Application: gvSIG desktop » gvSIG scripting

# Copyright 2013 Google Inc.

# 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.

import unittest

import warnings

import astroid

from pylint import __pkginfo__

from pylint import utils

from pylint import interfaces

from pylint.checkers.utils import check_messages

class PyLintASTWalkerTest(unittest.TestCase):

    class MockLinter(object):

        def __init__(self, msgs):

            self._msgs = msgs

        def is_message_enabled(self, msgid):

            return self._msgs.get(msgid, True)

    class Checker(object):

        def __init__(self):

            self.called = set()

        @check_messages('first-message')

        def visit_module(self, module):

            self.called.add('module')

        @check_messages('second-message')

        def visit_call(self, module):

            raise NotImplementedError

        @check_messages('second-message', 'third-message')

        def visit_assignname(self, module):

            self.called.add('assname')

        @check_messages('second-message')

        def leave_assignname(self, module):

            raise NotImplementedError

    def test_check_messages(self):

        linter = self.MockLinter({'first-message': True,

                                  'second-message': False,

                                  'third-message': True})

        walker = utils.PyLintASTWalker(linter)

        checker = self.Checker()

        walker.add_checker(checker)

        walker.walk(astroid.parse("x = func()"))

        self.assertEqual(set(['module', 'assname']), checker.called)

    def test_deprecated_methods(self):

        class Checker(object):

            def __init__(self):

                self.called = False

            @check_messages('first-message')

            def visit_assname(self, node):

                self.called = True

        linter = self.MockLinter({'first-message': True})

        walker = utils.PyLintASTWalker(linter)

        checker = Checker()

        walker.add_checker(checker)

        with warnings.catch_warnings(record=True) as w:

            warnings.simplefilter('always')

            walker.walk(astroid.parse("x = 1"))

        if __pkginfo__.numversion < (2, 0):

            expected = ('Implemented method visit_assname instead of '

                        'visit_assignname. This will be supported until '

                        'Pylint 2.0.')

            self.assertEqual(len(w), 1)

            self.assertIsInstance(w[0].message, PendingDeprecationWarning)

            self.assertEqual(str(w[0].message), expected)

            self.assertTrue(checker.called)

        else:

            self.assertNotEqual(len(w), 1)

            self.assertFalse(checker.called)

if __name__ == '__main__':

    unittest.main()