6a3f210375
Changes:
- list() declarations replaced with []
- dict() declarations replaced with {}
- Added N351 to hacking for literal rule along with checks, test hacking, and to readme
- Minor fix to incorrect path in hacking guidelines pointing to test_hacking.py
Change-Id: Ie7b9201d61b6f2024217b6f4117605eb52fa916a
Closes-Bug: #1437515
369 lines
12 KiB
Python
369 lines
12 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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Guidelines for writing new hacking checks
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- Use only for Rally specific tests. OpenStack general tests
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should be submitted to the common 'hacking' module.
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- Pick numbers in the range N3xx. Find the current test with
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the highest allocated number and then pick the next value.
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- Keep the test method code in the source file ordered based
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on the N3xx value.
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- List the new rule in the top level HACKING.rst file
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- Add test cases for each new rule to tests/unit/test_hacking.py
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"""
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import functools
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import re
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re_assert_true_instance = re.compile(
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r"(.)*assertTrue\(isinstance\((\w|\.|\'|\"|\[|\])+, "
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r"(\w|\.|\'|\"|\[|\])+\)\)")
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re_assert_equal_type = re.compile(
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r"(.)*assertEqual\(type\((\w|\.|\'|\"|\[|\])+\), "
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r"(\w|\.|\'|\"|\[|\])+\)")
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re_assert_equal_end_with_none = re.compile(r"assertEqual\(.*?,\s+None\)$")
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re_assert_equal_start_with_none = re.compile(r"assertEqual\(None,")
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re_assert_true_false_with_in_or_not_in = re.compile(
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r"assert(True|False)\("
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r"(\w|[][.'\"])+( not)? in (\w|[][.'\",])+(, .*)?\)")
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re_assert_true_false_with_in_or_not_in_spaces = re.compile(
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r"assert(True|False)\((\w|[][.'\"])+( not)? in [\[|'|\"](\w|[][.'\", ])+"
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r"[\[|'|\"](, .*)?\)")
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re_assert_equal_in_end_with_true_or_false = re.compile(
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r"assertEqual\((\w|[][.'\"])+( not)? in (\w|[][.'\", ])+, (True|False)\)")
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re_assert_equal_in_start_with_true_or_false = re.compile(
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r"assertEqual\((True|False), (\w|[][.'\"])+( not)? in (\w|[][.'\", ])+\)")
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re_no_construct_dict = re.compile(
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r"=\sdict\(\)")
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re_no_construct_list = re.compile(
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r"=\slist\(\)")
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def skip_ignored_lines(func):
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@functools.wraps(func)
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def wrapper(logical_line, filename):
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line = logical_line.strip()
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if not line or line.startswith("#") or line.endswith("# noqa"):
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return
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yield next(func(logical_line, filename))
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return wrapper
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def _parse_assert_mock_str(line):
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point = line.find(".assert_")
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if point != -1:
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end_pos = line[point:].find("(") + point
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return point, line[point + 1: end_pos], line[: point]
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else:
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return None, None, None
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@skip_ignored_lines
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def check_assert_methods_from_mock(logical_line, filename):
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"""Ensure that ``assert_*`` methods from ``mock`` library is used correctly
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N301 - base error number
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N302 - related to nonexistent "assert_called"
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N303 - related to nonexistent "assert_called_once"
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"""
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correct_names = ["assert_any_call", "assert_called_once_with",
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"assert_called_with", "assert_has_calls"]
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ignored_files = ["./tests/unit/test_hacking.py"]
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if filename.startswith("./tests") and filename not in ignored_files:
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pos, method_name, obj_name = _parse_assert_mock_str(logical_line)
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if pos:
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if method_name not in correct_names:
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error_number = "N301"
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msg = ("%(error_number)s:'%(method)s' is not present in `mock`"
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" library. %(custom_msg)s For more details, visit "
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"http://www.voidspace.org.uk/python/mock/ .")
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if method_name == "assert_called":
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error_number = "N302"
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custom_msg = ("Maybe, you should try to use "
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"'assertTrue(%s.called)' instead." %
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obj_name)
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elif method_name == "assert_called_once":
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# For more details, see a bug in Rally:
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# https://bugs.launchpad.net/rally/+bug/1305991
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error_number = "N303"
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custom_msg = ("Maybe, you should try to use "
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"'assertEqual(1, %(obj_name)s.call_count)' "
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"or '%(obj_name)s.assert_called_once_with()'"
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" instead." % {"obj_name": obj_name})
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else:
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custom_msg = ("Correct 'assert_*' methods: '%s'."
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% "', '".join(correct_names))
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yield (pos, msg % {
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"error_number": error_number,
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"method": method_name,
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"custom_msg": custom_msg})
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@skip_ignored_lines
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def check_import_of_logging(logical_line, filename):
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"""Check correctness import of logging module
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N310
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"""
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excluded_files = ["./rally/common/log.py", "./tests/unit/test_log.py"]
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forbidden_imports = ["from oslo_log",
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"import oslo_log",
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"import logging"]
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if filename not in excluded_files:
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for forbidden_import in forbidden_imports:
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if logical_line.startswith(forbidden_import):
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yield (0, "N310 Wrong module for logging is imported. Please "
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"use `rally.common.log` instead.")
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@skip_ignored_lines
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def no_translate_debug_logs(logical_line, filename):
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"""Check for "LOG.debug(_("
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As per our translation policy,
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https://wiki.openstack.org/wiki/LoggingStandards#Log_Translation
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we shouldn't translate debug level logs.
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* This check assumes that 'LOG' is a logger.
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* Use filename so we can start enforcing this in specific folders instead
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of needing to do so all at once.
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N311
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"""
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if logical_line.startswith("LOG.debug(_("):
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yield(0, "N311 Don't translate debug level logs")
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@skip_ignored_lines
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def no_use_conf_debug_check(logical_line, filename):
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"""Check for "cfg.CONF.debug"
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Rally has two DEBUG level:
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- Full DEBUG, which include all debug-messages from all OpenStack services
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- Rally DEBUG, which include only Rally debug-messages
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so we should use custom check to know debug-mode, instead of CONF.debug
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N312
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"""
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excluded_files = ["./rally/common/log.py"]
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point = logical_line.find("CONF.debug")
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if point != -1 and filename not in excluded_files:
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yield(point, "N312 Don't use `CONF.debug`. "
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"Function `rally.common.log.is_debug` "
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"should be used instead.")
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@skip_ignored_lines
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def assert_true_instance(logical_line, filename):
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"""Check for assertTrue(isinstance(a, b)) sentences
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N320
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"""
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if re_assert_true_instance.match(logical_line):
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yield (0, "N320 assertTrue(isinstance(a, b)) sentences not allowed, "
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"you should use assertIsInstance(a, b) instead.")
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@skip_ignored_lines
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def assert_equal_type(logical_line, filename):
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"""Check for assertEqual(type(A), B) sentences
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N321
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"""
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if re_assert_equal_type.match(logical_line):
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yield (0, "N321 assertEqual(type(A), B) sentences not allowed, "
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"you should use assertIsInstance(a, b) instead.")
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@skip_ignored_lines
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def assert_equal_none(logical_line, filename):
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"""Check for assertEqual(A, None) or assertEqual(None, A) sentences
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N322
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"""
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res = (re_assert_equal_start_with_none.search(logical_line) or
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re_assert_equal_end_with_none.search(logical_line))
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if res:
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yield (0, "N322 assertEqual(A, None) or assertEqual(None, A) "
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"sentences not allowed, you should use assertIsNone(A) "
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"instead.")
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@skip_ignored_lines
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def assert_true_or_false_with_in(logical_line, filename):
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"""Check assertTrue/False(A in/not in B) with collection contents
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Check for assertTrue/False(A in B), assertTrue/False(A not in B),
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assertTrue/False(A in B, message) or assertTrue/False(A not in B, message)
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sentences.
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N323
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"""
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res = (re_assert_true_false_with_in_or_not_in.search(logical_line) or
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re_assert_true_false_with_in_or_not_in_spaces.search(logical_line))
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if res:
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yield (0, "N323 assertTrue/assertFalse(A in/not in B)sentences not "
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"allowed, you should use assertIn(A, B) or assertNotIn(A, B)"
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" instead.")
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@skip_ignored_lines
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def assert_equal_in(logical_line, filename):
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"""Check assertEqual(A in/not in B, True/False) with collection contents
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Check for assertEqual(A in B, True/False), assertEqual(True/False, A in B),
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assertEqual(A not in B, True/False) or assertEqual(True/False, A not in B)
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sentences.
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N324
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"""
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res = (re_assert_equal_in_end_with_true_or_false.search(logical_line) or
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re_assert_equal_in_start_with_true_or_false.search(logical_line))
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if res:
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yield (0, "N324: Use assertIn/NotIn(A, B) rather than "
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"assertEqual(A in/not in B, True/False) when checking "
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"collection contents.")
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@skip_ignored_lines
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def check_no_direct_rally_objects_import(logical_line, filename):
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"""Check if rally.objects are properly imported.
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If you import "from rally import objects" you are able to use objects
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directly like objects.Task.
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N340
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"""
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if filename == "./rally/objects/__init__.py":
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return
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if (logical_line.startswith("from rally.objects")
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or logical_line.startswith("import rally.objects.")):
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yield (0, "N340: Import objects module: `from rally import objects`. "
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"After that you can use directly objects e.g. objects.Task")
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@skip_ignored_lines
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def check_no_oslo_deprecated_import(logical_line, filename):
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"""Check if oslo.foo packages are not imported instead of oslo_foo ones.
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Libraries from oslo.foo namespace are deprecated because of namespace
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problems.
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N341
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"""
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if (logical_line.startswith("from oslo.")
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or logical_line.startswith("import oslo.")):
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yield (0, "N341: Import oslo module: `from oslo_xyz import ...`. "
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"The oslo.xyz namespace was deprecated, use oslo_xyz "
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"instead")
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@skip_ignored_lines
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def check_quotes(logical_line, filename):
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"""Check that single quotation marks are not used
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N350
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"""
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in_string = False
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in_multiline_string = False
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single_quotas_are_used = False
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check_tripple = (
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lambda line, i, char: (
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i + 2 < len(line) and
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(char == line[i] == line[i + 1] == line[i + 2])
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)
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)
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i = 0
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while i < len(logical_line):
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char = logical_line[i]
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if in_string:
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if char == "\"":
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in_string = False
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if char == "\\":
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i += 1 # ignore next char
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elif in_multiline_string:
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if check_tripple(logical_line, i, "\""):
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i += 2 # skip next 2 chars
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in_multiline_string = False
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elif char == "#":
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break
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elif char == "'":
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single_quotas_are_used = True
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break
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elif char == "\"":
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if check_tripple(logical_line, i, "\""):
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in_multiline_string = True
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i += 3
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continue
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in_string = True
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i += 1
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if single_quotas_are_used:
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yield (i, "N350 Remove Single quotes")
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@skip_ignored_lines
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def check_no_constructor_data_struct(logical_line, filename):
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"""Check that data structs (lists, dicts) are declared using literals
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N351
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"""
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match = re_no_construct_dict.search(logical_line)
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if match:
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yield (0, "N351 Remove dict() construct and use literal {}")
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match = re_no_construct_list.search(logical_line)
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if match:
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yield (0, "N351 Remove list() construct and use literal []")
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def factory(register):
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register(check_assert_methods_from_mock)
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register(check_import_of_logging)
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register(no_translate_debug_logs)
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register(no_use_conf_debug_check)
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register(assert_true_instance)
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register(assert_equal_type)
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register(assert_equal_none)
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register(assert_true_or_false_with_in)
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register(assert_equal_in)
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register(check_no_direct_rally_objects_import)
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register(check_no_oslo_deprecated_import)
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register(check_quotes)
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register(check_no_constructor_data_struct)
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