1 files changed, 114 insertions, 0 deletions
diff --git a/internal/game/bank_transport_regression_test.go b/internal/game/bank_transport_regression_test.go
new file mode 100644
index 0000000..529df84
--- /dev/null
+++ b/internal/game/bank_transport_regression_test.go
@@ -0,0 +1,114 @@
+package game
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"thehouseoficarus/internal/behavior"
+	"thehouseoficarus/internal/casino"
+	"thehouseoficarus/internal/combat"
+	"thehouseoficarus/internal/item"
+	"thehouseoficarus/internal/net"
+	"thehouseoficarus/internal/player"
+	"thehouseoficarus/internal/world"
+)
+
+// regressionGame builds a minimal Game with real stores over a temp data dir.
+func regressionGame(t *testing.T) (*Game, *net.Session) {
+	t.Helper()
+	dir := t.TempDir()
+	for _, sub := range []string{"items", "rooms"} {
+		if err := os.MkdirAll(filepath.Join(dir, sub), 0o755); err != nil {
+			t.Fatal(err)
+		}
+	}
+	if err := os.WriteFile(filepath.Join(dir, "items", "chips.yaml"), []byte("name: chips\nstackable: true\n"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(filepath.Join(dir, "rooms", "1.yaml"), []byte("name: test\n"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	g := &Game{
+		Deps: Deps{
+			World:        world.New(dir),
+			ItemStore:    item.NewItemStore(dir),
+			AccountStore: player.NewAccountStore(dir),
+		},
+		Casino: casino.NewManager(1),
+		Combat: combat.NewTracker(),
+	}
+	sess := &net.Session{Player: player.New("alice"), Conn: &casinoTestConn{}}
+	sess.Player.RoomID = 1
+	return g, sess
+}
+
+// Regression: a stackable withdrawal must succeed via stack merging even
+// when the inventory has zero free slots.
+func TestBankWithdrawMergesStackIntoFullInventory(t *testing.T) {
+	g, sess := regressionGame(t)
+	for i := 0; i < 28; i++ {
+		sess.Player.SetInvSlot(i, &player.InventorySlot{ItemID: "filler", Quantity: 1})
+	}
+	sess.Player.SetInvSlot(0, &player.InventorySlot{ItemID: "chips", Quantity: 10})
+	sess.Player.SetBankSlot(0, &player.InventorySlot{ItemID: "chips", Quantity: 5})
+
+	g.doBankWithdraw(sess, "1")
+
+	inv := sess.Player.InvSlot(0)
+	if inv == nil || inv.Quantity != 15 {
+		t.Fatalf("stack withdrawal blocked by a full inventory: inventory=%+v", inv)
+	}
+	if sess.Player.BankSlot(0) != nil {
+		t.Fatal("bank slot was not cleared after the withdrawal")
+	}
+}
+
+// Regression: stacks of the same item but different quality must not merge,
+// which would silently destroy the withdrawn stack's properties.
+func TestBankWithdrawKeepsIncompatibleQualitySeparate(t *testing.T) {
+	g, sess := regressionGame(t)
+	sess.Player.SetInvSlot(0, &player.InventorySlot{ItemID: "chips", Quantity: 10, Quality: 3, MaxQuality: 10})
+	sess.Player.SetBankSlot(0, &player.InventorySlot{ItemID: "chips", Quantity: 5, Quality: 8, MaxQuality: 10})
+
+	g.doBankWithdraw(sess, "1")
+
+	first, second := sess.Player.InvSlot(0), sess.Player.InvSlot(1)
+	if first == nil || first.Quantity != 10 || first.Quality != 3 {
+		t.Fatalf("existing stack was disturbed: %+v", first)
+	}
+	if second == nil || second.Quantity != 5 || second.Quality != 8 || second.MaxQuality != 10 {
+		t.Fatalf("incompatible stack was merged or metadata lost: first=%+v second=%+v", first, second)
+	}
+}
+
+// Regression: sequenced transport modules (like transport_home) bypass
+// triggerTransport entirely; the casino gate must also apply when the module
+// is started.
+func TestSequencedTransportBlockedWhilePlaying(t *testing.T) {
+	g, sess := regressionGame(t)
+
+	oldMods, oldIndex := AllMods, modByID
+	t.Cleanup(func() { AllMods, modByID = oldMods, oldIndex })
+	mod := &ModDef{
+		ID: "transport_home", Name: "transport home", Category: ModTransport,
+		Level: 1, Destination: 2,
+		Sequence: []behavior.ModTriggerStep{{Message: "wait", Delay: 1}},
+	}
+	AllMods = []*ModDef{mod}
+	modByID = map[string]*ModDef{mod.ID: mod}
+
+	g.Casino.JoinMachine(1, casino.MachineConfig{ID: "slots", Game: casino.GameSlots}, sess.Player.Name)
+	conn := sess.Conn.(*casinoTestConn)
+	conn.data = nil
+
+	g.doTrigger(sess, "transport_home")
+
+	if sess.Player.Action != nil {
+		t.Fatalf("transport sequence scheduled despite casino participation: %+v", sess.Player.Action)
+	}
+	if !strings.Contains(string(conn.data), "playing a game") {
+		t.Fatalf("missing casino-gate message: %q", string(conn.data))
+	}
+}