finished statement cache class

test/orm/backend/test_statement.cpp

@@ -2,11 +2,18 @@
 #include "test_result_reader.hpp"
 #include "test_parameter_binder.hpp"
 
+#include <random>
+#include <thread>
+
 namespace matador::test::orm {
 test_statement::test_statement(const sql::query_context &query)
 : statement_impl(query) {}
 
 utils::result<size_t, utils::error> test_statement::execute(const sql::interface::parameter_binder &/*bindings*/) {
+  using namespace std::chrono_literals;
+  std::mt19937 rng(query_.sql.size());
+  std::uniform_int_distribution dist(10, 40);
+  std::this_thread::sleep_for(std::chrono::milliseconds(dist(rng)));
   return utils::ok(static_cast<size_t>(8));
 }