[Tests] Add single file tester mixin for Models and remove unittest dependency (#12352)

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Author: DN6

tests/single_file/single_file_testing_utils.py

@@ -1,3 +1,4 @@
+import gc
 import tempfile
 from io import BytesIO
 
@@ -9,7 +10,10 @@
 from diffusers.models.attention_processor import AttnProcessor
 
 from ..testing_utils import (
+    backend_empty_cache,
+    nightly,
     numpy_cosine_similarity_distance,
+    require_torch_accelerator,
     torch_device,
 )
 
@@ -47,6 +51,93 @@ def download_diffusers_config(repo_id, tmpdir):
     return path
 
 
+@nightly
+@require_torch_accelerator
+class SingleFileModelTesterMixin:
+    def setup_method(self):
+        gc.collect()
+        backend_empty_cache(torch_device)
+
+    def teardown_method(self):
+        gc.collect()
+        backend_empty_cache(torch_device)
+
+    def test_single_file_model_config(self):
+        pretrained_kwargs = {}
+        single_file_kwargs = {}
+
+        if hasattr(self, "subfolder") and self.subfolder:
+            pretrained_kwargs["subfolder"] = self.subfolder
+
+        if hasattr(self, "torch_dtype") and self.torch_dtype:
+            pretrained_kwargs["torch_dtype"] = self.torch_dtype
+            single_file_kwargs["torch_dtype"] = self.torch_dtype
+
+        model = self.model_class.from_pretrained(self.repo_id, **pretrained_kwargs)
+        model_single_file = self.model_class.from_single_file(self.ckpt_path, **single_file_kwargs)
+
+        PARAMS_TO_IGNORE = ["torch_dtype", "_name_or_path", "_use_default_values", "_diffusers_version"]
+        for param_name, param_value in model_single_file.config.items():
+            if param_name in PARAMS_TO_IGNORE:
+                continue
+            assert model.config[param_name] == param_value, (
+                f"{param_name} differs between pretrained loading and single file loading"
+            )
+
+    def test_single_file_model_parameters(self):
+        pretrained_kwargs = {}
+        single_file_kwargs = {}
+
+        if hasattr(self, "subfolder") and self.subfolder:
+            pretrained_kwargs["subfolder"] = self.subfolder
+
+        if hasattr(self, "torch_dtype") and self.torch_dtype:
+            pretrained_kwargs["torch_dtype"] = self.torch_dtype
+            single_file_kwargs["torch_dtype"] = self.torch_dtype
+
+        model = self.model_class.from_pretrained(self.repo_id, **pretrained_kwargs)
+        model_single_file = self.model_class.from_single_file(self.ckpt_path, **single_file_kwargs)
+
+        state_dict = model.state_dict()
+        state_dict_single_file = model_single_file.state_dict()
+
+        assert set(state_dict.keys()) == set(state_dict_single_file.keys()), (
+            "Model parameters keys differ between pretrained and single file loading"
+        )
+
+        for key in state_dict.keys():
+            param = state_dict[key]
+            param_single_file = state_dict_single_file[key]
+
+            assert param.shape == param_single_file.shape, (
+                f"Parameter shape mismatch for {key}: "
+                f"pretrained {param.shape} vs single file {param_single_file.shape}"
+            )
+
+            assert torch.allclose(param, param_single_file, rtol=1e-5, atol=1e-5), (
+                f"Parameter values differ for {key}: "
+                f"max difference {torch.max(torch.abs(param - param_single_file)).item()}"
+            )
+
+    def test_checkpoint_altered_keys_loading(self):
+        # Test loading with checkpoints that have altered keys
+        if not hasattr(self, "alternate_keys_ckpt_paths") or not self.alternate_keys_ckpt_paths:
+            return
+
+        for ckpt_path in self.alternate_keys_ckpt_paths:
+            backend_empty_cache(torch_device)
+
+            single_file_kwargs = {}
+            if hasattr(self, "torch_dtype") and self.torch_dtype:
+                single_file_kwargs["torch_dtype"] = self.torch_dtype
+
+            model = self.model_class.from_single_file(ckpt_path, **single_file_kwargs)
+
+            del model
+            gc.collect()
+            backend_empty_cache(torch_device)
+
+
 class SDSingleFileTesterMixin:
     single_file_kwargs = {}
 

tests/single_file/test_lumina2_transformer.py

@@ -13,61 +13,26 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import gc
-import unittest
 
 from diffusers import (
     Lumina2Transformer2DModel,
 )
 
 from ..testing_utils import (
-    backend_empty_cache,
     enable_full_determinism,
-    require_torch_accelerator,
-    torch_device,
 )
+from .single_file_testing_utils import SingleFileModelTesterMixin
 
 
 enable_full_determinism()
 
 
-@require_torch_accelerator
-class Lumina2Transformer2DModelSingleFileTests(unittest.TestCase):
+class TestLumina2Transformer2DModelSingleFile(SingleFileModelTesterMixin):
     model_class = Lumina2Transformer2DModel
     ckpt_path = "https://huggingface.co/Comfy-Org/Lumina_Image_2.0_Repackaged/blob/main/split_files/diffusion_models/lumina_2_model_bf16.safetensors"
     alternate_keys_ckpt_paths = [
         "https://huggingface.co/Comfy-Org/Lumina_Image_2.0_Repackaged/blob/main/split_files/diffusion_models/lumina_2_model_bf16.safetensors"
     ]
 
     repo_id = "Alpha-VLLM/Lumina-Image-2.0"
-
-    def setUp(self):
-        super().setUp()
-        gc.collect()
-        backend_empty_cache(torch_device)
-
-    def tearDown(self):
-        super().tearDown()
-        gc.collect()
-        backend_empty_cache(torch_device)
-
-    def test_single_file_components(self):
-        model = self.model_class.from_pretrained(self.repo_id, subfolder="transformer")
-        model_single_file = self.model_class.from_single_file(self.ckpt_path)
-
-        PARAMS_TO_IGNORE = ["torch_dtype", "_name_or_path", "_use_default_values", "_diffusers_version"]
-        for param_name, param_value in model_single_file.config.items():
-            if param_name in PARAMS_TO_IGNORE:
-                continue
-            assert model.config[param_name] == param_value, (
-                f"{param_name} differs between single file loading and pretrained loading"
-            )
-
-    def test_checkpoint_loading(self):
-        for ckpt_path in self.alternate_keys_ckpt_paths:
-            backend_empty_cache(torch_device)
-            model = self.model_class.from_single_file(ckpt_path)
-
-            del model
-            gc.collect()
-            backend_empty_cache(torch_device)
+    subfolder = "transformer"

tests/single_file/test_model_autoencoder_dc_single_file.py

@@ -13,8 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import gc
-import unittest
 
 import torch
 
@@ -23,38 +21,24 @@
 )
 
 from ..testing_utils import (
-    backend_empty_cache,
     enable_full_determinism,
     load_hf_numpy,
     numpy_cosine_similarity_distance,
-    require_torch_accelerator,
-    slow,
     torch_device,
 )
+from .single_file_testing_utils import SingleFileModelTesterMixin
 
 
 enable_full_determinism()
 
 
-@slow
-@require_torch_accelerator
-class AutoencoderDCSingleFileTests(unittest.TestCase):
+class TestAutoencoderDCSingleFile(SingleFileModelTesterMixin):
     model_class = AutoencoderDC
     ckpt_path = "https://huggingface.co/mit-han-lab/dc-ae-f32c32-sana-1.0/blob/main/model.safetensors"
     repo_id = "mit-han-lab/dc-ae-f32c32-sana-1.0-diffusers"
     main_input_name = "sample"
     base_precision = 1e-2
 
-    def setUp(self):
-        super().setUp()
-        gc.collect()
-        backend_empty_cache(torch_device)
-
-    def tearDown(self):
-        super().tearDown()
-        gc.collect()
-        backend_empty_cache(torch_device)
-
     def get_file_format(self, seed, shape):
         return f"gaussian_noise_s={seed}_shape={'_'.join([str(s) for s in shape])}.npy"
 
@@ -80,18 +64,6 @@ def test_single_file_inference_same_as_pretrained(self):
 
         assert numpy_cosine_similarity_distance(output_slice_1, output_slice_2) < 1e-4
 
-    def test_single_file_components(self):
-        model = self.model_class.from_pretrained(self.repo_id)
-        model_single_file = self.model_class.from_single_file(self.ckpt_path)
-
-        PARAMS_TO_IGNORE = ["torch_dtype", "_name_or_path", "_use_default_values", "_diffusers_version"]
-        for param_name, param_value in model_single_file.config.items():
-            if param_name in PARAMS_TO_IGNORE:
-                continue
-            assert model.config[param_name] == param_value, (
-                f"{param_name} differs between pretrained loading and single file loading"
-            )
-
     def test_single_file_in_type_variant_components(self):
         # `in` variant checkpoints require passing in a `config` parameter
         # in order to set the scaling factor correctly.

tests/single_file/test_model_controlnet_single_file.py

@@ -13,8 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import gc
-import unittest
 
 import torch
 
@@ -23,46 +21,19 @@
 )
 
 from ..testing_utils import (
-    backend_empty_cache,
     enable_full_determinism,
-    require_torch_accelerator,
-    slow,
-    torch_device,
 )
+from .single_file_testing_utils import SingleFileModelTesterMixin
 
 
 enable_full_determinism()
 
 
-@slow
-@require_torch_accelerator
-class ControlNetModelSingleFileTests(unittest.TestCase):
+class TestControlNetModelSingleFile(SingleFileModelTesterMixin):
     model_class = ControlNetModel
     ckpt_path = "https://huggingface.co/lllyasviel/ControlNet-v1-1/blob/main/control_v11p_sd15_canny.pth"
     repo_id = "lllyasviel/control_v11p_sd15_canny"
 
-    def setUp(self):
-        super().setUp()
-        gc.collect()
-        backend_empty_cache(torch_device)
-
-    def tearDown(self):
-        super().tearDown()
-        gc.collect()
-        backend_empty_cache(torch_device)
-
-    def test_single_file_components(self):
-        model = self.model_class.from_pretrained(self.repo_id)
-        model_single_file = self.model_class.from_single_file(self.ckpt_path)
-
-        PARAMS_TO_IGNORE = ["torch_dtype", "_name_or_path", "_use_default_values", "_diffusers_version"]
-        for param_name, param_value in model_single_file.config.items():
-            if param_name in PARAMS_TO_IGNORE:
-                continue
-            assert model.config[param_name] == param_value, (
-                f"{param_name} differs between single file loading and pretrained loading"
-            )
-
     def test_single_file_arguments(self):
         model_default = self.model_class.from_single_file(self.ckpt_path)
 

tests/single_file/test_model_flux_transformer_single_file.py

@@ -14,7 +14,6 @@
 # limitations under the License.
 
 import gc
-import unittest
 
 from diffusers import (
     FluxTransformer2DModel,
@@ -23,52 +22,21 @@
 from ..testing_utils import (
     backend_empty_cache,
     enable_full_determinism,
-    require_torch_accelerator,
     torch_device,
 )
+from .single_file_testing_utils import SingleFileModelTesterMixin
 
 
 enable_full_determinism()
 
 
-@require_torch_accelerator
-class FluxTransformer2DModelSingleFileTests(unittest.TestCase):
+class TestFluxTransformer2DModelSingleFile(SingleFileModelTesterMixin):
     model_class = FluxTransformer2DModel
     ckpt_path = "https://huggingface.co/black-forest-labs/FLUX.1-dev/blob/main/flux1-dev.safetensors"
     alternate_keys_ckpt_paths = ["https://huggingface.co/Comfy-Org/flux1-dev/blob/main/flux1-dev-fp8.safetensors"]
 
     repo_id = "black-forest-labs/FLUX.1-dev"
-
-    def setUp(self):
-        super().setUp()
-        gc.collect()
-        backend_empty_cache(torch_device)
-
-    def tearDown(self):
-        super().tearDown()
-        gc.collect()
-        backend_empty_cache(torch_device)
-
-    def test_single_file_components(self):
-        model = self.model_class.from_pretrained(self.repo_id, subfolder="transformer")
-        model_single_file = self.model_class.from_single_file(self.ckpt_path)
-
-        PARAMS_TO_IGNORE = ["torch_dtype", "_name_or_path", "_use_default_values", "_diffusers_version"]
-        for param_name, param_value in model_single_file.config.items():
-            if param_name in PARAMS_TO_IGNORE:
-                continue
-            assert model.config[param_name] == param_value, (
-                f"{param_name} differs between single file loading and pretrained loading"
-            )
-
-    def test_checkpoint_loading(self):
-        for ckpt_path in self.alternate_keys_ckpt_paths:
-            backend_empty_cache(torch_device)
-            model = self.model_class.from_single_file(ckpt_path)
-
-            del model
-            gc.collect()
-            backend_empty_cache(torch_device)
+    subfolder = "transformer"
 
     def test_device_map_cuda(self):
         backend_empty_cache(torch_device)

tests/single_file/test_model_motion_adapter_single_file.py

@@ -13,7 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import unittest
 
 from diffusers import (
     MotionAdapter,
@@ -27,7 +26,7 @@
 enable_full_determinism()
 
 
-class MotionAdapterSingleFileTests(unittest.TestCase):
+class MotionAdapterSingleFileTests:
     model_class = MotionAdapter
 
     def test_single_file_components_version_v1_5(self):