| # 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 |
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| # |
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| # 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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| |
| """A utility useful in tests of asynchronous, event-driven interfaces.""" |
| |
| import threading |
| |
| from grpc.framework.foundation import stream |
| |
| |
| class Callback(stream.Consumer): |
| """A utility object useful in tests of asynchronous code.""" |
| |
| def __init__(self): |
| self._condition = threading.Condition() |
| self._unary_response = None |
| self._streamed_responses = [] |
| self._completed = False |
| self._abortion = None |
| |
| def abort(self, abortion): |
| with self._condition: |
| self._abortion = abortion |
| self._condition.notify_all() |
| |
| def complete(self, unary_response): |
| with self._condition: |
| self._unary_response = unary_response |
| self._completed = True |
| self._condition.notify_all() |
| |
| def consume(self, streamed_response): |
| with self._condition: |
| self._streamed_responses.append(streamed_response) |
| |
| def terminate(self): |
| with self._condition: |
| self._completed = True |
| self._condition.notify_all() |
| |
| def consume_and_terminate(self, streamed_response): |
| with self._condition: |
| self._streamed_responses.append(streamed_response) |
| self._completed = True |
| self._condition.notify_all() |
| |
| def block_until_terminated(self): |
| with self._condition: |
| while self._abortion is None and not self._completed: |
| self._condition.wait() |
| |
| def response(self): |
| with self._condition: |
| if self._abortion is None: |
| return self._unary_response |
| else: |
| raise AssertionError('Aborted with abortion "%s"!' % self._abortion) |
| |
| def responses(self): |
| with self._condition: |
| if self._abortion is None: |
| return list(self._streamed_responses) |
| else: |
| raise AssertionError('Aborted with abortion "%s"!' % self._abortion) |
| |
| def abortion(self): |
| with self._condition: |
| return self._abortion |