mirror of
https://github.com/thegeeklab/ansible-later.git
synced 2024-11-18 02:40:40 +00:00
274 lines
9.3 KiB
Python
274 lines
9.3 KiB
Python
|
from collections import defaultdict
|
||
|
|
import atexit
|
||
|
|
import logging
|
||
|
|
import warnings
|
||
|
|
from pprint import pformat
|
||
|
|
|
||
|
|
from testfixtures.comparison import compare
|
||
|
|
from testfixtures.utils import wrap
|
||
|
|
|
||
|
|
|
||
|
|
class LogCapture(logging.Handler):
|
||
|
|
"""
|
||
|
|
These are used to capture entries logged to the Python logging
|
||
|
|
framework and make assertions about what was logged.
|
||
|
|
|
||
|
|
:param names: A string (or tuple of strings) containing the dotted name(s)
|
||
|
|
of loggers to capture. By default, the root logger is
|
||
|
|
captured.
|
||
|
|
|
||
|
|
:param install: If `True`, the :class:`LogCapture` will be
|
||
|
|
installed as part of its instantiation.
|
||
|
|
|
||
|
|
:param propagate: If specified, any captured loggers will have their
|
||
|
|
`propagate` attribute set to the supplied value. This can
|
||
|
|
be used to prevent propagation from a child logger to a
|
||
|
|
parent logger that has configured handlers.
|
||
|
|
|
||
|
|
:param attributes:
|
||
|
|
|
||
|
|
The sequence of attribute names to return for each record or a callable
|
||
|
|
that extracts a row from a record.
|
||
|
|
|
||
|
|
If a sequence of attribute names, those attributes will be taken from the
|
||
|
|
:class:`~logging.LogRecord`. If an attribute is callable, the value
|
||
|
|
used will be the result of calling it. If an attribute is missing,
|
||
|
|
``None`` will be used in its place.
|
||
|
|
|
||
|
|
If a callable, it will be called with the :class:`~logging.LogRecord`
|
||
|
|
and the value returned will be used as the row..
|
||
|
|
|
||
|
|
:param recursive_check:
|
||
|
|
|
||
|
|
If ``True``, log messages will be compared recursively by
|
||
|
|
:meth:`LogCapture.check`.
|
||
|
|
"""
|
||
|
|
|
||
|
|
instances = set()
|
||
|
|
atexit_setup = False
|
||
|
|
installed = False
|
||
|
|
|
||
|
|
def __init__(self, names=None, install=True, level=1, propagate=None,
|
||
|
|
attributes=('name', 'levelname', 'getMessage'),
|
||
|
|
recursive_check=False):
|
||
|
|
logging.Handler.__init__(self)
|
||
|
|
if not isinstance(names, tuple):
|
||
|
|
names = (names, )
|
||
|
|
self.names = names
|
||
|
|
self.level = level
|
||
|
|
self.propagate = propagate
|
||
|
|
self.attributes = attributes
|
||
|
|
self.recursive_check = recursive_check
|
||
|
|
self.old = defaultdict(dict)
|
||
|
|
self.clear()
|
||
|
|
if install:
|
||
|
|
self.install()
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def atexit(cls):
|
||
|
|
if cls.instances:
|
||
|
|
warnings.warn(
|
||
|
|
'LogCapture instances not uninstalled by shutdown, '
|
||
|
|
'loggers captured:\n'
|
||
|
|
'%s' % ('\n'.join((str(i.names) for i in cls.instances)))
|
||
|
|
)
|
||
|
|
|
||
|
|
def clear(self):
|
||
|
|
"Clear any entries that have been captured."
|
||
|
|
self.records = []
|
||
|
|
|
||
|
|
def emit(self, record):
|
||
|
|
self.records.append(record)
|
||
|
|
|
||
|
|
def install(self):
|
||
|
|
"""
|
||
|
|
Install this :class:`LogHandler` into the Python logging
|
||
|
|
framework for the named loggers.
|
||
|
|
|
||
|
|
This will remove any existing handlers for those loggers and
|
||
|
|
drop their level to that specified on this :class:`LogCapture` in order
|
||
|
|
to capture all logging.
|
||
|
|
"""
|
||
|
|
for name in self.names:
|
||
|
|
logger = logging.getLogger(name)
|
||
|
|
self.old['levels'][name] = logger.level
|
||
|
|
self.old['handlers'][name] = logger.handlers
|
||
|
|
self.old['disabled'][name] = logger.disabled
|
||
|
|
self.old['progagate'][name] = logger.propagate
|
||
|
|
logger.setLevel(self.level)
|
||
|
|
logger.handlers = [self]
|
||
|
|
logger.disabled = False
|
||
|
|
if self.propagate is not None:
|
||
|
|
logger.propagate = self.propagate
|
||
|
|
self.instances.add(self)
|
||
|
|
if not self.__class__.atexit_setup:
|
||
|
|
atexit.register(self.atexit)
|
||
|
|
self.__class__.atexit_setup = True
|
||
|
|
|
||
|
|
def uninstall(self):
|
||
|
|
"""
|
||
|
|
Un-install this :class:`LogHandler` from the Python logging
|
||
|
|
framework for the named loggers.
|
||
|
|
|
||
|
|
This will re-instate any existing handlers for those loggers
|
||
|
|
that were removed during installation and restore their level
|
||
|
|
that prior to installation.
|
||
|
|
"""
|
||
|
|
if self in self.instances:
|
||
|
|
for name in self.names:
|
||
|
|
logger = logging.getLogger(name)
|
||
|
|
logger.setLevel(self.old['levels'][name])
|
||
|
|
logger.handlers = self.old['handlers'][name]
|
||
|
|
logger.disabled = self.old['disabled'][name]
|
||
|
|
logger.propagate = self.old['progagate'][name]
|
||
|
|
self.instances.remove(self)
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def uninstall_all(cls):
|
||
|
|
"This will uninstall all existing :class:`LogHandler` objects."
|
||
|
|
for i in tuple(cls.instances):
|
||
|
|
i.uninstall()
|
||
|
|
|
||
|
|
def _actual_row(self, record):
|
||
|
|
for a in self.attributes:
|
||
|
|
value = getattr(record, a, None)
|
||
|
|
if callable(value):
|
||
|
|
value = value()
|
||
|
|
yield value
|
||
|
|
|
||
|
|
def actual(self):
|
||
|
|
"""
|
||
|
|
The sequence of actual records logged, having had their attributes
|
||
|
|
extracted as specified by the ``attributes`` parameter to the
|
||
|
|
:class:`LogCapture` constructor.
|
||
|
|
|
||
|
|
This can be useful for making more complex assertions about logged
|
||
|
|
records. The actual records logged can also be inspected by using the
|
||
|
|
:attr:`records` attribute.
|
||
|
|
"""
|
||
|
|
actual = []
|
||
|
|
for r in self.records:
|
||
|
|
if callable(self.attributes):
|
||
|
|
actual.append(self.attributes(r))
|
||
|
|
else:
|
||
|
|
result = tuple(self._actual_row(r))
|
||
|
|
if len(result) == 1:
|
||
|
|
actual.append(result[0])
|
||
|
|
else:
|
||
|
|
actual.append(result)
|
||
|
|
return actual
|
||
|
|
|
||
|
|
def __str__(self):
|
||
|
|
if not self.records:
|
||
|
|
return 'No logging captured'
|
||
|
|
return '\n'.join(["%s %s\n %s" % r for r in self.actual()])
|
||
|
|
|
||
|
|
def check(self, *expected):
|
||
|
|
"""
|
||
|
|
This will compare the captured entries with the expected
|
||
|
|
entries provided and raise an :class:`AssertionError` if they
|
||
|
|
do not match.
|
||
|
|
|
||
|
|
:param expected:
|
||
|
|
|
||
|
|
A sequence of entries of the structure specified by the ``attributes``
|
||
|
|
passed to the constructor.
|
||
|
|
"""
|
||
|
|
return compare(
|
||
|
|
expected,
|
||
|
|
actual=self.actual(),
|
||
|
|
recursive=self.recursive_check
|
||
|
|
)
|
||
|
|
|
||
|
|
def check_present(self, *expected, **kw):
|
||
|
|
"""
|
||
|
|
This will check if the captured entries contain all of the expected
|
||
|
|
entries provided and raise an :class:`AssertionError` if not.
|
||
|
|
This will ignore entries that have been captured but that do not
|
||
|
|
match those in ``expected``.
|
||
|
|
|
||
|
|
:param expected:
|
||
|
|
|
||
|
|
A sequence of entries of the structure specified by the ``attributes``
|
||
|
|
passed to the constructor.
|
||
|
|
|
||
|
|
:param order_matters:
|
||
|
|
|
||
|
|
A keyword-only parameter that controls whether the order of the
|
||
|
|
captured entries is required to match those of the expected entries.
|
||
|
|
Defaults to ``True``.
|
||
|
|
"""
|
||
|
|
order_matters = kw.pop('order_matters', True)
|
||
|
|
assert not kw, 'order_matters is the only keyword parameter'
|
||
|
|
actual = self.actual()
|
||
|
|
if order_matters:
|
||
|
|
matched_indices = [0]
|
||
|
|
matched = []
|
||
|
|
for entry in expected:
|
||
|
|
try:
|
||
|
|
index = actual.index(entry, matched_indices[-1])
|
||
|
|
except ValueError:
|
||
|
|
if len(matched_indices) > 1:
|
||
|
|
matched_indices.pop()
|
||
|
|
matched.pop()
|
||
|
|
break
|
||
|
|
else:
|
||
|
|
matched_indices.append(index+1)
|
||
|
|
matched.append(entry)
|
||
|
|
else:
|
||
|
|
return
|
||
|
|
|
||
|
|
compare(expected,
|
||
|
|
actual=matched+actual[matched_indices[-1]:],
|
||
|
|
recursive=self.recursive_check)
|
||
|
|
else:
|
||
|
|
expected = list(expected)
|
||
|
|
matched = []
|
||
|
|
unmatched = []
|
||
|
|
for entry in actual:
|
||
|
|
try:
|
||
|
|
index = expected.index(entry)
|
||
|
|
except ValueError:
|
||
|
|
unmatched.append(entry)
|
||
|
|
else:
|
||
|
|
matched.append(expected.pop(index))
|
||
|
|
if not expected:
|
||
|
|
break
|
||
|
|
if expected:
|
||
|
|
raise AssertionError((
|
||
|
|
'entries not as expected:\n\n'
|
||
|
|
'expected and found:\n%s\n\n'
|
||
|
|
'expected but not found:\n%s\n\n'
|
||
|
|
'other entries:\n%s'
|
||
|
|
) % (pformat(matched), pformat(expected), pformat(unmatched)))
|
||
|
|
|
||
|
|
def __enter__(self):
|
||
|
|
return self
|
||
|
|
|
||
|
|
def __exit__(self, type, value, traceback):
|
||
|
|
self.uninstall()
|
||
|
|
|
||
|
|
|
||
|
|
class LogCaptureForDecorator(LogCapture):
|
||
|
|
|
||
|
|
def install(self):
|
||
|
|
LogCapture.install(self)
|
||
|
|
self.clear()
|
||
|
|
return self
|
||
|
|
|
||
|
|
|
||
|
|
def log_capture(*names, **kw):
|
||
|
|
"""
|
||
|
|
A decorator for making a :class:`LogCapture` installed an
|
||
|
|
available for the duration of a test function.
|
||
|
|
|
||
|
|
:param names: An optional sequence of names specifying the loggers
|
||
|
|
to be captured. If not specified, the root logger
|
||
|
|
will be captured.
|
||
|
|
|
||
|
|
Keyword parameters other than ``install`` may also be supplied and will be
|
||
|
|
passed on to the :class:`LogCapture` constructor.
|
||
|
|
"""
|
||
|
|
l = LogCaptureForDecorator(names or None, install=False, **kw)
|
||
|
|
return wrap(l.install, l.uninstall)
|