show threat rate in debug output

src/test/BuildingTest.cpp

@@ -337,6 +337,85 @@ TEST_CASE("BuildingSystem: miner output buffer stalls when full", "[building]")
     REQUIRE_FALSE(b->production.has_value());
 }
 
+// ---------------------------------------------------------------------------
+// REQ-UI-DEBUG-OVERLAY production counts
+// ---------------------------------------------------------------------------
+
+TEST_CASE("BuildingSystem: productionBuildingCount excludes construction sites", "[building]")
+{
+    const GameConfig cfg = loadConfig();
+    BeltSystem belts(cfg.world.beltSpeed_tps);
+    int stock = 0;
+    std::mt19937 rng(0);
+    BuildingId nextBuildingId = 1;
+    BuildingSystem bs(cfg, belts,
+                      [&nextBuildingId]() { return nextBuildingId++; },
+                      [&stock](int n) { stock += n; },
+                      [](const std::string&, QVector2D, const std::optional<ShipLayoutConfig>&) {},
+                      [](const std::string&) -> bool { return true; },
+                      rng);
+
+    const BuildingId minerId   = bs.place(BuildingType::Miner,   QPoint(0, 0),  Rotation::East, 0);
+    const BuildingId smelterId = bs.place(BuildingType::Smelter, QPoint(10, 0), Rotation::East, 0);
+    (void)smelterId;
+
+    Tick tick = 0;
+    // Both still under construction.
+    REQUIRE(bs.productionBuildingCount() == 0);
+
+    // The queue builds one at a time: miner (10s) completes at tick 300, then
+    // the smelter (15s) starts and completes at tick 300 + 450 = 750.
+    runTicks(bs, belts, static_cast<int>(secondsToTicks(10.0)) + 1, tick);
+    REQUIRE(bs.productionBuildingCount() == 1);
+
+    runTicks(bs, belts, static_cast<int>(secondsToTicks(15.0)), tick);
+    REQUIRE(bs.productionBuildingCount() == 2);
+
+    // Neither has a recipe selected, so neither has an active cycle.
+    REQUIRE(bs.activeProductionBuildingCount() == 0);
+
+    bs.setRecipe(minerId, "mine_iron_ore");
+    runTicks(bs, belts, 1, tick);
+    REQUIRE(bs.activeProductionBuildingCount() == 1);
+}
+
+TEST_CASE("BuildingSystem: activeProductionBuildingCount tracks production cycle state",
+          "[building]")
+{
+    const GameConfig cfg = loadConfig();
+    BeltSystem belts(cfg.world.beltSpeed_tps);
+    int stock = 0;
+    std::mt19937 rng(0);
+    BuildingId nextBuildingId = 1;
+    BuildingSystem bs(cfg, belts,
+                      [&nextBuildingId]() { return nextBuildingId++; },
+                      [&stock](int n) { stock += n; },
+                      [](const std::string&, QVector2D, const std::optional<ShipLayoutConfig>&) {},
+                      [](const std::string&) -> bool { return true; },
+                      rng);
+
+    const BuildingId id = bs.place(BuildingType::Miner, QPoint(0, 0), Rotation::East, 0);
+    bs.setRecipe(id, "mine_iron_ore");
+
+    Tick tick = 0;
+    // Not yet operational while under construction.
+    REQUIRE(bs.activeProductionBuildingCount() == 0);
+
+    // Construction completes at tick 300; cycle 1 starts the same tick (completesAt=330).
+    runTicks(bs, belts, static_cast<int>(secondsToTicks(10.0)) + 1, tick);
+    REQUIRE(bs.activeProductionBuildingCount() == 1);
+
+    // Run cycles 1 and 2 to completion (1s each); cycle 3 stalls once the
+    // output buffer (capacity 2) is full (REQ-MAT-OUTPUT-BUFFER).
+    runTicks(bs, belts, 2 * static_cast<int>(secondsToTicks(1.0)) + 1, tick);
+
+    const Building* b = bs.findBuilding(id);
+    REQUIRE(b != nullptr);
+    REQUIRE(static_cast<int>(b->outputBuffer.items.size()) == 2);
+    REQUIRE_FALSE(b->production.has_value());
+    REQUIRE(bs.activeProductionBuildingCount() == 0);
+}
+
 // ---------------------------------------------------------------------------
 // Belt pull → input buffer
 // ---------------------------------------------------------------------------