feat: Use embeddings in help center search (#9227)

spec/enterprise/controllers/enterprise/public/api/v1/portals/articles_controller_spec.rb

@@ -0,0 +1,19 @@
+require 'rails_helper'
+
+RSpec.describe 'Public Articles API', type: :request do
+  let!(:portal) { create(:portal, slug: 'test-portal', config: { allowed_locales: %w[en es] }, custom_domain: 'www.example.com') }
+
+  describe 'GET /public/api/v1/portals/:slug/articles' do
+    before do
+      portal.account.enable_features!(:help_center_embedding_search)
+    end
+
+    context 'with help_center_embedding_search feature' do
+      it 'get all articles with searched text query using vector search if enabled' do
+        allow(Article).to receive(:vector_search)
+        get "/hc/#{portal.slug}/en/articles.json", params: { query: 'funny' }
+        expect(Article).to have_received(:vector_search)
+      end
+    end
+  end
+end