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test: fix pylint errors in u_boot_utils.py

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* there is no os.path.unlink() method
* don't inherit from object
* add module docstring
* move imports to the top
* avoid unused variable

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Heinrich Schuchardt 2021-11-23 00:01:47 +01:00
parent 67e9b64701
commit 9aa1a14d13
1 changed files with 14 additions and 11 deletions
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25
test/py/u_boot_utils.py
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@ -1,17 +1,20 @@
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
# Utility code shared across multiple tests.
"""
Utility code shared across multiple tests.
"""
import hashlib
import inspect
import os
import os.path
import pytest
import pathlib
import signal
import sys
import time
import re
import pytest
def md5sum_data(data):
"""Calculate the MD5 hash of some data.
@ -48,7 +51,7 @@ def md5sum_file(fn, max_length=None):
data = fh.read(*params)
return md5sum_data(data)
class PersistentRandomFile(object):
class PersistentRandomFile:
"""Generate and store information about a persistent file containing
random data."""
@ -144,7 +147,7 @@ def wait_until_file_open_fails(fn, ignore_errors):
Nothing.
"""
for i in range(100):
for _ in range(100):
fh = attempt_to_open_file(fn)
if not fh:
return
@ -192,9 +195,9 @@ def run_and_log_expect_exception(u_boot_console, cmd, retcode, msg):
try:
runner = u_boot_console.log.get_runner(cmd[0], sys.stdout)
runner.run(cmd)
except Exception as e:
assert(retcode == runner.exit_status)
assert(msg in runner.output)
except Exception:
assert retcode == runner.exit_status
assert msg in runner.output
else:
raise Exception("Expected an exception with retcode %d message '%s',"
"but it was not raised" % (retcode, msg))
@ -279,17 +282,17 @@ class PersistentFileHelperCtxMgr(object):
if filename_timestamp < self.module_timestamp:
self.log.action('Removing stale generated file ' +
self.filename)
os.unlink(self.filename)
pathlib.Path(self.filename).unlink()
def __exit__(self, extype, value, traceback):
if extype:
try:
os.path.unlink(self.filename)
except:
pathlib.Path(self.filename).unlink()
except Exception:
pass
return
logged = False
for i in range(20):
for _ in range(20):
filename_timestamp = os.path.getmtime(self.filename)
if filename_timestamp > self.module_timestamp:
break