# coding=utf-8 # Copyright 2022 HuggingFace Inc. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import inspect import tempfile import unittest from typing import Dict, List, Tuple import numpy as np import torch from diffusers.modeling_utils import ModelMixin from diffusers.training_utils import EMAModel from diffusers.utils import torch_device class ModelTesterMixin: def test_from_pretrained_save_pretrained(self): init_dict, inputs_dict = self.prepare_init_args_and_inputs_for_common() model = self.model_class(**init_dict) model.to(torch_device) model.eval() with tempfile.TemporaryDirectory() as tmpdirname: model.save_pretrained(tmpdirname) new_model = self.model_class.from_pretrained(tmpdirname) new_model.to(torch_device) with torch.no_grad(): # Warmup pass when using mps (see #372) if torch_device == "mps" and isinstance(model, ModelMixin): _ = model(**self.dummy_input) _ = new_model(**self.dummy_input) image = model(**inputs_dict) if isinstance(image, dict): image = image.sample new_image = new_model(**inputs_dict) if isinstance(new_image, dict): new_image = new_image.sample max_diff = (image - new_image).abs().sum().item() self.assertLessEqual(max_diff, 5e-5, "Models give different forward passes") def test_determinism(self): init_dict, inputs_dict = self.prepare_init_args_and_inputs_for_common() model = self.model_class(**init_dict) model.to(torch_device) model.eval() with torch.no_grad(): # Warmup pass when using mps (see #372) if torch_device == "mps" and isinstance(model, ModelMixin): model(**self.dummy_input) first = model(**inputs_dict) if isinstance(first, dict): first = first.sample second = model(**inputs_dict) if isinstance(second, dict): second = second.sample out_1 = first.cpu().numpy() out_2 = second.cpu().numpy() out_1 = out_1[~np.isnan(out_1)] out_2 = out_2[~np.isnan(out_2)] max_diff = np.amax(np.abs(out_1 - out_2)) self.assertLessEqual(max_diff, 1e-5) def test_output(self): init_dict, inputs_dict = self.prepare_init_args_and_inputs_for_common() model = self.model_class(**init_dict) model.to(torch_device) model.eval() with torch.no_grad(): output = model(**inputs_dict) if isinstance(output, dict): output = output.sample self.assertIsNotNone(output) expected_shape = inputs_dict["sample"].shape self.assertEqual(output.shape, expected_shape, "Input and output shapes do not match") def test_forward_with_norm_groups(self): init_dict, inputs_dict = self.prepare_init_args_and_inputs_for_common() init_dict["norm_num_groups"] = 16 init_dict["block_out_channels"] = (16, 32) model = self.model_class(**init_dict) model.to(torch_device) model.eval() with torch.no_grad(): output = model(**inputs_dict) if isinstance(output, dict): output = output.sample self.assertIsNotNone(output) expected_shape = inputs_dict["sample"].shape self.assertEqual(output.shape, expected_shape, "Input and output shapes do not match") def test_forward_signature(self): init_dict, _ = self.prepare_init_args_and_inputs_for_common() model = self.model_class(**init_dict) signature = inspect.signature(model.forward) # signature.parameters is an OrderedDict => so arg_names order is deterministic arg_names = [*signature.parameters.keys()] expected_arg_names = ["sample", "timestep"] self.assertListEqual(arg_names[:2], expected_arg_names) def test_model_from_config(self): init_dict, inputs_dict = self.prepare_init_args_and_inputs_for_common() model = self.model_class(**init_dict) model.to(torch_device) model.eval() # test if the model can be loaded from the config # and has all the expected shape with tempfile.TemporaryDirectory() as tmpdirname: model.save_config(tmpdirname) new_model = self.model_class.from_config(tmpdirname) new_model.to(torch_device) new_model.eval() # check if all parameters shape are the same for param_name in model.state_dict().keys(): param_1 = model.state_dict()[param_name] param_2 = new_model.state_dict()[param_name] self.assertEqual(param_1.shape, param_2.shape) with torch.no_grad(): output_1 = model(**inputs_dict) if isinstance(output_1, dict): output_1 = output_1.sample output_2 = new_model(**inputs_dict) if isinstance(output_2, dict): output_2 = output_2.sample self.assertEqual(output_1.shape, output_2.shape) @unittest.skipIf(torch_device == "mps", "Training is not supported in mps") def test_training(self): init_dict, inputs_dict = self.prepare_init_args_and_inputs_for_common() model = self.model_class(**init_dict) model.to(torch_device) model.train() output = model(**inputs_dict) if isinstance(output, dict): output = output.sample noise = torch.randn((inputs_dict["sample"].shape[0],) + self.output_shape).to(torch_device) loss = torch.nn.functional.mse_loss(output, noise) loss.backward() @unittest.skipIf(torch_device == "mps", "Training is not supported in mps") def test_ema_training(self): init_dict, inputs_dict = self.prepare_init_args_and_inputs_for_common() model = self.model_class(**init_dict) model.to(torch_device) model.train() ema_model = EMAModel(model, device=torch_device) output = model(**inputs_dict) if isinstance(output, dict): output = output.sample noise = torch.randn((inputs_dict["sample"].shape[0],) + self.output_shape).to(torch_device) loss = torch.nn.functional.mse_loss(output, noise) loss.backward() ema_model.step(model) def test_outputs_equivalence(self): def set_nan_tensor_to_zero(t): # Temporary fallback until `aten::_index_put_impl_` is implemented in mps # Track progress in https://github.com/pytorch/pytorch/issues/77764 device = t.device if device.type == "mps": t = t.to("cpu") t[t != t] = 0 return t.to(device) def recursive_check(tuple_object, dict_object): if isinstance(tuple_object, (List, Tuple)): for tuple_iterable_value, dict_iterable_value in zip(tuple_object, dict_object.values()): recursive_check(tuple_iterable_value, dict_iterable_value) elif isinstance(tuple_object, Dict): for tuple_iterable_value, dict_iterable_value in zip(tuple_object.values(), dict_object.values()): recursive_check(tuple_iterable_value, dict_iterable_value) elif tuple_object is None: return else: self.assertTrue( torch.allclose( set_nan_tensor_to_zero(tuple_object), set_nan_tensor_to_zero(dict_object), atol=1e-5 ), msg=( "Tuple and dict output are not equal. Difference:" f" {torch.max(torch.abs(tuple_object - dict_object))}. Tuple has `nan`:" f" {torch.isnan(tuple_object).any()} and `inf`: {torch.isinf(tuple_object)}. Dict has" f" `nan`: {torch.isnan(dict_object).any()} and `inf`: {torch.isinf(dict_object)}." ), ) init_dict, inputs_dict = self.prepare_init_args_and_inputs_for_common() model = self.model_class(**init_dict) model.to(torch_device) model.eval() with torch.no_grad(): # Warmup pass when using mps (see #372) if torch_device == "mps" and isinstance(model, ModelMixin): model(**self.dummy_input) outputs_dict = model(**inputs_dict) outputs_tuple = model(**inputs_dict, return_dict=False) recursive_check(outputs_tuple, outputs_dict) @unittest.skipIf(torch_device == "mps", "Gradient checkpointing skipped on MPS") def test_enable_disable_gradient_checkpointing(self): if not self.model_class._supports_gradient_checkpointing: return # Skip test if model does not support gradient checkpointing init_dict, _ = self.prepare_init_args_and_inputs_for_common() # at init model should have gradient checkpointing disabled model = self.model_class(**init_dict) self.assertFalse(model.is_gradient_checkpointing) # check enable works model.enable_gradient_checkpointing() self.assertTrue(model.is_gradient_checkpointing) # check disable works model.disable_gradient_checkpointing() self.assertFalse(model.is_gradient_checkpointing)