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# Copyright (C) 2010 Vinay Sajip. All Rights Reserved.
#
# Permission to use, copy, modify, and distribute this software and its
# documentation for any purpose and without fee is hereby granted,
# provided that the above copyright notice appear in all copies and that
# both that copyright notice and this permission notice appear in
# supporting documentation, and that the name of Vinay Sajip
# not be used in advertising or publicity pertaining to distribution
# of the software without specific, written prior permission.
# VINAY SAJIP DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
# ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
# VINAY SAJIP BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
# ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
# IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#
import logging
from logging.handlers import BufferingHandler
class TestHandler(BufferingHandler):
def __init__(self, matcher):
# BufferingHandler takes a "capacity" argument
# so as to know when to flush. As we're overriding
# shouldFlush anyway, we can set a capacity of zero.
# You can call flush() manually to clear out the
# buffer.
BufferingHandler.__init__(self, 0)
self.formatted = []
self.matcher = matcher
def shouldFlush(self):
return False
def emit(self, record):
self.formatted.append(self.format(record))
self.buffer.append(record.__dict__)
def flush(self):
BufferingHandler.flush(self)
self.formatted = []
def matches(self, **kwargs):
"""
Look for a saved dict whose keys/values match the supplied arguments.
"""
result = False
for d in self.buffer:
if self.matcher.matches(d, **kwargs):
result = True
break
#if not result:
# print('*** matcher failed completely on %d records' % len(self.buffer))
return result
def matchall(self, kwarglist):
"""
Accept a list of keyword argument values and ensure that the handler's
buffer of stored records matches the list one-for-one.
"""
if self.count != len(kwarglist):
result = False
else:
result = True
for d, kwargs in zip(self.buffer, kwarglist):
if not self.matcher.matches(d, **kwargs):
result = False
break
return result
@property
def count(self):
return len(self.buffer)
class Matcher(object):
_partial_matches = ('msg', 'message')
def matches(self, d, **kwargs):
"""
Try to match a single dict with the supplied arguments.
Keys whose values are strings and which are in self._partial_matches
will be checked for partial (i.e. substring) matches. You can extend
this scheme to (for example) do regular expression matching, etc.
"""
result = True
for k in kwargs:
v = kwargs[k]
dv = d.get(k)
if not self.match_value(k, dv, v):
#print('*** matcher failed: %s, %r, %r' % (k, dv, v))
result = False
break
return result
def match_value(self, k, dv, v):
"""
Try to match a single stored value (dv) with a supplied value (v).
"""
if type(v) != type(dv):
result = False
elif type(dv) is not str or k not in self._partial_matches:
result = (v == dv)
else:
result = dv.find(v) >= 0
#if not result:
# print('*** matcher failed on %s: %r vs. %r' % (k, dv, v))
return result
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