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# Copyright 2015, Google Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""Common code used throughout tests of gRPC."""
import collections
import six
INVOCATION_INITIAL_METADATA = ((b'0', b'abc'), (b'1', b'def'), (b'2', b'ghi'),)
SERVICE_INITIAL_METADATA = ((b'3', b'jkl'), (b'4', b'mno'), (b'5', b'pqr'),)
SERVICE_TERMINAL_METADATA = ((b'6', b'stu'), (b'7', b'vwx'), (b'8', b'yza'),)
DETAILS = b'test details'
def metadata_transmitted(original_metadata, transmitted_metadata):
"""Judges whether or not metadata was acceptably transmitted.
gRPC is allowed to insert key-value pairs into the metadata values given by
applications and to reorder key-value pairs with different keys but it is not
allowed to alter existing key-value pairs or to reorder key-value pairs with
the same key.
Args:
original_metadata: A metadata value used in a test of gRPC. An iterable over
iterables of length 2.
transmitted_metadata: A metadata value corresponding to original_metadata
after having been transmitted via gRPC. An iterable over iterables of
length 2.
Returns:
A boolean indicating whether transmitted_metadata accurately reflects
original_metadata after having been transmitted via gRPC.
"""
original = collections.defaultdict(list)
for key_value_pair in original_metadata:
key, value = tuple(key_value_pair)
original[key].append(value)
transmitted = collections.defaultdict(list)
for key_value_pair in transmitted_metadata:
key, value = tuple(key_value_pair)
transmitted[key].append(value)
for key, values in six.iteritems(original):
transmitted_values = transmitted[key]
transmitted_iterator = iter(transmitted_values)
try:
for value in values:
while True:
transmitted_value = next(transmitted_iterator)
if value == transmitted_value:
break
except StopIteration:
return False
else:
return True
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