| 1 | # |
| 2 | # Copyright (C) 2019 EfficiOS Inc. |
| 3 | # |
| 4 | # This program is free software; you can redistribute it and/or |
| 5 | # modify it under the terms of the GNU General Public License |
| 6 | # as published by the Free Software Foundation; only version 2 |
| 7 | # of the License. |
| 8 | # |
| 9 | # This program is distributed in the hope that it will be useful, |
| 10 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | # GNU General Public License for more details. |
| 13 | # |
| 14 | # You should have received a copy of the GNU General Public License |
| 15 | # along with this program; if not, write to the Free Software |
| 16 | # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 17 | # |
| 18 | |
| 19 | import unittest |
| 20 | import bt2 |
| 21 | import sys |
| 22 | from utils import TestOutputPortMessageIterator |
| 23 | from bt2 import port as bt2_port |
| 24 | |
| 25 | |
| 26 | class SimpleSink(bt2._UserSinkComponent): |
| 27 | # Straightforward sink that creates one input port (`in`) and consumes from |
| 28 | # it. |
| 29 | |
| 30 | def __init__(self, params, obj): |
| 31 | self._add_input_port('in') |
| 32 | |
| 33 | def _user_consume(self): |
| 34 | next(self._msg_iter) |
| 35 | |
| 36 | def _user_graph_is_configured(self): |
| 37 | self._msg_iter = self._create_input_port_message_iterator( |
| 38 | self._input_ports['in'] |
| 39 | ) |
| 40 | |
| 41 | |
| 42 | def _create_graph(src_comp_cls, sink_comp_cls, flt_comp_cls=None): |
| 43 | graph = bt2.Graph() |
| 44 | |
| 45 | src_comp = graph.add_component(src_comp_cls, 'src') |
| 46 | sink_comp = graph.add_component(sink_comp_cls, 'sink') |
| 47 | |
| 48 | if flt_comp_cls is not None: |
| 49 | flt_comp = graph.add_component(flt_comp_cls, 'flt') |
| 50 | graph.connect_ports(src_comp.output_ports['out'], flt_comp.input_ports['in']) |
| 51 | graph.connect_ports(flt_comp.output_ports['out'], sink_comp.input_ports['in']) |
| 52 | else: |
| 53 | graph.connect_ports(src_comp.output_ports['out'], sink_comp.input_ports['in']) |
| 54 | |
| 55 | return graph |
| 56 | |
| 57 | |
| 58 | class UserMessageIteratorTestCase(unittest.TestCase): |
| 59 | def test_init(self): |
| 60 | the_output_port_from_source = None |
| 61 | the_output_port_from_iter = None |
| 62 | |
| 63 | class MyIter(bt2._UserMessageIterator): |
| 64 | def __init__(self, self_port_output): |
| 65 | nonlocal initialized |
| 66 | nonlocal the_output_port_from_iter |
| 67 | initialized = True |
| 68 | the_output_port_from_iter = self_port_output |
| 69 | |
| 70 | class MySource(bt2._UserSourceComponent, message_iterator_class=MyIter): |
| 71 | def __init__(self, params, obj): |
| 72 | nonlocal the_output_port_from_source |
| 73 | the_output_port_from_source = self._add_output_port('out', 'user data') |
| 74 | |
| 75 | initialized = False |
| 76 | graph = _create_graph(MySource, SimpleSink) |
| 77 | graph.run() |
| 78 | self.assertTrue(initialized) |
| 79 | self.assertEqual( |
| 80 | the_output_port_from_source.addr, the_output_port_from_iter.addr |
| 81 | ) |
| 82 | self.assertEqual(the_output_port_from_iter.user_data, 'user data') |
| 83 | |
| 84 | def test_create_from_message_iterator(self): |
| 85 | class MySourceIter(bt2._UserMessageIterator): |
| 86 | def __init__(self, self_port_output): |
| 87 | nonlocal src_iter_initialized |
| 88 | src_iter_initialized = True |
| 89 | |
| 90 | class MySource(bt2._UserSourceComponent, message_iterator_class=MySourceIter): |
| 91 | def __init__(self, params, obj): |
| 92 | self._add_output_port('out') |
| 93 | |
| 94 | class MyFilterIter(bt2._UserMessageIterator): |
| 95 | def __init__(self, self_port_output): |
| 96 | nonlocal flt_iter_initialized |
| 97 | flt_iter_initialized = True |
| 98 | self._up_iter = self._create_input_port_message_iterator( |
| 99 | self._component._input_ports['in'] |
| 100 | ) |
| 101 | |
| 102 | def __next__(self): |
| 103 | return next(self._up_iter) |
| 104 | |
| 105 | class MyFilter(bt2._UserFilterComponent, message_iterator_class=MyFilterIter): |
| 106 | def __init__(self, params, obj): |
| 107 | self._add_input_port('in') |
| 108 | self._add_output_port('out') |
| 109 | |
| 110 | src_iter_initialized = False |
| 111 | flt_iter_initialized = False |
| 112 | graph = _create_graph(MySource, SimpleSink, MyFilter) |
| 113 | graph.run() |
| 114 | self.assertTrue(src_iter_initialized) |
| 115 | self.assertTrue(flt_iter_initialized) |
| 116 | |
| 117 | def test_create_user_error(self): |
| 118 | # This tests both error handling by |
| 119 | # _UserSinkComponent._create_input_port_message_iterator |
| 120 | # and _UserMessageIterator._create_input_port_message_iterator, as they |
| 121 | # are both used in the graph. |
| 122 | class MySourceIter(bt2._UserMessageIterator): |
| 123 | def __init__(self, self_port_output): |
| 124 | raise ValueError('Very bad error') |
| 125 | |
| 126 | class MySource(bt2._UserSourceComponent, message_iterator_class=MySourceIter): |
| 127 | def __init__(self, params, obj): |
| 128 | self._add_output_port('out') |
| 129 | |
| 130 | class MyFilterIter(bt2._UserMessageIterator): |
| 131 | def __init__(self, self_port_output): |
| 132 | # This is expected to raise because of the error in |
| 133 | # MySourceIter.__init__. |
| 134 | self._create_input_port_message_iterator( |
| 135 | self._component._input_ports['in'] |
| 136 | ) |
| 137 | |
| 138 | class MyFilter(bt2._UserFilterComponent, message_iterator_class=MyFilterIter): |
| 139 | def __init__(self, params, obj): |
| 140 | self._add_input_port('in') |
| 141 | self._add_output_port('out') |
| 142 | |
| 143 | graph = _create_graph(MySource, SimpleSink, MyFilter) |
| 144 | |
| 145 | with self.assertRaises(bt2._Error) as ctx: |
| 146 | graph.run() |
| 147 | |
| 148 | exc = ctx.exception |
| 149 | cause = exc[0] |
| 150 | |
| 151 | self.assertIsInstance(cause, bt2._MessageIteratorErrorCause) |
| 152 | self.assertEqual(cause.component_name, 'src') |
| 153 | self.assertEqual(cause.component_output_port_name, 'out') |
| 154 | self.assertIn('ValueError: Very bad error', cause.message) |
| 155 | |
| 156 | def test_finalize(self): |
| 157 | class MyIter(bt2._UserMessageIterator): |
| 158 | def _user_finalize(self): |
| 159 | nonlocal finalized |
| 160 | finalized = True |
| 161 | |
| 162 | class MySource(bt2._UserSourceComponent, message_iterator_class=MyIter): |
| 163 | def __init__(self, params, obj): |
| 164 | self._add_output_port('out') |
| 165 | |
| 166 | finalized = False |
| 167 | graph = _create_graph(MySource, SimpleSink) |
| 168 | graph.run() |
| 169 | del graph |
| 170 | self.assertTrue(finalized) |
| 171 | |
| 172 | def test_component(self): |
| 173 | class MyIter(bt2._UserMessageIterator): |
| 174 | def __init__(self, self_port_output): |
| 175 | nonlocal salut |
| 176 | salut = self._component._salut |
| 177 | |
| 178 | class MySource(bt2._UserSourceComponent, message_iterator_class=MyIter): |
| 179 | def __init__(self, params, obj): |
| 180 | self._add_output_port('out') |
| 181 | self._salut = 23 |
| 182 | |
| 183 | salut = None |
| 184 | graph = _create_graph(MySource, SimpleSink) |
| 185 | graph.run() |
| 186 | self.assertEqual(salut, 23) |
| 187 | |
| 188 | def test_port(self): |
| 189 | class MyIter(bt2._UserMessageIterator): |
| 190 | def __init__(self_iter, self_port_output): |
| 191 | nonlocal called |
| 192 | called = True |
| 193 | port = self_iter._port |
| 194 | self.assertIs(type(self_port_output), bt2_port._UserComponentOutputPort) |
| 195 | self.assertIs(type(port), bt2_port._UserComponentOutputPort) |
| 196 | self.assertEqual(self_port_output.addr, port.addr) |
| 197 | |
| 198 | class MySource(bt2._UserSourceComponent, message_iterator_class=MyIter): |
| 199 | def __init__(self, params, obj): |
| 200 | self._add_output_port('out') |
| 201 | |
| 202 | called = False |
| 203 | graph = _create_graph(MySource, SimpleSink) |
| 204 | graph.run() |
| 205 | self.assertTrue(called) |
| 206 | |
| 207 | def test_addr(self): |
| 208 | class MyIter(bt2._UserMessageIterator): |
| 209 | def __init__(self, self_port_output): |
| 210 | nonlocal addr |
| 211 | addr = self.addr |
| 212 | |
| 213 | class MySource(bt2._UserSourceComponent, message_iterator_class=MyIter): |
| 214 | def __init__(self, params, obj): |
| 215 | self._add_output_port('out') |
| 216 | |
| 217 | addr = None |
| 218 | graph = _create_graph(MySource, SimpleSink) |
| 219 | graph.run() |
| 220 | self.assertIsNotNone(addr) |
| 221 | self.assertNotEqual(addr, 0) |
| 222 | |
| 223 | # Test that messages returned by _UserMessageIterator.__next__ remain valid |
| 224 | # and can be re-used. |
| 225 | def test_reuse_message(self): |
| 226 | class MyIter(bt2._UserMessageIterator): |
| 227 | def __init__(self, port): |
| 228 | tc, sc, ec = port.user_data |
| 229 | trace = tc() |
| 230 | stream = trace.create_stream(sc) |
| 231 | packet = stream.create_packet() |
| 232 | |
| 233 | # This message will be returned twice by __next__. |
| 234 | event_message = self._create_event_message(ec, packet) |
| 235 | |
| 236 | self._msgs = [ |
| 237 | self._create_stream_beginning_message(stream), |
| 238 | self._create_packet_beginning_message(packet), |
| 239 | event_message, |
| 240 | event_message, |
| 241 | ] |
| 242 | |
| 243 | def __next__(self): |
| 244 | return self._msgs.pop(0) |
| 245 | |
| 246 | class MySource(bt2._UserSourceComponent, message_iterator_class=MyIter): |
| 247 | def __init__(self, params, obj): |
| 248 | tc = self._create_trace_class() |
| 249 | sc = tc.create_stream_class(supports_packets=True) |
| 250 | ec = sc.create_event_class() |
| 251 | self._add_output_port('out', (tc, sc, ec)) |
| 252 | |
| 253 | graph = bt2.Graph() |
| 254 | src = graph.add_component(MySource, 'src') |
| 255 | it = TestOutputPortMessageIterator(graph, src.output_ports['out']) |
| 256 | |
| 257 | # Skip beginning messages. |
| 258 | msg = next(it) |
| 259 | self.assertIs(type(msg), bt2._StreamBeginningMessageConst) |
| 260 | msg = next(it) |
| 261 | self.assertIs(type(msg), bt2._PacketBeginningMessageConst) |
| 262 | |
| 263 | msg_ev1 = next(it) |
| 264 | msg_ev2 = next(it) |
| 265 | |
| 266 | self.assertIs(type(msg_ev1), bt2._EventMessageConst) |
| 267 | self.assertIs(type(msg_ev2), bt2._EventMessageConst) |
| 268 | self.assertEqual(msg_ev1.addr, msg_ev2.addr) |
| 269 | |
| 270 | # Try consuming many times from an iterator that always returns TryAgain. |
| 271 | # This verifies that we are not missing an incref of Py_None, making the |
| 272 | # refcount of Py_None reach 0. |
| 273 | def test_try_again_many_times(self): |
| 274 | class MyIter(bt2._UserMessageIterator): |
| 275 | def __next__(self): |
| 276 | raise bt2.TryAgain |
| 277 | |
| 278 | class MySource(bt2._UserSourceComponent, message_iterator_class=MyIter): |
| 279 | def __init__(self, params, obj): |
| 280 | self._add_output_port('out') |
| 281 | |
| 282 | class MyFilterIter(bt2._UserMessageIterator): |
| 283 | def __init__(self, port): |
| 284 | input_port = port.user_data |
| 285 | self._upstream_iter = self._create_input_port_message_iterator( |
| 286 | input_port |
| 287 | ) |
| 288 | |
| 289 | def __next__(self): |
| 290 | return next(self._upstream_iter) |
| 291 | |
| 292 | def _user_seek_beginning(self): |
| 293 | self._upstream_iter.seek_beginning() |
| 294 | |
| 295 | @property |
| 296 | def _user_can_seek_beginning(self): |
| 297 | return self._upstream_iter.can_seek_beginning |
| 298 | |
| 299 | class MyFilter(bt2._UserFilterComponent, message_iterator_class=MyFilterIter): |
| 300 | def __init__(self, params, obj): |
| 301 | input_port = self._add_input_port('in') |
| 302 | self._add_output_port('out', input_port) |
| 303 | |
| 304 | graph = bt2.Graph() |
| 305 | src = graph.add_component(MySource, 'src') |
| 306 | it = TestOutputPortMessageIterator(graph, src.output_ports['out']) |
| 307 | |
| 308 | # Three times the initial ref count of `None` iterations should |
| 309 | # be enough to catch the bug even if there are small differences |
| 310 | # between configurations. |
| 311 | none_ref_count = sys.getrefcount(None) * 3 |
| 312 | |
| 313 | for i in range(none_ref_count): |
| 314 | with self.assertRaises(bt2.TryAgain): |
| 315 | next(it) |
| 316 | |
| 317 | |
| 318 | def _setup_seek_test(sink_cls, user_seek_beginning=None, user_can_seek_beginning=None): |
| 319 | class MySourceIter(bt2._UserMessageIterator): |
| 320 | def __init__(self, port): |
| 321 | tc, sc, ec = port.user_data |
| 322 | trace = tc() |
| 323 | stream = trace.create_stream(sc) |
| 324 | packet = stream.create_packet() |
| 325 | |
| 326 | self._msgs = [ |
| 327 | self._create_stream_beginning_message(stream), |
| 328 | self._create_packet_beginning_message(packet), |
| 329 | self._create_event_message(ec, packet), |
| 330 | self._create_event_message(ec, packet), |
| 331 | self._create_packet_end_message(packet), |
| 332 | self._create_stream_end_message(stream), |
| 333 | ] |
| 334 | self._at = 0 |
| 335 | |
| 336 | def __next__(self): |
| 337 | if self._at < len(self._msgs): |
| 338 | msg = self._msgs[self._at] |
| 339 | self._at += 1 |
| 340 | return msg |
| 341 | else: |
| 342 | raise StopIteration |
| 343 | |
| 344 | if user_seek_beginning is not None: |
| 345 | MySourceIter._user_seek_beginning = user_seek_beginning |
| 346 | |
| 347 | if user_can_seek_beginning is not None: |
| 348 | MySourceIter._user_can_seek_beginning = property(user_can_seek_beginning) |
| 349 | |
| 350 | class MySource(bt2._UserSourceComponent, message_iterator_class=MySourceIter): |
| 351 | def __init__(self, params, obj): |
| 352 | tc = self._create_trace_class() |
| 353 | sc = tc.create_stream_class(supports_packets=True) |
| 354 | ec = sc.create_event_class() |
| 355 | |
| 356 | self._add_output_port('out', (tc, sc, ec)) |
| 357 | |
| 358 | class MyFilterIter(bt2._UserMessageIterator): |
| 359 | def __init__(self, port): |
| 360 | self._upstream_iter = self._create_input_port_message_iterator( |
| 361 | self._component._input_ports['in'] |
| 362 | ) |
| 363 | |
| 364 | def __next__(self): |
| 365 | return next(self._upstream_iter) |
| 366 | |
| 367 | @property |
| 368 | def _user_can_seek_beginning(self): |
| 369 | return self._upstream_iter.can_seek_beginning |
| 370 | |
| 371 | def _user_seek_beginning(self): |
| 372 | self._upstream_iter.seek_beginning() |
| 373 | |
| 374 | class MyFilter(bt2._UserFilterComponent, message_iterator_class=MyFilterIter): |
| 375 | def __init__(self, params, obj): |
| 376 | self._add_input_port('in') |
| 377 | self._add_output_port('out') |
| 378 | |
| 379 | return _create_graph(MySource, sink_cls, flt_comp_cls=MyFilter) |
| 380 | |
| 381 | |
| 382 | class UserMessageIteratorSeekBeginningTestCase(unittest.TestCase): |
| 383 | def test_can_seek_beginning(self): |
| 384 | class MySink(bt2._UserSinkComponent): |
| 385 | def __init__(self, params, obj): |
| 386 | self._add_input_port('in') |
| 387 | |
| 388 | def _user_graph_is_configured(self): |
| 389 | self._msg_iter = self._create_input_port_message_iterator( |
| 390 | self._input_ports['in'] |
| 391 | ) |
| 392 | |
| 393 | def _user_consume(self): |
| 394 | nonlocal can_seek_beginning |
| 395 | can_seek_beginning = self._msg_iter.can_seek_beginning |
| 396 | |
| 397 | def _user_can_seek_beginning(self): |
| 398 | nonlocal input_port_iter_can_seek_beginning |
| 399 | return input_port_iter_can_seek_beginning |
| 400 | |
| 401 | graph = _setup_seek_test( |
| 402 | MySink, user_can_seek_beginning=_user_can_seek_beginning |
| 403 | ) |
| 404 | |
| 405 | input_port_iter_can_seek_beginning = True |
| 406 | can_seek_beginning = None |
| 407 | graph.run_once() |
| 408 | self.assertTrue(can_seek_beginning) |
| 409 | |
| 410 | input_port_iter_can_seek_beginning = False |
| 411 | can_seek_beginning = None |
| 412 | graph.run_once() |
| 413 | self.assertFalse(can_seek_beginning) |
| 414 | |
| 415 | def test_no_can_seek_beginning_with_seek_beginning(self): |
| 416 | # Test an iterator without a _user_can_seek_beginning method, but with |
| 417 | # a _user_seek_beginning method. |
| 418 | class MySink(bt2._UserSinkComponent): |
| 419 | def __init__(self, params, obj): |
| 420 | self._add_input_port('in') |
| 421 | |
| 422 | def _user_graph_is_configured(self): |
| 423 | self._msg_iter = self._create_input_port_message_iterator( |
| 424 | self._input_ports['in'] |
| 425 | ) |
| 426 | |
| 427 | def _user_consume(self): |
| 428 | nonlocal can_seek_beginning |
| 429 | can_seek_beginning = self._msg_iter.can_seek_beginning |
| 430 | |
| 431 | def _user_seek_beginning(self): |
| 432 | pass |
| 433 | |
| 434 | graph = _setup_seek_test(MySink, user_seek_beginning=_user_seek_beginning) |
| 435 | can_seek_beginning = None |
| 436 | graph.run_once() |
| 437 | self.assertTrue(can_seek_beginning) |
| 438 | |
| 439 | def test_no_can_seek_beginning(self): |
| 440 | # Test an iterator without a _user_can_seek_beginning method, without |
| 441 | # a _user_seek_beginning method. |
| 442 | class MySink(bt2._UserSinkComponent): |
| 443 | def __init__(self, params, obj): |
| 444 | self._add_input_port('in') |
| 445 | |
| 446 | def _user_graph_is_configured(self): |
| 447 | self._msg_iter = self._create_input_port_message_iterator( |
| 448 | self._input_ports['in'] |
| 449 | ) |
| 450 | |
| 451 | def _user_consume(self): |
| 452 | nonlocal can_seek_beginning |
| 453 | can_seek_beginning = self._msg_iter.can_seek_beginning |
| 454 | |
| 455 | graph = _setup_seek_test(MySink) |
| 456 | can_seek_beginning = None |
| 457 | graph.run_once() |
| 458 | self.assertFalse(can_seek_beginning) |
| 459 | |
| 460 | def test_can_seek_beginning_user_error(self): |
| 461 | class MySink(bt2._UserSinkComponent): |
| 462 | def __init__(self, params, obj): |
| 463 | self._add_input_port('in') |
| 464 | |
| 465 | def _user_graph_is_configured(self): |
| 466 | self._msg_iter = self._create_input_port_message_iterator( |
| 467 | self._input_ports['in'] |
| 468 | ) |
| 469 | |
| 470 | def _user_consume(self): |
| 471 | # This is expected to raise. |
| 472 | self._msg_iter.can_seek_beginning |
| 473 | |
| 474 | def _user_can_seek_beginning(self): |
| 475 | raise ValueError('moustiquaire') |
| 476 | |
| 477 | graph = _setup_seek_test( |
| 478 | MySink, user_can_seek_beginning=_user_can_seek_beginning |
| 479 | ) |
| 480 | |
| 481 | with self.assertRaises(bt2._Error) as ctx: |
| 482 | graph.run_once() |
| 483 | |
| 484 | cause = ctx.exception[0] |
| 485 | self.assertIn('ValueError: moustiquaire', cause.message) |
| 486 | |
| 487 | def test_can_seek_beginning_wrong_return_value(self): |
| 488 | class MySink(bt2._UserSinkComponent): |
| 489 | def __init__(self, params, obj): |
| 490 | self._add_input_port('in') |
| 491 | |
| 492 | def _user_graph_is_configured(self): |
| 493 | self._msg_iter = self._create_input_port_message_iterator( |
| 494 | self._input_ports['in'] |
| 495 | ) |
| 496 | |
| 497 | def _user_consume(self): |
| 498 | # This is expected to raise. |
| 499 | self._msg_iter.can_seek_beginning |
| 500 | |
| 501 | def _user_can_seek_beginning(self): |
| 502 | return 'Amqui' |
| 503 | |
| 504 | graph = _setup_seek_test( |
| 505 | MySink, user_can_seek_beginning=_user_can_seek_beginning |
| 506 | ) |
| 507 | |
| 508 | with self.assertRaises(bt2._Error) as ctx: |
| 509 | graph.run_once() |
| 510 | |
| 511 | cause = ctx.exception[0] |
| 512 | self.assertIn("TypeError: 'str' is not a 'bool' object", cause.message) |
| 513 | |
| 514 | def test_seek_beginning(self): |
| 515 | class MySink(bt2._UserSinkComponent): |
| 516 | def __init__(self, params, obj): |
| 517 | self._add_input_port('in') |
| 518 | |
| 519 | def _user_graph_is_configured(self): |
| 520 | self._msg_iter = self._create_input_port_message_iterator( |
| 521 | self._input_ports['in'] |
| 522 | ) |
| 523 | |
| 524 | def _user_consume(self): |
| 525 | nonlocal do_seek_beginning |
| 526 | nonlocal msg |
| 527 | |
| 528 | if do_seek_beginning: |
| 529 | self._msg_iter.seek_beginning() |
| 530 | return |
| 531 | |
| 532 | msg = next(self._msg_iter) |
| 533 | |
| 534 | def _user_seek_beginning(self): |
| 535 | self._at = 0 |
| 536 | |
| 537 | msg = None |
| 538 | graph = _setup_seek_test(MySink, user_seek_beginning=_user_seek_beginning) |
| 539 | |
| 540 | # Consume message. |
| 541 | do_seek_beginning = False |
| 542 | graph.run_once() |
| 543 | self.assertIs(type(msg), bt2._StreamBeginningMessageConst) |
| 544 | |
| 545 | # Consume message. |
| 546 | graph.run_once() |
| 547 | self.assertIs(type(msg), bt2._PacketBeginningMessageConst) |
| 548 | |
| 549 | # Seek beginning. |
| 550 | do_seek_beginning = True |
| 551 | graph.run_once() |
| 552 | |
| 553 | # Consume message. |
| 554 | do_seek_beginning = False |
| 555 | graph.run_once() |
| 556 | self.assertIs(type(msg), bt2._StreamBeginningMessageConst) |
| 557 | |
| 558 | def test_seek_beginning_user_error(self): |
| 559 | class MySink(bt2._UserSinkComponent): |
| 560 | def __init__(self, params, obj): |
| 561 | self._add_input_port('in') |
| 562 | |
| 563 | def _user_graph_is_configured(self): |
| 564 | self._msg_iter = self._create_input_port_message_iterator( |
| 565 | self._input_ports['in'] |
| 566 | ) |
| 567 | |
| 568 | def _user_consume(self): |
| 569 | self._msg_iter.seek_beginning() |
| 570 | |
| 571 | def _user_seek_beginning(self): |
| 572 | raise ValueError('ouch') |
| 573 | |
| 574 | graph = _setup_seek_test(MySink, user_seek_beginning=_user_seek_beginning) |
| 575 | |
| 576 | with self.assertRaises(bt2._Error): |
| 577 | graph.run_once() |
| 578 | |
| 579 | |
| 580 | if __name__ == '__main__': |
| 581 | unittest.main() |