feat: dungeon generation — BSP rooms, room types, fog of war

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

dungeon/generator_test.go

@@ -0,0 +1,42 @@
+package dungeon
+
+import "testing"
+
+func TestGenerateFloor(t *testing.T) {
+	floor := GenerateFloor(1)
+	if len(floor.Rooms) < 5 || len(floor.Rooms) > 8 {
+		t.Errorf("Room count: got %d, want 5~8", len(floor.Rooms))
+	}
+	bossCount := 0
+	for _, r := range floor.Rooms {
+		if r.Type == RoomBoss {
+			bossCount++
+		}
+	}
+	if bossCount != 1 {
+		t.Errorf("Boss rooms: got %d, want 1", bossCount)
+	}
+	visited := make(map[int]bool)
+	var dfs func(int)
+	dfs = func(idx int) {
+		if visited[idx] { return }
+		visited[idx] = true
+		for _, n := range floor.Rooms[idx].Neighbors { dfs(n) }
+	}
+	dfs(0)
+	if len(visited) != len(floor.Rooms) {
+		t.Errorf("Not all rooms connected: reachable %d / %d", len(visited), len(floor.Rooms))
+	}
+}
+
+func TestRoomTypeProbability(t *testing.T) {
+	counts := make(map[RoomType]int)
+	n := 10000
+	for i := 0; i < n; i++ {
+		counts[RandomRoomType()]++
+	}
+	combatPct := float64(counts[RoomCombat]) / float64(n) * 100
+	if combatPct < 40 || combatPct > 50 {
+		t.Errorf("Combat room probability: got %.1f%%, want ~45%%", combatPct)
+	}
+}