Add User List as a Choosable Strategy

This allows users to use pre-defined lists of users to toggle a feature
flag on or off.

ee/app/assets/javascripts/api.js

@@ -308,43 +308,36 @@ export default {
     return axios.put(`${url}/${node.id}`, node);
   },
 
-  fetchFeatureFlagUserLists(version, id) {
-    const url = Api.buildUrl(this.featureFlagUserLists)
-      .replace(':version', version)
-      .replace(':id', id);
+  fetchFeatureFlagUserLists(id) {
+    const url = Api.buildUrl(this.featureFlagUserLists).replace(':id', id);
 
     return axios.get(url);
   },
 
-  createFeatureFlagUserList(version, id, list) {
-    const url = Api.buildUrl(this.featureFlagUserLists)
-      .replace(':version', version)
-      .replace(':id', id);
+  createFeatureFlagUserList(id, list) {
+    const url = Api.buildUrl(this.featureFlagUserLists).replace(':id', id);
 
     return axios.post(url, list);
   },
 
-  fetchFeatureFlagUserList(version, id, listIid) {
+  fetchFeatureFlagUserList(id, listIid) {
     const url = Api.buildUrl(this.featureFlagUserList)
-      .replace(':version', version)
       .replace(':id', id)
       .replace(':list_iid', listIid);
 
     return axios.get(url);
   },
 
-  updateFeatureFlagUserList(version, id, list) {
+  updateFeatureFlagUserList(id, list) {
     const url = Api.buildUrl(this.featureFlagUserList)
-      .replace(':version', version)
       .replace(':id', id)
       .replace(':list_iid', list.iid);
 
     return axios.put(url, list);
   },
 
-  deleteFeatureFlagUserList(version, id, listIid) {
+  deleteFeatureFlagUserList(id, listIid) {
     const url = Api.buildUrl(this.featureFlagUserList)
-      .replace(':version', version)
       .replace(':id', id)
       .replace(':list_iid', listIid);
 

ee/app/assets/javascripts/feature_flags/components/edit_feature_flag.vue

@@ -31,6 +31,10 @@ export default {
       type: String,
       required: true,
     },
+    projectId: {
+      type: String,
+      required: true,
+    },
   },
   translations: {
     legacyFlagAlert: s__(
@@ -101,6 +105,7 @@ export default {
       <feature-flag-form
         :name="name"
         :description="description"
+        :project-id="projectId"
         :scopes="scopes"
         :strategies="strategies"
         :cancel-path="path"

ee/app/assets/javascripts/feature_flags/components/form.vue

@@ -10,7 +10,9 @@ import {
   GlFormCheckbox,
   GlSprintf,
 } from '@gitlab/ui';
+import Api from 'ee/api';
 import { s__ } from '~/locale';
+import flash, { FLASH_TYPES } from '~/flash';
 import featureFlagsMixin from '~/vue_shared/mixins/gl_feature_flags_mixin';
 import ToggleButton from '~/vue_shared/components/toggle_button.vue';
 import Icon from '~/vue_shared/components/icon.vue';
@@ -60,6 +62,10 @@ export default {
       required: false,
       default: '',
     },
+    projectId: {
+      type: String,
+      required: true,
+    },
     scopes: {
       type: Array,
       required: false,
@@ -118,6 +124,7 @@ export default {
       formStrategies: cloneDeep(this.strategies),
 
       newScope: '',
+      userLists: [],
     };
   },
   computed: {
@@ -141,6 +148,17 @@ export default {
       return this.formStrategies.length > 1;
     },
   },
+  mounted() {
+    if (this.supportsStrategies) {
+      Api.fetchFeatureFlagUserLists(this.projectId)
+        .then(({ data }) => {
+          this.userLists = data;
+        })
+        .catch(() => {
+          flash(s__('FeatureFlags|There was an error retrieving user lists'), FLASH_TYPES.WARNING);
+        });
+    }
+  },
   methods: {
     addStrategy() {
       this.formStrategies.push({ name: '', parameters: {}, scopes: [] });
@@ -252,13 +270,8 @@ export default {
         scope.rolloutUserIds.length > 0 &&
         scope.rolloutStrategy === ROLLOUT_STRATEGY_PERCENT_ROLLOUT;
     },
-    onFormStrategyChange({ id, name, parameters, scopes }, index) {
-      Object.assign(this.filteredStrategies[index], {
-        id,
-        name,
-        parameters,
-        scopes,
-      });
+    onFormStrategyChange(strategy, index) {
+      Object.assign(this.filteredStrategies[index], strategy);
     },
   },
 };
@@ -313,6 +326,7 @@ export default {
             :index="index"
             :endpoint="environmentsEndpoint"
             :can-delete="canDeleteStrategy"
+            :user-lists="userLists"
             @change="onFormStrategyChange($event, index)"
             @delete="deleteStrategy(strategy)"
           />

ee/app/assets/javascripts/feature_flags/components/new_feature_flag.vue

@@ -30,6 +30,10 @@ export default {
       type: String,
       required: true,
     },
+    projectId: {
+      type: String,
+      required: true,
+    },
   },
   translations: {
     newFlagAlert: NEW_FLAG_ALERT,
@@ -78,6 +82,7 @@ export default {
     </div>
 
     <feature-flag-form
+      :project-id="projectId"
       :cancel-path="path"
       :submit-text="s__('FeatureFlags|Create feature flag')"
       :scopes="scopes"

ee/app/assets/javascripts/feature_flags/components/strategy.vue

@@ -16,6 +16,7 @@ import {
   ROLLOUT_STRATEGY_ALL_USERS,
   ROLLOUT_STRATEGY_PERCENT_ROLLOUT,
   ROLLOUT_STRATEGY_USER_ID,
+  ROLLOUT_STRATEGY_GITLAB_USER_LIST,
 } from '../constants';
 
 import NewEnvironmentsDropdown from './new_environments_dropdown.vue';
@@ -53,10 +54,16 @@ export default {
       type: Boolean,
       required: true,
     },
+    userLists: {
+      type: Array,
+      required: false,
+      default: () => [],
+    },
   },
   ROLLOUT_STRATEGY_ALL_USERS,
   ROLLOUT_STRATEGY_PERCENT_ROLLOUT,
   ROLLOUT_STRATEGY_USER_ID,
+  ROLLOUT_STRATEGY_GITLAB_USER_LIST,
 
   translations: {
     allEnvironments: __('All environments'),
@@ -69,6 +76,9 @@ export default {
     rolloutPercentageLabel: s__('FeatureFlag|Percentage'),
     rolloutUserIdsDescription: __('Enter one or more user ID separated by commas'),
     rolloutUserIdsLabel: s__('FeatureFlag|User IDs'),
+    rolloutUserListLabel: s__('FeatureFlag|List'),
+    rolloutUserListDescription: s__('FeatureFlag|Select a user list'),
+    rolloutUserListNoListError: s__('FeatureFlag|There are no configured user lists'),
     strategyTypeDescription: __('Select strategy activation method'),
     strategyTypeLabel: s__('FeatureFlag|Type'),
   },
@@ -83,6 +93,8 @@ export default {
           : '',
       formUserIds:
         this.strategy.name === ROLLOUT_STRATEGY_USER_ID ? this.strategy.parameters.userIds : '',
+      formUserListId:
+        this.strategy.name === ROLLOUT_STRATEGY_GITLAB_USER_LIST ? this.strategy.userListId : '',
       strategies: [
         {
           value: ROLLOUT_STRATEGY_ALL_USERS,
@@ -96,6 +108,10 @@ export default {
           value: ROLLOUT_STRATEGY_USER_ID,
           text: __('User IDs'),
         },
+        {
+          value: ROLLOUT_STRATEGY_GITLAB_USER_LIST,
+          text: __('List'),
+        },
       ],
     };
   },
@@ -109,6 +125,9 @@ export default {
     strategyUserIdsId() {
       return `strategy-user-ids-${this.index}`;
     },
+    strategyUserListId() {
+      return `strategy-user-list-${this.index}`;
+    },
     environmentsDropdownId() {
       return `environments-dropdown-${this.index}`;
     },
@@ -118,6 +137,9 @@ export default {
     isUserWithId() {
       return this.isStrategyType(ROLLOUT_STRATEGY_USER_ID);
     },
+    isUserList() {
+      return this.isStrategyType(ROLLOUT_STRATEGY_GITLAB_USER_LIST);
+    },
     appliesToAllEnvironments() {
       return (
         this.filteredEnvironments.length === 0 ||
@@ -128,6 +150,12 @@ export default {
     filteredEnvironments() {
       return this.environments.filter(e => !e.shouldBeDestroyed);
     },
+    userListOptions() {
+      return this.userLists.map(({ name, id }) => ({ value: id, text: name }));
+    },
+    hasUserLists() {
+      return this.userListOptions.length > 0;
+    },
   },
   methods: {
     addEnvironment(environment) {
@@ -140,6 +168,10 @@ export default {
     },
     onStrategyChange() {
       const parameters = {};
+      const strategy = {
+        ...this.formStrategy,
+        scopes: this.environments,
+      };
       switch (this.formStrategy.name) {
         case ROLLOUT_STRATEGY_PERCENT_ROLLOUT:
           parameters.percentage = this.formPercentage;
@@ -148,13 +180,15 @@ export default {
         case ROLLOUT_STRATEGY_USER_ID:
           parameters.userIds = this.formUserIds;
           break;
+        case ROLLOUT_STRATEGY_GITLAB_USER_LIST:
+          strategy.userListId = this.formUserListId;
+          break;
         default:
           break;
       }
       this.$emit('change', {
-        ...this.formStrategy,
+        ...strategy,
         parameters,
-        scopes: this.environments,
       });
     },
     removeScope(environment) {
@@ -189,7 +223,7 @@ export default {
         </gl-form-group>
       </div>
 
-      <div>
+      <div data-testid="strategy">
         <gl-form-group
           v-if="isPercentRollout"
           :label="$options.translations.rolloutPercentageLabel"
@@ -221,6 +255,21 @@ export default {
             @input="onStrategyChange"
           />
         </gl-form-group>
+        <gl-form-group
+          v-if="isUserList"
+          :state="hasUserLists"
+          :invalid-feedback="$options.translations.rolloutUserListNoListError"
+          :label="$options.translations.rolloutUserListLabel"
+          :description="$options.translations.rolloutUserListDescription"
+          :label-for="strategyUserListId"
+        >
+          <gl-form-select
+            :id="strategyUserListId"
+            v-model="formUserListId"
+            :options="userListOptions"
+            @change="onStrategyChange"
+          />
+        </gl-form-group>
       </div>
 
       <div class="align-self-end align-self-md-stretch order-first offset-md-0 order-md-0 ml-auto">

ee/app/assets/javascripts/feature_flags/constants.js

@@ -4,6 +4,7 @@ import { s__ } from '~/locale';
 export const ROLLOUT_STRATEGY_ALL_USERS = 'default';
 export const ROLLOUT_STRATEGY_PERCENT_ROLLOUT = 'gradualRolloutUserId';
 export const ROLLOUT_STRATEGY_USER_ID = 'userWithId';
+export const ROLLOUT_STRATEGY_GITLAB_USER_LIST = 'gitlabUserList';
 
 export const PERCENT_ROLLOUT_GROUP_ID = 'default';
 

ee/app/assets/javascripts/feature_flags/edit.js

@@ -15,6 +15,7 @@ export default () => {
           endpoint: el.dataset.endpoint,
           path: el.dataset.featureFlagsPath,
           environmentsEndpoint: el.dataset.environmentsEndpoint,
+          projectId: el.dataset.projectId,
         },
       });
     },

ee/app/assets/javascripts/feature_flags/new.js

@@ -15,6 +15,7 @@ export default () => {
           endpoint: el.dataset.endpoint,
           path: el.dataset.featureFlagsPath,
           environmentsEndpoint: el.dataset.environmentsEndpoint,
+          projectId: el.dataset.projectId,
         },
       });
     },

ee/app/assets/javascripts/feature_flags/store/modules/helpers.js

@@ -3,6 +3,7 @@ import {
   ROLLOUT_STRATEGY_ALL_USERS,
   ROLLOUT_STRATEGY_PERCENT_ROLLOUT,
   ROLLOUT_STRATEGY_USER_ID,
+  ROLLOUT_STRATEGY_GITLAB_USER_LIST,
   INTERNAL_ID_PREFIX,
   DEFAULT_PERCENT_ROLLOUT,
   PERCENT_ROLLOUT_GROUP_ID,
@@ -173,6 +174,7 @@ export const mapStrategiesToViewModel = strategiesFromRails =>
     id: s.id,
     name: s.name,
     parameters: mapStrategiesParametersToViewModel(s.parameters),
+    userListId: s.user_list?.id,
     // eslint-disable-next-line no-underscore-dangle
     shouldBeDestroyed: Boolean(s._destroy),
     scopes: mapStrategyScopesToView(s.scopes),
@@ -185,18 +187,27 @@ const mapStrategiesParametersToRails = params => {
   return params;
 };
 
+const mapStrategyToRails = strategy => {
+  const mappedStrategy = {
+    id: strategy.id,
+    name: strategy.name,
+    _destroy: strategy.shouldBeDestroyed,
+    scopes_attributes: mapStrategyScopesToRails(strategy.scopes || []),
+    parameters: mapStrategiesParametersToRails(strategy.parameters),
+  };
+
+  if (strategy.name === ROLLOUT_STRATEGY_GITLAB_USER_LIST) {
+    mappedStrategy.user_list_id = strategy.userListId;
+  }
+  return mappedStrategy;
+};
+
 export const mapStrategiesToRails = params => ({
   operations_feature_flag: {
     name: params.name,
     description: params.description,
     version: params.version,
     active: params.active,
-    strategies_attributes: (params.strategies || []).map(s => ({
-      id: s.id,
-      name: s.name,
-      parameters: mapStrategiesParametersToRails(s.parameters),
-      _destroy: s.shouldBeDestroyed,
-      scopes_attributes: mapStrategyScopesToRails(s.scopes || []),
-    })),
+    strategies_attributes: (params.strategies || []).map(mapStrategyToRails),
   },
 });

ee/app/views/projects/feature_flags/edit.html.haml

@@ -2,4 +2,7 @@
 - breadcrumb_title @feature_flag.name
 - page_title s_('FeatureFlags|Edit Feature Flag')
 
-#js-edit-feature-flag{ data: { endpoint: project_feature_flag_path(@project, @feature_flag), feature_flags_path: project_feature_flags_path(@project), environments_endpoint: search_project_environments_path(@project, format: :json)} }
+#js-edit-feature-flag{ data: { endpoint: project_feature_flag_path(@project, @feature_flag),
+                      project_id: @project.id,
+                      feature_flags_path: project_feature_flags_path(@project),
+                      environments_endpoint: search_project_environments_path(@project, format: :json)} }

ee/app/views/projects/feature_flags/new.html.haml

@@ -3,4 +3,7 @@
 - breadcrumb_title s_('FeatureFlags|New')
 - page_title s_('FeatureFlags|New Feature Flag')
 
-#js-new-feature-flag{ data: { endpoint: project_feature_flags_path(@project, format: :json), feature_flags_path: project_feature_flags_path(@project), environments_endpoint: search_project_environments_path(@project, format: :json) } }
+#js-new-feature-flag{ data: { endpoint: project_feature_flags_path(@project, format: :json),
+                     feature_flags_path: project_feature_flags_path(@project),
+                     environments_endpoint: search_project_environments_path(@project, format: :json),
+                     project_id: @project.id } }

ee/spec/frontend/api_spec.js

@@ -788,7 +788,7 @@ describe('Api', () => {
       it('GETs the right url', () => {
         mock.onGet(expectedUrl).replyOnce(200, []);
 
-        return Api.fetchFeatureFlagUserLists(dummyApiVersion, projectId).then(({ data }) => {
+        return Api.fetchFeatureFlagUserLists(projectId).then(({ data }) => {
           expect(data).toEqual([]);
         });
       });
@@ -802,11 +802,9 @@ describe('Api', () => {
         };
         mock.onPost(expectedUrl, mockUserListData).replyOnce(200, mockUserList);
 
-        return Api.createFeatureFlagUserList(dummyApiVersion, projectId, mockUserListData).then(
-          ({ data }) => {
+        return Api.createFeatureFlagUserList(projectId, mockUserListData).then(({ data }) => {
           expect(data).toEqual(mockUserList);
-          },
-        );
+        });
       });
     });
 
@@ -814,7 +812,7 @@ describe('Api', () => {
       it('GETs the right url', () => {
         mock.onGet(`${expectedUrl}/1`).replyOnce(200, mockUserList);
 
-        return Api.fetchFeatureFlagUserList(dummyApiVersion, projectId, 1).then(({ data }) => {
+        return Api.fetchFeatureFlagUserList(projectId, 1).then(({ data }) => {
           expect(data).toEqual(mockUserList);
         });
       });
@@ -824,7 +822,7 @@ describe('Api', () => {
       it('PUTs the right url', () => {
         mock.onPut(`${expectedUrl}/1`).replyOnce(200, { ...mockUserList, user_xids: '5' });
 
-        return Api.updateFeatureFlagUserList(dummyApiVersion, projectId, {
+        return Api.updateFeatureFlagUserList(projectId, {
           ...mockUserList,
           user_xids: '5',
         }).then(({ data }) => {
@@ -837,7 +835,7 @@ describe('Api', () => {
       it('DELETEs the right url', () => {
         mock.onDelete(`${expectedUrl}/1`).replyOnce(200, 'deleted');
 
-        return Api.deleteFeatureFlagUserList(dummyApiVersion, projectId, 1).then(({ data }) => {
+        return Api.deleteFeatureFlagUserList(projectId, 1).then(({ data }) => {
           expect(data).toBe('deleted');
         });
       });

ee/spec/frontend/feature_flags/components/edit_feature_flag_spec.js

@@ -33,6 +33,7 @@ describe('Edit feature flag form', () => {
         endpoint: `${TEST_HOST}/feature_flags.json`,
         path: '/feature_flags',
         environmentsEndpoint: 'environments.json',
+        projectId: '8',
       },
       store,
       provide: {

ee/spec/frontend/feature_flags/components/form_spec.js

 import { uniqueId } from 'lodash';
 import { shallowMount } from '@vue/test-utils';
 import { GlFormTextarea, GlFormCheckbox, GlDeprecatedButton } from '@gitlab/ui';
+import Api from 'ee/api';
 import Form from 'ee/feature_flags/components/form.vue';
 import EnvironmentsDropdown from 'ee/feature_flags/components/environments_dropdown.vue';
 import Strategy from 'ee/feature_flags/components/strategy.vue';
@@ -13,7 +14,9 @@ import {
   NEW_VERSION_FLAG,
 } from 'ee/feature_flags/constants';
 import ToggleButton from '~/vue_shared/components/toggle_button.vue';
-import { featureFlag } from '../mock_data';
+import { featureFlag, userList } from '../mock_data';
+
+jest.mock('ee/api.js');
 
 describe('feature flag form', () => {
   let wrapper;
@@ -21,6 +24,7 @@ describe('feature flag form', () => {
     cancelPath: 'feature_flags',
     submitText: 'Create',
     environmentsEndpoint: '/environments.json',
+    projectId: '1',
   };
 
   const factory = (props = {}) => {
@@ -35,6 +39,10 @@ describe('feature flag form', () => {
     });
   };
 
+  beforeEach(() => {
+    Api.fetchFeatureFlagUserLists.mockResolvedValue({ data: [] });
+  });
+
   afterEach(() => {
     wrapper.destroy();
   });
@@ -388,6 +396,7 @@ describe('feature flag form', () => {
 
   describe('with strategies', () => {
     beforeEach(() => {
+      Api.fetchFeatureFlagUserLists.mockResolvedValue({ data: [userList] });
       factory({
         ...requiredProps,
         name: featureFlag.name,
@@ -409,6 +418,12 @@ describe('feature flag form', () => {
       });
     });
 
+    it('should request the user lists on mount', () => {
+      return wrapper.vm.$nextTick(() => {
+        expect(Api.fetchFeatureFlagUserLists).toHaveBeenCalledWith('1');
+      });
+    });
+
     it('should show the strategy component', () => {
       const strategy = wrapper.find(Strategy);
       expect(strategy.exists()).toBe(true);
@@ -440,5 +455,9 @@ describe('feature flag form', () => {
         expect(wrapper.find(Strategy).props('strategy')).not.toEqual(strategy);
       });
     });
+
+    it('should provide the user lists to the strategy', () => {
+      expect(wrapper.find(Strategy).props('userLists')).toEqual([userList]);
+    });
   });
 });

ee/spec/frontend/feature_flags/components/new_feature_flag_spec.js

@@ -25,6 +25,7 @@ describe('New feature flag form', () => {
         endpoint: 'feature_flags.json',
         path: '/feature_flags',
         environmentsEndpoint: 'environments.json',
+        projectId: '8',
       },
       store,
     });
@@ -72,4 +73,8 @@ describe('New feature flag form', () => {
   it('should alert users that feature flags are changing soon', () => {
     expect(wrapper.find(GlAlert).text()).toBe(NEW_FLAG_ALERT);
   });
+
+  it('should pass in the project ID', () => {
+    expect(wrapper.find(Form).props('projectId')).toBe('8');
+  });
 });

ee/spec/frontend/feature_flags/components/strategy_spec.js

@@ -5,13 +5,18 @@ import {
   ROLLOUT_STRATEGY_ALL_USERS,
   ROLLOUT_STRATEGY_PERCENT_ROLLOUT,
   ROLLOUT_STRATEGY_USER_ID,
+  ROLLOUT_STRATEGY_GITLAB_USER_LIST,
 } from 'ee/feature_flags/constants';
 import Strategy from 'ee/feature_flags/components/strategy.vue';
 import NewEnvironmentsDropdown from 'ee/feature_flags/components/new_environments_dropdown.vue';
 
+import { userList } from '../mock_data';
+
 describe('Feature flags strategy', () => {
   let wrapper;
 
+  const findStrategy = () => wrapper.find('[data-testid="strategy"]');
+
   const factory = (
     opts = {
       propsData: {
@@ -19,6 +24,7 @@ describe('Feature flags strategy', () => {
         index: 0,
         endpoint: '',
         canDelete: true,
+        userLists: [userList],
       },
     },
   ) => {
@@ -37,11 +43,11 @@ describe('Feature flags strategy', () => {
   });
 
   describe.each`
-    name                                | parameter       | value    | input
-    ${ROLLOUT_STRATEGY_ALL_USERS}       | ${null}         | ${null}  | ${null}
-    ${ROLLOUT_STRATEGY_PERCENT_ROLLOUT} | ${'percentage'} | ${'50'}  | ${GlFormInput}
-    ${ROLLOUT_STRATEGY_USER_ID}         | ${'userIds'}    | ${'1,2'} | ${GlFormTextarea}
-  `('with strategy $name', ({ name, parameter, value, input }) => {
+    name                                | parameter       | value    | newValue   | input
+    ${ROLLOUT_STRATEGY_ALL_USERS}       | ${null}         | ${null}  | ${null}    | ${null}
+    ${ROLLOUT_STRATEGY_PERCENT_ROLLOUT} | ${'percentage'} | ${'50'}  | ${'20'}    | ${GlFormInput}
+    ${ROLLOUT_STRATEGY_USER_ID}         | ${'userIds'}    | ${'1,2'} | ${'1,2,3'} | ${GlFormTextarea}
+  `('with strategy $name', ({ name, parameter, value, newValue, input }) => {
     let propsData;
     let strategy;
     beforeEach(() => {
@@ -57,27 +63,74 @@ describe('Feature flags strategy', () => {
     it('should set the select to match the strategy name', () => {
       expect(wrapper.find(GlFormSelect).attributes('value')).toBe(name);
     });
-    it('should not show inputs for other paramters', () => {
-      [GlFormTextarea, GlFormInput]
+
+    it('should not show inputs for other parameters', () => {
+      [GlFormTextarea, GlFormInput, GlFormSelect]
         .filter(component => component !== input)
-        .map(component => wrapper.findAll(component))
+        .map(component => findStrategy().findAll(component))
         .forEach(inputWrapper => expect(inputWrapper).toHaveLength(0));
     });
+
     if (parameter !== null) {
       it(`should show the input for ${parameter} with the correct value`, () => {
-        const inputWrapper = wrapper.find(input);
+        const inputWrapper = findStrategy().find(input);
         expect(inputWrapper.exists()).toBe(true);
         expect(inputWrapper.attributes('value')).toBe(value);
       });
+
       it(`should emit a change event when altering ${parameter}`, () => {
-        const inputWrapper = wrapper.find(input);
-        inputWrapper.vm.$emit('input', '');
+        const inputWrapper = findStrategy().find(input);
+        inputWrapper.vm.$emit('input', newValue);
         expect(wrapper.emitted('change')).toEqual([
-          [{ name, parameters: expect.objectContaining({ [parameter]: '' }), scopes: [] }],
+          [{ name, parameters: expect.objectContaining({ [parameter]: newValue }), scopes: [] }],
         ]);
       });
     }
   });
+  describe('with strategy gitlabUserList', () => {
+    let propsData;
+    let strategy;
+    beforeEach(() => {
+      strategy = { name: ROLLOUT_STRATEGY_GITLAB_USER_LIST, userListId: '2', parameters: {} };
+      propsData = { strategy, index: 0, endpoint: '', canDelete: true, userLists: [userList] };
+      factory({ propsData });
+    });
+
+    it('should set the select to match the strategy name', () => {
+      expect(wrapper.find(GlFormSelect).attributes('value')).toBe(
+        ROLLOUT_STRATEGY_GITLAB_USER_LIST,
+      );
+    });
+
+    it('should not show inputs for other parameters', () => {
+      expect(findStrategy().contains(GlFormTextarea)).toBe(false);
+      expect(findStrategy().contains(GlFormInput)).toBe(false);
+    });
+
+    it('should show the input for userListId with the correct value', () => {
+      const inputWrapper = findStrategy().find(GlFormSelect);
+      expect(inputWrapper.exists()).toBe(true);
+      expect(inputWrapper.attributes('value')).toBe('2');
+    });
+
+    it('should emit a change event when altering the userListId', () => {
+      const inputWrapper = findStrategy().find(GlFormSelect);
+      inputWrapper.vm.$emit('input', '3');
+      inputWrapper.vm.$emit('change', '3');
+      return wrapper.vm.$nextTick().then(() => {
+        expect(wrapper.emitted('change')).toEqual([
+          [
+            {
+              name: ROLLOUT_STRATEGY_GITLAB_USER_LIST,
+              userListId: '3',
+              scopes: [],
+              parameters: {},
+            },
+          ],
+        ]);
+      });
+    });
+  });
 
   describe('with a strategy', () => {
     describe('with scopes defined', () => {

ee/spec/frontend/feature_flags/mock_data.js

@@ -89,3 +89,13 @@ export const getRequestData = {
 };
 
 export const rotateData = { token: 'oP6sCNRqtRHmpy1gw2-F' };
+
+export const userList = {
+  name: 'test_users',
+  user_xids: 'user3,user4,user5',
+  id: 2,
+  iid: 2,
+  project_id: 1,
+  created_at: '2020-02-04T08:13:10.507Z',
+  updated_at: '2020-02-04T08:13:10.507Z',
+};

locale/gitlab.pot

@@ -9614,6 +9614,9 @@ msgstr ""
 msgid "FeatureFlags|There was an error fetching the feature flags."
 msgstr ""
 
+msgid "FeatureFlags|There was an error retrieving user lists"
+msgstr ""
+
 msgid "FeatureFlags|Try again in a few moments or contact your support team."
 msgstr ""
 
@@ -9623,9 +9626,18 @@ msgstr ""
 msgid "FeatureFlag|Delete strategy"
 msgstr ""
 
+msgid "FeatureFlag|List"
+msgstr ""
+
 msgid "FeatureFlag|Percentage"
 msgstr ""
 
+msgid "FeatureFlag|Select a user list"
+msgstr ""
+
+msgid "FeatureFlag|There are no configured user lists"
+msgstr ""
+
 msgid "FeatureFlag|Type"
 msgstr ""