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import pickle
import shlex
import subprocess
import time
import pytest
import fsspec
requests = pytest.importorskip("requests")
from fsspec.implementations.webhdfs import WebHDFS # noqa: E402
@pytest.fixture(scope="module")
def hdfs_cluster():
cmd0 = shlex.split("htcluster shutdown")
try:
subprocess.check_output(cmd0, stderr=subprocess.STDOUT)
except FileNotFoundError:
pytest.skip("htcluster not found")
except subprocess.CalledProcessError as ex:
pytest.skip(f"htcluster failed: {ex.output.decode()}")
cmd1 = shlex.split("htcluster startup --image base")
subprocess.check_output(cmd1)
try:
while True:
t = 90
try:
requests.get("http://localhost:50070/webhdfs/v1/?op=LISTSTATUS")
except: # noqa: E722
t -= 1
assert t > 0, "Timeout waiting for HDFS"
time.sleep(1)
continue
break
time.sleep(7)
yield "localhost"
finally:
subprocess.check_output(cmd0)
def test_pickle(hdfs_cluster):
w = WebHDFS(hdfs_cluster, user="testuser")
w2 = pickle.loads(pickle.dumps(w))
assert w == w2
def test_simple(hdfs_cluster):
w = WebHDFS(hdfs_cluster, user="testuser")
home = w.home_directory()
assert home == "/user/testuser"
with pytest.raises(PermissionError):
w.mkdir("/root")
def test_url(hdfs_cluster):
url = "webhdfs://testuser@localhost:50070/user/testuser/myfile"
fo = fsspec.open(url, "wb", data_proxy={"worker.example.com": "localhost"})
with fo as f:
f.write(b"hello")
fo = fsspec.open(url, "rb", data_proxy={"worker.example.com": "localhost"})
with fo as f:
assert f.read() == b"hello"
def test_workflow(hdfs_cluster):
w = WebHDFS(
hdfs_cluster, user="testuser", data_proxy={"worker.example.com": "localhost"}
)
fn = "/user/testuser/testrun/afile"
w.mkdir("/user/testuser/testrun")
with w.open(fn, "wb") as f:
f.write(b"hello")
assert w.exists(fn)
info = w.info(fn)
assert info["size"] == 5
assert w.isfile(fn)
assert w.cat(fn) == b"hello"
w.rm("/user/testuser/testrun", recursive=True)
assert not w.exists(fn)
def test_with_gzip(hdfs_cluster):
from gzip import GzipFile
w = WebHDFS(
hdfs_cluster, user="testuser", data_proxy={"worker.example.com": "localhost"}
)
fn = "/user/testuser/gzfile"
with w.open(fn, "wb") as f:
gf = GzipFile(fileobj=f, mode="w")
gf.write(b"hello")
gf.close()
with w.open(fn, "rb") as f:
gf = GzipFile(fileobj=f, mode="r")
assert gf.read() == b"hello"
def test_workflow_transaction(hdfs_cluster):
w = WebHDFS(
hdfs_cluster, user="testuser", data_proxy={"worker.example.com": "localhost"}
)
fn = "/user/testuser/testrun/afile"
w.mkdirs("/user/testuser/testrun")
with w.transaction:
with w.open(fn, "wb") as f:
f.write(b"hello")
assert not w.exists(fn)
assert w.exists(fn)
assert w.ukey(fn)
files = w.ls("/user/testuser/testrun", True)
summ = w.content_summary("/user/testuser/testrun")
assert summ["length"] == files[0]["size"]
assert summ["fileCount"] == 1
w.rm("/user/testuser/testrun", recursive=True)
assert not w.exists(fn)
def test_webhdfs_cp_file(hdfs_cluster):
fs = WebHDFS(
hdfs_cluster, user="testuser", data_proxy={"worker.example.com": "localhost"}
)
src, dst = "/user/testuser/testrun/f1", "/user/testuser/testrun/f2"
fs.mkdir("/user/testuser/testrun")
with fs.open(src, "wb") as f:
f.write(b"hello")
fs.cp_file(src, dst)
assert fs.exists(src)
assert fs.exists(dst)
assert fs.cat(src) == fs.cat(dst)
def test_path_with_equals(hdfs_cluster):
fs = WebHDFS(
hdfs_cluster, user="testuser", data_proxy={"worker.example.com": "localhost"}
)
path_with_equals = "/user/testuser/some_table/datestamp=2023-11-11"
fs.mkdir(path_with_equals)
result = fs.ls(path_with_equals)
assert result is not None
assert fs.exists(path_with_equals)
def test_error_handling_with_equals_in_path(hdfs_cluster):
fs = WebHDFS(hdfs_cluster, user="testuser")
invalid_path_with_equals = (
"/user/testuser/some_table/invalid_path=datestamp=2023-11-11"
)
with pytest.raises(FileNotFoundError):
fs.ls(invalid_path_with_equals)
def test_create_and_touch_file_with_equals(hdfs_cluster):
fs = WebHDFS(
hdfs_cluster,
user="testuser",
data_proxy={"worker.example.com": "localhost"},
)
base_path = "/user/testuser/some_table/datestamp=2023-11-11"
file_path = f"{base_path}/testfile.txt"
fs.mkdir(base_path)
fs.touch(file_path, "wb")
assert fs.exists(file_path)
def test_write_read_verify_file_with_equals(hdfs_cluster):
fs = WebHDFS(
hdfs_cluster,
user="testuser",
data_proxy={"worker.example.com": "localhost"},
)
base_path = "/user/testuser/some_table/datestamp=2023-11-11"
file_path = f"{base_path}/testfile.txt"
content = b"This is some content!"
fs.mkdir(base_path)
with fs.open(file_path, "wb") as f:
f.write(content)
with fs.open(file_path, "rb") as f:
assert f.read() == content
file_info = fs.ls(base_path, detail=True)
assert len(file_info) == 1
assert file_info[0]["name"] == file_path
assert file_info[0]["size"] == len(content)
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