tptimer/env/lib/python2.7/site-packages/pylint/test/unittest_checker_classes.py

86 lines
2.9 KiB
Python

# Copyright (c) 2014-2016 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
# For details: https://github.com/PyCQA/pylint/blob/master/COPYING
"""Unit tests for the variables checker."""
import sys
import pytest
import astroid
from pylint.checkers import classes
from pylint.testutils import CheckerTestCase, Message, set_config
class TestVariablesChecker(CheckerTestCase):
CHECKER_CLASS = classes.ClassChecker
def test_bitbucket_issue_164(self):
"""Issue 164 report a false negative for access-member-before-definition"""
n1, n2 = astroid.extract_node("""
class MyClass1(object):
def __init__(self):
self.first += 5 #@
self.first = 0 #@
""")
message = Message('access-member-before-definition',
node=n1.target, args=('first', n2.lineno))
with self.assertAddsMessages(message):
self.walk(n1.root())
@set_config(exclude_protected=('_meta', '_manager'))
def test_exclude_protected(self):
"""Test that exclude-protected can be used to
exclude names from protected-access warning.
"""
node = astroid.parse("""
class Protected(object):
'''empty'''
def __init__(self):
self._meta = 42
self._manager = 24
self._teta = 29
OBJ = Protected()
OBJ._meta
OBJ._manager
OBJ._teta
""")
with self.assertAddsMessages(
Message('protected-access',
node=node.body[-1].value,
args='_teta')):
self.walk(node.root())
@pytest.mark.skipif(sys.version_info[0] != 3,
reason="The test works on Python 3.")
def test_regression_non_parent_init_called_tracemalloc(self):
# This used to raise a non-parent-init-called on Pylint 1.3
# See issue https://bitbucket.org/logilab/pylint/issue/308/
# for reference.
node = astroid.extract_node("""
from tracemalloc import Sequence
class _Traces(Sequence):
def __init__(self, traces): #@
Sequence.__init__(self)
""")
with self.assertNoMessages():
self.checker.visit_functiondef(node)
def test_super_init_not_called_regression(self):
# This should not emit a super-init-not-called
# warning. It previously did this, because
# ``next(node.infer())`` was used in that checker's
# logic and the first inferred node was an YES object,
# leading to this false positive.
node = astroid.extract_node("""
import ctypes
class Foo(ctypes.BigEndianStructure):
def __init__(self): #@
ctypes.BigEndianStructure.__init__(self)
""")
with self.assertNoMessages():
self.checker.visit_functiondef(node)