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# Copyright (c) 2016 Alexander Todorov <atodorov@otb.bg>
# Copyright (c) 2016 Łukasz Rogalski <rogalski.91@gmail.com>
# Copyright (c) 2017 Claudiu Popa <pcmanticore@gmail.com>
# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
# For details: https://github.com/PyCQA/pylint/blob/master/COPYING
"""Tests for the pylint checker in :mod:`pylint.extensions.emptystring
"""
import os
import os.path as osp
import unittest
from pylint import checkers
from pylint.extensions.comparetozero import CompareToZeroChecker
from pylint.lint import PyLinter
from pylint.reporters import BaseReporter
class CompareToZeroTestReporter(BaseReporter):
def handle_message(self, msg):
self.messages.append(msg)
def on_set_current_module(self, module, filepath):
self.messages = []
class CompareToZeroUsedTC(unittest.TestCase):
@classmethod
def setUpClass(cls):
cls._linter = PyLinter()
cls._linter.set_reporter(CompareToZeroTestReporter())
checkers.initialize(cls._linter)
cls._linter.register_checker(CompareToZeroChecker(cls._linter))
cls._linter.disable("I")
def test_comparetozero_message(self):
elif_test = osp.join(
osp.dirname(osp.abspath(__file__)), "data", "compare_to_zero.py"
)
self._linter.check([elif_test])
msgs = self._linter.reporter.messages
self.assertEqual(len(msgs), 4)
for msg in msgs:
self.assertEqual(msg.symbol, "compare-to-zero")
self.assertEqual(msg.msg, "Avoid comparisons to zero")
self.assertEqual(msgs[0].line, 6)
self.assertEqual(msgs[1].line, 9)
self.assertEqual(msgs[2].line, 12)
self.assertEqual(msgs[3].line, 15)
if __name__ == "__main__":
unittest.main()
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