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from __future__ import annotations
import json
import logging
import re
import sys
import unittest
from io import StringIO
from typing import TYPE_CHECKING, Any
import pytest
from testfixtures import LogCapture
from twisted.python.failure import Failure
from scrapy.utils.log import (
LogCounterHandler,
SpiderLoggerAdapter,
StreamLogger,
TopLevelFormatter,
failure_to_exc_info,
)
from scrapy.utils.test import get_crawler
from tests.spiders import LogSpider
if TYPE_CHECKING:
from collections.abc import Mapping, MutableMapping
class TestFailureToExcInfo:
def test_failure(self):
try:
0 / 0
except ZeroDivisionError:
exc_info = sys.exc_info()
failure = Failure()
assert exc_info == failure_to_exc_info(failure)
def test_non_failure(self):
assert failure_to_exc_info("test") is None
class TestTopLevelFormatter:
def setup_method(self):
self.handler = LogCapture()
self.handler.addFilter(TopLevelFormatter(["test"]))
def test_top_level_logger(self):
logger = logging.getLogger("test")
with self.handler as log:
logger.warning("test log msg")
log.check(("test", "WARNING", "test log msg"))
def test_children_logger(self):
logger = logging.getLogger("test.test1")
with self.handler as log:
logger.warning("test log msg")
log.check(("test", "WARNING", "test log msg"))
def test_overlapping_name_logger(self):
logger = logging.getLogger("test2")
with self.handler as log:
logger.warning("test log msg")
log.check(("test2", "WARNING", "test log msg"))
def test_different_name_logger(self):
logger = logging.getLogger("different")
with self.handler as log:
logger.warning("test log msg")
log.check(("different", "WARNING", "test log msg"))
class TestLogCounterHandler:
def setup_method(self):
settings = {"LOG_LEVEL": "WARNING"}
self.logger = logging.getLogger("test")
self.logger.setLevel(logging.NOTSET)
self.logger.propagate = False
self.crawler = get_crawler(settings_dict=settings)
self.handler = LogCounterHandler(self.crawler)
self.logger.addHandler(self.handler)
def teardown_method(self):
self.logger.propagate = True
self.logger.removeHandler(self.handler)
def test_init(self):
assert self.crawler.stats.get_value("log_count/DEBUG") is None
assert self.crawler.stats.get_value("log_count/INFO") is None
assert self.crawler.stats.get_value("log_count/WARNING") is None
assert self.crawler.stats.get_value("log_count/ERROR") is None
assert self.crawler.stats.get_value("log_count/CRITICAL") is None
def test_accepted_level(self):
self.logger.error("test log msg")
assert self.crawler.stats.get_value("log_count/ERROR") == 1
def test_filtered_out_level(self):
self.logger.debug("test log msg")
assert self.crawler.stats.get_value("log_count/INFO") is None
class StreamLoggerTest(unittest.TestCase):
def setUp(self):
self.stdout = sys.stdout
logger = logging.getLogger("test")
logger.setLevel(logging.WARNING)
sys.stdout = StreamLogger(logger, logging.ERROR)
def tearDown(self):
sys.stdout = self.stdout
def test_redirect(self):
with LogCapture() as log:
print("test log msg")
log.check(("test", "ERROR", "test log msg"))
@pytest.mark.parametrize(
("base_extra", "log_extra", "expected_extra"),
[
(
{"spider": "test"},
{"extra": {"log_extra": "info"}},
{"extra": {"log_extra": "info", "spider": "test"}},
),
(
{"spider": "test"},
{"extra": None},
{"extra": {"spider": "test"}},
),
(
{"spider": "test"},
{"extra": {"spider": "test2"}},
{"extra": {"spider": "test"}},
),
],
)
def test_spider_logger_adapter_process(
base_extra: Mapping[str, Any], log_extra: MutableMapping, expected_extra: dict
):
logger = logging.getLogger("test")
spider_logger_adapter = SpiderLoggerAdapter(logger, base_extra)
log_message = "test_log_message"
result_message, result_kwargs = spider_logger_adapter.process(
log_message, log_extra
)
assert result_message == log_message
assert result_kwargs == expected_extra
class TestLogging:
def setup_method(self):
self.log_stream = StringIO()
handler = logging.StreamHandler(self.log_stream)
logger = logging.getLogger("log_spider")
logger.addHandler(handler)
logger.setLevel(logging.DEBUG)
self.handler = handler
self.logger = logger
self.spider = LogSpider()
def teardown_method(self):
self.logger.removeHandler(self.handler)
def test_debug_logging(self):
log_message = "Foo message"
self.spider.log_debug(log_message)
log_contents = self.log_stream.getvalue()
assert log_contents == f"{log_message}\n"
def test_info_logging(self):
log_message = "Bar message"
self.spider.log_info(log_message)
log_contents = self.log_stream.getvalue()
assert log_contents == f"{log_message}\n"
def test_warning_logging(self):
log_message = "Baz message"
self.spider.log_warning(log_message)
log_contents = self.log_stream.getvalue()
assert log_contents == f"{log_message}\n"
def test_error_logging(self):
log_message = "Foo bar message"
self.spider.log_error(log_message)
log_contents = self.log_stream.getvalue()
assert log_contents == f"{log_message}\n"
def test_critical_logging(self):
log_message = "Foo bar baz message"
self.spider.log_critical(log_message)
log_contents = self.log_stream.getvalue()
assert log_contents == f"{log_message}\n"
class TestLoggingWithExtra:
def setup_method(self):
self.log_stream = StringIO()
handler = logging.StreamHandler(self.log_stream)
formatter = logging.Formatter(
'{"levelname": "%(levelname)s", "message": "%(message)s", "spider": "%(spider)s", "important_info": "%(important_info)s"}'
)
handler.setFormatter(formatter)
logger = logging.getLogger("log_spider")
logger.addHandler(handler)
logger.setLevel(logging.DEBUG)
self.handler = handler
self.logger = logger
self.spider = LogSpider()
self.regex_pattern = re.compile(r"^<LogSpider\s'log_spider'\sat\s[^>]+>$")
def teardown_method(self):
self.logger.removeHandler(self.handler)
def test_debug_logging(self):
log_message = "Foo message"
extra = {"important_info": "foo"}
self.spider.log_debug(log_message, extra)
log_contents = self.log_stream.getvalue()
log_contents = json.loads(log_contents)
assert log_contents["levelname"] == "DEBUG"
assert log_contents["message"] == log_message
assert self.regex_pattern.match(log_contents["spider"])
assert log_contents["important_info"] == extra["important_info"]
def test_info_logging(self):
log_message = "Bar message"
extra = {"important_info": "bar"}
self.spider.log_info(log_message, extra)
log_contents = self.log_stream.getvalue()
log_contents = json.loads(log_contents)
assert log_contents["levelname"] == "INFO"
assert log_contents["message"] == log_message
assert self.regex_pattern.match(log_contents["spider"])
assert log_contents["important_info"] == extra["important_info"]
def test_warning_logging(self):
log_message = "Baz message"
extra = {"important_info": "baz"}
self.spider.log_warning(log_message, extra)
log_contents = self.log_stream.getvalue()
log_contents = json.loads(log_contents)
assert log_contents["levelname"] == "WARNING"
assert log_contents["message"] == log_message
assert self.regex_pattern.match(log_contents["spider"])
assert log_contents["important_info"] == extra["important_info"]
def test_error_logging(self):
log_message = "Foo bar message"
extra = {"important_info": "foo bar"}
self.spider.log_error(log_message, extra)
log_contents = self.log_stream.getvalue()
log_contents = json.loads(log_contents)
assert log_contents["levelname"] == "ERROR"
assert log_contents["message"] == log_message
assert self.regex_pattern.match(log_contents["spider"])
assert log_contents["important_info"] == extra["important_info"]
def test_critical_logging(self):
log_message = "Foo bar baz message"
extra = {"important_info": "foo bar baz"}
self.spider.log_critical(log_message, extra)
log_contents = self.log_stream.getvalue()
log_contents = json.loads(log_contents)
assert log_contents["levelname"] == "CRITICAL"
assert log_contents["message"] == log_message
assert self.regex_pattern.match(log_contents["spider"])
assert log_contents["important_info"] == extra["important_info"]
def test_overwrite_spider_extra(self):
log_message = "Foo message"
extra = {"important_info": "foo", "spider": "shouldn't change"}
self.spider.log_error(log_message, extra)
log_contents = self.log_stream.getvalue()
log_contents = json.loads(log_contents)
assert log_contents["levelname"] == "ERROR"
assert log_contents["message"] == log_message
assert self.regex_pattern.match(log_contents["spider"])
assert log_contents["important_info"] == extra["important_info"]
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