implement copy building settings with shift + click gesture

src/test/BuildingConfigTest.cpp

@@ -0,0 +1,133 @@
+#include "catch.hpp"
+
+#include "Building.h"
+#include "BuildingConfig.h"
+#include "BuildingSystem.h"
+#include "BuildingType.h"
+#include "ConfigLoader.h"
+#include "GameConfig.h"
+#include "Rotation.h"
+#include "ShipLayout.h"
+#include "ShipsConfig.h"
+#include "Simulation.h"
+#include "SimulationTestAccess.h"
+
+// readBuildingConfig underpins the copy-settings gesture (REQ-BLD-COPY-CONFIG):
+// it extracts a building's recipe / schematic / layout / splitter filters so they
+// can be stamped onto a same-type building. It reads operational buildings and
+// construction sites alike.
+
+namespace
+{
+GameConfig loadConfig()
+{
+    return ConfigLoader::loadFromDirectory(CONFIG_DIR);
+}
+
+const BuildingDef* findDef(const GameConfig& cfg, BuildingType type)
+{
+    for (const BuildingDef& def : cfg.buildings.buildings)
+    {
+        if (def.type == type) { return &def; }
+    }
+    return nullptr;
+}
+
+BuildingId placeOperational(Simulation& sim, const GameConfig& cfg,
+                            BuildingType type, QPoint anchor)
+{
+    const BuildingDef* def = findDef(cfg, type);
+    REQUIRE(def != nullptr);
+    return SimulationTestAccess::buildings(sim).placeImmediate(
+        type, def->surfaceMask, anchor, Rotation::East);
+}
+
+const ShipDef* findAvailableSchematic(const GameConfig& cfg)
+{
+    for (const ShipDef& def : cfg.ships.ships)
+    {
+        if (def.unlockAtStationLevel == -1) { return &def; }
+    }
+    return nullptr;
+}
+}  // namespace
+
+TEST_CASE("readBuildingConfig returns a miner's selected recipe", "[copyconfig]")
+{
+    const GameConfig cfg = loadConfig();
+    Simulation sim(loadConfig(), 7);
+
+    const BuildingId id = placeOperational(sim, cfg, BuildingType::Miner, QPoint(0, 0));
+    SimulationTestAccess::buildings(sim).setRecipe(id, "mine_iron_ore");
+
+    const std::optional<BuildingConfig> config = readBuildingConfig(sim, id);
+    REQUIRE(config.has_value());
+    CHECK(config->type == BuildingType::Miner);
+    REQUIRE(config->recipeId.has_value());
+    CHECK(*config->recipeId == "mine_iron_ore");
+    CHECK_FALSE(config->isSplitter);
+    CHECK_FALSE(config->shipLayout.has_value());
+}
+
+TEST_CASE("readBuildingConfig leaves recipe unset when nothing is selected",
+          "[copyconfig]")
+{
+    const GameConfig cfg = loadConfig();
+    Simulation sim(loadConfig(), 7);
+
+    const BuildingId id = placeOperational(sim, cfg, BuildingType::Assembler, QPoint(0, 0));
+
+    const std::optional<BuildingConfig> config = readBuildingConfig(sim, id);
+    REQUIRE(config.has_value());
+    CHECK(config->type == BuildingType::Assembler);
+    CHECK_FALSE(config->recipeId.has_value());  // nothing to copy
+    CHECK_FALSE(config->isSplitter);
+}
+
+TEST_CASE("readBuildingConfig returns a shipyard's schematic and layout",
+          "[copyconfig]")
+{
+    const GameConfig cfg = loadConfig();
+    Simulation sim(loadConfig(), 7);
+
+    const ShipDef* schematic = findAvailableSchematic(cfg);
+    REQUIRE(schematic != nullptr);
+
+    const BuildingId id = placeOperational(sim, cfg, BuildingType::Shipyard, QPoint(0, 0));
+    SimulationTestAccess::buildings(sim).setRecipe(id, schematic->id);
+    SimulationTestAccess::buildings(sim).setShipLayout(id, ShipLayoutConfig{});
+
+    const std::optional<BuildingConfig> config = readBuildingConfig(sim, id);
+    REQUIRE(config.has_value());
+    CHECK(config->type == BuildingType::Shipyard);
+    REQUIRE(config->recipeId.has_value());
+    CHECK(*config->recipeId == schematic->id);
+    CHECK(config->shipLayout.has_value());
+}
+
+TEST_CASE("readBuildingConfig reads a queued construction site", "[copyconfig]")
+{
+    const GameConfig cfg = loadConfig();
+    Simulation sim(loadConfig(), 7);
+
+    // A placed miner enters the construction queue as a site (not yet operational).
+    const BuildingId id =
+        SimulationTestAccess::place(sim, BuildingType::Miner, QPoint(-2, 0), Rotation::East);
+    REQUIRE(id != kInvalidBuildingId);
+    REQUIRE(sim.buildings().findBuilding(id) == nullptr);
+    REQUIRE(sim.buildings().findSite(id) != nullptr);
+
+    SimulationTestAccess::buildings(sim).setRecipe(id, "mine_iron_ore");
+
+    const std::optional<BuildingConfig> config = readBuildingConfig(sim, id);
+    REQUIRE(config.has_value());
+    CHECK(config->type == BuildingType::Miner);
+    REQUIRE(config->recipeId.has_value());
+    CHECK(*config->recipeId == "mine_iron_ore");
+}
+
+TEST_CASE("readBuildingConfig returns nullopt for an unknown id", "[copyconfig]")
+{
+    Simulation sim(loadConfig(), 7);
+    CHECK_FALSE(readBuildingConfig(sim, kInvalidBuildingId).has_value());
+}