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"""Unit tests for the variables checker."""
import unittest
import sys
from astroid import test_utils
from pylint.checkers import classes
from pylint.testutils import CheckerTestCase, Message, set_config
class VariablesCheckerTC(CheckerTestCase):
CHECKER_CLASS = classes.ClassChecker
def test_bitbucket_issue_164(self):
"""Issue 164 report a false negative for access-member-before-definition"""
n1, n2 = test_utils.extract_node("""
class MyClass1(object):
def __init__(self):
self.first += 5 #@
self.first = 0 #@
""")
with self.assertAddsMessages(Message('access-member-before-definition',
node=n1.target, args=('first', n2.lineno))):
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 = test_utils.build_module("""
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())
@unittest.skipUnless(sys.version_info[0] == 3,
"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 = test_utils.extract_node("""
from tracemalloc import Sequence
class _Traces(Sequence):
def __init__(self, traces): #@
Sequence.__init__(self)
""")
with self.assertNoMessages():
self.checker.visit_function(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 = test_utils.extract_node("""
import ctypes
class Foo(ctypes.BigEndianStructure):
def __init__(self): #@
ctypes.BigEndianStructure.__init__(self)
""")
with self.assertNoMessages():
self.checker.visit_function(node)
if __name__ == '__main__':
unittest.main()
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