69 lines
2.3 KiB
Python
69 lines
2.3 KiB
Python
# Copyright The PyTorch Lightning team.
|
|
#
|
|
# 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.
|
|
from unittest.mock import Mock
|
|
|
|
import pytest
|
|
from torch.utils.data import DataLoader
|
|
|
|
from pytorch_lightning import Trainer
|
|
from pytorch_lightning.trainer.connectors.data_connector import _DataLoaderSource
|
|
from tests.helpers import BoringDataModule, BoringModel
|
|
|
|
|
|
class NoDataLoaderModel(BoringModel):
|
|
def __init__(self):
|
|
super().__init__()
|
|
self.train_dataloader = None
|
|
self.val_dataloader = None
|
|
self.test_dataloader = None
|
|
self.predict_dataloader = None
|
|
|
|
|
|
@pytest.mark.parametrize(
|
|
"instance,available",
|
|
[
|
|
(None, True),
|
|
(BoringModel().train_dataloader(), True),
|
|
(BoringModel(), True),
|
|
(NoDataLoaderModel(), False),
|
|
(BoringDataModule(), True),
|
|
],
|
|
)
|
|
def test_dataloader_source_available(instance, available):
|
|
"""Test the availability check for _DataLoaderSource."""
|
|
source = _DataLoaderSource(instance=instance, name="train_dataloader")
|
|
assert source.is_defined() is available
|
|
|
|
|
|
def test_dataloader_source_direct_access():
|
|
"""Test requesting a dataloader when the source is already a dataloader."""
|
|
dataloader = BoringModel().train_dataloader()
|
|
source = _DataLoaderSource(instance=dataloader, name="any")
|
|
assert not source.is_module()
|
|
assert source.is_defined()
|
|
assert source.dataloader() is dataloader
|
|
|
|
|
|
def test_dataloader_source_request_from_module():
|
|
"""Test requesting a dataloader from a module works."""
|
|
module = BoringModel()
|
|
module.trainer = Trainer()
|
|
module.foo = Mock(return_value=module.train_dataloader())
|
|
|
|
source = _DataLoaderSource(module, "foo")
|
|
assert source.is_module()
|
|
module.foo.assert_not_called()
|
|
assert isinstance(source.dataloader(), DataLoader)
|
|
module.foo.assert_called_once()
|