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diff --git a/spec/frontend/invite_members/components/members_token_select_spec.js b/spec/frontend/invite_members/components/members_token_select_spec.js
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+++ b/spec/frontend/invite_members/components/members_token_select_spec.js
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+import { shallowMount } from '@vue/test-utils';
+import { nextTick } from 'vue';
+import { GlTokenSelector } from '@gitlab/ui';
+import waitForPromises from 'helpers/wait_for_promises';
+import Api from '~/api';
+import MembersTokenSelect from '~/invite_members/components/members_token_select.vue';
+
+const label = 'testgroup';
+const placeholder = 'Search for a member';
+const user1 = { id: 1, name: 'Name One', username: 'one_1', avatar_url: '' };
+const user2 = { id: 2, name: 'Name Two', username: 'two_2', avatar_url: '' };
+const allUsers = [user1, user2];
+
+const createComponent = () => {
+  return shallowMount(MembersTokenSelect, {
+    propsData: {
+      ariaLabelledby: label,
+      placeholder,
+    },
+  });
+};
+
+describe('MembersTokenSelect', () => {
+  let wrapper;
+
+  beforeEach(() => {
+    jest.spyOn(Api, 'users').mockResolvedValue({ data: allUsers });
+    wrapper = createComponent();
+  });
+
+  afterEach(() => {
+    wrapper.destroy();
+    wrapper = null;
+  });
+
+  const findTokenSelector = () => wrapper.find(GlTokenSelector);
+
+  describe('rendering the token-selector component', () => {
+    it('renders with the correct props', () => {
+      const expectedProps = {
+        ariaLabelledby: label,
+        placeholder,
+      };
+
+      expect(findTokenSelector().props()).toEqual(expect.objectContaining(expectedProps));
+    });
+  });
+
+  describe('users', () => {
+    describe('when input is focused for the first time (modal auto-focus)', () => {
+      it('does not call the API', async () => {
+        findTokenSelector().vm.$emit('focus');
+
+        await waitForPromises();
+
+        expect(Api.users).not.toHaveBeenCalled();
+      });
+    });
+
+    describe('when input is manually focused', () => {
+      it('calls the API and sets dropdown items as request result', async () => {
+        const tokenSelector = findTokenSelector();
+
+        tokenSelector.vm.$emit('focus');
+        tokenSelector.vm.$emit('blur');
+        tokenSelector.vm.$emit('focus');
+
+        await waitForPromises();
+
+        expect(tokenSelector.props('dropdownItems')).toMatchObject(allUsers);
+        expect(tokenSelector.props('hideDropdownWithNoItems')).toBe(false);
+      });
+    });
+
+    describe('when text input is typed in', () => {
+      it('calls the API with search parameter', async () => {
+        const searchParam = 'One';
+        const tokenSelector = findTokenSelector();
+
+        tokenSelector.vm.$emit('text-input', searchParam);
+
+        await waitForPromises();
+
+        expect(Api.users).toHaveBeenCalledWith(searchParam, wrapper.vm.$options.queryOptions);
+        expect(tokenSelector.props('hideDropdownWithNoItems')).toBe(false);
+      });
+    });
+
+    describe('when user is selected', () => {
+      it('emits `input` event with selected users', () => {
+        findTokenSelector().vm.$emit('input', [
+          { id: 1, name: 'John Smith' },
+          { id: 2, name: 'Jane Doe' },
+        ]);
+
+        expect(wrapper.emitted().input[0][0]).toBe('1,2');
+      });
+    });
+  });
+
+  describe('when text input is blurred', () => {
+    it('clears text input', async () => {
+      const tokenSelector = findTokenSelector();
+
+      tokenSelector.vm.$emit('blur');
+
+      await nextTick();
+
+      expect(tokenSelector.props('hideDropdownWithNoItems')).toBe(false);
+    });
+  });
+});