          groupMilestonesApiCallSpy = jest.fn().mockReturnValue([500]);
+          searchApiCallSpy = jest.fn().mockReturnValue([500]);
+
+          createComponent({ value: [] });
+
+          return waitForRequests();
+        });
+
+        it('renders the group milestones section in the dropdown', () => {
+          expect(findGroupMilestonesSection().exists()).toBe(true);
+        });
+
+        it("renders an error message in the group milestones section's body", () => {
+          expect(groupMilestoneSectionContainsErrorMessage()).toBe(true);
+        });
+      });
+
+      describe('selection', () => {
+        beforeEach(() => {
+          createComponent();
+
+          return waitForRequests();
+        });
+
+        it('renders a checkmark by the selected item', async () => {
+          selectFirstGroupMilestone();
+
           await localVue.nextTick();
 
-          expect(findButtonContent().text()).toBe(s__('MilestoneCombobox|No milestone'));
+          expect(
+            findFirstGroupMilestonesDropdownItem()
+              .find('span')
+              .classes('selected-item'),
+          ).toBe(false);
 
-          selectFirstProjectMilestone();
+          selectFirstGroupMilestone();
 
           await localVue.nextTick();
-          expect(findButtonContent().text()).toBe('v1.0');
+
+          expect(
+            findFirstGroupMilestonesDropdownItem()
+              .find('span')
+              .classes('selected-item'),
+          ).toBe(true);
         });
 
-        it('updates the v-model binding with the project milestone title', () => {
-          expect(wrapper.vm.value).toEqual([]);
+        describe('when a group milestones is selected', () => {
+          beforeEach(() => {
+            createComponent();
+            groupMilestonesApiCallSpy = jest
+              .fn()
+              .mockReturnValue([200, [{ title: 'group-v1.0' }], { [X_TOTAL_HEADER]: '1' }]);
 
-          selectFirstProjectMilestone();
+            return waitForRequests();
+          });
+
+          it("displays the group milestones name in the dropdown's button", async () => {
+            selectFirstGroupMilestone();
+            await localVue.nextTick();
 
-          expect(wrapper.vm.value).toEqual(['v1.0']);
+            expect(findButtonContent().text()).toBe(s__('MilestoneCombobox|No milestone'));
+
+            selectFirstGroupMilestone();
+
+            await localVue.nextTick();
+            expect(findButtonContent().text()).toBe('group-v1.0');
+          });
+
+          it('updates the v-model binding with the group milestone title', () => {
+            expect(wrapper.vm.value).toEqual([]);
+
+            selectFirstGroupMilestone();
+
+            expect(wrapper.vm.value).toEqual(['group-v1.0']);
+          });
         });
       });
     });

spec/frontend/milestones/mock_data.js

-export const milestones = [
+export const projectMilestones = [
   {
     id: 41,
     iid: 6,
@@ -79,4 +79,94 @@ export const milestones = [
   },
 ];
 
-export default milestones;
+export const groupMilestones = [
+  {
+    id: 141,
+    iid: 16,
+    project_id: 8,
+    group_id: 12,
+    title: 'group-v0.1',
+    description: '',
+    state: 'active',
+    created_at: '2020-04-04T01:30:40.051Z',
+    updated_at: '2020-04-04T01:30:40.051Z',
+    due_date: null,
+    start_date: null,
+    web_url: 'http://127.0.0.1:3000/h5bp/html5-boilerplate/-/milestones/6',
+  },
+  {
+    id: 140,
+    iid: 15,
+    project_id: 8,
+    group_id: 12,
+    title: 'group-v4.0',
+    description: 'Laboriosam nisi sapiente dolores et magnam nobis ad earum.',
+    state: 'closed',
+    created_at: '2020-01-13T19:39:15.191Z',
+    updated_at: '2020-01-13T19:39:15.191Z',
+    due_date: null,
+    start_date: null,
+    web_url: 'http://127.0.0.1:3000/h5bp/html5-boilerplate/-/milestones/5',
+  },
+  {
+    id: 139,
+    iid: 14,
+    project_id: 8,
+    group_id: 12,
+    title: 'group-v3.0',
+    description: 'Necessitatibus illo alias et repellat dolorum assumenda ut.',
+    state: 'closed',
+    created_at: '2020-01-13T19:39:15.176Z',
+    updated_at: '2020-01-13T19:39:15.176Z',
+    due_date: null,
+    start_date: null,
+    web_url: 'http://127.0.0.1:3000/h5bp/html5-boilerplate/-/milestones/4',
+  },
+  {
+    id: 138,
+    iid: 13,
+    project_id: 8,
+    group_id: 12,
+    title: 'group-v2.0',
+    description: 'Doloribus qui repudiandae iste sit.',
+    state: 'closed',
+    created_at: '2020-01-13T19:39:15.161Z',
+    updated_at: '2020-01-13T19:39:15.161Z',
+    due_date: null,
+    start_date: null,
+    web_url: 'http://127.0.0.1:3000/h5bp/html5-boilerplate/-/milestones/3',
+  },
+  {
+    id: 137,
+    iid: 12,
+    project_id: 8,
+    group_id: 12,
+    title: 'group-v1.0',
+    description: 'Illo sint odio officia ea.',
+    state: 'closed',
+    created_at: '2020-01-13T19:39:15.146Z',
+    updated_at: '2020-01-13T19:39:15.146Z',
+    due_date: null,
+    start_date: null,
+    web_url: 'http://127.0.0.1:3000/h5bp/html5-boilerplate/-/milestones/2',
+  },
+  {
+    id: 136,
+    iid: 11,
+    project_id: 8,
+    group_id: 12,
+    title: 'group-v0.0',
+    description: 'Sed quae facilis deleniti at delectus assumenda nobis veritatis.',
+    state: 'active',
+    created_at: '2020-01-13T19:39:15.127Z',
+    updated_at: '2020-01-13T19:39:15.127Z',
+    due_date: null,
+    start_date: null,
+    web_url: 'http://127.0.0.1:3000/h5bp/html5-boilerplate/-/milestones/1',
+  },
+];
+
+export default {
+  projectMilestones,
+  groupMilestones,
+};

spec/frontend/milestones/stores/actions_spec.js

@@ -4,6 +4,7 @@ import * as actions from '~/milestones/stores/actions';
 import * as types from '~/milestones/stores/mutation_types';
 
 let mockProjectMilestonesReturnValue;
+let mockGroupMilestonesReturnValue;
 let mockProjectSearchReturnValue;
 
 jest.mock('~/api', () => ({
@@ -13,6 +14,7 @@ jest.mock('~/api', () => ({
   default: {
     projectMilestones: () => mockProjectMilestonesReturnValue,
     projectSearch: () => mockProjectSearchReturnValue,
+    groupMilestones: () => mockGroupMilestonesReturnValue,
   },
 }));
 
@@ -32,6 +34,24 @@ describe('Milestone combobox Vuex store actions', () => {
     });
   });
 
+  describe('setGroupId', () => {
+    it(`commits ${types.SET_GROUP_ID} with the new group ID`, () => {
+      const groupId = '123';
+      testAction(actions.setGroupId, groupId, state, [
+        { type: types.SET_GROUP_ID, payload: groupId },
+      ]);
+    });
+  });
+
+  describe('setGroupMilestonesAvailable', () => {
+    it(`commits ${types.SET_GROUP_MILESTONES_AVAILABLE} with the boolean indicating if group milestones are available (Premium)`, () => {
+      state.groupMilestonesAvailable = true;
+      testAction(actions.setGroupMilestonesAvailable, state.groupMilestonesAvailable, state, [
+        { type: types.SET_GROUP_MILESTONES_AVAILABLE, payload: state.groupMilestonesAvailable },
+      ]);
+    });
+  });
+
   describe('setSelectedMilestones', () => {
     it(`commits ${types.SET_SELECTED_MILESTONES} with the new selected milestones name`, () => {
       const selectedMilestones = ['v1.2.3'];
@@ -66,19 +86,38 @@ describe('Milestone combobox Vuex store actions', () => {
   });
 
   describe('search', () => {
-    it(`commits ${types.SET_SEARCH_QUERY} with the new search query`, () => {
-      const searchQuery = 'v1.0';
-      testAction(
-        actions.search,
-        searchQuery,
-        state,
-        [{ type: types.SET_SEARCH_QUERY, payload: searchQuery }],
-        [{ type: 'searchMilestones' }],
-      );
+    describe('when project has license to add group milestones', () => {
+      it(`commits ${types.SET_SEARCH_QUERY} with the new search query to search for project and group milestones`, () => {
+        const getters = {
+          groupMilestonesEnabled: () => true,
+        };
+
+        const searchQuery = 'v1.0';
+        testAction(
+          actions.search,
+          searchQuery,
+          { ...state, ...getters },
+          [{ type: types.SET_SEARCH_QUERY, payload: searchQuery }],
+          [{ type: 'searchProjectMilestones' }, { type: 'searchGroupMilestones' }],
+        );
+      });
+    });
+
+    describe('when project does not have license to add group milestones', () => {
+      it(`commits ${types.SET_SEARCH_QUERY} with the new search query to search for project milestones`, () => {
+        const searchQuery = 'v1.0';
+        testAction(
+          actions.search,
+          searchQuery,
+          state,
+          [{ type: types.SET_SEARCH_QUERY, payload: searchQuery }],
+          [{ type: 'searchProjectMilestones' }],
+        );
+      });
     });
   });
 
-  describe('searchMilestones', () => {
+  describe('searchProjectMilestones', () => {
     describe('when the search is successful', () => {
       const projectSearchApiResponse = { data: [{ title: 'v1.0' }] };
 
@@ -87,7 +126,7 @@ describe('Milestone combobox Vuex store actions', () => {
       });
 
       it(`commits ${types.REQUEST_START}, ${types.RECEIVE_PROJECT_MILESTONES_SUCCESS} with the response from the API, and ${types.REQUEST_FINISH}`, () => {
-        return testAction(actions.searchMilestones, undefined, state, [
+        return testAction(actions.searchProjectMilestones, undefined, state, [
           { type: types.REQUEST_START },
           { type: types.RECEIVE_PROJECT_MILESTONES_SUCCESS, payload: projectSearchApiResponse },
           { type: types.REQUEST_FINISH },
@@ -103,7 +142,7 @@ describe('Milestone combobox Vuex store actions', () => {
       });
 
       it(`commits ${types.REQUEST_START}, ${types.RECEIVE_PROJECT_MILESTONES_ERROR} with the error object, and ${types.REQUEST_FINISH}`, () => {
-        return testAction(actions.searchMilestones, undefined, state, [
+        return testAction(actions.searchProjectMilestones, undefined, state, [
           { type: types.REQUEST_START },
           { type: types.RECEIVE_PROJECT_MILESTONES_ERROR, payload: error },
           { type: types.REQUEST_FINISH },
@@ -112,7 +151,71 @@ describe('Milestone combobox Vuex store actions', () => {
     });
   });
 
+  describe('searchGroupMilestones', () => {
+    describe('when the search is successful', () => {
+      const groupSearchApiResponse = { data: [{ title: 'group-v1.0' }] };
+
+      beforeEach(() => {
+        mockGroupMilestonesReturnValue = Promise.resolve(groupSearchApiResponse);
+      });
+
+      it(`commits ${types.REQUEST_START}, ${types.RECEIVE_GROUP_MILESTONES_SUCCESS} with the response from the API, and ${types.REQUEST_FINISH}`, () => {
+        return testAction(actions.searchGroupMilestones, undefined, state, [
+          { type: types.REQUEST_START },
+          { type: types.RECEIVE_GROUP_MILESTONES_SUCCESS, payload: groupSearchApiResponse },
+          { type: types.REQUEST_FINISH },
+        ]);
+      });
+    });
+
+    describe('when the search fails', () => {
+      const error = new Error('Something went wrong!');
+
+      beforeEach(() => {
+        mockGroupMilestonesReturnValue = Promise.reject(error);
+      });
+
+      it(`commits ${types.REQUEST_START}, ${types.RECEIVE_GROUP_MILESTONES_ERROR} with the error object, and ${types.REQUEST_FINISH}`, () => {
+        return testAction(actions.searchGroupMilestones, undefined, state, [
+          { type: types.REQUEST_START },
+          { type: types.RECEIVE_GROUP_MILESTONES_ERROR, payload: error },
+          { type: types.REQUEST_FINISH },
+        ]);
+      });
+    });
+  });
+
   describe('fetchMilestones', () => {
+    describe('when project has license to add group milestones', () => {
+      it(`dispatchs fetchProjectMilestones and fetchGroupMilestones`, () => {
+        const getters = {
+          groupMilestonesEnabled: () => true,
+        };
+
+        testAction(
+          actions.fetchMilestones,
+          undefined,
+          { ...state, ...getters },
+          [],
+          [{ type: 'fetchProjectMilestones' }, { type: 'fetchGroupMilestones' }],
+        );
+      });
+    });
+
+    describe('when project does not have license to add group milestones', () => {
+      it(`dispatchs fetchProjectMilestones`, () => {
+        testAction(
+          actions.fetchMilestones,
+          undefined,
+          state,
+          [],
+          [{ type: 'fetchProjectMilestones' }],
+        );
+      });
+    });
+  });
+
+  describe('fetchProjectMilestones', () => {
     describe('when the fetch is successful', () => {
       const projectMilestonesApiResponse = { data: [{ title: 'v1.0' }] };
 
@@ -121,7 +224,7 @@ describe('Milestone combobox Vuex store actions', () => {
       });
 
       it(`commits ${types.REQUEST_START}, ${types.RECEIVE_PROJECT_MILESTONES_SUCCESS} with the response from the API, and ${types.REQUEST_FINISH}`, () => {
-        return testAction(actions.fetchMilestones, undefined, state, [
+        return testAction(actions.fetchProjectMilestones, undefined, state, [
           { type: types.REQUEST_START },
           { type: types.RECEIVE_PROJECT_MILESTONES_SUCCESS, payload: projectMilestonesApiResponse },
           { type: types.REQUEST_FINISH },
@@ -137,7 +240,7 @@ describe('Milestone combobox Vuex store actions', () => {
       });
 
       it(`commits ${types.REQUEST_START}, ${types.RECEIVE_PROJECT_MILESTONES_ERROR} with the error object, and ${types.REQUEST_FINISH}`, () => {
-        return testAction(actions.fetchMilestones, undefined, state, [
+        return testAction(actions.fetchProjectMilestones, undefined, state, [
           { type: types.REQUEST_START },
           { type: types.RECEIVE_PROJECT_MILESTONES_ERROR, payload: error },
           { type: types.REQUEST_FINISH },
@@ -145,4 +248,38 @@ describe('Milestone combobox Vuex store actions', () => {
       });
     });
   });
+
+  describe('fetchGroupMilestones', () => {
+    describe('when the fetch is successful', () => {
+      const groupMilestonesApiResponse = { data: [{ title: 'group-v1.0' }] };
+
+      beforeEach(() => {
+        mockGroupMilestonesReturnValue = Promise.resolve(groupMilestonesApiResponse);
+      });
+
+      it(`commits ${types.REQUEST_START}, ${types.RECEIVE_GROUP_MILESTONES_SUCCESS} with the response from the API, and ${types.REQUEST_FINISH}`, () => {
+        return testAction(actions.fetchGroupMilestones, undefined, state, [
+          { type: types.REQUEST_START },
+          { type: types.RECEIVE_GROUP_MILESTONES_SUCCESS, payload: groupMilestonesApiResponse },
+          { type: types.REQUEST_FINISH },
+        ]);
+      });
+    });
+
+    describe('when the fetch fails', () => {
+      const error = new Error('Something went wrong!');
+
+      beforeEach(() => {
+        mockGroupMilestonesReturnValue = Promise.reject(error);
+      });
+
+      it(`commits ${types.REQUEST_START}, ${types.RECEIVE_GROUP_MILESTONES_ERROR} with the error object, and ${types.REQUEST_FINISH}`, () => {
+        return testAction(actions.fetchGroupMilestones, undefined, state, [
+          { type: types.REQUEST_START },
+          { type: types.RECEIVE_GROUP_MILESTONES_ERROR, payload: error },
+          { type: types.REQUEST_FINISH },
+        ]);
+      });
+    });
+  });
 });

spec/frontend/milestones/stores/getter_spec.js

@@ -12,4 +12,22 @@ describe('Milestone comboxbox Vuex store getters', () => {
       expect(getters.isLoading({ requestCount })).toBe(isLoading);
     });
   });
+
+  describe('groupMilestonesEnabled', () => {
+    it.each`
+      groupId | groupMilestonesAvailable | groupMilestonesEnabled
+      ${'1'}  | ${true}                  | ${true}
+      ${'1'}  | ${false}                 | ${false}
+      ${''}   | ${true}                  | ${false}
+      ${''}   | ${false}                 | ${false}
+      ${null} | ${true}                  | ${false}
+    `(
+      'returns true when groupId is a truthy string and groupMilestonesAvailable is true',
+      ({ groupId, groupMilestonesAvailable, groupMilestonesEnabled }) => {
+        expect(getters.groupMilestonesEnabled({ groupId, groupMilestonesAvailable })).toBe(
+          groupMilestonesEnabled,
+        );
+      },
+    );
+  });
 });

spec/frontend/milestones/stores/mutations_spec.js

@@ -14,6 +14,7 @@ describe('Milestones combobox Vuex store mutations', () => {
       expect(state).toEqual({
         projectId: null,
         groupId: null,
+        groupMilestonesAvailable: false,
         searchQuery: '',
         matches: {
           projectMilestones: {
@@ -21,6 +22,11 @@ describe('Milestones combobox Vuex store mutations', () => {
             totalCount: 0,
             error: null,
           },
+          groupMilestones: {
+            list: [],
+            totalCount: 0,
+            error: null,
+          },
         },
         selectedMilestones: [],
         requestCount: 0,
@@ -37,6 +43,24 @@ describe('Milestones combobox Vuex store mutations', () => {
     });
   });
 
+  describe(`${types.SET_GROUP_ID}`, () => {
+    it('updates the group ID', () => {
+      const newGroupId = '8';
+      mutations[types.SET_GROUP_ID](state, newGroupId);
+
+      expect(state.groupId).toBe(newGroupId);
+    });
+  });
+
+  describe(`${types.SET_GROUP_MILESTONES_AVAILABLE}`, () => {
+    it('sets boolean indicating if group milestones are available', () => {
+      const groupMilestonesAvailable = true;
+      mutations[types.SET_GROUP_MILESTONES_AVAILABLE](state, groupMilestonesAvailable);
+
+      expect(state.groupMilestonesAvailable).toBe(groupMilestonesAvailable);
+    });
+  });
+
   describe(`${types.SET_SELECTED_MILESTONES}`, () => {
     it('sets the selected milestones', () => {
       const selectedMilestones = ['v1.2.3'];
@@ -60,7 +84,7 @@ describe('Milestones combobox Vuex store mutations', () => {
     });
   });
 
-  describe(`${types.ADD_SELECTED_MILESTONESs}`, () => {
+  describe(`${types.ADD_SELECTED_MILESTONES}`, () => {
     it('adds the selected milestones', () => {
       const selectedMilestone = 'v1.2.3';
       mutations[types.ADD_SELECTED_MILESTONE](state, selectedMilestone);
@@ -170,4 +194,57 @@ describe('Milestones combobox Vuex store mutations', () => {
       });
     });
   });
+
+  describe(`${types.RECEIVE_GROUP_MILESTONES_SUCCESS}`, () => {
+    it('updates state.matches.groupMilestones based on the provided API response', () => {
+      const response = {
+        data: [
+          {
+            title: 'group-0.1',
+          },
+          {
+            title: 'group-0.2',
+          },
+        ],
+        headers: {
+          'x-total': 2,
+        },
+      };
+
+      mutations[types.RECEIVE_GROUP_MILESTONES_SUCCESS](state, response);
+
+      expect(state.matches.groupMilestones).toEqual({
+        list: [
+          {
+            title: 'group-0.1',
+          },
+          {
+            title: 'group-0.2',
+          },
+        ],
+        error: null,
+        totalCount: 2,
+      });
+    });
+
+    describe(`${types.RECEIVE_GROUP_MILESTONES_ERROR}`, () => {
+      it('updates state.matches.groupMilestones to an empty state with the error object', () => {
+        const error = new Error('Something went wrong!');
+
+        state.matches.groupMilestones = {
+          list: [{ title: 'group-0.1' }],
+          totalCount: 1,
+          error: null,
+        };
+
+        mutations[types.RECEIVE_GROUP_MILESTONES_ERROR](state, error);
+
+        expect(state.matches.groupMilestones).toEqual({
+          list: [],
+          totalCount: 0,
+          error,
+        });
+      });
+    });
+  });
 });

spec/frontend/releases/components/app_edit_new_spec.js

@@ -27,6 +27,8 @@ describe('Release edit/new component', () => {
       updateReleaseApiDocsPath: 'path/to/update/release/api/docs',
       releasesPagePath: 'path/to/releases/page',
       projectId: '8',
+      groupId: '42',
+      groupMilestonesAvailable: true,
     };
 
     actions = {

spec/helpers/releases_helper_spec.rb

@@ -64,6 +64,8 @@ RSpec.describe ReleasesHelper do
     describe '#data_for_edit_release_page' do
       it 'has the needed data to display the "edit release" page' do
         keys = %i(project_id
+                  group_id
+                  group_milestones_available
                   project_path
                   tag_name
                   markdown_preview_path
@@ -81,6 +83,8 @@ RSpec.describe ReleasesHelper do
     describe '#data_for_new_release_page' do
       it 'has the needed data to display the "new release" page' do
         keys = %i(project_id
+                  group_id
+                  group_milestones_available
                   project_path
                   releases_page_path
                   markdown_preview_path