Add test for asynchronous transactions

test/CMakeLists.txt

@@ -22,6 +22,7 @@
 ### append test cases here (file name without the ".cpp" suffix)
 #######################################################################
 set(test_cases
+    test_async
     test_connection
     test_list_properties
     test_properties

test/test_async.cpp

+/*
+ * This file is a part of the CaosDB Project.
+ *
+ * Copyright (C) 2022 IndiScale GmbH <info@indiscale.com>
+ * Copyright (C) 2022 Timm Fitschen <t.fitschen@indiscale.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#include "caosdb/entity.h"             // for Entity, Property
+#include "caosdb/connection.h"         // for Connection, Connec...
+#include "caosdb/message_code.h"       // for ENTITY_DOES_NOT_EXIST, Messag...
+#include "caosdb/status_code.h"        // for StatusCode, SUCCESS
+#include "caosdb/transaction.h"        // for Entity, Transaction
+#include "caosdb/transaction_status.h" // for TransactionStatus
+#include <chrono>                      // for operator""ms, chrono_literals
+#include <gtest/gtest-message.h>       // for Message
+#include <gtest/gtest-test-part.h>     // for TestPartResult
+#include <gtest/gtest_pred_impl.h>     // for AssertionResult
+#include <memory>                      // for allocator, unique_ptr, __shar...
+#include <thread>
+
+namespace caosdb::transaction {
+using caosdb::entity::MessageCode;
+
+/*
+ * Test the retrieval of a non-existing entity
+ *
+ * The transaction is being executed and we can retrieve the state in the mean
+ * time.
+ */
+TEST(test_async, retrieve_non_existing) {
+  using namespace std::chrono_literals;
+  const auto &connection = caosdb::connection::ConnectionManager::GetDefaultConnection();
+
+  auto transaction(connection->CreateTransaction());
+
+  const auto *id = "non-existing-id";
+  transaction->RetrieveById(id);
+  transaction->ExecuteAsynchronously();
+
+  auto status = transaction->GetStatus();
+  EXPECT_EQ(status.GetCode(), StatusCode::EXECUTING);
+
+  // wait some time
+  std::this_thread::sleep_for(1000ms);
+
+  // DONT call WaitForIt -> the transaction finishes in the back-ground
+  status = transaction->GetStatus();
+  EXPECT_EQ(status.GetCode(), TransactionStatus::TRANSACTION_ERROR().GetCode());
+  ASSERT_EQ(status.GetCode(), StatusCode::GENERIC_TRANSACTION_ERROR);
+
+  const auto &result_set = transaction->GetResultSet();
+
+  const auto &entity = result_set.at(0);
+  EXPECT_EQ(id, entity.GetId());
+  EXPECT_TRUE(entity.HasErrors());
+  ASSERT_EQ(entity.GetErrors().size(), 1);
+  EXPECT_EQ(entity.GetErrors().at(0).GetCode(), MessageCode::ENTITY_DOES_NOT_EXIST);
+}
+
+} // namespace caosdb::transaction