1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
|
# 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.
"""Examples of Python implementations of the stock.proto Stock service."""
from grpc.framework.common import cardinality
from grpc.framework.foundation import abandonment
from grpc.framework.foundation import stream
from grpc.framework.foundation import stream_util
from grpc_test.framework.face.testing import service
from grpc_test._junkdrawer import stock_pb2
SYMBOL_FORMAT = 'test symbol:%03d'
STREAM_LENGTH = 400
# A test-appropriate security-pricing function. :-P
_price = lambda symbol_name: float(hash(symbol_name) % 4096)
def _get_last_trade_price(stock_request, stock_reply_callback, control, active):
"""A unary-request, unary-response test method."""
control.control()
if active():
stock_reply_callback(
stock_pb2.StockReply(
symbol=stock_request.symbol, price=_price(stock_request.symbol)))
else:
raise abandonment.Abandoned()
def _get_last_trade_price_multiple(stock_reply_consumer, control, active):
"""A stream-request, stream-response test method."""
def stock_reply_for_stock_request(stock_request):
control.control()
if active():
return stock_pb2.StockReply(
symbol=stock_request.symbol, price=_price(stock_request.symbol))
else:
raise abandonment.Abandoned()
return stream_util.TransformingConsumer(
stock_reply_for_stock_request, stock_reply_consumer)
def _watch_future_trades(stock_request, stock_reply_consumer, control, active):
"""A unary-request, stream-response test method."""
base_price = _price(stock_request.symbol)
for index in range(stock_request.num_trades_to_watch):
control.control()
if active():
stock_reply_consumer.consume(
stock_pb2.StockReply(
symbol=stock_request.symbol, price=base_price + index))
else:
raise abandonment.Abandoned()
stock_reply_consumer.terminate()
def _get_highest_trade_price(stock_reply_callback, control, active):
"""A stream-request, unary-response test method."""
class StockRequestConsumer(stream.Consumer):
"""Keeps an ongoing record of the most valuable symbol yet consumed."""
def __init__(self):
self._symbol = None
self._price = None
def consume(self, stock_request):
control.control()
if active():
if self._price is None:
self._symbol = stock_request.symbol
self._price = _price(stock_request.symbol)
else:
candidate_price = _price(stock_request.symbol)
if self._price < candidate_price:
self._symbol = stock_request.symbol
self._price = candidate_price
def terminate(self):
control.control()
if active():
if self._symbol is None:
raise ValueError()
else:
stock_reply_callback(
stock_pb2.StockReply(symbol=self._symbol, price=self._price))
self._symbol = None
self._price = None
def consume_and_terminate(self, stock_request):
control.control()
if active():
if self._price is None:
stock_reply_callback(
stock_pb2.StockReply(
symbol=stock_request.symbol,
price=_price(stock_request.symbol)))
else:
candidate_price = _price(stock_request.symbol)
if self._price < candidate_price:
stock_reply_callback(
stock_pb2.StockReply(
symbol=stock_request.symbol, price=candidate_price))
else:
stock_reply_callback(
stock_pb2.StockReply(
symbol=self._symbol, price=self._price))
self._symbol = None
self._price = None
return StockRequestConsumer()
class GetLastTradePrice(service.UnaryUnaryTestMethodImplementation):
"""GetLastTradePrice for use in tests."""
def name(self):
return 'GetLastTradePrice'
def cardinality(self):
return cardinality.Cardinality.UNARY_UNARY
def request_class(self):
return stock_pb2.StockRequest
def response_class(self):
return stock_pb2.StockReply
def serialize_request(self, request):
return request.SerializeToString()
def deserialize_request(self, serialized_request):
return stock_pb2.StockRequest.FromString(serialized_request)
def serialize_response(self, response):
return response.SerializeToString()
def deserialize_response(self, serialized_response):
return stock_pb2.StockReply.FromString(serialized_response)
def service(self, request, response_callback, context, control):
_get_last_trade_price(
request, response_callback, control, context.is_active)
class GetLastTradePriceMessages(service.UnaryUnaryTestMessages):
def __init__(self):
self._index = 0
def request(self):
symbol = SYMBOL_FORMAT % self._index
self._index += 1
return stock_pb2.StockRequest(symbol=symbol)
def verify(self, request, response, test_case):
test_case.assertEqual(request.symbol, response.symbol)
test_case.assertEqual(_price(request.symbol), response.price)
class GetLastTradePriceMultiple(service.StreamStreamTestMethodImplementation):
"""GetLastTradePriceMultiple for use in tests."""
def name(self):
return 'GetLastTradePriceMultiple'
def cardinality(self):
return cardinality.Cardinality.STREAM_STREAM
def request_class(self):
return stock_pb2.StockRequest
def response_class(self):
return stock_pb2.StockReply
def serialize_request(self, request):
return request.SerializeToString()
def deserialize_request(self, serialized_request):
return stock_pb2.StockRequest.FromString(serialized_request)
def serialize_response(self, response):
return response.SerializeToString()
def deserialize_response(self, serialized_response):
return stock_pb2.StockReply.FromString(serialized_response)
def service(self, response_consumer, context, control):
return _get_last_trade_price_multiple(
response_consumer, control, context.is_active)
class GetLastTradePriceMultipleMessages(service.StreamStreamTestMessages):
"""Pairs of message streams for use with GetLastTradePriceMultiple."""
def __init__(self):
self._index = 0
def requests(self):
base_index = self._index
self._index += 1
return [
stock_pb2.StockRequest(symbol=SYMBOL_FORMAT % (base_index + index))
for index in range(STREAM_LENGTH)]
def verify(self, requests, responses, test_case):
test_case.assertEqual(len(requests), len(responses))
for stock_request, stock_reply in zip(requests, responses):
test_case.assertEqual(stock_request.symbol, stock_reply.symbol)
test_case.assertEqual(_price(stock_request.symbol), stock_reply.price)
class WatchFutureTrades(service.UnaryStreamTestMethodImplementation):
"""WatchFutureTrades for use in tests."""
def name(self):
return 'WatchFutureTrades'
def cardinality(self):
return cardinality.Cardinality.UNARY_STREAM
def request_class(self):
return stock_pb2.StockRequest
def response_class(self):
return stock_pb2.StockReply
def serialize_request(self, request):
return request.SerializeToString()
def deserialize_request(self, serialized_request):
return stock_pb2.StockRequest.FromString(serialized_request)
def serialize_response(self, response):
return response.SerializeToString()
def deserialize_response(self, serialized_response):
return stock_pb2.StockReply.FromString(serialized_response)
def service(self, request, response_consumer, context, control):
_watch_future_trades(request, response_consumer, control, context.is_active)
class WatchFutureTradesMessages(service.UnaryStreamTestMessages):
"""Pairs of a single request message and a sequence of response messages."""
def __init__(self):
self._index = 0
def request(self):
symbol = SYMBOL_FORMAT % self._index
self._index += 1
return stock_pb2.StockRequest(
symbol=symbol, num_trades_to_watch=STREAM_LENGTH)
def verify(self, request, responses, test_case):
test_case.assertEqual(STREAM_LENGTH, len(responses))
base_price = _price(request.symbol)
for index, response in enumerate(responses):
test_case.assertEqual(base_price + index, response.price)
class GetHighestTradePrice(service.StreamUnaryTestMethodImplementation):
"""GetHighestTradePrice for use in tests."""
def name(self):
return 'GetHighestTradePrice'
def cardinality(self):
return cardinality.Cardinality.STREAM_UNARY
def request_class(self):
return stock_pb2.StockRequest
def response_class(self):
return stock_pb2.StockReply
def serialize_request(self, request):
return request.SerializeToString()
def deserialize_request(self, serialized_request):
return stock_pb2.StockRequest.FromString(serialized_request)
def serialize_response(self, response):
return response.SerializeToString()
def deserialize_response(self, serialized_response):
return stock_pb2.StockReply.FromString(serialized_response)
def service(self, response_callback, context, control):
return _get_highest_trade_price(
response_callback, control, context.is_active)
class GetHighestTradePriceMessages(service.StreamUnaryTestMessages):
def requests(self):
return [
stock_pb2.StockRequest(symbol=SYMBOL_FORMAT % index)
for index in range(STREAM_LENGTH)]
def verify(self, requests, response, test_case):
price = None
symbol = None
for stock_request in requests:
current_symbol = stock_request.symbol
current_price = _price(current_symbol)
if price is None or price < current_price:
price = current_price
symbol = current_symbol
test_case.assertEqual(price, response.price)
test_case.assertEqual(symbol, response.symbol)
class StockTestService(service.TestService):
"""A corpus of test data with one method of each RPC cardinality."""
def name(self):
return 'Stock'
def unary_unary_scenarios(self):
return {
'GetLastTradePrice': (
GetLastTradePrice(), [GetLastTradePriceMessages()]),
}
def unary_stream_scenarios(self):
return {
'WatchFutureTrades': (
WatchFutureTrades(), [WatchFutureTradesMessages()]),
}
def stream_unary_scenarios(self):
return {
'GetHighestTradePrice': (
GetHighestTradePrice(), [GetHighestTradePriceMessages()])
}
def stream_stream_scenarios(self):
return {
'GetLastTradePriceMultiple': (
GetLastTradePriceMultiple(), [GetLastTradePriceMultipleMessages()]),
}
STOCK_TEST_SERVICE = StockTestService()
|