# Copyright (c) 2003-2014 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.
"""functional/non regression tests for pylint"""

import unittest
import sys
import re

from os import getcwd
from os.path import abspath, dirname, join

from logilab.common import testlib

from pylint.testutils import (make_tests, LintTestUsingModule, LintTestUsingFile,
    LintTestUpdate, cb_test_gen, linter, test_reporter)

PY3K = sys.version_info >= (3, 0)

# Configure paths
INPUT_DIR = join(dirname(abspath(__file__)), 'input')
MSG_DIR = join(dirname(abspath(__file__)), 'messages')

# Classes

quote = "'" if sys.version_info >= (3, 3) else ''

class LintTestNonExistentModuleTC(LintTestUsingModule):
    module = 'nonexistent'
    _get_expected = lambda self: 'F:  1: No module named %snonexistent%s\n' % (quote, quote)
    tags = testlib.Tags(('generated','pylint_input_%s' % module))

class TestTests(testlib.TestCase):
    """check that all testable messages have been checked"""
    PORTED = set(['I0001', 'I0010', 'W0712', 'E1001', 'W1402', 'E1310', 'E0202',
                  'W0711', 'W0108', 'E0603', 'W0710', 'E0710', 'E0711', 'W1001', 
                  'E1124', 'E1120', 'E1121', 'E1123', 'E1003', 'E1002', 'W0212',
                  'W0109', 'E1004', 'W0604', 'W0601', 'W0602', 'C0112', 'C0330'])

    @testlib.tag('coverage')
    def test_exhaustivity(self):
        # skip fatal messages
        not_tested = set(msg.msgid for msg in linter.msgs_store.messages
                         if msg.msgid[0] != 'F' and msg.may_be_emitted())
        for msgid in test_reporter.message_ids:
            try:
                not_tested.remove(msgid)
            except KeyError:
                continue
        not_tested -= self.PORTED
        self.assertFalse(not_tested)


class LintBuiltinModuleTest(LintTestUsingModule):
    output = join(MSG_DIR, 'builtin_module.txt')
    module = 'sys'
    def test_functionality(self):
        self._test(['sys'])


def gen_tests(filter_rgx):
    if UPDATE:
        callbacks = [cb_test_gen(LintTestUpdate)]
    else:
        callbacks = [cb_test_gen(LintTestUsingModule)]
    tests = make_tests(INPUT_DIR, MSG_DIR, filter_rgx, callbacks)
    if UPDATE:
        return tests

    if filter_rgx:
        is_to_run = re.compile(filter_rgx).search
    else:
        is_to_run = lambda x: 1

    if is_to_run('nonexistent'):
        tests.append(LintTestNonExistentModuleTC)

    tests.append(LintBuiltinModuleTest)

    if not filter_rgx:
        # test all features are tested :)
        tests.append(TestTests)

    assert len(tests) < 196, "Please do not add new test cases here."
    return tests

# Create suite

FILTER_RGX = None
UPDATE = False

def suite():
    return testlib.TestSuite([unittest.makeSuite(test, suiteClass=testlib.TestSuite)
                              for test in gen_tests(FILTER_RGX)])


if __name__=='__main__':
    if '-u' in sys.argv:
        UPDATE = True
        sys.argv.remove('-u')

    if len(sys.argv) > 1:
        FILTER_RGX = sys.argv[1]
        del sys.argv[1]
    testlib.unittest_main(defaultTest='suite')
