fix: tests import the pack without ComfyUI

pytest imports the pack root while collecting, before any fixture runs, so the
comfy_api stand-in is installed when conftest loads and __init__ falls back to
an absolute import outside a package, as in WarpPipe.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

__init__.py

@@ -1,3 +1,7 @@
-from .realism import comfy_entrypoint
+if __package__:
+    from .realism import comfy_entrypoint
+else:
+    # pytest imports the pack root as a plain module
+    from realism import comfy_entrypoint
 
 __all__ = ["comfy_entrypoint"]

tests/conftest.py

@@ -43,16 +43,20 @@ io = types.SimpleNamespace(
 )
 
 
+# installed at import time: pytest imports the pack's __init__.py while collecting, before any fixture runs
+_latest = types.ModuleType("comfy_api.latest")
+_latest.ComfyExtension = type("ComfyExtension", (), {})
+_latest.io = io
+_comfy_api = types.ModuleType("comfy_api")
+_comfy_api.__path__ = []
+_comfy_api.latest = _latest
+sys.modules.setdefault("comfy_api", _comfy_api)
+sys.modules.setdefault("comfy_api.latest", _latest)
+sys.path.insert(0, str(PROJECT_ROOT))
+
+
 @pytest.fixture(scope="session")
 def realism():
-    latest = types.ModuleType("comfy_api.latest")
-    latest.ComfyExtension = type("ComfyExtension", (), {})
-    latest.io = io
-    comfy_api = types.ModuleType("comfy_api")
-    comfy_api.__path__ = []
-    comfy_api.latest = latest
-    sys.modules["comfy_api"] = comfy_api
-    sys.modules["comfy_api.latest"] = latest
     spec = importlib.util.spec_from_file_location("realism", PROJECT_ROOT / "realism.py")
     module = importlib.util.module_from_spec(spec)
     spec.loader.exec_module(module)