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import secrets
import pytest
pyarrow_fs = pytest.importorskip("pyarrow.fs")
FileSystem = pyarrow_fs.FileSystem
from fsspec.implementations.arrow import ArrowFSWrapper, HadoopFileSystem # noqa
@pytest.fixture(scope="function")
def fs():
fs, _ = FileSystem.from_uri("mock://")
return ArrowFSWrapper(fs)
@pytest.fixture(scope="function", params=[False, True])
def remote_dir(fs, request):
directory = secrets.token_hex(16)
fs.makedirs(directory)
yield ("hdfs://" if request.param else "/") + directory
fs.rm(directory, recursive=True)
def test_protocol():
fs, _ = FileSystem.from_uri("mock://")
fss = ArrowFSWrapper(fs)
assert fss.protocol == "mock"
def strip_keys(original_entry):
entry = original_entry.copy()
entry.pop("mtime")
return entry
def test_strip(fs):
assert fs._strip_protocol("/a/file") == "/a/file"
assert fs._strip_protocol("hdfs:///a/file") == "/a/file"
assert fs._strip_protocol("hdfs://1.1.1.1/a/file") == "/a/file"
assert fs._strip_protocol("hdfs://1.1.1.1:8888/a/file") == "/a/file"
def test_info(fs, remote_dir):
fs.touch(remote_dir + "/a.txt")
remote_dir_strip_protocol = fs._strip_protocol(remote_dir)
details = fs.info(remote_dir + "/a.txt")
assert details["type"] == "file"
assert details["name"] == remote_dir_strip_protocol + "/a.txt"
assert details["size"] == 0
fs.mkdir(remote_dir + "/dir")
details = fs.info(remote_dir + "/dir")
assert details["type"] == "directory"
assert details["name"] == remote_dir_strip_protocol + "/dir"
details = fs.info(remote_dir + "/dir/")
assert details["name"] == remote_dir_strip_protocol + "/dir/"
def test_move(fs, remote_dir):
fs.touch(remote_dir + "/a.txt")
initial_info = fs.info(remote_dir + "/a.txt")
fs.move(remote_dir + "/a.txt", remote_dir + "/b.txt")
secondary_info = fs.info(remote_dir + "/b.txt")
assert not fs.exists(remote_dir + "/a.txt")
assert fs.exists(remote_dir + "/b.txt")
initial_info.pop("name")
secondary_info.pop("name")
assert initial_info == secondary_info
def test_move_recursive(fs, remote_dir):
src = remote_dir + "/src"
dest = remote_dir + "/dest"
assert fs.isdir(src) is False
fs.mkdir(src)
assert fs.isdir(src)
fs.touch(src + "/a.txt")
fs.mkdir(src + "/b")
fs.touch(src + "/b/c.txt")
fs.move(src, dest, recursive=True)
assert fs.isdir(src) is False
assert not fs.exists(src)
assert fs.isdir(dest)
assert fs.exists(dest)
assert fs.cat(dest + "/b/c.txt") == fs.cat(dest + "/a.txt") == b""
def test_copy(fs, remote_dir):
fs.touch(remote_dir + "/a.txt")
initial_info = fs.info(remote_dir + "/a.txt")
fs.copy(remote_dir + "/a.txt", remote_dir + "/b.txt")
secondary_info = fs.info(remote_dir + "/b.txt")
assert fs.exists(remote_dir + "/a.txt")
assert fs.exists(remote_dir + "/b.txt")
initial_info.pop("name")
secondary_info.pop("name")
assert strip_keys(initial_info) == strip_keys(secondary_info)
def test_rm(fs, remote_dir):
fs.touch(remote_dir + "/a.txt")
fs.rm(remote_dir + "/a.txt", recursive=True)
assert not fs.exists(remote_dir + "/a.txt")
fs.mkdir(remote_dir + "/dir")
fs.rm(remote_dir + "/dir", recursive=True)
assert not fs.exists(remote_dir + "/dir")
fs.mkdir(remote_dir + "/dir")
fs.touch(remote_dir + "/dir/a")
fs.touch(remote_dir + "/dir/b")
fs.mkdir(remote_dir + "/dir/c/")
fs.touch(remote_dir + "/dir/c/a")
fs.rm(remote_dir + "/dir", recursive=True)
assert not fs.exists(remote_dir + "/dir")
def test_ls(fs, remote_dir):
if remote_dir != "/":
remote_dir = remote_dir + "/"
remote_dir_strip_protocol = fs._strip_protocol(remote_dir)
fs.mkdir(remote_dir + "dir/")
files = set()
for no in range(8):
file = remote_dir + f"dir/test_{no}"
# we also want to make sure `fs.touch` works with protocol
fs.touch(file)
files.add(remote_dir_strip_protocol + f"dir/test_{no}")
assert set(fs.ls(remote_dir + "dir/")) == files
dirs = fs.ls(remote_dir + "dir/", detail=True)
expected = [fs.info(file) for file in files]
by_name = lambda details: details["name"]
dirs.sort(key=by_name)
expected.sort(key=by_name)
assert dirs == expected
def test_mkdir(fs, remote_dir):
if remote_dir != "/":
remote_dir = remote_dir + "/"
fs.mkdir(remote_dir + "dir/")
assert fs.isdir(remote_dir + "dir/")
assert len(fs.ls(remote_dir + "dir/")) == 0
fs.mkdir(remote_dir + "dir/sub", create_parents=False)
assert fs.isdir(remote_dir + "dir/sub")
def test_makedirs(fs, remote_dir):
fs.makedirs(remote_dir + "dir/a/b/c/")
assert fs.isdir(remote_dir + "dir/a/b/c/")
assert fs.isdir(remote_dir + "dir/a/b/")
assert fs.isdir(remote_dir + "dir/a/")
fs.makedirs(remote_dir + "dir/a/b/c/", exist_ok=True)
def test_exceptions(fs, remote_dir):
with pytest.raises(FileNotFoundError):
with fs.open(remote_dir + "/a.txt"):
...
with pytest.raises(FileNotFoundError):
fs.copy(remote_dir + "/u.txt", remote_dir + "/y.txt")
def test_open_rw(fs, remote_dir):
data = b"dvc.org"
with fs.open(remote_dir + "/a.txt", "wb") as stream:
stream.write(data)
with fs.open(remote_dir + "/a.txt") as stream:
assert stream.read() == data
def test_open_rw_flush(fs, remote_dir):
data = b"dvc.org"
with fs.open(remote_dir + "/b.txt", "wb") as stream:
for _ in range(200):
stream.write(data)
stream.write(data)
stream.flush()
with fs.open(remote_dir + "/b.txt", "rb") as stream:
assert stream.read() == data * 400
def test_open_append(fs, remote_dir):
data = b"dvc.org"
with fs.open(remote_dir + "/a.txt", "wb") as stream:
stream.write(data)
with fs.open(remote_dir + "/a.txt", "ab") as stream:
stream.write(data)
with fs.open(remote_dir + "/a.txt") as stream:
assert stream.read() == 2 * data
def test_open_seekable(fs, remote_dir):
data = b"dvc.org"
with fs.open(remote_dir + "/a.txt", "wb") as stream:
stream.write(data)
with fs.open(remote_dir + "/a.txt", "rb", seekable=True) as file:
file.seek(2)
assert file.read() == data[2:]
def test_seekable(fs, remote_dir):
data = b"dvc.org"
with fs.open(remote_dir + "/a.txt", "wb") as stream:
stream.write(data)
for seekable in [True, False]:
with fs.open(remote_dir + "/a.txt", "rb", seekable=seekable) as file:
assert file.seekable() == seekable
assert file.read() == data
with fs.open(remote_dir + "/a.txt", "rb", seekable=False) as file:
with pytest.raises(OSError):
file.seek(5)
def test_get_kwargs_from_urls_hadoop_fs():
kwargs = HadoopFileSystem._get_kwargs_from_urls(
"hdfs://user@localhost:8020/?replication=2"
)
assert kwargs["user"] == "user"
assert kwargs["host"] == "localhost"
assert kwargs["port"] == 8020
assert kwargs["replication"] == 2
kwargs = HadoopFileSystem._get_kwargs_from_urls("hdfs://user@localhost:8020/")
assert kwargs["user"] == "user"
assert kwargs["host"] == "localhost"
assert kwargs["port"] == 8020
assert "replication" not in kwargs
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