refactor(server): test fixtures (#3491)

server/test/fixtures/search.stub.ts

@@ -0,0 +1,12 @@
+import { SearchResult } from '@app/domain';
+
+export const searchStub = {
+  emptyResults: Object.freeze<SearchResult<any>>({
+    total: 0,
+    count: 0,
+    page: 1,
+    items: [],
+    facets: [],
+    distances: [],
+  }),
+};