Affirm metadata transmission in a common function

This introduces grpc_test.test_common for gRPC-specific test code and
fixes issue 2570.
pull/2686/head
Nathaniel Manista 9 years ago
parent 11af974715
commit dde9071f9b
  1. 12
      src/python/grpcio_test/grpc_test/_links/_transmission_test.py
  2. 71
      src/python/grpcio_test/grpc_test/test_common.py

@ -35,6 +35,7 @@ from grpc._adapter import _intermediary_low
from grpc._links import invocation
from grpc._links import service
from grpc.framework.interfaces.links import links
from grpc_test import test_common
from grpc_test._links import _proto_scenarios
from grpc_test.framework.common import test_constants
from grpc_test.framework.interfaces.links import test_cases
@ -94,12 +95,11 @@ class TransmissionTest(test_cases.TransmissionTest, unittest.TestCase):
return _intermediary_low.Code.OK, 'An exuberant test "details" message!'
def assertMetadataTransmitted(self, original_metadata, transmitted_metadata):
# we need to filter out any additional metadata added in transmitted_metadata
# since implementations are allowed to add to what is sent (in any position)
keys, _ = zip(*original_metadata)
self.assertSequenceEqual(
original_metadata,
[x for x in transmitted_metadata if x[0] in keys])
self.assertTrue(
test_common.metadata_transmitted(
original_metadata, transmitted_metadata),
'%s erroneously transmitted as %s' % (
original_metadata, transmitted_metadata))
class RoundTripTest(unittest.TestCase):

@ -0,0 +1,71 @@
# Copyright 2015, Google Inc.
# All rights reserved.
#
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# met:
#
# * Redistributions of source code must retain the above copyright
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# * Redistributions in binary form must reproduce the above
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# in the documentation and/or other materials provided with the
# distribution.
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# contributors may be used to endorse or promote products derived from
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# 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
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.
transmitted_metadata: A metadata value corresponding to original_metadata
after having been transmitted via gRPC.
Returns:
A boolean indicating whether transmitted_metadata accurately reflects
original_metadata after having been transmitted via gRPC.
"""
original = collections.defaultdict(list)
for key, value in original_metadata:
original[key].append(value)
transmitted = collections.defaultdict(list)
for key, value in transmitted_metadata:
transmitted[key].append(value)
for key, values in original.iteritems():
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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