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# 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 sys
import astroid
import pytest
from pylint.checkers import logging
from pylint.interfaces import UNDEFINED
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], args=("lazy %",))
):
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], args=("lazy %",))
):
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], args=("lazy %",))
):
self.checker.visit_call(stmts[1])
def _assert_logging_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_logging_format_message(self, msg, stmt, args=None, with_too_many=False):
stmts = astroid.extract_node(
"""
import logging #@
logging.error<placeholder> #@
""".replace(
"<placeholder>", stmt
)
)
self.checker.visit_module(None)
self.checker.visit_import(stmts[0])
messages = [Message(msg, node=stmts[1], args=args, confidence=UNDEFINED)]
if with_too_many:
messages.append(
Message("logging-too-many-args", node=stmts[1], confidence=UNDEFINED)
)
with self.assertAddsMessages(*messages):
self.checker.visit_call(stmts[1])
def _assert_logging_format_too_few_args(self, stmt):
self._assert_logging_format_message("logging-too-few-args", stmt)
def _assert_logging_format_too_many_args(self, stmt):
self._assert_logging_format_message("logging-too-many-args", stmt)
@set_config(logging_format_style="new")
def test_brace_format_style_matching_arguments(self):
self._assert_logging_format_no_messages("('constant string')")
self._assert_logging_format_no_messages("('{}')")
self._assert_logging_format_no_messages("('{}', 1)")
self._assert_logging_format_no_messages("('{0}', 1)")
self._assert_logging_format_no_messages("('{named}', {'named': 1})")
self._assert_logging_format_no_messages("('{} {named}', 1, {'named': 1})")
self._assert_logging_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_logging_format_too_few_args("('{}, {}', 1)")
self._assert_logging_format_too_few_args("('{0}, {1}', 1)")
self._assert_logging_format_too_few_args(
"('{named1}, {named2}', {'named1': 1})"
)
self._assert_logging_format_too_few_args("('{0}, {named}', 1)")
self._assert_logging_format_too_few_args("('{}, {named}', {'named': 1})")
self._assert_logging_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_logging_format_too_many_args("('constant string', 1, 2)")
self._assert_logging_format_too_many_args("('{}', 1, 2)")
self._assert_logging_format_too_many_args("('{0}', 1, 2)")
self._assert_logging_format_too_many_args("('{}, {named}', 1, 2, {'named': 1})")
self._assert_logging_format_too_many_args(
"('{0}, {named}', 1, 2, {'named': 1})"
)
@pytest.mark.skipif(sys.version_info < (3, 6), reason="F-string require >=3.6")
@set_config(logging_format_style="new")
def test_fstr_not_new_format_style_matching_arguments(self):
msg = "logging-fstring-interpolation"
args = ("lazy %",)
self._assert_logging_format_message(msg, "(f'{named}')", args)
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