add feature not avaialble handling to search (#513)

core/operations/document_search.cxx

@@ -334,6 +334,18 @@ search_request::make_response(error_context::search&& ctx, const encoded_respons
                 response.ctx.ec = errc::common::rate_limited;
                 return response;
             }
+        } else if (encoded.status_code == 404) {
+            tao::json::value payload{};
+            try {
+                payload = utils::json::parse(encoded.body.data());
+            } catch (const tao::pegtl::parse_error&) {
+                response.ctx.ec = errc::common::parsing_failure;
+                return response;
+            }
+            response.status = payload.at("status").get_string();
+            response.error = payload.at("error").get_string();
+            response.ctx.ec = errc::common::feature_not_available;
+            return response;
         }
         response.ctx.ec = errc::common::internal_server_failure;
     }

test/test_integration_search.cxx

@@ -35,6 +35,7 @@
 #include "core/operations/management/search_index_drop.hxx"
 #include "core/operations/management/search_index_upsert.hxx"
 
+#include <couchbase/match_none_query.hxx>
 #include <couchbase/query_string_query.hxx>
 
 #include <regex>
@@ -640,3 +641,19 @@ TEST_CASE("integration: search query collections")
         REQUIRE_SUCCESS(resp.ctx.ec);
     }
 }
+
+TEST_CASE("integration: scope search returns feature not available", "[integration]")
+{
+    test::utils::integration_test_guard integration;
+
+    if (integration.cluster_version().supports_scope_search()) {
+        SKIP("cluster supports scope search");
+    }
+
+    couchbase::cluster c(integration.cluster);
+
+    auto search_request = couchbase::search_request(couchbase::match_none_query{});
+    auto [ctx, result] = c.bucket(integration.ctx.bucket).default_scope().search("does-not-exist", search_request).get();
+
+    REQUIRE(ctx.ec() == couchbase::errc::common::feature_not_available);
+}