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Artificial-Sweetener-Simple…/tests/test_simple_load_checkpoint_node.py
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# SimpleSyrup - workflow-focused ComfyUI extensions for image generation
# Copyright (C) 2026 Artificial Sweetener and contributors
# SPDX-License-Identifier: AGPL-3.0-or-later
"""Tests for the Simple Load Checkpoint node declaration."""
from __future__ import annotations
import sys
from types import ModuleType
from typing import Any
import pytest
from simple_syrup.nodes.simple_load_checkpoint import SimpleLoadCheckpoint
from simple_syrup.runtime.checkpoint_loader import (
CLIP_SKIP_DEFAULT,
USE_CHECKPOINT_VAE_CHOICE,
)
class FakeFolderPaths(ModuleType):
"""Small folder_paths fake for checkpoint node input declarations."""
def __init__(self) -> None:
"""Create deterministic ComfyUI filename lists."""
super().__init__("folder_paths")
self.files = {
"checkpoints": ["model.safetensors"],
"vae": ["manual_vae.safetensors", USE_CHECKPOINT_VAE_CHOICE],
"vae_approx": [],
}
def get_filename_list(self, folder_name: str) -> list[str]:
"""Return deterministic filenames for a model folder."""
return self.files[folder_name]
def test_simple_load_checkpoint_contract() -> None:
"""Simple Load Checkpoint exposes MODEL, CLIP, and VAE sockets."""
assert SimpleLoadCheckpoint.RETURN_TYPES == ("MODEL", "CLIP", "VAE")
assert SimpleLoadCheckpoint.RETURN_NAMES == ("model", "clip", "vae")
assert SimpleLoadCheckpoint.FUNCTION == "load_checkpoint"
assert SimpleLoadCheckpoint.CATEGORY == "SimpleSyrup/Loaders"
def test_simple_load_checkpoint_declares_expected_inputs(
monkeypatch: pytest.MonkeyPatch,
) -> None:
"""Input declarations mirror checkpoint loading plus VAE override."""
monkeypatch.setitem(sys.modules, "folder_paths", FakeFolderPaths())
input_types: dict[str, dict[str, tuple[Any, ...]]] = (
SimpleLoadCheckpoint.INPUT_TYPES()
)
required = input_types["required"]
assert list(required) == ["ckpt_name", "vae_name", "clip_skip"]
assert required["ckpt_name"][0] == ["model.safetensors"]
assert required["vae_name"][0] == [
USE_CHECKPOINT_VAE_CHOICE,
"manual_vae.safetensors",
"pixel_space",
]
assert required["vae_name"][1]["default"] == USE_CHECKPOINT_VAE_CHOICE
assert required["clip_skip"][0] == "BOOLEAN"
assert required["clip_skip"][1]["default"] is CLIP_SKIP_DEFAULT
def test_simple_load_checkpoint_delegates_to_service() -> None:
"""Node execution delegates to the checkpoint loader service."""
class FakeService:
"""Service double for node execution."""
def __init__(self) -> None:
"""Create a recording service double."""
self.kwargs: dict[str, object] | None = None
def load_checkpoint(self, **kwargs: object) -> tuple[str, str, str]:
"""Record call arguments and return fixed outputs."""
self.kwargs = kwargs
return ("model", "clip", "vae")
fake_service = FakeService()
original = SimpleLoadCheckpoint._service
SimpleLoadCheckpoint._service = fake_service # type: ignore[assignment]
try:
result = SimpleLoadCheckpoint().load_checkpoint(
ckpt_name="model.safetensors",
vae_name=USE_CHECKPOINT_VAE_CHOICE,
clip_skip=True,
)
finally:
SimpleLoadCheckpoint._service = original
assert result == ("model", "clip", "vae")
assert fake_service.kwargs == {
"ckpt_name": "model.safetensors",
"vae_name": USE_CHECKPOINT_VAE_CHOICE,
"clip_skip": True,
}