Move Vue toast init code

Also change the test code to emit
a click instead of accesing the component
internals

ee/app/assets/javascripts/pages/admin/users/pipeline_minutes/index.js

 import Vue from 'vue';
+import { GlToast } from '@gitlab/ui';
 import ResetButton from './reset_button.vue';
 
+Vue.use(GlToast);
+
 export function pipelineMinutes() {
   const el = document.getElementById('pipeline-minutes-vue');
 

ee/app/assets/javascripts/pages/admin/users/pipeline_minutes/reset_button.vue

 <script>
-import Vue from 'vue';
-import { GlButton, GlToast } from '@gitlab/ui';
+import { GlButton } from '@gitlab/ui';
 import { __ } from '~/locale';
 import axios from '~/lib/utils/axios_utils';
 import statusCodes from '~/lib/utils/http_status';
 
-Vue.use(GlToast);
-
 export default {
   components: {
     GlButton,
@@ -19,7 +16,7 @@ export default {
   },
   methods: {
     resetPipelineMinutes() {
-      return axios
+      axios
         .post(this.resetMinutesPath)
         .then(resp => {
           if (resp.status === statusCodes.OK) {

ee/spec/frontend/pages/admin/users/reset_button_spec.js

@@ -3,9 +3,10 @@ import { GlButton } from '@gitlab/ui';
 import MockAdapter from 'axios-mock-adapter';
 import ResetButton from 'ee/pages/admin/users/pipeline_minutes/reset_button.vue';
 import axios from '~/lib/utils/axios_utils';
+import httpStatusCodes from '~/lib/utils/http_status';
 
 const defaultProps = { resetMinutesPath: '/adming/reset_minutes' };
-const toastMock = {
+const $toast = {
   show: jest.fn(),
 };
 
@@ -19,16 +20,14 @@ describe('Reset pipeline minutes button', () => {
         ...defaultProps,
       },
       mocks: {
-        $toast: toastMock,
+        $toast,
       },
     });
 
     mock = new MockAdapter(axios);
-    mock.onPost(defaultProps.resetMinutesPath).reply(200, {});
   });
 
   afterEach(() => {
-    mock.restore();
     wrapper.destroy();
     wrapper = null;
   });
@@ -41,13 +40,56 @@ describe('Reset pipeline minutes button', () => {
     expect(button.text()).toBe('Reset pipeline minutes');
   });
 
-  it('should call do a network request when reseting the pipelines', () => {
-    const axiosSpy = jest.spyOn(axios, 'post');
+  describe('when the api is available', () => {
+    beforeEach(() => {
+      mock
+        .onPost(defaultProps.resetMinutesPath)
+        .reply(httpStatusCodes.OK, { status: httpStatusCodes.OK });
+    });
+
+    afterEach(() => {
+      mock.restore();
+    });
+
+    it('should create a network request when the reset button is clicked', () => {
+      const axiosSpy = jest.spyOn(axios, 'post');
+
+      const button = findResetButton();
+
+      button.vm.$emit('click');
+
+      return axios.waitForAll().then(() => {
+        expect(axiosSpy).toHaveBeenCalled();
+        expect($toast.show).toHaveBeenCalledWith('User pipeline minutes were successfully reset.');
+      });
+    });
+  });
+
+  describe('when the api is not available', () => {
+    beforeEach(() => {
+      mock.onPost(defaultProps.resetMinutesPath).reply(httpStatusCodes.SERVICE_UNAVAILABLE, {
+        status: httpStatusCodes.SERVICE_UNAVAILABLE,
+      });
+    });
+
+    afterEach(() => {
+      mock.restore();
+    });
+
+    it('should show a toast error message', () => {
+      const axiosSpy = jest.spyOn(axios, 'post');
+
+      const button = findResetButton();
 
-    wrapper.vm.resetPipelineMinutes();
+      button.vm.$emit('click');
 
-    return wrapper.vm.$nextTick().then(() => {
-      expect(axiosSpy).toHaveBeenCalled();
+      return axios.waitForAll().then(() => {
+        expect(axiosSpy).toHaveBeenCalled();
+        expect($toast.show).toHaveBeenCalledWith(
+          'There was an error resetting user pipeline minutes.',
+          { type: 'error' },
+        );
+      });
     });
   });
 });