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#!/usr/bin/env python
#
# Copyright 2012 Facebook
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from __future__ import absolute_import, division, print_function, with_statement
import contextlib
import glob
import logging
import os
import re
import subprocess
import sys
import tempfile
import warnings
from tornado.escape import utf8
from tornado.log import LogFormatter, define_logging_options, enable_pretty_logging
from tornado.options import OptionParser
from tornado.test.util import unittest
from tornado.util import u, basestring_type
@contextlib.contextmanager
def ignore_bytes_warning():
with warnings.catch_warnings():
warnings.simplefilter('ignore', category=BytesWarning)
yield
class LogFormatterTest(unittest.TestCase):
# Matches the output of a single logging call (which may be multiple lines
# if a traceback was included, so we use the DOTALL option)
LINE_RE = re.compile(b"(?s)\x01\\[E [0-9]{6} [0-9]{2}:[0-9]{2}:[0-9]{2} log_test:[0-9]+\\]\x02 (.*)")
def setUp(self):
self.formatter = LogFormatter(color=False)
# Fake color support. We can't guarantee anything about the $TERM
# variable when the tests are run, so just patch in some values
# for testing. (testing with color off fails to expose some potential
# encoding issues from the control characters)
self.formatter._colors = {
logging.ERROR: u("\u0001"),
}
self.formatter._normal = u("\u0002")
# construct a Logger directly to bypass getLogger's caching
self.logger = logging.Logger('LogFormatterTest')
self.logger.propagate = False
self.tempdir = tempfile.mkdtemp()
self.filename = os.path.join(self.tempdir, 'log.out')
self.handler = self.make_handler(self.filename)
self.handler.setFormatter(self.formatter)
self.logger.addHandler(self.handler)
def tearDown(self):
self.handler.close()
os.unlink(self.filename)
os.rmdir(self.tempdir)
def make_handler(self, filename):
# Base case: default setup without explicit encoding.
# In python 2, supports arbitrary byte strings and unicode objects
# that contain only ascii. In python 3, supports ascii-only unicode
# strings (but byte strings will be repr'd automatically).
return logging.FileHandler(filename)
def get_output(self):
with open(self.filename, "rb") as f:
line = f.read().strip()
m = LogFormatterTest.LINE_RE.match(line)
if m:
return m.group(1)
else:
raise Exception("output didn't match regex: %r" % line)
def test_basic_logging(self):
self.logger.error("foo")
self.assertEqual(self.get_output(), b"foo")
def test_bytes_logging(self):
with ignore_bytes_warning():
# This will be "\xe9" on python 2 or "b'\xe9'" on python 3
self.logger.error(b"\xe9")
self.assertEqual(self.get_output(), utf8(repr(b"\xe9")))
def test_utf8_logging(self):
with ignore_bytes_warning():
self.logger.error(u("\u00e9").encode("utf8"))
if issubclass(bytes, basestring_type):
# on python 2, utf8 byte strings (and by extension ascii byte
# strings) are passed through as-is.
self.assertEqual(self.get_output(), utf8(u("\u00e9")))
else:
# on python 3, byte strings always get repr'd even if
# they're ascii-only, so this degenerates into another
# copy of test_bytes_logging.
self.assertEqual(self.get_output(), utf8(repr(utf8(u("\u00e9")))))
def test_bytes_exception_logging(self):
try:
raise Exception(b'\xe9')
except Exception:
self.logger.exception('caught exception')
# This will be "Exception: \xe9" on python 2 or
# "Exception: b'\xe9'" on python 3.
output = self.get_output()
self.assertRegexpMatches(output, br'Exception.*\\xe9')
# The traceback contains newlines, which should not have been escaped.
self.assertNotIn(br'\n', output)
class UnicodeLogFormatterTest(LogFormatterTest):
def make_handler(self, filename):
# Adding an explicit encoding configuration allows non-ascii unicode
# strings in both python 2 and 3, without changing the behavior
# for byte strings.
return logging.FileHandler(filename, encoding="utf8")
def test_unicode_logging(self):
self.logger.error(u("\u00e9"))
self.assertEqual(self.get_output(), utf8(u("\u00e9")))
class EnablePrettyLoggingTest(unittest.TestCase):
def setUp(self):
super(EnablePrettyLoggingTest, self).setUp()
self.options = OptionParser()
define_logging_options(self.options)
self.logger = logging.Logger('tornado.test.log_test.EnablePrettyLoggingTest')
self.logger.propagate = False
def test_log_file(self):
tmpdir = tempfile.mkdtemp()
try:
self.options.log_file_prefix = tmpdir + '/test_log'
enable_pretty_logging(options=self.options, logger=self.logger)
self.assertEqual(1, len(self.logger.handlers))
self.logger.error('hello')
self.logger.handlers[0].flush()
filenames = glob.glob(tmpdir + '/test_log*')
self.assertEqual(1, len(filenames))
with open(filenames[0]) as f:
self.assertRegexpMatches(f.read(), r'^\[E [^]]*\] hello$')
finally:
for handler in self.logger.handlers:
handler.flush()
handler.close()
for filename in glob.glob(tmpdir + '/test_log*'):
os.unlink(filename)
os.rmdir(tmpdir)
class LoggingOptionTest(unittest.TestCase):
"""Test the ability to enable and disable Tornado's logging hooks."""
def logs_present(self, statement, args=None):
# Each test may manipulate and/or parse the options and then logs
# a line at the 'info' level. This level is ignored in the
# logging module by default, but Tornado turns it on by default
# so it is the easiest way to tell whether tornado's logging hooks
# ran.
IMPORT = 'from tornado.options import options, parse_command_line'
LOG_INFO = 'import logging; logging.info("hello")'
program = ';'.join([IMPORT, statement, LOG_INFO])
proc = subprocess.Popen(
[sys.executable, '-c', program] + (args or []),
stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
stdout, stderr = proc.communicate()
self.assertEqual(proc.returncode, 0, 'process failed: %r' % stdout)
return b'hello' in stdout
def test_default(self):
self.assertFalse(self.logs_present('pass'))
def test_tornado_default(self):
self.assertTrue(self.logs_present('parse_command_line()'))
def test_disable_command_line(self):
self.assertFalse(self.logs_present('parse_command_line()',
['--logging=none']))
def test_disable_command_line_case_insensitive(self):
self.assertFalse(self.logs_present('parse_command_line()',
['--logging=None']))
def test_disable_code_string(self):
self.assertFalse(self.logs_present(
'options.logging = "none"; parse_command_line()'))
def test_disable_code_none(self):
self.assertFalse(self.logs_present(
'options.logging = None; parse_command_line()'))
def test_disable_override(self):
# command line trumps code defaults
self.assertTrue(self.logs_present(
'options.logging = None; parse_command_line()',
['--logging=info']))
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