extends SceneTree
var checks:=0
var failures:=0
func expect(ok: bool,label: String)->void:
 checks+=1
 if not ok:failures+=1;push_error(label)
func _initialize()->void:call_deferred("run")
func run()->void:
 var world:=WorldService.new()
 var bounds:={&"min_x":0,&"max_x":5,&"min_y":-2,&"max_y":2}
 world.reset(bounds)
 world.set_walkable(Vector3i(0,0,0),true)
 world.set_support(Vector3i(0,0,0),5,true)
 var original:=world.create_snapshot()
 var copy:=world.create_snapshot()
 copy[&"support"][0][&"capacity"]=99
 copy[&"bounds"][&"max_x"]=99
 copy[&"walkable_cells"].clear()
 expect(world.create_snapshot()==original,"cached snapshots remain caller-owned")
 world.consume_dirty_cells()
 expect(world.create_snapshot()[&"dirty_cells"].is_empty(),"dirty consumption is reflected without geometry revision")
 world.set_walkable(Vector3i(1,0,0),true)
 world.set_excavated(Vector3i(1,-1,0),true)
 expect(world.create_snapshot()[&"walkable_cells"].size()==2 and world.create_snapshot()[&"excavation_overrides"].size()==1,"geometry mutation invalidates cache")
 var replacement:=original.duplicate(true)
 replacement[&"walkable_cells"]=[Vector3i(2,0,0)]
 expect(world.restore_snapshot(replacement),"restore valid alternate world")
 expect(world.create_snapshot()==replacement,"restore invalidates cached geometry even with reused revision")
 replacement[&"walkable_cells"]=[Vector3i(3,0,0)]
 expect(world.restore_snapshot(replacement) and world.create_snapshot()==replacement,"same-revision alternate restore cannot reuse old geometry")
 var invalid:=replacement.duplicate(true);invalid[&"schema_version"]=-1
 expect(not world.restore_snapshot(invalid) and world.create_snapshot()==replacement,"failed restore preserves cached and authoritative state")
 world.reset(bounds)
 expect(world.create_snapshot()[&"support"].is_empty() and world.create_snapshot()[&"walkable_cells"].is_empty(),"reset invalidates same-revision geometry")
 world.expand_bounds({&"min_x":0,&"max_x":8,&"min_y":-2,&"max_y":2})
 expect(world.create_snapshot()[&"bounds"][&"max_x"]==8,"expansion updates cached bounds")
 print("World snapshot cache: %d checks, %d failures"%[checks,failures]);quit(failures)