Add a free-costs sandbox tool

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019AJMdB7iuHuLFZM1aBu3GD

tests/test_dev_menu.gd

@@ -5,6 +5,7 @@ extends SceneTree
 # the live fleet, not only GameState bookkeeping.
 
 const VESSEL_DEFINITIONS = preload("res://vessels/VesselDefinitions.gd")
+const BUILDING_DEFINITIONS = preload("res://buildings/BuildingDefinitions.gd")
 
 var state: Node
 var scene: Node
@@ -73,6 +74,39 @@ func _process(delta: float) -> bool:
 				return _fail("unlimited mode did not replenish research points")
 			print("skill unlock and unlimited resources operate on persistent GameState")
 
+			# --- #202: every research and production price reads zero -------
+			# Unlimited resources goes off first: a bottomless bank and a free
+			# price are indistinguishable while both are on, and it is the
+			# price this checks.
+			menu.unlimited_button.pressed.emit()
+			if state.dev_unlimited_resources:
+				return _fail("the unlimited-resources toggle did not turn back off")
+			var charged: int = _priced_things()
+			if charged == 0:
+				return _fail("nothing in the game carries a price to make free")
+			menu.free_costs_button.pressed.emit()
+			if not state.dev_free_costs:
+				return _fail("the free-costs toggle did not turn on")
+			if _priced_things() != 0:
+				return _fail("%d prices survived the free-costs toggle" % _priced_things())
+			# The accessors are what every purchase, queue and price label
+			# reads, so an empty bank must now afford anything.
+			for resource_type in state.resource_types():
+				state.bank_inventory.set_amount(resource_type, 0)
+				state.fleet_inventory.set_amount(resource_type, 0)
+			state.research_points = 0
+			for definition in BUILDING_DEFINITIONS.all():
+				if not state.can_afford_resources(state.building_costs(String(definition.definition_id))):
+					return _fail("a broke fleet could not afford the free %s" % definition.definition_id)
+			print("free costs zeroed every research and production price")
+
+			menu.free_costs_button.pressed.emit()
+			if state.dev_free_costs:
+				return _fail("the free-costs toggle did not turn back off")
+			if _priced_things() != charged:
+				return _fail("turning free costs off did not restore every price")
+			print("prices come back exactly as they were when the toggle goes off")
+
 			var wave_before: int = state.wave_number
 			menu.wave_button.pressed.emit()
 			if menu.visible:
@@ -81,7 +115,7 @@ func _process(delta: float) -> bool:
 				return _fail("the dev menu did not retain the immediate wave tool")
 
 			state.reset_new_game()
-			if state.dev_mode or state.dev_unlimited_resources:
+			if state.dev_mode or state.dev_unlimited_resources or state.dev_free_costs:
 				return _fail("dev cheats leaked into a normal new game")
 			print("TEST_DEV_MENU: PASS")
 			quit(0)
@@ -89,6 +123,30 @@ func _process(delta: float) -> bool:
 	return false
 
 
+# How many prices in the whole game are currently non-zero: skills, vessel
+# unlocks and upgrades on the research side, buildings and vessel production
+# on the other. Counted rather than sampled so a price added later is covered
+# here without anyone remembering to add it.
+func _priced_things() -> int:
+	var total: int = 0
+	for node in GameState.SKILL_TREE:
+		var id: String = String(node.id)
+		total += state.skill_costs(id).size() + state.skill_research_point_cost(id)
+	for definition in BUILDING_DEFINITIONS.all():
+		total += state.building_costs(String(definition.definition_id)).size()
+	for definition in VESSEL_DEFINITIONS.all():
+		total += state.product_costs(String(definition.definition_id)).size()
+		var unlock_id: String = String(definition.unlock_id)
+		if unlock_id != "":
+			total += state.research_costs(unlock_id).size() \
+				+ state.research_point_cost(unlock_id)
+		for upgrade in definition.upgrades:
+			var upgrade_id: String = String(upgrade.upgrade_id)
+			total += state.upgrade_cost(upgrade_id) \
+				+ state.research_point_cost(upgrade_id)
+	return total
+
+
 func _fail(message: String) -> bool:
 	print("TEST_DEV_MENU: FAIL (%s)" % message)
 	quit(1)