1 files changed, 89 insertions, 0 deletions
diff --git a/spec/frontend/groups/members/components/app_spec.js b/spec/frontend/groups/members/components/app_spec.js
new file mode 100644
index 00000000000..de9f30649e9
--- /dev/null
+++ b/spec/frontend/groups/members/components/app_spec.js
@@ -0,0 +1,89 @@
+import { shallowMount, createLocalVue } from '@vue/test-utils';
+import { nextTick } from 'vue';
+import Vuex from 'vuex';
+import { GlAlert } from '@gitlab/ui';
+import App from '~/groups/members/components/app.vue';
+import * as commonUtils from '~/lib/utils/common_utils';
+import {
+  RECEIVE_MEMBER_ROLE_ERROR,
+  HIDE_ERROR,
+} from '~/vuex_shared/modules/members/mutation_types';
+import mutations from '~/vuex_shared/modules/members/mutations';
+
+describe('GroupMembersApp', () => {
+  const localVue = createLocalVue();
+  localVue.use(Vuex);
+
+  let wrapper;
+  let store;
+
+  const createComponent = (state = {}) => {
+    store = new Vuex.Store({
+      state: {
+        showError: true,
+        errorMessage: 'Something went wrong, please try again.',
+        ...state,
+      },
+      mutations,
+    });
+
+    wrapper = shallowMount(App, {
+      localVue,
+      store,
+    });
+  };
+
+  const findAlert = () => wrapper.find(GlAlert);
+
+  beforeEach(() => {
+    commonUtils.scrollToElement = jest.fn();
+  });
+
+  afterEach(() => {
+    wrapper.destroy();
+    store = null;
+  });
+
+  describe('when `showError` is changed to `true`', () => {
+    it('renders and scrolls to error alert', async () => {
+      createComponent({ showError: false, errorMessage: '' });
+
+      store.commit(RECEIVE_MEMBER_ROLE_ERROR);
+
+      await nextTick();
+
+      const alert = findAlert();
+
+      expect(alert.exists()).toBe(true);
+      expect(alert.text()).toBe(
+        "An error occurred while updating the member's role, please try again.",
+      );
+      expect(commonUtils.scrollToElement).toHaveBeenCalledWith(alert.element);
+    });
+  });
+
+  describe('when `showError` is changed to `false`', () => {
+    it('does not render and scroll to error alert', async () => {
+      createComponent();
+
+      store.commit(HIDE_ERROR);
+
+      await nextTick();
+
+      expect(findAlert().exists()).toBe(false);
+      expect(commonUtils.scrollToElement).not.toHaveBeenCalled();
+    });
+  });
+
+  describe('when alert is dismissed', () => {
+    it('hides alert', async () => {
+      createComponent();
+
+      findAlert().vm.$emit('dismiss');
+
+      await nextTick();
+
+      expect(findAlert().exists()).toBe(false);
+    });
+  });
+});