1 files changed, 31 insertions, 0 deletions
diff --git a/internal/casino/machine_test.go b/internal/casino/machine_test.go
index 53fe2e6..349a452 100644
--- a/internal/casino/machine_test.go
+++ b/internal/casino/machine_test.go
@@ -113,3 +113,34 @@ func TestMachineDisconnectFreesSeatAndForfeitsSpin(t *testing.T) {
 		t.Fatalf("empty machine emitted events after disconnect: %+v", events)
 	}
 }
+
+func TestMachineFreeSpinsDoNotRetrigger(t *testing.T) {
+	m := newMachine(1, MachineConfig{ID: "slots", Game: GameSlots}, rand.New(rand.NewSource(7)))
+	m.player = &Participant{Name: "alice", Connected: true, Wallet: &testWallet{credits: 100}}
+	m.spinBet = 10
+	m.inFreeSpins = true
+	m.freeSpins = 1
+	m.spin = &SlotSpin{ScatterCount: 3}
+	events := m.finishSpin()
+	for _, e := range events {
+		if hasMessage([]Event{e}, "trigger") {
+			t.Fatalf("scatters during free spins retriggered: %+v", events)
+		}
+	}
+	// The last free spin resolved; the feature is now over.
+	m.spin = &SlotSpin{ScatterCount: 3}
+	m.finishSpin()
+	if m.freeSpins != 0 || m.inFreeSpins {
+		t.Fatalf("free-spin feature did not end: freeSpins=%d inFreeSpins=%v", m.freeSpins, m.inFreeSpins)
+	}
+	// Scatters on a paid spin trigger normally again.
+	m.phase = machineReady
+	m.spin = &SlotSpin{ScatterCount: 3}
+	events = m.finishSpin()
+	if m.freeSpins != m.profile.FreeSpinCount-1 || !m.inFreeSpins {
+		t.Fatalf("paid-spin trigger broken: freeSpins=%d inFreeSpins=%v", m.freeSpins, m.inFreeSpins)
+	}
+	if !hasMessage(events, "trigger") {
+		t.Fatalf("missing trigger message: %+v", events)
+	}
+}