[Refactor] Move testing utils out of src (#12238)

* update

* update

* update

* update

* update

* merge main

* Revert "merge main"

This reverts commit 65efbcead58644b31596ed2d714f7cee0e0238d3.

tests/schedulers/test_scheduler_euler_ancestral.py

 import torch
 
 from diffusers import EulerAncestralDiscreteScheduler
-from diffusers.utils.testing_utils import torch_device
 
+from ..testing_utils import torch_device
 from .test_schedulers import SchedulerCommonTest
 
 

tests/schedulers/test_scheduler_heun.py

 import torch
 
 from diffusers import HeunDiscreteScheduler
-from diffusers.utils.testing_utils import torch_device
 
+from ..testing_utils import torch_device
 from .test_schedulers import SchedulerCommonTest
 
 

tests/schedulers/test_scheduler_kdpm2_ancestral.py

 import torch
 
 from diffusers import KDPM2AncestralDiscreteScheduler
-from diffusers.utils.testing_utils import torch_device
 
+from ..testing_utils import torch_device
 from .test_schedulers import SchedulerCommonTest
 
 

tests/schedulers/test_scheduler_kdpm2_discrete.py

 import torch
 
 from diffusers import KDPM2DiscreteScheduler
-from diffusers.utils.testing_utils import torch_device
 
+from ..testing_utils import torch_device
 from .test_schedulers import SchedulerCommonTest
 
 

tests/schedulers/test_scheduler_lcm.py

@@ -4,8 +4,8 @@ from typing import Dict, List, Tuple
 import torch
 
 from diffusers import LCMScheduler
-from diffusers.utils.testing_utils import torch_device
 
+from ..testing_utils import torch_device
 from .test_schedulers import SchedulerCommonTest
 
 

tests/schedulers/test_scheduler_lms.py

 import torch
 
 from diffusers import LMSDiscreteScheduler
-from diffusers.utils.testing_utils import torch_device
 
+from ..testing_utils import torch_device
 from .test_schedulers import SchedulerCommonTest
 
 

tests/schedulers/test_scheduler_sasolver.py

 import torch
 
 from diffusers import SASolverScheduler
-from diffusers.utils.testing_utils import require_torchsde, torch_device
 
+from ..testing_utils import require_torchsde, torch_device
 from .test_schedulers import SchedulerCommonTest
 
 

tests/schedulers/test_schedulers.py

@@ -41,9 +41,9 @@ from diffusers import (
 from diffusers.configuration_utils import ConfigMixin, register_to_config
 from diffusers.schedulers.scheduling_utils import SchedulerMixin
 from diffusers.utils import logging
-from diffusers.utils.testing_utils import CaptureLogger, torch_device
 
 from ..others.test_utils import TOKEN, USER, is_staging_test
+from ..testing_utils import CaptureLogger, torch_device
 
 
 torch.backends.cuda.matmul.allow_tf32 = False

tests/single_file/single_file_testing_utils.py

@@ -7,7 +7,8 @@ from huggingface_hub import hf_hub_download, snapshot_download
 
 from diffusers.loaders.single_file_utils import _extract_repo_id_and_weights_name
 from diffusers.models.attention_processor import AttnProcessor
-from diffusers.utils.testing_utils import (
+
+from ..testing_utils import (
     numpy_cosine_similarity_distance,
     torch_device,
 )

tests/single_file/test_lumina2_transformer.py

@@ -19,7 +19,8 @@ import unittest
 from diffusers import (
     Lumina2Transformer2DModel,
 )
-from diffusers.utils.testing_utils import (
+
+from ..testing_utils import (
     backend_empty_cache,
     enable_full_determinism,
     require_torch_accelerator,

tests/single_file/test_model_autoencoder_dc_single_file.py

@@ -21,7 +21,8 @@ import torch
 from diffusers import (
     AutoencoderDC,
 )
-from diffusers.utils.testing_utils import (
+
+from ..testing_utils import (
     backend_empty_cache,
     enable_full_determinism,
     load_hf_numpy,

tests/single_file/test_model_controlnet_single_file.py

@@ -21,7 +21,8 @@ import torch
 from diffusers import (
     ControlNetModel,
 )
-from diffusers.utils.testing_utils import (
+
+from ..testing_utils import (
     backend_empty_cache,
     enable_full_determinism,
     require_torch_accelerator,

tests/single_file/test_model_flux_transformer_single_file.py

@@ -19,7 +19,8 @@ import unittest
 from diffusers import (
     FluxTransformer2DModel,
 )
-from diffusers.utils.testing_utils import (
+
+from ..testing_utils import (
     backend_empty_cache,
     enable_full_determinism,
     require_torch_accelerator,

tests/single_file/test_model_motion_adapter_single_file.py

@@ -18,7 +18,8 @@ import unittest
 from diffusers import (
     MotionAdapter,
 )
-from diffusers.utils.testing_utils import (
+
+from ..testing_utils import (
     enable_full_determinism,
 )
 

tests/single_file/test_model_sd_cascade_unet_single_file.py

@@ -20,7 +20,8 @@ import torch
 
 from diffusers import StableCascadeUNet
 from diffusers.utils import logging
-from diffusers.utils.testing_utils import (
+
+from ..testing_utils import (
     backend_empty_cache,
     enable_full_determinism,
     require_torch_accelerator,

tests/single_file/test_model_vae_single_file.py

@@ -21,7 +21,8 @@ import torch
 from diffusers import (
     AutoencoderKL,
 )
-from diffusers.utils.testing_utils import (
+
+from ..testing_utils import (
     backend_empty_cache,
     enable_full_determinism,
     load_hf_numpy,

tests/single_file/test_model_wan_autoencoder_single_file.py

@@ -19,7 +19,8 @@ import unittest
 from diffusers import (
     AutoencoderKLWan,
 )
-from diffusers.utils.testing_utils import (
+
+from ..testing_utils import (
     backend_empty_cache,
     enable_full_determinism,
     require_torch_accelerator,

tests/single_file/test_model_wan_transformer3d_single_file.py

@@ -21,7 +21,8 @@ import torch
 from diffusers import (
     WanTransformer3DModel,
 )
-from diffusers.utils.testing_utils import (
+
+from ..testing_utils import (
     backend_empty_cache,
     enable_full_determinism,
     require_big_accelerator,

tests/single_file/test_sana_transformer.py

@@ -4,7 +4,8 @@ import unittest
 from diffusers import (
     SanaTransformer2DModel,
 )
-from diffusers.utils.testing_utils import (
+
+from ..testing_utils import (
     backend_empty_cache,
     enable_full_determinism,
     require_torch_accelerator,

tests/single_file/test_stable_diffusion_controlnet_img2img_single_file.py

@@ -7,7 +7,8 @@ import torch
 from diffusers import ControlNetModel, StableDiffusionControlNetPipeline
 from diffusers.loaders.single_file_utils import _extract_repo_id_and_weights_name
 from diffusers.utils import load_image
-from diffusers.utils.testing_utils import (
+
+from ..testing_utils import (
     backend_empty_cache,
     enable_full_determinism,
     numpy_cosine_similarity_distance,
@@ -15,7 +16,6 @@ from diffusers.utils.testing_utils import (
     slow,
     torch_device,
 )
-
 from .single_file_testing_utils import (
     SDSingleFileTesterMixin,
     download_diffusers_config,