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# 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.
""" Copyright (c) 2000-2011 LOGILAB S.A. (Paris, FRANCE).
http://www.logilab.fr/ -- mailto:contact@logilab.fr
Check format checker helper functions
"""
from __future__ import unicode_literals
import astroid
from astroid import test_utils
from pylint.checkers.format import *
from pylint.testutils import (
CheckerTestCase, Message, set_config, tokenize_str,
)
class MultiStatementLineTest(CheckerTestCase):
CHECKER_CLASS = FormatChecker
def testSingleLineIfStmts(self):
stmt = test_utils.extract_node("""
if True: pass #@
""")
with self.assertAddsMessages(Message('multiple-statements', node=stmt.body[0])):
self.checker.process_tokens([])
self.checker.visit_default(stmt.body[0])
self.checker.config.single_line_if_stmt = True
with self.assertNoMessages():
self.checker.process_tokens([])
self.checker.visit_default(stmt.body[0])
stmt = test_utils.extract_node("""
if True: pass #@
else:
pass
""")
with self.assertAddsMessages(Message('multiple-statements', node=stmt.body[0])):
self.checker.process_tokens([])
self.checker.visit_default(stmt.body[0])
def testTryExceptFinallyNoMultipleStatement(self):
tree = test_utils.extract_node("""
try: #@
pass
except:
pass
finally:
pass""")
with self.assertNoMessages():
self.checker.process_tokens([])
self.checker.visit_default(tree.body[0])
class SuperfluousParenthesesTest(CheckerTestCase):
CHECKER_CLASS = FormatChecker
def testCheckKeywordParensHandlesValidCases(self):
self.checker._keywords_with_parens = set()
cases = [
'if foo:',
'if foo():',
'if (x and y) or z:',
'assert foo()',
'assert ()',
'if (1, 2) in (3, 4):',
'if (a or b) in c:',
'return (x for x in x)',
'if (x for x in x):',
'for x in (x for x in x):',
'not (foo or bar)',
'not (foo or bar) and baz',
]
with self.assertNoMessages():
for code in cases:
self.checker._check_keyword_parentheses(tokenize_str(code), 0)
def testCheckKeywordParensHandlesUnnecessaryParens(self):
self.checker._keywords_with_parens = set()
cases = [
(Message('superfluous-parens', line=1, args='if'),
'if (foo):', 0),
(Message('superfluous-parens', line=1, args='if'),
'if ((foo, bar)):', 0),
(Message('superfluous-parens', line=1, args='if'),
'if (foo(bar)):', 0),
(Message('superfluous-parens', line=1, args='return'),
'return ((x for x in x))', 0),
(Message('superfluous-parens', line=1, args='not'),
'not (foo)', 0),
(Message('superfluous-parens', line=1, args='not'),
'if not (foo):', 1),
(Message('superfluous-parens', line=1, args='if'),
'if (not (foo)):', 0),
(Message('superfluous-parens', line=1, args='not'),
'if (not (foo)):', 2),
]
for msg, code, offset in cases:
with self.assertAddsMessages(msg):
self.checker._check_keyword_parentheses(tokenize_str(code), offset)
def testFuturePrintStatementWithoutParensWarning(self):
code = """from __future__ import print_function
print('Hello world!')
"""
tree = astroid.parse(code)
with self.assertNoMessages():
self.checker.process_module(tree)
self.checker.process_tokens(tokenize_str(code))
class CheckSpaceTest(CheckerTestCase):
CHECKER_CLASS = FormatChecker
def testParenthesesGood(self):
good_cases = [
'(a)\n',
'(a * (b + c))\n',
'(#\n a)\n',
]
with self.assertNoMessages():
for code in good_cases:
self.checker.process_tokens(tokenize_str(code))
def testParenthesesBad(self):
with self.assertAddsMessages(
Message('bad-whitespace', line=1,
args=('No', 'allowed', 'after', 'bracket', '( a)\n^'))):
self.checker.process_tokens(tokenize_str('( a)\n'))
with self.assertAddsMessages(
Message('bad-whitespace', line=1,
args=('No', 'allowed', 'before', 'bracket', '(a )\n ^'))):
self.checker.process_tokens(tokenize_str('(a )\n'))
with self.assertAddsMessages(
Message('bad-whitespace', line=1,
args=('No', 'allowed', 'before', 'bracket', 'foo (a)\n ^'))):
self.checker.process_tokens(tokenize_str('foo (a)\n'))
with self.assertAddsMessages(
Message('bad-whitespace', line=1,
args=('No', 'allowed', 'before', 'bracket', '{1: 2} [1]\n ^'))):
self.checker.process_tokens(tokenize_str('{1: 2} [1]\n'))
def testTrailingCommaGood(self):
with self.assertNoMessages():
self.checker.process_tokens(tokenize_str('(a, )\n'))
self.checker.process_tokens(tokenize_str('(a,)\n'))
self.checker.config.no_space_check = []
with self.assertNoMessages():
self.checker.process_tokens(tokenize_str('(a,)\n'))
@set_config(no_space_check=[])
def testTrailingCommaBad(self):
with self.assertAddsMessages(
Message('bad-whitespace', line=1,
args=('No', 'allowed', 'before', 'bracket', '(a, )\n ^'))):
self.checker.process_tokens(tokenize_str('(a, )\n'))
def testComma(self):
with self.assertAddsMessages(
Message('bad-whitespace', line=1,
args=('No', 'allowed', 'before', 'comma', '(a , b)\n ^'))):
self.checker.process_tokens(tokenize_str('(a , b)\n'))
def testSpacesAllowedInsideSlices(self):
good_cases = [
'[a:b]\n',
'[a : b]\n',
'[a : ]\n',
'[:a]\n',
'[:]\n',
'[::]\n',
]
with self.assertNoMessages():
for code in good_cases:
self.checker.process_tokens(tokenize_str(code))
def testKeywordSpacingGood(self):
with self.assertNoMessages():
self.checker.process_tokens(tokenize_str('foo(foo=bar)\n'))
self.checker.process_tokens(tokenize_str('lambda x=1: x\n'))
def testKeywordSpacingBad(self):
with self.assertAddsMessages(
Message('bad-whitespace', line=1,
args=('No', 'allowed', 'before', 'keyword argument assignment',
'(foo =bar)\n ^'))):
self.checker.process_tokens(tokenize_str('(foo =bar)\n'))
with self.assertAddsMessages(
Message('bad-whitespace', line=1,
args=('No', 'allowed', 'after', 'keyword argument assignment',
'(foo= bar)\n ^'))):
self.checker.process_tokens(tokenize_str('(foo= bar)\n'))
with self.assertAddsMessages(
Message('bad-whitespace', line=1,
args=('No', 'allowed', 'around', 'keyword argument assignment',
'(foo = bar)\n ^'))):
self.checker.process_tokens(tokenize_str('(foo = bar)\n'))
def testOperatorSpacingGood(self):
good_cases = [
'a = b\n'
'a < b\n'
'a\n< b\n',
]
with self.assertNoMessages():
for code in good_cases:
self.checker.process_tokens(tokenize_str(code))
def testOperatorSpacingBad(self):
with self.assertAddsMessages(
Message('bad-whitespace', line=1,
args=('Exactly one', 'required', 'before', 'comparison', 'a< b\n ^'))):
self.checker.process_tokens(tokenize_str('a< b\n'))
with self.assertAddsMessages(
Message('bad-whitespace', line=1,
args=('Exactly one', 'required', 'after', 'comparison', 'a <b\n ^'))):
self.checker.process_tokens(tokenize_str('a <b\n'))
with self.assertAddsMessages(
Message('bad-whitespace', line=1,
args=('Exactly one', 'required', 'around', 'comparison', 'a<b\n ^'))):
self.checker.process_tokens(tokenize_str('a<b\n'))
with self.assertAddsMessages(
Message('bad-whitespace', line=1,
args=('Exactly one', 'required', 'around', 'comparison', 'a< b\n ^'))):
self.checker.process_tokens(tokenize_str('a< b\n'))
def testEmptyLines(self):
self.checker.config.no_space_check = []
with self.assertAddsMessages(
Message('trailing-whitespace', line=2)):
self.checker.process_tokens(tokenize_str('a = 1\n \nb = 2\n'))
self.checker.config.no_space_check = ['empty-line']
with self.assertNoMessages():
self.checker.process_tokens(tokenize_str('a = 1\n \nb = 2\n'))
if __name__ == '__main__':
import unittest
unittest.main()
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