"""Wrong camera-fixture selector must fail before profile or engine setup."""
from pathlib import Path
import subprocess,sys,tempfile
ROOT=Path(__file__).resolve().parents[1]
with tempfile.TemporaryDirectory(prefix='erri-observer-selector-') as folder:
 root=Path(folder)
 result=subprocess.run([sys.executable,'-B',str(ROOT/'tools/headless_workbench.py'),
  '--steam',str(root/'missing-steam'),'--compat',str(root/'missing-prefix'),
  '--profile',str(root/'unused-profile'),'--smoke','unconscious-camera',
  '--project','chat','--rounds','1'],capture_output=True,text=True)
 assert result.returncode==2,(result.returncode,result.stdout,result.stderr)
 assert 'unconscious-camera requires --project core' in result.stderr,result.stderr
 assert not list(root.iterdir()),'Invalid selection must not create native runtime/profile files'
print('PASS: wrong observer fixture selector rejected before runtime/profile setup; no engine launched')