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# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved
import unittest
from collections import OrderedDict
import torch
from torch import nn
from detectron2.checkpoint.c2_model_loading import align_and_update_state_dicts
from detectron2.utils.logger import setup_logger
class TestCheckpointer(unittest.TestCase):
def setUp(self):
setup_logger()
def create_complex_model(self):
m = nn.Module()
m.block1 = nn.Module()
m.block1.layer1 = nn.Linear(2, 3)
m.layer2 = nn.Linear(3, 2)
m.res = nn.Module()
m.res.layer2 = nn.Linear(3, 2)
state_dict = OrderedDict()
state_dict["layer1.weight"] = torch.rand(3, 2)
state_dict["layer1.bias"] = torch.rand(3)
state_dict["layer2.weight"] = torch.rand(2, 3)
state_dict["layer2.bias"] = torch.rand(2)
state_dict["res.layer2.weight"] = torch.rand(2, 3)
state_dict["res.layer2.bias"] = torch.rand(2)
return m, state_dict
def test_complex_model_loaded(self):
for add_data_parallel in [False, True]:
model, state_dict = self.create_complex_model()
if add_data_parallel:
model = nn.DataParallel(model)
model_sd = model.state_dict()
align_and_update_state_dicts(model_sd, state_dict)
for loaded, stored in zip(model_sd.values(), state_dict.values()):
# different tensor references
self.assertFalse(id(loaded) == id(stored))
# same content
self.assertTrue(loaded.equal(stored))
if __name__ == "__main__":
unittest.main()
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