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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright 2018 João Pedro Rodrigues
#
# 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.
"""
Utility classes/functions for the Tests.
"""
try:
from cStringIO import StringIO
except ImportError: # Py 3.x?
from io import StringIO
import sys
class OutputCapture(object):
"""Context manager to capture output usually redirected to stdout.
Use as:
>>> with OutputCapture() as output:
>>> ....run_stuff()
>>> print(output) # list with lines
"""
def __enter__(self):
self.stdout = []
self.stderr = []
self._stdout = sys.stdout
self._stderr = sys.stderr
sys.stdout = self._stringout = StringIO()
sys.stderr = self._stringerr = StringIO()
return self
def __exit__(self, *args):
self.stdout.extend(self._stringout.getvalue().splitlines())
self.stderr.extend(self._stringerr.getvalue().splitlines())
del self._stringout # free up some memory
del self._stringerr # free up some memory
sys.stdout = self._stdout
sys.stderr = self._stderr
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