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# Copyright (c) 2003-2005 LOGILAB S.A. (Paris, FRANCE).
# http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation; either version 2 of the License, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
"""Tests for the pylint.checkers.utils module."""
import unittest
import warnings
from astroid import test_utils
from pylint.checkers import utils
from pylint import __pkginfo__
class UtilsTC(unittest.TestCase):
def test_is_builtin(self):
self.assertEqual(utils.is_builtin('min'), True)
self.assertEqual(utils.is_builtin('__builtins__'), True)
self.assertEqual(utils.is_builtin('__path__'), False)
self.assertEqual(utils.is_builtin('__file__'), False)
self.assertEqual(utils.is_builtin('whatever'), False)
self.assertEqual(utils.is_builtin('mybuiltin'), False)
def testGetArgumentFromCall(self):
node = test_utils.extract_node('foo(bar=3)')
self.assertIsNotNone(utils.get_argument_from_call(node, keyword='bar'))
with self.assertRaises(utils.NoSuchArgumentError):
node = test_utils.extract_node('foo(3)')
utils.get_argument_from_call(node, keyword='bar')
with self.assertRaises(utils.NoSuchArgumentError):
node = test_utils.extract_node('foo(one=a, two=b, three=c)')
utils.get_argument_from_call(node, position=1)
node = test_utils.extract_node('foo(a, b, c)')
self.assertIsNotNone(utils.get_argument_from_call(node, position=1))
node = test_utils.extract_node('foo(a, not_this_one=1, this_one=2)')
arg = utils.get_argument_from_call(node, position=2, keyword='this_one')
self.assertEqual(2, arg.value)
node = test_utils.extract_node('foo(a)')
with self.assertRaises(utils.NoSuchArgumentError):
utils.get_argument_from_call(node, position=1)
with self.assertRaises(ValueError):
utils.get_argument_from_call(node, None, None)
name = utils.get_argument_from_call(node, position=0)
self.assertEqual(name.name, 'a')
def test_is_import_error(self):
import_error, not_import_error = test_utils.extract_node("""
try:
pass
except ImportError: #@
pass
try:
pass
except AttributeError: #@
pass
""")
if __pkginfo__.numversion >= (1, 6, 0):
with self.assertRaises(AttributeError):
utils.is_import_error
with warnings.catch_warnings(record=True) as cm:
warnings.simplefilter("always")
self.assertTrue(utils.is_import_error(import_error))
self.assertFalse(utils.is_import_error(not_import_error))
self.assertEqual(len(cm), 2)
self.assertIsInstance(cm[0].message, DeprecationWarning)
def test_error_of_type(self):
nodes = test_utils.extract_node("""
try: pass
except AttributeError: #@
pass
try: pass
except Exception: #@
pass
except: #@
pass
""")
self.assertTrue(utils.error_of_type(nodes[0], AttributeError))
self.assertTrue(utils.error_of_type(nodes[0], (AttributeError, )))
self.assertFalse(utils.error_of_type(nodes[0], Exception))
self.assertTrue(utils.error_of_type(nodes[1], Exception))
self.assertTrue(utils.error_of_type(nodes[2], ImportError))
def test_node_ignores_exception(self):
nodes = test_utils.extract_node("""
try:
1/0 #@
except ZeroDivisionError:
pass
try:
1/0 #@
except Exception:
pass
try:
1/0 #@
except:
pass
try:
1/0 #@
except ValueError:
pass
""")
self.assertTrue(utils.node_ignores_exception(nodes[0], ZeroDivisionError))
self.assertTrue(utils.node_ignores_exception(nodes[1], ZeroDivisionError))
self.assertTrue(utils.node_ignores_exception(nodes[2], ZeroDivisionError))
self.assertFalse(utils.node_ignores_exception(nodes[3], ZeroDivisionError))
if __name__ == '__main__':
unittest.main()
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