Add basic search specs for chewy indexes (#24065)

spec/chewy/accounts_index_spec.rb

@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe AccountsIndex do
+  describe 'Searching the index' do
+    before do
+      mock_elasticsearch_response(described_class, raw_response)
+    end
+
+    it 'returns results from a query' do
+      results = described_class.query(match: { name: 'account' })
+
+      expect(results).to eq []
+    end
+  end
+
+  def raw_response
+    {
+      took: 3,
+      hits: {
+        hits: [
+          {
+            _id: '0',
+            _score: 1.6375021,
+          },
+        ],
+      },
+    }
+  end
+end