Remove unnecessary stubbed component

And also fix one more typo in a constant.

app/assets/javascripts/releases/components/releases_sort_apollo_client.vue

 <script>
 import { GlSorting, GlSortingItem } from '@gitlab/ui';
 import {
-  ASCENDING_ODER,
+  ASCENDING_ORDER,
   DESCENDING_ORDER,
   SORT_OPTIONS,
   RELEASED_AT,
@@ -36,7 +36,7 @@ export default {
     },
     direction() {
       if (this.value === RELEASED_AT_ASC || this.value === CREATED_ASC) {
-        return ASCENDING_ODER;
+        return ASCENDING_ORDER;
       }
 
       return DESCENDING_ORDER;
@@ -48,12 +48,12 @@ export default {
       return this.sortOptions.find((s) => s.orderBy === this.orderBy).label;
     },
     isDirectionAscending() {
-      return this.direction === ASCENDING_ODER;
+      return this.direction === ASCENDING_ORDER;
     },
   },
   methods: {
     onDirectionChange() {
-      const direction = this.isDirectionAscending ? DESCENDING_ORDER : ASCENDING_ODER;
+      const direction = this.isDirectionAscending ? DESCENDING_ORDER : ASCENDING_ORDER;
       this.emitInputEventIfChanged(this.orderBy, direction);
     },
     onSortItemClick(item) {

spec/frontend/releases/components/releases_sort_apollo_client_spec.js

-import { GlSorting } from '@gitlab/ui';
+import { GlSorting, GlSortingItem } from '@gitlab/ui';
 import { shallowMountExtended } from 'helpers/vue_test_utils_helper';
 import ReleasesSortApolloClient from '~/releases/components/releases_sort_apollo_client.vue';
 import { RELEASED_AT_ASC, RELEASED_AT_DESC, CREATED_ASC, CREATED_DESC } from '~/releases/constants';
 
-const GlSortingItemStub = {
-  template: '<div><slot></slot></div>',
-};
-
 describe('releases_sort_apollo_client.vue', () => {
   let wrapper;
 
@@ -16,7 +12,7 @@ describe('releases_sort_apollo_client.vue', () => {
         value: valueProp,
       },
       stubs: {
-        GlSortingItem: GlSortingItemStub,
+        GlSortingItem,
       },
     });
   };
@@ -26,7 +22,7 @@ describe('releases_sort_apollo_client.vue', () => {
   });
 
   const findSorting = () => wrapper.findComponent(GlSorting);
-  const findSortingItems = () => wrapper.findAllComponents(GlSortingItemStub);
+  const findSortingItems = () => wrapper.findAllComponents(GlSortingItem);
   const findReleasedDateItem = () =>
     findSortingItems().wrappers.find((item) => item.text() === 'Released date');
   const findCreatedDateItem = () =>
@@ -96,4 +92,12 @@ describe('releases_sort_apollo_client.vue', () => {
       expect(wrapper.emitted().input?.[0]?.[0]).toEqual(emittedEvent);
     });
   });
+
+  describe('prop validation', () => {
+    it('validates that the `value` prop is one of the expected sort strings', () => {
+      expect(() => {
+        createComponent('not a valid value');
+      }).toThrow('Invalid prop: custom validator check failed');
+    });
+  });
 });