351 lines
14 KiB
Python
351 lines
14 KiB
Python
# Copyright 2014 Red Hat, Inc.
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#
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# 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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import itertools
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import sys
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import textwrap
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from unittest import mock
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import ddt
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import pycodestyle
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from manila.hacking import checks
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from manila import test
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@ddt.ddt
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class HackingTestCase(test.TestCase):
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"""Hacking test cases
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This class tests the hacking checks in manila.hacking.checks by passing
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strings to the check methods like the pep8/flake8 parser would. The parser
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loops over each line in the file and then passes the parameters to the
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check method. The parameter names in the check method dictate what type of
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object is passed to the check method. The parameter types are::
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logical_line: A processed line with the following modifications:
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- Multi-line statements converted to a single line.
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- Stripped left and right.
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- Contents of strings replaced with "xxx" of same length.
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- Comments removed.
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physical_line: Raw line of text from the input file.
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lines: a list of the raw lines from the input file
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tokens: the tokens that contribute to this logical line
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line_number: line number in the input file
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total_lines: number of lines in the input file
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blank_lines: blank lines before this one
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indent_char: indentation character in this file (" " or "\t")
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indent_level: indentation (with tabs expanded to multiples of 8)
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previous_indent_level: indentation on previous line
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previous_logical: previous logical line
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filename: Path of the file being run through pep8
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When running a test on a check method the return will be False/None if
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there is no violation in the sample input. If there is an error a tuple is
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returned with a position in the line, and a message. So to check the result
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just assertTrue if the check is expected to fail and assertFalse if it
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should pass.
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"""
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@ddt.data(*itertools.product(
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('', '_', '_LE', '_LI', '_LW'),
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('audit', 'debug', 'error', 'info', 'warn', 'warning', 'critical',
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'exception',)))
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@ddt.unpack
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def test_no_translate_logs(self, log_marker, log_method):
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code = "LOG.{0}({1}('foo'))".format(log_method, log_marker)
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if log_marker:
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self.assertEqual(1, len(list(checks.no_translate_logs(code))))
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else:
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self.assertEqual(0, len(list(checks.no_translate_logs(code))))
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def test_check_explicit_underscore_import(self):
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self.assertEqual(1, len(list(checks.check_explicit_underscore_import(
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"LOG.info(_('My info message'))",
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"manila/tests/other_files.py"))))
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self.assertEqual(1, len(list(checks.check_explicit_underscore_import(
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"msg = _('My message')",
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"manila/tests/other_files.py"))))
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self.assertEqual(0, len(list(checks.check_explicit_underscore_import(
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"from manila.i18n import _",
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"manila/tests/other_files.py"))))
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self.assertEqual(0, len(list(checks.check_explicit_underscore_import(
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"LOG.info(_('My info message'))",
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"manila/tests/other_files.py"))))
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self.assertEqual(0, len(list(checks.check_explicit_underscore_import(
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"msg = _('My message')",
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"manila/tests/other_files.py"))))
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self.assertEqual(0, len(list(checks.check_explicit_underscore_import(
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"from manila.i18n import _LE, _, _LW",
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"manila/tests/other_files2.py"))))
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self.assertEqual(0, len(list(checks.check_explicit_underscore_import(
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"msg = _('My message')",
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"manila/tests/other_files2.py"))))
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self.assertEqual(0, len(list(checks.check_explicit_underscore_import(
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"_ = translations.ugettext",
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"manila/tests/other_files3.py"))))
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self.assertEqual(0, len(list(checks.check_explicit_underscore_import(
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"msg = _('My message')",
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"manila/tests/other_files3.py"))))
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# Complete code coverage by falling through all checks
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self.assertEqual(0, len(list(checks.check_explicit_underscore_import(
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"LOG.info('My info message')",
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"manila.tests.unit/other_files4.py"))))
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self.assertEqual(0, len(list(checks.check_explicit_underscore_import(
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"from manila.i18n import _LW",
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"manila.tests.unit/other_files5.py"))))
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self.assertEqual(1, len(list(checks.check_explicit_underscore_import(
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"msg = _('My message')",
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"manila.tests.unit/other_files5.py"))))
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# We are patching pep8 so that only the check under test is actually
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# installed.
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@mock.patch('pycodestyle._checks',
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{'physical_line': {}, 'logical_line': {}, 'tree': {}})
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def _run_check(self, code, checker, filename=None):
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pycodestyle.register_check(checker)
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lines = textwrap.dedent(code).strip().splitlines(True)
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checker = pycodestyle.Checker(filename=filename, lines=lines)
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checker.check_all()
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checker.report._deferred_print.sort()
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return checker.report._deferred_print
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def _assert_has_errors(self, code, checker, expected_errors=None,
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filename=None):
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actual_errors = [e[:3] for e in
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self._run_check(code, checker, filename)]
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self.assertEqual(expected_errors or [], actual_errors)
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def _assert_has_no_errors(self, code, checker, filename=None):
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self._assert_has_errors(code, checker, filename=filename)
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def test_logging_format_no_tuple_arguments(self):
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checker = checks.CheckLoggingFormatArgs
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code = """
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import logging
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LOG = logging.getLogger()
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LOG.info("Message without a second argument.")
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LOG.critical("Message with %s arguments.", 'two')
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LOG.debug("Volume %s caught fire and is at %d degrees C and"
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" climbing.", 'volume1', 500)
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"""
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self._assert_has_no_errors(code, checker)
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@ddt.data(*checks.CheckLoggingFormatArgs.LOG_METHODS)
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def test_logging_with_tuple_argument(self, log_method):
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checker = checks.CheckLoggingFormatArgs
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code = """
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import logging
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LOG = logging.getLogger()
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LOG.{0}("Volume %s caught fire and is at %d degrees C and "
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"climbing.", ('volume1', 500))
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"""
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self._assert_has_errors(code.format(log_method), checker,
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expected_errors=[(4, mock.ANY, 'M310')])
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def test_str_on_exception(self):
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checker = checks.CheckForStrUnicodeExc
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code = """
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def f(a, b):
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try:
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p = str(a) + str(b)
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except ValueError as e:
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p = str(e)
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return p
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"""
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errors = [(5, 16, 'M325')]
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self._assert_has_errors(code, checker, expected_errors=errors)
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def test_no_str_unicode_on_exception(self):
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checker = checks.CheckForStrUnicodeExc
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code = """
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def f(a, b):
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try:
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p = unicode(a) + str(b)
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except ValueError as e:
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p = e
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return p
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"""
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self._assert_has_no_errors(code, checker)
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def test_unicode_on_exception(self):
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checker = checks.CheckForStrUnicodeExc
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code = """
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def f(a, b):
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try:
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p = str(a) + str(b)
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except ValueError as e:
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p = unicode(e)
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return p
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"""
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errors = [(5, 20, 'M325')]
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self._assert_has_errors(code, checker, expected_errors=errors)
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def test_str_on_multiple_exceptions(self):
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checker = checks.CheckForStrUnicodeExc
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code = """
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def f(a, b):
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try:
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p = str(a) + str(b)
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except ValueError as e:
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try:
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p = unicode(a) + unicode(b)
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except ValueError as ve:
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p = str(e) + str(ve)
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p = e
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return p
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"""
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errors = [(8, 20, 'M325'), (8, 29, 'M325')]
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self._assert_has_errors(code, checker, expected_errors=errors)
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def test_str_unicode_on_multiple_exceptions(self):
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checker = checks.CheckForStrUnicodeExc
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code = """
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def f(a, b):
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try:
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p = str(a) + str(b)
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except ValueError as e:
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try:
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p = unicode(a) + unicode(b)
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except ValueError as ve:
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p = str(e) + unicode(ve)
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p = str(e)
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return p
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"""
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errors = [(8, 20, 'M325'), (8, 33, 'M325'), (9, 16, 'M325')]
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self._assert_has_errors(code, checker, expected_errors=errors)
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def test_trans_add(self):
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checker = checks.CheckForTransAdd
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code = """
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def fake_tran(msg):
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return msg
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_ = fake_tran
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_LI = _
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_LW = _
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_LE = _
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_LC = _
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def f(a, b):
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msg = _('test') + 'add me'
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msg = _LI('test') + 'add me'
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msg = _LW('test') + 'add me'
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msg = _LE('test') + 'add me'
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msg = _LC('test') + 'add me'
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msg = 'add to me' + _('test')
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return msg
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"""
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# Python 3.4.0 introduced a change to the column calculation during AST
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# parsing. This was reversed in Python 3.4.3, hence the version-based
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# expected value calculation. See #1499743 for more background.
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if sys.version_info < (3, 4, 0) or sys.version_info >= (3, 4, 3):
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errors = [(13, 10, 'M326'), (14, 10, 'M326'), (15, 10, 'M326'),
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(16, 10, 'M326'), (17, 10, 'M326'), (18, 24, 'M326')]
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else:
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errors = [(13, 11, 'M326'), (14, 13, 'M326'), (15, 13, 'M326'),
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(16, 13, 'M326'), (17, 13, 'M326'), (18, 25, 'M326')]
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self._assert_has_errors(code, checker, expected_errors=errors)
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code = """
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def f(a, b):
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msg = 'test' + 'add me'
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return msg
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"""
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errors = []
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self._assert_has_errors(code, checker, expected_errors=errors)
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def test_dict_constructor_with_list_copy(self):
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self.assertEqual(1, len(list(checks.dict_constructor_with_list_copy(
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" dict([(i, connect_info[i])"))))
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self.assertEqual(1, len(list(checks.dict_constructor_with_list_copy(
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" attrs = dict([(k, _from_json(v))"))))
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self.assertEqual(1, len(list(checks.dict_constructor_with_list_copy(
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" type_names = dict((value, key) for key, value in"))))
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self.assertEqual(1, len(list(checks.dict_constructor_with_list_copy(
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" dict((value, key) for key, value in"))))
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self.assertEqual(1, len(list(checks.dict_constructor_with_list_copy(
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"foo(param=dict((k, v) for k, v in bar.items()))"))))
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self.assertEqual(1, len(list(checks.dict_constructor_with_list_copy(
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" dict([[i,i] for i in range(3)])"))))
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self.assertEqual(1, len(list(checks.dict_constructor_with_list_copy(
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" dd = dict([i,i] for i in range(3))"))))
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self.assertEqual(0, len(list(checks.dict_constructor_with_list_copy(
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" create_kwargs = dict(snapshot=snapshot,"))))
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self.assertEqual(0, len(list(checks.dict_constructor_with_list_copy(
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" self._render_dict(xml, data_el, data.__dict__)"))))
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def test_no_xrange(self):
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self.assertEqual(1, len(list(checks.no_xrange("xrange(45)"))))
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self.assertEqual(0, len(list(checks.no_xrange("range(45)"))))
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def test_validate_assertTrue(self):
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test_value = True
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self.assertEqual(0, len(list(checks.validate_assertTrue(
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"assertTrue(True)"))))
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self.assertEqual(1, len(list(checks.validate_assertTrue(
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"assertEqual(True, %s)" % test_value))))
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def test_check_uuid4(self):
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code = """
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fake_uuid = uuid.uuid4()
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"""
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errors = [(1, 0, 'M354')]
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self._assert_has_errors(code, checks.check_uuid4,
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expected_errors=errors)
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code = """
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hex_uuid = uuid.uuid4().hex
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"""
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self._assert_has_no_errors(code, checks.check_uuid4)
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@ddt.unpack
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@ddt.data(
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(1, 'import mock'),
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(0, 'from unittest import mock'),
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(1, 'from mock import patch'),
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(0, 'from unittest.mock import patch'))
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def test_no_third_party_mock(self, err_count, line):
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self.assertEqual(err_count,
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len(list(checks.no_third_party_mock(line))))
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def test_no_log_warn_check(self):
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self.assertEqual(0, len(list(checks.no_log_warn_check(
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"LOG.warning('This should not trigger LOG.warn "
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"hacking check.')"))))
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self.assertEqual(1, len(list(checks.no_log_warn_check(
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"LOG.warn('We should not use LOG.warn')"))))
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foo = """
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LOG.warn('Catch me too, please'
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)
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"""
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self.assertEqual(1, len(list(checks.no_log_warn_check(foo))))
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