[test] added train save/load test

server/test/train/saveload.cpp

@@ -0,0 +1,104 @@
+/**
+ * This file is part of Traintastic,
+ * see <https://github.com/traintastic/traintastic>.
+ *
+ * Copyright (C) 2025 Reinder Feenstra
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#include <catch2/catch_test_macros.hpp>
+#include "../src/world/world.hpp"
+#include "../src/world/worldloader.hpp"
+#include "../src/world/worldsaver.hpp"
+#include "../src/core/method.tpp"
+#include "../src/core/objectproperty.tpp"
+#include "../src/hardware/decoder/list/decoderlist.hpp"
+#include "../src/vehicle/rail/locomotive.hpp"
+#include "../src/vehicle/rail/railvehiclelist.hpp"
+#include "../src/train/train.hpp"
+#include "../src/train/trainlist.hpp"
+#include "../src/train/trainvehiclelist.hpp"
+
+TEST_CASE("Train: Save/Load", "[train][train-saveload]")
+{
+  std::filesystem::path ctw;
+  std::string worldUUID;
+
+  {
+    INFO("Create world");
+    auto world = World::create();
+
+    {
+      worldUUID = world->uuid;
+
+      auto decoder = world->decoders->create();
+
+      auto locomotive = world->railVehicles->create(Locomotive::classId);
+      locomotive->decoder = decoder;
+      REQUIRE(decoder->vehicle.value() == locomotive);
+
+      auto train = world->trains->create();
+      train->vehicles->add(locomotive);
+      REQUIRE(locomotive->trains[0] == train);
+    }
+
+    INFO("Saving...");
+    {
+      ctw = std::filesystem::temp_directory_path() / std::string(world->uuid.value()).append(World::dotCTW);
+      WorldSaver saver(*world, ctw);
+    }
+    INFO("Saved");
+  }
+
+  {
+    std::shared_ptr<World> world;
+    {
+      INFO("Loading...");
+      WorldLoader loader(ctw);
+      world = loader.world();
+      REQUIRE(world);
+      INFO("Loaded");
+    }
+
+    {
+      REQUIRE(world->uuid.value() == worldUUID);
+
+      REQUIRE(world->decoders->length == 1);
+      auto decoder = world->decoders->operator[](0);
+      REQUIRE(decoder);
+
+      REQUIRE(world->railVehicles->length == 1);
+      auto locomotive = std::dynamic_pointer_cast<Locomotive>(world->railVehicles->operator[](0));
+      REQUIRE(locomotive);
+
+      REQUIRE(world->trains->length == 1);
+      auto train = world->trains->operator[](0);
+      REQUIRE(train);
+
+      REQUIRE(decoder->vehicle.value() == locomotive);
+
+      REQUIRE(locomotive->decoder.value() == decoder);
+      REQUIRE(locomotive->trains.size() == 1);
+      REQUIRE(locomotive->trains[0] == train);
+
+      REQUIRE(train->vehicles->length == 1);
+      REQUIRE(train->vehicles->operator[](0) == locomotive);
+    }
+  }
+
+  INFO("Remove saved world");
+  REQUIRE(std::filesystem::remove(ctw));
+}