python-by-example-150-challenges/venv/lib/python3.6/site-packages/pylint/test/unittest_checker_logging.py

# Copyright (c) 2014 Google, Inc.
# Copyright (c) 2014 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
# Copyright (c) 2015-2018 Claudiu Popa <pcmanticore@gmail.com>
# Copyright (c) 2015 Ionel Cristian Maries <contact@ionelmc.ro>
# Copyright (c) 2016 Derek Gustafson <degustaf@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

"""Unittest for the logging checker."""
import astroid

from pylint.checkers import logging
from pylint.testutils import CheckerTestCase, Message, set_config


class TestLoggingModuleDetection(CheckerTestCase):
    CHECKER_CLASS = logging.LoggingChecker

    def test_detects_standard_logging_module(self):
        stmts = astroid.extract_node(
            """
        import logging #@
        logging.warn('%s' % '%s')  #@
        """
        )
        self.checker.visit_module(None)
        self.checker.visit_import(stmts[0])
        with self.assertAddsMessages(Message("logging-not-lazy", node=stmts[1])):
            self.checker.visit_call(stmts[1])

    def test_dont_crash_on_invalid_format_string(self):
        node = astroid.parse(
            """
        import logging
        logging.error('0} - {1}'.format(1, 2))
        """
        )
        self.walk(node)

    def test_detects_renamed_standard_logging_module(self):
        stmts = astroid.extract_node(
            """
        import logging as blogging #@
        blogging.warn('%s' % '%s')  #@
        """
        )
        self.checker.visit_module(None)
        self.checker.visit_import(stmts[0])
        with self.assertAddsMessages(Message("logging-not-lazy", node=stmts[1])):
            self.checker.visit_call(stmts[1])

    @set_config(logging_modules=["logging", "my.logging"])
    def test_nonstandard_logging_module(self):
        stmts = astroid.extract_node(
            """
        from my import logging as blogging #@
        blogging.warn('%s' % '%s')  #@
        """
        )
        self.checker.visit_module(None)
        self.checker.visit_import(stmts[0])
        with self.assertAddsMessages(Message("logging-not-lazy", node=stmts[1])):
            self.checker.visit_call(stmts[1])

    def _assert_brace_format_no_messages(self, stmt):
        stmts = astroid.extract_node(
            """
        import logging #@
        logging.error<placeholder> #@
        """.replace(
                "<placeholder>", stmt
            )
        )
        self.checker.visit_module(None)
        self.checker.visit_import(stmts[0])
        with self.assertNoMessages():
            self.checker.visit_call(stmts[1])

    def _assert_brace_format_message(self, msg, stmt):
        stmts = astroid.extract_node(
            """
        import logging #@
        logging.error<placeholder> #@
        """.replace(
                "<placeholder>", stmt
            )
        )
        self.checker.visit_module(None)
        self.checker.visit_import(stmts[0])
        with self.assertAddsMessages(Message(msg, node=stmts[1])):
            self.checker.visit_call(stmts[1])

    def _assert_brace_format_too_few_args(self, stmt):
        self._assert_brace_format_message("logging-too-few-args", stmt)

    def _assert_brace_format_too_many_args(self, stmt):
        self._assert_brace_format_message("logging-too-many-args", stmt)

    @set_config(logging_format_style="new")
    def test_brace_format_style_matching_arguments(self):
        self._assert_brace_format_no_messages("('constant string')")
        self._assert_brace_format_no_messages("('{}')")
        self._assert_brace_format_no_messages("('{}', 1)")
        self._assert_brace_format_no_messages("('{0}', 1)")
        self._assert_brace_format_no_messages("('{named}', {'named': 1})")
        self._assert_brace_format_no_messages("('{} {named}', 1, {'named': 1})")
        self._assert_brace_format_no_messages("('{0} {named}', 1, {'named': 1})")

    @set_config(logging_format_style="new")
    def test_brace_format_style_too_few_args(self):
        self._assert_brace_format_too_few_args("('{}, {}', 1)")
        self._assert_brace_format_too_few_args("('{0}, {1}', 1)")
        self._assert_brace_format_too_few_args("('{named1}, {named2}', {'named1': 1})")
        self._assert_brace_format_too_few_args("('{0}, {named}', 1)")
        self._assert_brace_format_too_few_args("('{}, {named}', {'named': 1})")
        self._assert_brace_format_too_few_args("('{0}, {named}', {'named': 1})")

    @set_config(logging_format_style="new")
    def test_brace_format_style_not_enough_arguments(self):
        self._assert_brace_format_too_many_args("('constant string', 1, 2)")
        self._assert_brace_format_too_many_args("('{}', 1, 2)")
        self._assert_brace_format_too_many_args("('{0}', 1, 2)")
        self._assert_brace_format_too_many_args("('{}, {named}', 1, 2, {'named': 1})")
        self._assert_brace_format_too_many_args("('{0}, {named}', 1, 2, {'named': 1})")