Compose buildings from definitions and capabilities

tests/test_building_composition.gd

@@ -0,0 +1,35 @@
+extends SceneTree
+
+const BUILDING_DEFINITIONS = preload("res://BuildingDefinitions.gd")
+
+
+func _initialize() -> void:
+	var scene: PackedScene = load("res://Building.tscn")
+	for definition in BUILDING_DEFINITIONS.all():
+		if definition.placement_mode != "space":
+			continue
+		var building: Node2D = scene.instantiate()
+		building.definition_id = definition.definition_id
+		building._ready()
+		if building.definition == null \
+				or building.definition.definition_id != definition.definition_id \
+				or building.visual == null:
+			_fail("%s did not compose its definition and visual (resolved=%s visual=%s)" % [
+				definition.definition_id,
+				"null" if building.definition == null else building.definition.definition_id,
+				building.visual,
+			])
+			return
+		var provider: Node = building.visual.get_node_or_null("ActionProvider")
+		if provider == null or not provider.actions.has("transfer"):
+			_fail("%s has no composed action provider" % definition.definition_id)
+			return
+		building.free()
+
+	print("TEST_BUILDING_COMPOSITION: PASS")
+	quit(0)
+
+
+func _fail(message: String) -> void:
+	print("TEST_BUILDING_COMPOSITION: FAIL (%s)" % message)
+	quit(1)