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warnaserror.py
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warnaserror.py
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from nose.plugins import Plugin
import warnings
__author__ = 'Bernhard Thiel'
class WarnAsError(Plugin):
"""Treat warnings that occur DURING tests as errors."""
enabled = False
def options(self, parser, env):
"""
Add options to command line.
"""
super(WarnAsError, self).options(parser, env)
parser.add_option(
str('--warning-class'), action='store', dest='warning_class',
default=None,
help="Set the warning class to turn into an error. Default: all warnings"
)
def configure(self, options, conf):
"""
Configure plugin.
"""
super(WarnAsError, self).configure(options, conf)
self.options = options
def prepareTestRunner(self, runner):
"""
Treat warnings as errors.
"""
return WaETestRunner(runner, self.options.warning_class)
class WaETestRunner(object):
def __init__(self, runner, warning_class=None):
self.runner = runner
self.warning_class = warning_class
def run(self, test):
warning_class = Warning
if self.warning_class:
if '.' in self.warning_class:
path, obj = self.warning_class.rsplit('.', 1)
else:
path = 'builtins'
obj = self.warning_class
import importlib
warning_class = getattr(importlib.import_module(path), obj)
with warnings.catch_warnings():
warnings.simplefilter("error", category=warning_class)
return self.runner.run(test)