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import contextlib
import gzip
import os
import pathlib
import re
import tarfile
import zipfile
import pytest
import torch
import torchvision.datasets.utils as utils
from common_utils import assert_equal
from torch._utils_internal import get_file_path_2
from torchvision.datasets.folder import make_dataset
from torchvision.datasets.utils import _COMPRESSED_FILE_OPENERS
TEST_FILE = get_file_path_2(
os.path.dirname(os.path.abspath(__file__)), "assets", "encode_jpeg", "grace_hopper_517x606.jpg"
)
def patch_url_redirection(mocker, redirect_url):
class Response:
def __init__(self, url):
self.url = url
@contextlib.contextmanager
def patched_opener(*args, **kwargs):
yield Response(redirect_url)
return mocker.patch("torchvision.datasets.utils.urllib.request.urlopen", side_effect=patched_opener)
class TestDatasetsUtils:
def test_get_redirect_url(self, mocker):
url = "https://url.org"
expected_redirect_url = "https://redirect.url.org"
mock = patch_url_redirection(mocker, expected_redirect_url)
actual = utils._get_redirect_url(url)
assert actual == expected_redirect_url
assert mock.call_count == 2
call_args_1, call_args_2 = mock.call_args_list
assert call_args_1[0][0].full_url == url
assert call_args_2[0][0].full_url == expected_redirect_url
def test_get_redirect_url_max_hops_exceeded(self, mocker):
url = "https://url.org"
redirect_url = "https://redirect.url.org"
mock = patch_url_redirection(mocker, redirect_url)
with pytest.raises(RecursionError):
utils._get_redirect_url(url, max_hops=0)
assert mock.call_count == 1
assert mock.call_args[0][0].full_url == url
@pytest.mark.parametrize("use_pathlib", (True, False))
def test_check_md5(self, use_pathlib):
fpath = TEST_FILE
if use_pathlib:
fpath = pathlib.Path(fpath)
correct_md5 = "9c0bb82894bb3af7f7675ef2b3b6dcdc"
false_md5 = ""
assert utils.check_md5(fpath, correct_md5)
assert not utils.check_md5(fpath, false_md5)
def test_check_integrity(self):
existing_fpath = TEST_FILE
nonexisting_fpath = ""
correct_md5 = "9c0bb82894bb3af7f7675ef2b3b6dcdc"
false_md5 = ""
assert utils.check_integrity(existing_fpath, correct_md5)
assert not utils.check_integrity(existing_fpath, false_md5)
assert utils.check_integrity(existing_fpath)
assert not utils.check_integrity(nonexisting_fpath)
def test_get_google_drive_file_id(self):
url = "https://drive.google.com/file/d/1GO-BHUYRuvzr1Gtp2_fqXRsr9TIeYbhV/view"
expected = "1GO-BHUYRuvzr1Gtp2_fqXRsr9TIeYbhV"
actual = utils._get_google_drive_file_id(url)
assert actual == expected
def test_get_google_drive_file_id_invalid_url(self):
url = "http://www.vision.caltech.edu/visipedia-data/CUB-200-2011/CUB_200_2011.tgz"
assert utils._get_google_drive_file_id(url) is None
@pytest.mark.parametrize(
"file, expected",
[
("foo.tar.bz2", (".tar.bz2", ".tar", ".bz2")),
("foo.tar.xz", (".tar.xz", ".tar", ".xz")),
("foo.tar", (".tar", ".tar", None)),
("foo.tar.gz", (".tar.gz", ".tar", ".gz")),
("foo.tbz", (".tbz", ".tar", ".bz2")),
("foo.tbz2", (".tbz2", ".tar", ".bz2")),
("foo.tgz", (".tgz", ".tar", ".gz")),
("foo.bz2", (".bz2", None, ".bz2")),
("foo.gz", (".gz", None, ".gz")),
("foo.zip", (".zip", ".zip", None)),
("foo.xz", (".xz", None, ".xz")),
("foo.bar.tar.gz", (".tar.gz", ".tar", ".gz")),
("foo.bar.gz", (".gz", None, ".gz")),
("foo.bar.zip", (".zip", ".zip", None)),
],
)
def test_detect_file_type(self, file, expected):
assert utils._detect_file_type(file) == expected
@pytest.mark.parametrize("file", ["foo", "foo.tar.baz", "foo.bar"])
def test_detect_file_type_incompatible(self, file):
# tests detect file type for no extension, unknown compression and unknown partial extension
with pytest.raises(RuntimeError):
utils._detect_file_type(file)
@pytest.mark.parametrize("extension", [".bz2", ".gz", ".xz"])
@pytest.mark.parametrize("use_pathlib", (True, False))
def test_decompress(self, extension, tmpdir, use_pathlib):
def create_compressed(root, content="this is the content"):
file = os.path.join(root, "file")
compressed = f"{file}{extension}"
compressed_file_opener = _COMPRESSED_FILE_OPENERS[extension]
with compressed_file_opener(compressed, "wb") as fh:
fh.write(content.encode())
return compressed, file, content
compressed, file, content = create_compressed(tmpdir)
if use_pathlib:
compressed = pathlib.Path(compressed)
utils._decompress(compressed)
assert os.path.exists(file)
with open(file) as fh:
assert fh.read() == content
def test_decompress_no_compression(self):
with pytest.raises(RuntimeError):
utils._decompress("foo.tar")
@pytest.mark.parametrize("use_pathlib", (True, False))
def test_decompress_remove_finished(self, tmpdir, use_pathlib):
def create_compressed(root, content="this is the content"):
file = os.path.join(root, "file")
compressed = f"{file}.gz"
with gzip.open(compressed, "wb") as fh:
fh.write(content.encode())
return compressed, file, content
compressed, file, content = create_compressed(tmpdir)
print(f"{type(compressed)=}")
if use_pathlib:
compressed = pathlib.Path(compressed)
tmpdir = pathlib.Path(tmpdir)
extracted_dir = utils.extract_archive(compressed, tmpdir, remove_finished=True)
assert not os.path.exists(compressed)
if use_pathlib:
assert isinstance(extracted_dir, pathlib.Path)
assert isinstance(compressed, pathlib.Path)
else:
assert isinstance(extracted_dir, str)
assert isinstance(compressed, str)
@pytest.mark.parametrize("extension", [".gz", ".xz"])
@pytest.mark.parametrize("remove_finished", [True, False])
def test_extract_archive_defer_to_decompress(self, extension, remove_finished, mocker):
filename = "foo"
file = f"{filename}{extension}"
mocked = mocker.patch("torchvision.datasets.utils._decompress")
utils.extract_archive(file, remove_finished=remove_finished)
mocked.assert_called_once_with(file, filename, remove_finished=remove_finished)
@pytest.mark.parametrize("use_pathlib", (True, False))
def test_extract_zip(self, tmpdir, use_pathlib):
def create_archive(root, content="this is the content"):
file = os.path.join(root, "dst.txt")
archive = os.path.join(root, "archive.zip")
with zipfile.ZipFile(archive, "w") as zf:
zf.writestr(os.path.basename(file), content)
return archive, file, content
if use_pathlib:
tmpdir = pathlib.Path(tmpdir)
archive, file, content = create_archive(tmpdir)
utils.extract_archive(archive, tmpdir)
assert os.path.exists(file)
with open(file) as fh:
assert fh.read() == content
@pytest.mark.parametrize(
"extension, mode", [(".tar", "w"), (".tar.gz", "w:gz"), (".tgz", "w:gz"), (".tar.xz", "w:xz")]
)
@pytest.mark.parametrize("use_pathlib", (True, False))
def test_extract_tar(self, extension, mode, tmpdir, use_pathlib):
def create_archive(root, extension, mode, content="this is the content"):
src = os.path.join(root, "src.txt")
dst = os.path.join(root, "dst.txt")
archive = os.path.join(root, f"archive{extension}")
with open(src, "w") as fh:
fh.write(content)
with tarfile.open(archive, mode=mode) as fh:
fh.add(src, arcname=os.path.basename(dst))
return archive, dst, content
if use_pathlib:
tmpdir = pathlib.Path(tmpdir)
archive, file, content = create_archive(tmpdir, extension, mode)
utils.extract_archive(archive, tmpdir)
assert os.path.exists(file)
with open(file) as fh:
assert fh.read() == content
def test_verify_str_arg(self):
assert "a" == utils.verify_str_arg("a", "arg", ("a",))
pytest.raises(ValueError, utils.verify_str_arg, 0, ("a",), "arg")
pytest.raises(ValueError, utils.verify_str_arg, "b", ("a",), "arg")
@pytest.mark.parametrize(
("dtype", "actual_hex", "expected_hex"),
[
(torch.uint8, "01 23 45 67 89 AB CD EF", "01 23 45 67 89 AB CD EF"),
(torch.float16, "01 23 45 67 89 AB CD EF", "23 01 67 45 AB 89 EF CD"),
(torch.int32, "01 23 45 67 89 AB CD EF", "67 45 23 01 EF CD AB 89"),
(torch.float64, "01 23 45 67 89 AB CD EF", "EF CD AB 89 67 45 23 01"),
],
)
def test_flip_byte_order(self, dtype, actual_hex, expected_hex):
def to_tensor(hex):
return torch.frombuffer(bytes.fromhex(hex), dtype=dtype)
assert_equal(
utils._flip_byte_order(to_tensor(actual_hex)),
to_tensor(expected_hex),
)
@pytest.mark.parametrize(
("kwargs", "expected_error_msg"),
[
(dict(is_valid_file=lambda path: pathlib.Path(path).suffix in {".png", ".jpeg"}), "classes c"),
(dict(extensions=".png"), re.escape("classes b, c. Supported extensions are: .png")),
(dict(extensions=(".png", ".jpeg")), re.escape("classes c. Supported extensions are: .png, .jpeg")),
],
)
def test_make_dataset_no_valid_files(tmpdir, kwargs, expected_error_msg):
tmpdir = pathlib.Path(tmpdir)
(tmpdir / "a").mkdir()
(tmpdir / "a" / "a.png").touch()
(tmpdir / "b").mkdir()
(tmpdir / "b" / "b.jpeg").touch()
(tmpdir / "c").mkdir()
(tmpdir / "c" / "c.unknown").touch()
with pytest.raises(FileNotFoundError, match=expected_error_msg):
make_dataset(str(tmpdir), **kwargs)
if __name__ == "__main__":
pytest.main([__file__])
|
