should be it

external/duckdb/test/api/test_extension_setting_autoload.cpp

@@ -0,0 +1,31 @@
+#include "catch.hpp"
+#include "test_helpers.hpp"
+
+#include <iostream>
+#include <map>
+#include <set>
+
+using namespace duckdb;
+using namespace std;
+
+TEST_CASE("Test autoload of extension settings", "[api]") {
+	DBConfig config;
+	config.SetOptionByName("timezone", "America/Los_Angeles");
+
+	config.options.allow_unsigned_extensions = true;
+	config.options.autoload_known_extensions = true;
+	auto env_var = std::getenv("LOCAL_EXTENSION_REPO");
+	if (!env_var) {
+		return;
+	}
+	config.options.autoinstall_extension_repo = std::string(env_var);
+	REQUIRE(config.options.unrecognized_options.count("timezone"));
+
+	// Create a connection
+	duckdb::unique_ptr<DuckDB> db;
+	REQUIRE_NOTHROW(db = make_uniq<DuckDB>(nullptr, &config));
+	Connection con(*db);
+
+	auto res = con.Query("select current_setting('timezone')");
+	REQUIRE(CHECK_COLUMN(res, 0, {Value("America/Los_Angeles")}));
+}