| # 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: |
| # |
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| # 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. |
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| # this software without specific prior written permission. |
| # |
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| |
| """Common code used throughout tests of gRPC.""" |
| |
| import collections |
| |
| import six |
| |
| INVOCATION_INITIAL_METADATA = (('0', 'abc'), ('1', 'def'), ('2', 'ghi'),) |
| SERVICE_INITIAL_METADATA = (('3', 'jkl'), ('4', 'mno'), ('5', 'pqr'),) |
| SERVICE_TERMINAL_METADATA = (('6', 'stu'), ('7', 'vwx'), ('8', 'yza'),) |
| DETAILS = '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 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 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 |