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# Foundation; either version 2 of the License, or (at your option) any later

# version.

#

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# this program; if not, write to the Free Software Foundation, Inc.,

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"""Tests for pylint.checkers.exceptions."""

import sys

import unittest

from astroid import test_utils

from pylint.checkers import exceptions

from pylint.testutils import CheckerTestCase, Message

class ExceptionsCheckerTest(CheckerTestCase):

    """Tests for pylint.checkers.exceptions."""

    CHECKER_CLASS = exceptions.ExceptionsChecker

    # These tests aren't in the functional test suite,

    # since they will be converted with 2to3 for Python 3

    # and `raise (Error, ...)` will be converted to

    # `raise Error(...)`, so it beats the purpose of the test.

    @unittest.skipUnless(sys.version_info[0] == 3,

                         "The test should emit an error on Python 3.")

    def test_raising_bad_type_python3(self):

        node = test_utils.extract_node('raise (ZeroDivisionError, None)  #@')

        message = Message('raising-bad-type', node=node, args='tuple')

        with self.assertAddsMessages(message):

            self.checker.visit_raise(node)

    @unittest.skipUnless(sys.version_info[0] == 2,

                         "The test is valid only on Python 2.")

    def test_raising_bad_type_python2(self):

        nodes = test_utils.extract_node('''

        raise (ZeroDivisionError, None)  #@

        from something import something

        raise (something, None) #@

        raise (4, None) #@

        raise () #@

        ''')

        with self.assertNoMessages():

            self.checker.visit_raise(nodes[0])

        with self.assertNoMessages():

            self.checker.visit_raise(nodes[1])

        message = Message('raising-bad-type', node=nodes[2], args='tuple')

        with self.assertAddsMessages(message):

            self.checker.visit_raise(nodes[2])

        message = Message('raising-bad-type', node=nodes[3], args='tuple')

        with self.assertAddsMessages(message):

            self.checker.visit_raise(nodes[3])

if __name__ == '__main__':

    unittest.main()