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# vim: set fileencoding=utf-8 :
import re
from six import StringIO
from nose.tools import ok_
import gbp.log
class GbpLogTester(object):
"""
Helper class for tests that need to capture logging output
"""
def __init__(self):
"""Object initialization"""
self._log = None
self._loghandler = None
def _capture_log(self, capture=True):
""" Capture log"""
if capture:
assert self._log is None, "Log capture already started"
self._log = StringIO()
self._loghandler = gbp.log.GbpStreamHandler(self._log, False)
self._loghandler.addFilter(gbp.log.GbpFilter([gbp.log.WARNING,
gbp.log.ERROR]))
for hdl in gbp.log.LOGGER.handlers:
gbp.log.LOGGER.removeHandler(hdl)
gbp.log.LOGGER.addHandler(self._loghandler)
else:
assert self._log is not None, "Log capture not started"
gbp.log.LOGGER.removeHandler(self._loghandler)
self._loghandler.close()
self._loghandler = None
self._log.close()
self._log = None
def _get_log(self):
"""Get the captured log output"""
self._log.seek(0)
return self._log.readlines()
def _check_log_empty(self):
"""Check that nothig was logged"""
output = self._get_log()
ok_(output == [], "Log is not empty: %s" % output)
def _check_log(self, linenum, regex):
"""Check that the specified line on log matches expectations"""
if self._log is None:
raise Exception("BUG in unittests: no log captured!")
output = self._get_log()[linenum].strip()
ok_(re.match(regex, output),
"Log entry '%s' doesn't match '%s'" % (output, regex))
def _clear_log(self):
"""Clear the mock strerr"""
if self._log is not None:
self._log.seek(0)
self._log.truncate()
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