Feat(Purchase Flow): migrate step components to use GraphQL

ee/app/assets/javascripts/subscriptions/buy_minutes/components/app.vue

 <script>
-import StepOrderApp from 'ee/vue_shared/components/step_order_app.vue';
+import StepOrderApp from 'ee/vue_shared/purchase_flow/components/step_order_app.vue';
 
 export default {
   components: {

ee/app/assets/javascripts/subscriptions/new/components/app.vue

 <script>
-import StepOrderApp from 'ee/vue_shared/components/step_order_app.vue';
+import StepOrderApp from 'ee/vue_shared/purchase_flow/components/step_order_app.vue';
 import Checkout from './checkout.vue';
 import OrderSummary from './order_summary.vue';
 

ee/app/assets/javascripts/subscriptions/new/components/checkout/billing_address.vue

@@ -2,9 +2,10 @@
 import { GlFormGroup, GlFormInput, GlFormSelect } from '@gitlab/ui';
 import { isEmpty } from 'lodash';
 import { mapState, mapActions } from 'vuex';
+import Step from 'ee/vue_shared/purchase_flow/components/step.vue';
 import { s__ } from '~/locale';
 import autofocusonshow from '~/vue_shared/directives/autofocusonshow';
-import Step from './step.vue';
+import { STEPS } from '../../constants';
 
 export default {
   components: {
@@ -128,11 +129,12 @@ export default {
     stateSelectPrompt: s__('Checkout|Please select a state'),
     zipCodeLabel: s__('Checkout|Zip code'),
   },
+  stepId: STEPS[1].id,
 };
 </script>
 <template>
   <step
-    step="billingAddress"
+    :step-id="$options.stepId"
     :title="$options.i18n.stepTitle"
     :is-valid="isValid"
     :next-step-button-text="$options.i18n.nextStepButtonText"

ee/app/assets/javascripts/subscriptions/new/components/checkout/confirm_order.vue

 <script>
 import { GlButton, GlLoadingIcon } from '@gitlab/ui';
-import { mapState, mapActions, mapGetters } from 'vuex';
+import { mapState, mapActions } from 'vuex';
+import activeStepQuery from 'ee/vue_shared/purchase_flow/graphql/queries/active_step.query.graphql';
 import { s__ } from '~/locale';
+import { STEPS } from '../../constants';
 
 export default {
   components: {
     GlButton,
     GlLoadingIcon,
   },
+  data() {
+    return {
+      isActive: {},
+    };
+  },
+  apollo: {
+    isActive: {
+      query: activeStepQuery,
+      update: ({ activeStep }) => activeStep.id === STEPS[3].id,
+    },
+  },
   computed: {
     ...mapState(['isConfirmingOrder']),
-    ...mapGetters(['currentStep']),
-    isActive() {
-      return this.currentStep === 'confirmOrder';
-    },
   },
   methods: {
     ...mapActions(['confirmOrder']),

ee/app/assets/javascripts/subscriptions/new/components/checkout/payment_method.vue

 <script>
 import { GlSprintf } from '@gitlab/ui';
 import { mapState } from 'vuex';
+import Step from 'ee/vue_shared/purchase_flow/components/step.vue';
 import { sprintf, s__ } from '~/locale';
-import Step from './step.vue';
+import { STEPS } from '../../constants';
 import Zuora from './zuora.vue';
 
 export default {
@@ -28,10 +29,11 @@ export default {
     creditCardDetails: s__('Checkout|%{cardType} ending in %{lastFourDigits}'),
     expirationDate: s__('Checkout|Exp %{expirationMonth}/%{expirationYear}'),
   },
+  stepId: STEPS[2].id,
 };
 </script>
 <template>
-  <step step="paymentMethod" :title="$options.i18n.stepTitle" :is-valid="isValid">
+  <step :step-id="$options.stepId" :title="$options.i18n.stepTitle" :is-valid="isValid">
     <template #body="props">
       <zuora :active="props.active" />
     </template>

ee/app/assets/javascripts/subscriptions/new/components/checkout/subscription_details.vue

@@ -2,10 +2,10 @@
 import { GlFormGroup, GlFormSelect, GlFormInput, GlSprintf, GlLink } from '@gitlab/ui';
 import { isEmpty } from 'lodash';
 import { mapState, mapGetters, mapActions } from 'vuex';
-import { NEW_GROUP } from 'ee/subscriptions/new/constants';
+import { NEW_GROUP, STEPS } from 'ee/subscriptions/new/constants';
+import Step from 'ee/vue_shared/purchase_flow/components/step.vue';
 import { sprintf, s__ } from '~/locale';
 import autofocusonshow from '~/vue_shared/directives/autofocusonshow';
-import Step from './step.vue';
 
 export default {
   components: {
@@ -133,11 +133,12 @@ export default {
     group: s__('Checkout|Group'),
     users: s__('Checkout|Users'),
   },
+  stepId: STEPS[0].id,
 };
 </script>
 <template>
   <step
-    step="subscriptionDetails"
+    :step-id="$options.stepId"
     :title="$options.i18n.stepTitle"
     :is-valid="isValid"
     :next-step-button-text="$options.i18n.nextStepButtonText"

ee/app/assets/javascripts/subscriptions/new/constants.js

 // The order of the steps in this array determines the flow of the application
-export const STEPS = ['subscriptionDetails', 'billingAddress', 'paymentMethod', 'confirmOrder'];
+/* eslint-disable @gitlab/require-i18n-strings */
+export const STEPS = [
+  { id: 'subscriptionDetails', __typename: 'Step' },
+  { id: 'billingAddress', __typename: 'Step' },
+  { id: 'paymentMethod', __typename: 'Step' },
+  { id: 'confirmOrder', __typename: 'Step' },
+];
+/* eslint-enable @gitlab/require-i18n-strings */
 
 export const ZUORA_SCRIPT_URL = 'https://static.zuora.com/Resources/libs/hosted/1.3.1/zuora-min.js';
 

ee/app/assets/javascripts/subscriptions/new/graphql.js

+import activeStepQuery from 'ee/vue_shared/purchase_flow/graphql/queries/active_step.query.graphql';
+import stepListQuery from 'ee/vue_shared/purchase_flow/graphql/queries/step_list.query.graphql';
+import resolvers from 'ee/vue_shared/purchase_flow/graphql/resolvers';
+import typeDefs from 'ee/vue_shared/purchase_flow/graphql/typedefs.graphql';
+import createDefaultClient from '~/lib/graphql';
+
+export default function createClient(stepList) {
+  const client = createDefaultClient(resolvers, {
+    typeDefs,
+    assumeImmutableResults: true,
+  });
+
+  client.cache.writeQuery({
+    query: stepListQuery,
+    data: {
+      stepList,
+    },
+  });
+
+  client.cache.writeQuery({
+    query: activeStepQuery,
+    data: {
+      activeStep: stepList[0],
+    },
+  });
+
+  return client;
+}

ee/app/assets/javascripts/subscriptions/new/index.js

 import Vue from 'vue';
+import VueApollo from 'vue-apollo';
 import App from './components/app.vue';
+import { STEPS } from './constants';
+import createClient from './graphql';
 import createStore from './store';
 
+Vue.use(VueApollo);
+
+const defaultClient = createClient(STEPS);
+const apolloProvider = new VueApollo({
+  defaultClient,
+});
+
 export default () => {
   const el = document.getElementById('js-new-subscription');
   const store = createStore(el.dataset);
@@ -9,6 +19,7 @@ export default () => {
   return new Vue({
     el,
     store,
+    apolloProvider,
     components: {
       App,
     },

ee/app/assets/javascripts/subscriptions/new/store/actions.js

 import Api from 'ee/api';
+import activateNextStepMutation from 'ee/vue_shared/purchase_flow/graphql/mutations/activate_next_step.mutation.graphql';
 import createFlash from '~/flash';
 import { redirectTo } from '~/lib/utils/url_utility';
 import { sprintf, s__ } from '~/locale';
-import { STEPS, PAYMENT_FORM_ID } from '../constants';
+import { PAYMENT_FORM_ID } from '../constants';
+import defaultClient from '../graphql';
 import * as types from './mutation_types';
 
-export const activateStep = ({ commit }, currentStep) => {
-  if (STEPS.includes(currentStep)) {
-    commit(types.UPDATE_CURRENT_STEP, currentStep);
-  }
-};
-
-export const activateNextStep = ({ commit, getters }) => {
-  const { currentStepIndex } = getters;
-
-  if (currentStepIndex < STEPS.length - 1) {
-    const nextStep = STEPS[currentStepIndex + 1];
-
-    commit(types.UPDATE_CURRENT_STEP, nextStep);
-  }
-};
-
 export const updateSelectedPlan = ({ commit }, selectedPlan) => {
   commit(types.UPDATE_SELECTED_PLAN, selectedPlan);
 };
@@ -180,10 +166,12 @@ export const fetchPaymentMethodDetails = ({ state, dispatch, commit }) =>
     .catch(() => dispatch('fetchPaymentMethodDetailsError'))
     .finally(() => commit(types.UPDATE_IS_LOADING_PAYMENT_METHOD, false));
 
-export const fetchPaymentMethodDetailsSuccess = ({ commit, dispatch }, creditCardDetails) => {
+export const fetchPaymentMethodDetailsSuccess = ({ commit }, creditCardDetails) => {
   commit(types.UPDATE_CREDIT_CARD_DETAILS, creditCardDetails);
 
-  dispatch('activateNextStep');
+  defaultClient.mutate({
+    mutation: activateNextStepMutation,
+  });
 };
 
 export const fetchPaymentMethodDetailsError = () => {

ee/app/assets/javascripts/subscriptions/new/store/getters.js

 import { s__ } from '~/locale';
-import { STEPS, NEW_GROUP } from '../constants';
-
-export const currentStep = (state) => state.currentStep;
-
-export const stepIndex = () => (step) => STEPS.findIndex((el) => el === step);
-
-export const currentStepIndex = (state, getters) => getters.stepIndex(state.currentStep);
+import { NEW_GROUP } from '../constants';
 
 export const selectedPlanText = (state, getters) => getters.selectedPlanDetails.text;
 

ee/app/assets/javascripts/subscriptions/new/store/mutation_types.js

-export const UPDATE_CURRENT_STEP = 'UPDATE_CURRENT_STEP';
-
 export const UPDATE_SELECTED_PLAN = 'UPDATE_SELECTED_PLAN';
 
 export const UPDATE_SELECTED_GROUP = 'UPDATE_SELECTED_GROUP';

ee/app/assets/javascripts/subscriptions/new/store/mutations.js

 import * as types from './mutation_types';
 
 export default {
-  [types.UPDATE_CURRENT_STEP](state, currentStep) {
-    state.currentStep = currentStep;
-  },
-
   [types.UPDATE_SELECTED_PLAN](state, selectedPlan) {
     state.selectedPlan = selectedPlan;
   },

ee/app/assets/javascripts/subscriptions/new/store/state.js

 import { parseBoolean } from '~/lib/utils/common_utils';
 import { capitalizeFirstCharacter } from '~/lib/utils/text_utility';
-import { STEPS, TAX_RATE } from '../constants';
+import { TAX_RATE } from '../constants';
 
 const parsePlanData = (planData) =>
   JSON.parse(planData).map((plan) => ({
@@ -52,7 +52,6 @@ export default ({
   const groups = parseGroupData(groupData);
 
   return {
-    currentStep: STEPS[0],
     isSetupForCompany: parseBoolean(setupForCompany) || !isNewUser,
     availablePlans,
     selectedPlan: determineSelectedPlan(planId, availablePlans),

ee/app/assets/javascripts/subscriptions/new/components/checkout/step.vue → ee/app/assets/javascripts/vue_shared/purchase_flow/components/step.vue

 <script>
 import { GlFormGroup, GlButton } from '@gitlab/ui';
-import { mapActions, mapGetters } from 'vuex';
+import activateNextStepMutation from 'ee/vue_shared/purchase_flow/graphql/mutations/activate_next_step.mutation.graphql';
+import updateStepMutation from 'ee/vue_shared/purchase_flow/graphql/mutations/update_active_step.mutation.graphql';
+import activeStepQuery from 'ee/vue_shared/purchase_flow/graphql/queries/active_step.query.graphql';
+import stepListQuery from 'ee/vue_shared/purchase_flow/graphql/queries/step_list.query.graphql';
 import { convertToSnakeCase, dasherize } from '~/lib/utils/text_utility';
 import StepHeader from './step_header.vue';
 import StepSummary from './step_summary.vue';
@@ -13,7 +16,7 @@ export default {
     StepSummary,
   },
   props: {
-    step: {
+    stepId: {
       type: String,
       required: true,
     },
@@ -31,30 +34,61 @@ export default {
       default: '',
     },
   },
+  data() {
+    return {
+      activeStep: {},
+      stepList: [],
+      loading: false,
+    };
+  },
+  apollo: {
+    activeStep: {
+      query: activeStepQuery,
+    },
+    stepList: {
+      query: stepListQuery,
+    },
+  },
   computed: {
     isActive() {
-      return this.currentStep === this.step;
+      return this.activeStep.id === this.stepId;
     },
     isFinished() {
       return this.isValid && !this.isActive;
     },
     isEditable() {
-      return this.isFinished && this.stepIndex(this.step) < this.currentStepIndex;
+      const index = this.stepList.findIndex(({ id }) => id === this.stepId);
+      const activeIndex = this.stepList.findIndex(({ id }) => id === this.activeStep.id);
+      return this.isFinished && index < activeIndex;
     },
     snakeCasedStep() {
-      return dasherize(convertToSnakeCase(this.step));
+      return dasherize(convertToSnakeCase(this.stepId));
     },
-    ...mapGetters(['currentStep', 'stepIndex', 'currentStepIndex']),
   },
   methods: {
-    ...mapActions(['activateStep', 'activateNextStep']),
-    nextStep() {
-      if (this.isValid) {
-        this.activateNextStep();
+    async nextStep() {
+      if (!this.isValid) {
+        return;
       }
+      this.loading = true;
+      await this.$apollo
+        .mutate({
+          mutation: activateNextStepMutation,
+        })
+        .finally(() => {
+          this.loading = false;
+        });
     },
-    edit() {
-      this.activateStep(this.step);
+    async edit() {
+      this.loading = true;
+      await this.$apollo
+        .mutate({
+          mutation: updateStepMutation,
+          variables: { id: this.stepId },
+        })
+        .finally(() => {
+          this.loading = false;
+        });
     },
   },
 };

ee/spec/frontend/subscriptions/buy_minutes/index_spec.js

@@ -4,7 +4,7 @@ import { createWrapper } from '@vue/test-utils';
 
 import initBuyMinutesApp from 'ee/subscriptions/buy_minutes';
 import * as utils from 'ee/subscriptions/buy_minutes/utils';
-import StepOrderApp from 'ee/vue_shared/components/step_order_app.vue';
+import StepOrderApp from 'ee/vue_shared/purchase_flow/components/step_order_app.vue';
 import { mockCiMinutesPlans, mockParsedCiMinutesPlans } from './mock_data';
 
 jest.mock('ee/subscriptions/buy_minutes/utils');

ee/spec/frontend/subscriptions/new/components/checkout/billing_address_spec.js

-import { mount } from '@vue/test-utils';
-import Vue, { nextTick } from 'vue';
+import { mount, createLocalVue } from '@vue/test-utils';
+import { nextTick } from 'vue';
+import VueApollo from 'vue-apollo';
 import Vuex from 'vuex';
-import Component from 'ee/subscriptions/new/components/checkout/billing_address.vue';
-import Step from 'ee/subscriptions/new/components/checkout/step.vue';
+import BillingAddress from 'ee/subscriptions/new/components/checkout/billing_address.vue';
+import { STEPS } from 'ee/subscriptions/new/constants';
 import { getStoreConfig } from 'ee/subscriptions/new/store';
 import * as types from 'ee/subscriptions/new/store/mutation_types';
+import Step from 'ee/vue_shared/purchase_flow/components/step.vue';
+import activateNextStepMutation from 'ee/vue_shared/purchase_flow/graphql/mutations/activate_next_step.mutation.graphql';
+import { createMockApolloProvider } from 'ee_jest/vue_shared/purchase_flow/spec_helper';
 
-Vue.use(Vuex);
+const localVue = createLocalVue();
+localVue.use(Vuex);
+localVue.use(VueApollo);
 
 describe('Billing Address', () => {
   let store;
   let wrapper;
+  let mockApolloProvider;
 
   const actionMocks = {
     fetchCountries: jest.fn(),
     fetchStates: jest.fn(),
   };
 
-  const createComponent = () => {
+  function activateNextStep() {
+    return mockApolloProvider.clients.defaultClient.mutate({
+      mutation: activateNextStepMutation,
+    });
+  }
+
+  function createStore() {
     const { actions, ...storeConfig } = getStoreConfig();
-    store = new Vuex.Store({
+    return new Vuex.Store({
       ...storeConfig,
       actions: { ...actions, ...actionMocks },
     });
+  }
 
-    wrapper = mount(Component, {
-      store,
+  function createComponent(options = {}) {
+    return mount(BillingAddress, {
+      localVue,
+      ...options,
     });
-  };
+  }
 
   beforeEach(() => {
-    createComponent();
+    store = createStore();
+    mockApolloProvider = createMockApolloProvider(STEPS);
+    wrapper = createComponent({ store, apolloProvider: mockApolloProvider });
   });
 
   afterEach(() => {
@@ -110,14 +128,15 @@ describe('Billing Address', () => {
   });
 
   describe('showing the summary', () => {
-    beforeEach(() => {
+    beforeEach(async () => {
       store.commit(types.UPDATE_COUNTRY, 'country');
       store.commit(types.UPDATE_STREET_ADDRESS_LINE_ONE, 'address line 1');
       store.commit(types.UPDATE_STREET_ADDRESS_LINE_TWO, 'address line 2');
       store.commit(types.UPDATE_COUNTRY_STATE, 'state');
       store.commit(types.UPDATE_CITY, 'city');
       store.commit(types.UPDATE_ZIP_CODE, 'zip');
-      store.commit(types.UPDATE_CURRENT_STEP, 'nextStep');
+      await activateNextStep();
+      await activateNextStep();
     });
 
     it('should show the entered address line 1', () => {

ee/spec/frontend/subscriptions/new/components/checkout/confirm_order_spec.js

 import { GlButton, GlLoadingIcon } from '@gitlab/ui';
 import { shallowMount, createLocalVue } from '@vue/test-utils';
+import VueApollo from 'vue-apollo';
 import Vuex from 'vuex';
 import Api from 'ee/api';
-import Component from 'ee/subscriptions/new/components/checkout/confirm_order.vue';
+import ConfirmOrder from 'ee/subscriptions/new/components/checkout/confirm_order.vue';
+import { STEPS } from 'ee/subscriptions/new/constants';
 import createStore from 'ee/subscriptions/new/store';
-import * as types from 'ee/subscriptions/new/store/mutation_types';
+import updateStepMutation from 'ee/vue_shared/purchase_flow/graphql/mutations/update_active_step.mutation.graphql';
+import { createMockApolloProvider } from 'ee_jest/vue_shared/purchase_flow/spec_helper';
 
 describe('Confirm Order', () => {
   const localVue = createLocalVue();
   localVue.use(Vuex);
+  localVue.use(VueApollo);
 
   let wrapper;
+  let mockApolloProvider;
 
   jest.mock('ee/api.js');
 
   const store = createStore();
 
-  const createComponent = (opts = {}) => {
-    wrapper = shallowMount(Component, {
+  function activateStep(stepId) {
+    return mockApolloProvider.clients.defaultClient.mutate({
+      mutation: updateStepMutation,
+      variables: { id: stepId },
+    });
+  }
+
+  function createComponent(options = {}) {
+    return shallowMount(ConfirmOrder, {
       localVue,
       store,
-      ...opts,
+      ...options,
     });
-  };
+  }
 
   const findConfirmButton = () => wrapper.find(GlButton);
   const findLoadingIcon = () => wrapper.find(GlLoadingIcon);
 
   beforeEach(() => {
-    createComponent();
+    mockApolloProvider = createMockApolloProvider(STEPS);
+    wrapper = createComponent({ apolloProvider: mockApolloProvider });
   });
 
   afterEach(() => {
@@ -36,8 +49,8 @@ describe('Confirm Order', () => {
   });
 
   describe('Active', () => {
-    beforeEach(() => {
-      store.commit(types.UPDATE_CURRENT_STEP, 'confirmOrder');
+    beforeEach(async () => {
+      await activateStep(STEPS[3].id);
     });
 
     it('button should be visible', () => {
@@ -74,8 +87,8 @@ describe('Confirm Order', () => {
   });
 
   describe('Inactive', () => {
-    beforeEach(() => {
-      store.commit(types.UPDATE_CURRENT_STEP, 'otherStep');
+    beforeEach(async () => {
+      await activateStep(STEPS[1].id);
     });
 
     it('button should not be visible', () => {

ee/spec/frontend/subscriptions/new/components/checkout/payment_method_spec.js

 import { mount, createLocalVue } from '@vue/test-utils';
+import VueApollo from 'vue-apollo';
 import Vuex from 'vuex';
-import Component from 'ee/subscriptions/new/components/checkout/payment_method.vue';
-import Step from 'ee/subscriptions/new/components/checkout/step.vue';
+import PaymentMethod from 'ee/subscriptions/new/components/checkout/payment_method.vue';
+import { STEPS } from 'ee/subscriptions/new/constants';
 import createStore from 'ee/subscriptions/new/store';
 import * as types from 'ee/subscriptions/new/store/mutation_types';
+import Step from 'ee/vue_shared/purchase_flow/components/step.vue';
+import { createMockApolloProvider } from 'ee_jest/vue_shared/purchase_flow/spec_helper';
 
 describe('Payment Method', () => {
   const localVue = createLocalVue();
   localVue.use(Vuex);
+  localVue.use(VueApollo);
 
   let store;
   let wrapper;
 
-  const createComponent = (opts = {}) => {
-    wrapper = mount(Component, {
+  function createComponent(options = {}) {
+    return mount(PaymentMethod, {
       localVue,
       store,
-      ...opts,
+      ...options,
     });
-  };
+  }
 
   beforeEach(() => {
     store = createStore();
@@ -31,7 +35,8 @@ describe('Payment Method', () => {
       credit_card_expiration_year: 2009,
     });
 
-    createComponent();
+    const mockApollo = createMockApolloProvider(STEPS);
+    wrapper = createComponent({ apolloProvider: mockApollo });
   });
 
   afterEach(() => {

ee/spec/frontend/subscriptions/new/components/checkout/subscription_details_spec.js

 import { mount, createLocalVue } from '@vue/test-utils';
+import VueApollo from 'vue-apollo';
 import Vuex from 'vuex';
-import Step from 'ee/subscriptions/new/components/checkout/step.vue';
 import Component from 'ee/subscriptions/new/components/checkout/subscription_details.vue';
-import { NEW_GROUP } from 'ee/subscriptions/new/constants';
+import { NEW_GROUP, STEPS } from 'ee/subscriptions/new/constants';
 import createStore from 'ee/subscriptions/new/store';
 import * as types from 'ee/subscriptions/new/store/mutation_types';
+import Step from 'ee/vue_shared/purchase_flow/components/step.vue';
+import { createMockApolloProvider } from 'ee_jest/vue_shared/purchase_flow/spec_helper';
+
+const availablePlans = [
+  { id: 'firstPlanId', code: 'bronze', price_per_year: 48, name: 'bronze' },
+  { id: 'secondPlanId', code: 'silver', price_per_year: 228, name: 'silver' },
+];
+
+const groupData = [
+  { id: 132, name: 'My first group', users: 3 },
+  { id: 483, name: 'My second group', users: 12 },
+];
+
+const defaultInitialStoreData = {
+  availablePlans: JSON.stringify(availablePlans),
+  groupData: JSON.stringify(groupData),
+  planId: 'secondPlanId',
+  namespaceId: null,
+  setupForCompany: 'true',
+  fullName: 'Full Name',
+};
 
 describe('Subscription Details', () => {
   const localVue = createLocalVue();
   localVue.use(Vuex);
+  localVue.use(VueApollo);
 
-  let store;
   let wrapper;
 
-  const availablePlans = [
-    { id: 'firstPlanId', code: 'bronze', price_per_year: 48, name: 'bronze' },
-    { id: 'secondPlanId', code: 'silver', price_per_year: 228, name: 'silver' },
-  ];
-
-  const groupData = [
-    { id: 132, name: 'My first group', users: 3 },
-    { id: 483, name: 'My second group', users: 12 },
-  ];
-
-  let initialNamespaceId = null;
-  const initialData = (namespaceId) => {
-    return {
-      availablePlans: JSON.stringify(availablePlans),
-      groupData: JSON.stringify(groupData),
-      planId: 'secondPlanId',
-      namespaceId,
-      setupForCompany: 'true',
-      fullName: 'Full Name',
-    };
-  };
-
-  const createComponent = () => {
-    wrapper = mount(Component, {
+  function createComponent(options = {}) {
+    const { apolloProvider, store } = options;
+    return mount(Component, {
       localVue,
       store,
+      apolloProvider,
+      stubs: {
+        Step,
+      },
     });
-  };
+  }
 
   const organizationNameInput = () => wrapper.find({ ref: 'organization-name' });
   const groupSelect = () => wrapper.find({ ref: 'group-select' });
   const numberOfUsersInput = () => wrapper.find({ ref: 'number-of-users' });
   const companyLink = () => wrapper.find({ ref: 'company-link' });
 
-  beforeEach(() => {
-    store = createStore(initialData(initialNamespaceId));
-    createComponent();
-  });
-
   afterEach(() => {
     wrapper.destroy();
   });
 
   describe('A new user setting up for personal use', () => {
     beforeEach(() => {
+      const mockApollo = createMockApolloProvider(STEPS);
+      const store = createStore(defaultInitialStoreData);
       store.state.isNewUser = true;
       store.state.isSetupForCompany = false;
+      wrapper = createComponent({ apolloProvider: mockApollo, store });
     });
 
     it('should not display an input field for the company or group name', () => {
@@ -85,8 +87,11 @@ describe('Subscription Details', () => {
 
   describe('A new user setting up for a company or group', () => {
     beforeEach(() => {
+      const mockApollo = createMockApolloProvider(STEPS);
+      const store = createStore(defaultInitialStoreData);
       store.state.isNewUser = true;
       store.state.groupData = [];
+      wrapper = createComponent({ apolloProvider: mockApollo, store });
     });
 
     it('should display an input field for the company or group name', () => {
@@ -112,8 +117,11 @@ describe('Subscription Details', () => {
 
   describe('An existing user without any groups', () => {
     beforeEach(() => {
+      const mockApollo = createMockApolloProvider(STEPS);
+      const store = createStore(defaultInitialStoreData);
       store.state.isNewUser = false;
       store.state.groupData = [];
+      wrapper = createComponent({ apolloProvider: mockApollo, store });
     });
 
     it('should display an input field for the company or group name', () => {
@@ -138,8 +146,13 @@ describe('Subscription Details', () => {
   });
 
   describe('An existing user with groups', () => {
+    let store;
+
     beforeEach(() => {
+      const mockApollo = createMockApolloProvider(STEPS);
+      store = createStore(defaultInitialStoreData);
       store.state.isNewUser = false;
+      wrapper = createComponent({ apolloProvider: mockApollo, store });
     });
 
     it('should not display an input field for the company or group name', () => {
@@ -196,9 +209,13 @@ describe('Subscription Details', () => {
   });
 
   describe('An existing user coming from group billing page', () => {
+    let store;
+
     beforeEach(() => {
-      initialNamespaceId = '132';
+      const mockApollo = createMockApolloProvider(STEPS);
+      store = createStore({ ...defaultInitialStoreData, namespaceId: '132' });
       store.state.isNewUser = false;
+      wrapper = createComponent({ apolloProvider: mockApollo, store });
     });
 
     it('should not display an input field for the company or group name', () => {
@@ -246,6 +263,13 @@ describe('Subscription Details', () => {
 
   describe('validations', () => {
     const isStepValid = () => wrapper.find(Step).props('isValid');
+    let store;
+
+    beforeEach(() => {
+      const mockApollo = createMockApolloProvider(STEPS);
+      store = createStore(defaultInitialStoreData);
+      wrapper = createComponent({ apolloProvider: mockApollo, store });
+    });
 
     describe('when setting up for a company', () => {
       beforeEach(() => {
@@ -331,12 +355,16 @@ describe('Subscription Details', () => {
   });
 
   describe('Showing summary', () => {
+    let store;
+
     beforeEach(() => {
+      const mockApollo = createMockApolloProvider(STEPS, 1);
+      store = createStore(defaultInitialStoreData);
       store.commit(types.UPDATE_IS_SETUP_FOR_COMPANY, true);
       store.commit(types.UPDATE_SELECTED_PLAN, 'firstPlanId');
       store.commit(types.UPDATE_ORGANIZATION_NAME, 'My Organization');
       store.commit(types.UPDATE_NUMBER_OF_USERS, 25);
-      store.commit(types.UPDATE_CURRENT_STEP, 'nextStep');
+      wrapper = createComponent({ apolloProvider: mockApollo, store });
     });
 
     it('should show the selected plan', () => {

ee/spec/frontend/subscriptions/new/store/actions_spec.js

 import MockAdapter from 'axios-mock-adapter';
 import Api from 'ee/api';
 import * as constants from 'ee/subscriptions/new/constants';
+import defaultClient from 'ee/subscriptions/new/graphql';
 import * as actions from 'ee/subscriptions/new/store/actions';
+import activateNextStepMutation from 'ee/vue_shared/purchase_flow/graphql/mutations/activate_next_step.mutation.graphql';
 import { useMockLocationHelper } from 'helpers/mock_window_location_helper';
 import testAction from 'helpers/vuex_action_helper';
 import createFlash from '~/flash';
@@ -16,53 +18,18 @@ const {
 } = Api;
 
 jest.mock('~/flash');
-jest.mock('ee/subscriptions/new/constants', () => ({
-  STEPS: ['firstStep', 'secondStep'],
-}));
 
 describe('Subscriptions Actions', () => {
   let mock;
 
   beforeEach(() => {
     mock = new MockAdapter(axios);
+    defaultClient.mutate = jest.fn();
   });
 
   afterEach(() => {
     mock.restore();
-  });
-
-  describe('activateStep', () => {
-    it('set the currentStep to the provided value', (done) => {
-      testAction(
-        actions.activateStep,
-        'secondStep',
-        {},
-        [{ type: 'UPDATE_CURRENT_STEP', payload: 'secondStep' }],
-        [],
-        done,
-      );
-    });
-
-    it('does not change the currentStep if provided value is not available', (done) => {
-      testAction(actions.activateStep, 'thirdStep', {}, [], [], done);
-    });
-  });
-
-  describe('activateNextStep', () => {
-    it('set the currentStep to the next step in the available steps', (done) => {
-      testAction(
-        actions.activateNextStep,
-        {},
-        { currentStepIndex: 0 },
-        [{ type: 'UPDATE_CURRENT_STEP', payload: 'secondStep' }],
-        [],
-        done,
-      );
-    });
-
-    it('does not change the currentStep if the current step is the last step', (done) => {
-      testAction(actions.activateNextStep, {}, { currentStepIndex: 1 }, [], [], done);
-    });
+    defaultClient.mutate.mockClear();
   });
 
   describe('updateSelectedPlan', () => {
@@ -553,7 +520,7 @@ describe('Subscriptions Actions', () => {
   });
 
   describe('fetchPaymentMethodDetailsSuccess', () => {
-    it('updates creditCardDetails to the provided data and calls activateNextStep', (done) => {
+    it('updates creditCardDetails to the provided data and calls defaultClient with activateNextStepMutation', (done) => {
       testAction(
         actions.fetchPaymentMethodDetailsSuccess,
         {
@@ -574,8 +541,13 @@ describe('Subscriptions Actions', () => {
             },
           },
         ],
-        [{ type: 'activateNextStep' }],
-        done,
+        [],
+        () => {
+          expect(defaultClient.mutate).toHaveBeenCalledWith({
+            mutation: activateNextStepMutation,
+          });
+          done();
+        },
       );
     });
   });

ee/spec/frontend/subscriptions/new/store/getters_spec.js

 import * as constants from 'ee/subscriptions/new/constants';
 import * as getters from 'ee/subscriptions/new/store/getters';
 
-constants.STEPS = ['firstStep', 'secondStep'];
-
 const state = {
-  currentStep: 'secondStep',
   isSetupForCompany: true,
   isNewUser: true,
   availablePlans: [
@@ -26,35 +23,6 @@ const state = {
 };
 
 describe('Subscriptions Getters', () => {
-  describe('currentStep', () => {
-    it('returns the states currentStep', () => {
-      expect(getters.currentStep(state)).toBe('secondStep');
-    });
-  });
-
-  describe('stepIndex', () => {
-    it('returns a function', () => {
-      expect(getters.stepIndex()).toBeInstanceOf(Function);
-    });
-
-    it('returns a function that returns the index of the given step', () => {
-      expect(getters.stepIndex()('secondStep')).toBe(1);
-    });
-  });
-
-  describe('currentStepIndex', () => {
-    it('returns a function', () => {
-      expect(getters.currentStepIndex(state, getters)).toBeInstanceOf(Function);
-    });
-
-    it('calls the stepIndex function with the current step name', () => {
-      const stepIndexSpy = jest.spyOn(getters, 'stepIndex');
-      getters.currentStepIndex(state, getters);
-
-      expect(stepIndexSpy).toHaveBeenCalledWith('secondStep');
-    });
-  });
-
   describe('selectedPlanText', () => {
     it('returns the text for selectedPlan', () => {
       expect(

ee/spec/frontend/subscriptions/new/store/mutations_spec.js

@@ -2,7 +2,6 @@ import * as types from 'ee/subscriptions/new/store/mutation_types';
 import mutations from 'ee/subscriptions/new/store/mutations';
 
 const state = () => ({
-  currentStep: 'firstStep',
   selectedPlan: 'firstPlan',
   isSetupForCompany: true,
   numberOfUsers: 1,
@@ -22,7 +21,6 @@ beforeEach(() => {
 describe('ee/subscriptions/new/store/mutation', () => {
   describe.each`
     mutation                                  | value                                 | stateProp
-    ${types.UPDATE_CURRENT_STEP}              | ${'secondStep'}                       | ${'currentStep'}
     ${types.UPDATE_SELECTED_PLAN}             | ${'secondPlan'}                       | ${'selectedPlan'}
     ${types.UPDATE_SELECTED_GROUP}            | ${'selectedGroup'}                    | ${'selectedGroup'}
     ${types.UPDATE_IS_SETUP_FOR_COMPANY}      | ${false}                              | ${'isSetupForCompany'}

ee/spec/frontend/subscriptions/new/store/state_spec.js

 import * as constants from 'ee/subscriptions/new/constants';
 import createState from 'ee/subscriptions/new/store/state';
 
-constants.STEPS = ['firstStep', 'secondStep'];
 constants.TAX_RATE = 0;
 
 describe('projectsSelector default state', () => {
@@ -31,10 +30,6 @@ describe('projectsSelector default state', () => {
 
   const state = createState(initialData);
 
-  it('sets the currentStep to the first item of the STEPS constant', () => {
-    expect(state.currentStep).toEqual('firstStep');
-  });
-
   describe('availablePlans', () => {
     it('sets the availablePlans to the provided parsed availablePlans', () => {
       expect(state.availablePlans).toEqual([

ee/spec/frontend/subscriptions/new/components/checkout/step_spec.js → ee/spec/frontend/vue_shared/purchase_flow/components/step_spec.js

 import { GlButton } from '@gitlab/ui';
 import { shallowMount, createLocalVue } from '@vue/test-utils';
-import Vuex from 'vuex';
-import Component from 'ee/subscriptions/new/components/checkout/step.vue';
-import StepSummary from 'ee/subscriptions/new/components/checkout/step_summary.vue';
-import * as constants from 'ee/subscriptions/new/constants';
-import createStore from 'ee/subscriptions/new/store';
+import VueApollo from 'vue-apollo';
+import Step from 'ee/vue_shared/purchase_flow/components/step.vue';
+import StepSummary from 'ee/vue_shared/purchase_flow/components/step_summary.vue';
+import updateStepMutation from 'ee/vue_shared/purchase_flow/graphql/mutations/update_active_step.mutation.graphql';
+import { STEPS } from '../mock_data';
+import { createMockApolloProvider } from '../spec_helper';
 
-describe('Step', () => {
-  const localVue = createLocalVue();
-  localVue.use(Vuex);
+const localVue = createLocalVue();
+localVue.use(VueApollo);
 
-  let store;
+describe('Step', () => {
   let wrapper;
 
   const initialProps = {
-    step: 'secondStep',
+    stepId: STEPS[1].id,
     isValid: true,
     title: 'title',
     nextStepButtonText: 'next',
   };
 
-  const createComponent = (propsData) => {
-    wrapper = shallowMount(Component, {
-      propsData: { ...initialProps, ...propsData },
+  function activateFirstStep(apolloProvider) {
+    return apolloProvider.clients.defaultClient.mutate({
+      mutation: updateStepMutation,
+      variables: { id: STEPS[0].id },
+    });
+  }
+  function createComponent(options = {}) {
+    const { apolloProvider, propsData } = options;
+    return shallowMount(Step, {
       localVue,
-      store,
+      propsData: { ...initialProps, ...propsData },
+      apolloProvider,
     });
-  };
-
-  const activatePreviousStep = () => {
-    store.dispatch('activateStep', 'firstStep');
-  };
-
-  constants.STEPS = ['firstStep', 'secondStep'];
-
-  beforeEach(() => {
-    store = createStore();
-    store.dispatch('activateStep', 'secondStep');
-  });
+  }
 
   afterEach(() => {
     wrapper.destroy();
@@ -45,42 +41,47 @@ describe('Step', () => {
 
   describe('Step Body', () => {
     it('should display the step body when this step is the current step', () => {
-      createComponent();
+      const mockApollo = createMockApolloProvider(STEPS, 1);
+      wrapper = createComponent({ apolloProvider: mockApollo });
 
       expect(wrapper.find('.card > div').attributes('style')).toBeUndefined();
     });
 
-    it('should not display the step body when this step is not the current step', () => {
-      activatePreviousStep();
-      createComponent();
+    it('should not display the step body when this step is not the current step', async () => {
+      const mockApollo = createMockApolloProvider(STEPS, 1);
+      await activateFirstStep(mockApollo);
+      wrapper = createComponent({ apolloProvider: mockApollo });
 
       expect(wrapper.find('.card > div').attributes('style')).toBe('display: none;');
     });
   });
 
   describe('Step Summary', () => {
-    it('should be shown when this step is valid and not active', () => {
-      activatePreviousStep();
-      createComponent();
-
+    it('should be shown when this step is valid and not active', async () => {
+      const mockApollo = createMockApolloProvider(STEPS, 1);
+      await activateFirstStep(mockApollo);
+      wrapper = createComponent({ apolloProvider: mockApollo });
       expect(wrapper.find(StepSummary).exists()).toBe(true);
     });
 
-    it('should not be shown when this step is not valid and not active', () => {
-      activatePreviousStep();
-      createComponent({ isValid: false });
+    it('should not be shown when this step is not valid and not active', async () => {
+      const mockApollo = createMockApolloProvider(STEPS, 1);
+      await activateFirstStep(mockApollo);
+      wrapper = createComponent({ propsData: { isValid: false }, apolloProvider: mockApollo });
 
       expect(wrapper.find(StepSummary).exists()).toBe(false);
     });
 
     it('should not be shown when this step is valid and active', () => {
-      createComponent();
+      const mockApollo = createMockApolloProvider(STEPS, 1);
+      wrapper = createComponent({ apolloProvider: mockApollo });
 
       expect(wrapper.find(StepSummary).exists()).toBe(false);
     });
 
     it('should not be shown when this step is not valid and active', () => {
-      createComponent({ isValid: false });
+      const mockApollo = createMockApolloProvider(STEPS, 1);
+      wrapper = createComponent({ propsData: { isValid: false }, apolloProvider: mockApollo });
 
       expect(wrapper.find(StepSummary).exists()).toBe(false);
     });
@@ -88,22 +89,25 @@ describe('Step', () => {
 
   describe('isEditable', () => {
     it('should set the isEditable property to true when this step is finished and comes before the current step', () => {
-      createComponent({ step: 'firstStep' });
+      const mockApollo = createMockApolloProvider(STEPS, 1);
+      wrapper = createComponent({ propsData: { stepId: STEPS[0].id }, apolloProvider: mockApollo });
 
       expect(wrapper.find(StepSummary).props('isEditable')).toBe(true);
     });
   });
 
   describe('Showing the summary', () => {
-    it('shows the summary when this step is finished', () => {
-      activatePreviousStep();
-      createComponent();
+    it('shows the summary when this step is finished', async () => {
+      const mockApollo = createMockApolloProvider(STEPS, 1);
+      await activateFirstStep(mockApollo);
+      wrapper = createComponent({ apolloProvider: mockApollo });
 
       expect(wrapper.find(StepSummary).exists()).toBe(true);
     });
 
     it('does not show the summary when this step is not finished', () => {
-      createComponent();
+      const mockApollo = createMockApolloProvider(STEPS, 1);
+      wrapper = createComponent({ apolloProvider: mockApollo });
 
       expect(wrapper.find(StepSummary).exists()).toBe(false);
     });
@@ -111,25 +115,32 @@ describe('Step', () => {
 
   describe('Next button', () => {
     it('shows the next button when the text was passed', () => {
-      createComponent();
+      const mockApollo = createMockApolloProvider(STEPS, 1);
+      wrapper = createComponent({ apolloProvider: mockApollo });
 
       expect(wrapper.text()).toBe('next');
     });
 
     it('does not show the next button when no text was passed', () => {
-      createComponent({ nextStepButtonText: '' });
+      const mockApollo = createMockApolloProvider(STEPS, 1);
+      wrapper = createComponent({
+        propsData: { nextStepButtonText: '' },
+        apolloProvider: mockApollo,
+      });
 
       expect(wrapper.text()).toBe('');
     });
 
     it('is disabled when this step is not valid', () => {
-      createComponent({ isValid: false });
+      const mockApollo = createMockApolloProvider(STEPS, 1);
+      wrapper = createComponent({ propsData: { isValid: false }, apolloProvider: mockApollo });
 
       expect(wrapper.find(GlButton).attributes('disabled')).toBe('true');
     });
 
     it('is enabled when this step is valid', () => {
-      createComponent();
+      const mockApollo = createMockApolloProvider(STEPS, 1);
+      wrapper = createComponent({ apolloProvider: mockApollo });
 
       expect(wrapper.find(GlButton).attributes('disabled')).toBeUndefined();
     });

ee/spec/frontend/vue_shared/purchase_flow/spec_helper.js

+import activeStepQuery from 'ee/vue_shared/purchase_flow/graphql/queries/active_step.query.graphql';
+import stepListQuery from 'ee/vue_shared/purchase_flow/graphql/queries/step_list.query.graphql';
+import resolvers from 'ee/vue_shared/purchase_flow/graphql/resolvers';
+import createMockApollo from 'helpers/mock_apollo_helper';
+
+export function createMockApolloProvider(stepList, initialStepIndex = 0) {
+  const mockApollo = createMockApollo([], resolvers);
+  mockApollo.clients.defaultClient.cache.writeQuery({
+    query: stepListQuery,
+    data: { stepList },
+  });
+  mockApollo.clients.defaultClient.cache.writeQuery({
+    query: activeStepQuery,
+    data: { activeStep: stepList[initialStepIndex] },
+  });
+
+  return mockApollo;
+}