test: add a11y test for instant-search

Author: alexdln

test/nuxt/a11y.spec.ts

@@ -156,6 +156,7 @@ import {
   HeaderAccountMenu,
   HeaderConnectorModal,
   HeaderSearchBox,
+  InstantSearch,
   InputBase,
   LicenseDisplay,
   LoadingSpinner,
@@ -2657,6 +2658,14 @@ describe('component accessibility audits', () => {
     })
   })
 
+  describe('InstantSearch', () => {
+    it('should have no accessibility violations', async () => {
+      const component = await mountSuspended(InstantSearch)
+      const results = await runAxe(component)
+      expect(results.violations).toEqual([])
+    })
+  })
+
   describe('SearchProviderToggle', () => {
     it('should have no accessibility violations', async () => {
       const component = await mountSuspended(SearchProviderToggle)