| 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 | from bt2 import value |
| 20 | import collections |
| 21 | import unittest |
| 22 | import copy |
| 23 | import bt2 |
| 24 | |
| 25 | |
| 26 | class _MyIter(bt2._UserMessageIterator): |
| 27 | def __init__(self, self_output_port): |
| 28 | self._build_meta() |
| 29 | self._at = 0 |
| 30 | |
| 31 | def _build_meta(self): |
| 32 | self._tc = self._component._create_trace_class() |
| 33 | self._t = self._tc() |
| 34 | self._sc = self._tc.create_stream_class(supports_packets=True) |
| 35 | self._ec = self._sc.create_event_class(name='salut') |
| 36 | self._my_int_ft = self._tc.create_signed_integer_field_class(32) |
| 37 | payload_ft = self._tc.create_structure_field_class() |
| 38 | payload_ft += [('my_int', self._my_int_ft)] |
| 39 | self._ec.payload_field_type = payload_ft |
| 40 | self._stream = self._t.create_stream(self._sc) |
| 41 | self._packet = self._stream.create_packet() |
| 42 | |
| 43 | def _create_event(self, value): |
| 44 | ev = self._ec() |
| 45 | ev.payload_field['my_int'] = value |
| 46 | ev.packet = self._packet |
| 47 | return ev |
| 48 | |
| 49 | |
| 50 | class GraphTestCase(unittest.TestCase): |
| 51 | def setUp(self): |
| 52 | self._graph = bt2.Graph() |
| 53 | |
| 54 | def tearDown(self): |
| 55 | del self._graph |
| 56 | |
| 57 | def test_create_empty(self): |
| 58 | graph = bt2.Graph() |
| 59 | |
| 60 | def test_add_component_user_cls(self): |
| 61 | class MySink(bt2._UserSinkComponent): |
| 62 | def _consume(self): |
| 63 | pass |
| 64 | |
| 65 | def _graph_is_configured(self): |
| 66 | pass |
| 67 | |
| 68 | comp = self._graph.add_component(MySink, 'salut') |
| 69 | self.assertEqual(comp.name, 'salut') |
| 70 | |
| 71 | def test_add_component_gen_cls(self): |
| 72 | class MySink(bt2._UserSinkComponent): |
| 73 | def _consume(self): |
| 74 | pass |
| 75 | |
| 76 | def _graph_is_configured(self): |
| 77 | pass |
| 78 | |
| 79 | comp = self._graph.add_component(MySink, 'salut') |
| 80 | assert comp |
| 81 | comp2 = self._graph.add_component(comp.cls, 'salut2') |
| 82 | self.assertEqual(comp2.name, 'salut2') |
| 83 | |
| 84 | def test_add_component_params(self): |
| 85 | comp_params = None |
| 86 | |
| 87 | class MySink(bt2._UserSinkComponent): |
| 88 | def __init__(self, params): |
| 89 | nonlocal comp_params |
| 90 | comp_params = params |
| 91 | |
| 92 | def _consume(self): |
| 93 | pass |
| 94 | |
| 95 | def _graph_is_configured(self): |
| 96 | pass |
| 97 | |
| 98 | params = {'hello': 23, 'path': '/path/to/stuff'} |
| 99 | comp = self._graph.add_component(MySink, 'salut', params) |
| 100 | self.assertEqual(params, comp_params) |
| 101 | del comp_params |
| 102 | |
| 103 | def test_add_component_invalid_cls_type(self): |
| 104 | with self.assertRaises(TypeError): |
| 105 | self._graph.add_component(int, 'salut') |
| 106 | |
| 107 | def test_add_component_invalid_logging_level_type(self): |
| 108 | class MySink(bt2._UserSinkComponent): |
| 109 | def _consume(self): |
| 110 | pass |
| 111 | |
| 112 | def _graph_is_configured(self): |
| 113 | pass |
| 114 | |
| 115 | with self.assertRaises(TypeError): |
| 116 | self._graph.add_component(MySink, 'salut', logging_level='yo') |
| 117 | |
| 118 | def test_add_component_invalid_logging_level_value(self): |
| 119 | class MySink(bt2._UserSinkComponent): |
| 120 | def _consume(self): |
| 121 | pass |
| 122 | |
| 123 | def _graph_is_configured(self): |
| 124 | pass |
| 125 | |
| 126 | with self.assertRaises(ValueError): |
| 127 | self._graph.add_component(MySink, 'salut', logging_level=12345) |
| 128 | |
| 129 | def test_add_component_logging_level(self): |
| 130 | class MySink(bt2._UserSinkComponent): |
| 131 | def _consume(self): |
| 132 | pass |
| 133 | |
| 134 | def _graph_is_configured(self): |
| 135 | pass |
| 136 | |
| 137 | comp = self._graph.add_component( |
| 138 | MySink, 'salut', logging_level=bt2.LoggingLevel.DEBUG |
| 139 | ) |
| 140 | self.assertEqual(comp.logging_level, bt2.LoggingLevel.DEBUG) |
| 141 | |
| 142 | def test_connect_ports(self): |
| 143 | class MyIter(bt2._UserMessageIterator): |
| 144 | def __next__(self): |
| 145 | raise bt2.Stop |
| 146 | |
| 147 | class MySource(bt2._UserSourceComponent, message_iterator_class=MyIter): |
| 148 | def __init__(self, params): |
| 149 | self._add_output_port('out') |
| 150 | |
| 151 | class MySink(bt2._UserSinkComponent): |
| 152 | def __init__(self, params): |
| 153 | self._add_input_port('in') |
| 154 | |
| 155 | def _consume(self): |
| 156 | raise bt2.Stop |
| 157 | |
| 158 | def _graph_is_configured(self): |
| 159 | pass |
| 160 | |
| 161 | src = self._graph.add_component(MySource, 'src') |
| 162 | sink = self._graph.add_component(MySink, 'sink') |
| 163 | |
| 164 | conn = self._graph.connect_ports( |
| 165 | src.output_ports['out'], sink.input_ports['in'] |
| 166 | ) |
| 167 | self.assertTrue(src.output_ports['out'].is_connected) |
| 168 | self.assertTrue(sink.input_ports['in'].is_connected) |
| 169 | self.assertEqual(src.output_ports['out'].connection.addr, conn.addr) |
| 170 | self.assertEqual(sink.input_ports['in'].connection.addr, conn.addr) |
| 171 | |
| 172 | def test_connect_ports_invalid_direction(self): |
| 173 | class MyIter(bt2._UserMessageIterator): |
| 174 | def __next__(self): |
| 175 | raise bt2.Stop |
| 176 | |
| 177 | class MySource(bt2._UserSourceComponent, message_iterator_class=MyIter): |
| 178 | def __init__(self, params): |
| 179 | self._add_output_port('out') |
| 180 | |
| 181 | class MySink(bt2._UserSinkComponent): |
| 182 | def __init__(self, params): |
| 183 | self._add_input_port('in') |
| 184 | |
| 185 | def _consume(self): |
| 186 | raise bt2.Stop |
| 187 | |
| 188 | def _graph_is_configured(self): |
| 189 | pass |
| 190 | |
| 191 | src = self._graph.add_component(MySource, 'src') |
| 192 | sink = self._graph.add_component(MySink, 'sink') |
| 193 | |
| 194 | with self.assertRaises(TypeError): |
| 195 | conn = self._graph.connect_ports( |
| 196 | sink.input_ports['in'], src.output_ports['out'] |
| 197 | ) |
| 198 | |
| 199 | def test_add_interrupter(self): |
| 200 | class MyIter(bt2._UserMessageIterator): |
| 201 | def __next__(self): |
| 202 | raise TypeError |
| 203 | |
| 204 | class MySource(bt2._UserSourceComponent, message_iterator_class=MyIter): |
| 205 | def __init__(self, params): |
| 206 | self._add_output_port('out') |
| 207 | |
| 208 | class MySink(bt2._UserSinkComponent): |
| 209 | def __init__(self, params): |
| 210 | self._add_input_port('in') |
| 211 | |
| 212 | def _consume(self): |
| 213 | next(self._msg_iter) |
| 214 | |
| 215 | def _graph_is_configured(self): |
| 216 | self._msg_iter = self._create_input_port_message_iterator( |
| 217 | self._input_ports['in'] |
| 218 | ) |
| 219 | |
| 220 | # add two interrupters, set one of them |
| 221 | interrupter1 = bt2.Interrupter() |
| 222 | interrupter2 = bt2.Interrupter() |
| 223 | self._graph.add_interrupter(interrupter1) |
| 224 | src = self._graph.add_component(MySource, 'src') |
| 225 | sink = self._graph.add_component(MySink, 'sink') |
| 226 | self._graph.connect_ports(src.output_ports['out'], sink.input_ports['in']) |
| 227 | self._graph.add_interrupter(interrupter2) |
| 228 | |
| 229 | with self.assertRaises(bt2._Error): |
| 230 | self._graph.run() |
| 231 | |
| 232 | interrupter2.set() |
| 233 | |
| 234 | with self.assertRaises(bt2.TryAgain): |
| 235 | self._graph.run() |
| 236 | |
| 237 | interrupter2.reset() |
| 238 | |
| 239 | with self.assertRaises(bt2._Error): |
| 240 | self._graph.run() |
| 241 | |
| 242 | # Test that Graph.run() raises bt2.Interrupted if the graph gets |
| 243 | # interrupted during execution. |
| 244 | def test_interrupt_while_running(self): |
| 245 | class MyIter(_MyIter): |
| 246 | def __next__(self): |
| 247 | return self._create_stream_beginning_message(self._stream) |
| 248 | |
| 249 | class MySource(bt2._UserSourceComponent, message_iterator_class=MyIter): |
| 250 | def __init__(self, params): |
| 251 | self._add_output_port('out') |
| 252 | |
| 253 | class MySink(bt2._UserSinkComponent): |
| 254 | def __init__(self, params): |
| 255 | self._add_input_port('in') |
| 256 | |
| 257 | def _consume(self): |
| 258 | # Pretend that somebody asynchronously interrupted the graph. |
| 259 | nonlocal graph |
| 260 | graph.interrupt() |
| 261 | return next(self._msg_iter) |
| 262 | |
| 263 | def _graph_is_configured(self): |
| 264 | self._msg_iter = self._create_input_port_message_iterator( |
| 265 | self._input_ports['in'] |
| 266 | ) |
| 267 | |
| 268 | graph = self._graph |
| 269 | up = self._graph.add_component(MySource, 'down') |
| 270 | down = self._graph.add_component(MySink, 'up') |
| 271 | self._graph.connect_ports(up.output_ports['out'], down.input_ports['in']) |
| 272 | |
| 273 | with self.assertRaises(bt2.TryAgain): |
| 274 | self._graph.run() |
| 275 | |
| 276 | def test_run(self): |
| 277 | class MyIter(_MyIter): |
| 278 | def __next__(self): |
| 279 | if self._at == 9: |
| 280 | raise StopIteration |
| 281 | |
| 282 | if self._at == 0: |
| 283 | msg = self._create_stream_beginning_message(self._stream) |
| 284 | elif self._at == 1: |
| 285 | msg = self._create_packet_beginning_message(self._packet) |
| 286 | elif self._at == 7: |
| 287 | msg = self._create_packet_end_message(self._packet) |
| 288 | elif self._at == 8: |
| 289 | msg = self._create_stream_end_message(self._stream) |
| 290 | else: |
| 291 | msg = self._create_event_message(self._ec, self._packet) |
| 292 | |
| 293 | self._at += 1 |
| 294 | return msg |
| 295 | |
| 296 | class MySource(bt2._UserSourceComponent, message_iterator_class=MyIter): |
| 297 | def __init__(self, params): |
| 298 | self._add_output_port('out') |
| 299 | |
| 300 | class MySink(bt2._UserSinkComponent): |
| 301 | def __init__(self, params): |
| 302 | self._input_port = self._add_input_port('in') |
| 303 | self._at = 0 |
| 304 | |
| 305 | def _consume(comp_self): |
| 306 | msg = next(comp_self._msg_iter) |
| 307 | |
| 308 | if comp_self._at == 0: |
| 309 | self.assertIsInstance(msg, bt2.message._StreamBeginningMessage) |
| 310 | elif comp_self._at == 1: |
| 311 | self.assertIsInstance(msg, bt2.message._PacketBeginningMessage) |
| 312 | elif comp_self._at >= 2 and comp_self._at <= 6: |
| 313 | self.assertIsInstance(msg, bt2.message._EventMessage) |
| 314 | self.assertEqual(msg.event.cls.name, 'salut') |
| 315 | elif comp_self._at == 7: |
| 316 | self.assertIsInstance(msg, bt2.message._PacketEndMessage) |
| 317 | elif comp_self._at == 8: |
| 318 | self.assertIsInstance(msg, bt2.message._StreamEndMessage) |
| 319 | |
| 320 | comp_self._at += 1 |
| 321 | |
| 322 | def _graph_is_configured(self): |
| 323 | self._msg_iter = self._create_input_port_message_iterator( |
| 324 | self._input_port |
| 325 | ) |
| 326 | |
| 327 | src = self._graph.add_component(MySource, 'src') |
| 328 | sink = self._graph.add_component(MySink, 'sink') |
| 329 | conn = self._graph.connect_ports( |
| 330 | src.output_ports['out'], sink.input_ports['in'] |
| 331 | ) |
| 332 | self._graph.run() |
| 333 | |
| 334 | def test_run_again(self): |
| 335 | class MyIter(_MyIter): |
| 336 | def __next__(self): |
| 337 | if self._at == 3: |
| 338 | raise bt2.TryAgain |
| 339 | |
| 340 | if self._at == 0: |
| 341 | msg = self._create_stream_beginning_message(self._stream) |
| 342 | elif self._at == 1: |
| 343 | msg = self._create_packet_beginning_message(self._packet) |
| 344 | elif self._at == 2: |
| 345 | msg = self._create_event_message(self._ec, self._packet) |
| 346 | |
| 347 | self._at += 1 |
| 348 | return msg |
| 349 | |
| 350 | class MySource(bt2._UserSourceComponent, message_iterator_class=MyIter): |
| 351 | def __init__(self, params): |
| 352 | self._add_output_port('out') |
| 353 | |
| 354 | class MySink(bt2._UserSinkComponent): |
| 355 | def __init__(self, params): |
| 356 | self._input_port = self._add_input_port('in') |
| 357 | self._at = 0 |
| 358 | |
| 359 | def _consume(comp_self): |
| 360 | msg = next(comp_self._msg_iter) |
| 361 | if comp_self._at == 0: |
| 362 | self.assertIsInstance(msg, bt2.message._StreamBeginningMessage) |
| 363 | elif comp_self._at == 1: |
| 364 | self.assertIsInstance(msg, bt2.message._PacketBeginningMessage) |
| 365 | elif comp_self._at == 2: |
| 366 | self.assertIsInstance(msg, bt2.message._EventMessage) |
| 367 | raise bt2.TryAgain |
| 368 | else: |
| 369 | pass |
| 370 | |
| 371 | comp_self._at += 1 |
| 372 | |
| 373 | def _graph_is_configured(self): |
| 374 | self._msg_iter = self._create_input_port_message_iterator( |
| 375 | self._input_port |
| 376 | ) |
| 377 | |
| 378 | src = self._graph.add_component(MySource, 'src') |
| 379 | sink = self._graph.add_component(MySink, 'sink') |
| 380 | conn = self._graph.connect_ports( |
| 381 | src.output_ports['out'], sink.input_ports['in'] |
| 382 | ) |
| 383 | |
| 384 | with self.assertRaises(bt2.TryAgain): |
| 385 | self._graph.run() |
| 386 | |
| 387 | def test_run_error(self): |
| 388 | raised_in_sink = False |
| 389 | |
| 390 | class MyIter(_MyIter): |
| 391 | def __next__(self): |
| 392 | # If this gets called after the sink raised an exception, it is |
| 393 | # an error. |
| 394 | nonlocal raised_in_sink |
| 395 | assert raised_in_sink is False |
| 396 | |
| 397 | if self._at == 0: |
| 398 | msg = self._create_stream_beginning_message(self._stream) |
| 399 | elif self._at == 1: |
| 400 | msg = self._create_packet_beginning_message(self._packet) |
| 401 | elif self._at == 2 or self._at == 3: |
| 402 | msg = self._create_event_message(self._ec, self._packet) |
| 403 | else: |
| 404 | raise bt2.TryAgain |
| 405 | self._at += 1 |
| 406 | return msg |
| 407 | |
| 408 | class MySource(bt2._UserSourceComponent, message_iterator_class=MyIter): |
| 409 | def __init__(self, params): |
| 410 | self._add_output_port('out') |
| 411 | |
| 412 | class MySink(bt2._UserSinkComponent): |
| 413 | def __init__(self, params): |
| 414 | self._input_port = self._add_input_port('in') |
| 415 | self._at = 0 |
| 416 | |
| 417 | def _consume(comp_self): |
| 418 | msg = next(comp_self._msg_iter) |
| 419 | if comp_self._at == 0: |
| 420 | self.assertIsInstance(msg, bt2.message._StreamBeginningMessage) |
| 421 | elif comp_self._at == 1: |
| 422 | self.assertIsInstance(msg, bt2.message._PacketBeginningMessage) |
| 423 | elif comp_self._at == 2: |
| 424 | self.assertIsInstance(msg, bt2.message._EventMessage) |
| 425 | elif comp_self._at == 3: |
| 426 | nonlocal raised_in_sink |
| 427 | raised_in_sink = True |
| 428 | raise RuntimeError('error!') |
| 429 | |
| 430 | comp_self._at += 1 |
| 431 | |
| 432 | def _graph_is_configured(self): |
| 433 | self._msg_iter = self._create_input_port_message_iterator( |
| 434 | self._input_port |
| 435 | ) |
| 436 | |
| 437 | src = self._graph.add_component(MySource, 'src') |
| 438 | sink = self._graph.add_component(MySink, 'sink') |
| 439 | conn = self._graph.connect_ports( |
| 440 | src.output_ports['out'], sink.input_ports['in'] |
| 441 | ) |
| 442 | |
| 443 | with self.assertRaises(bt2._Error): |
| 444 | self._graph.run() |
| 445 | |
| 446 | def test_listeners(self): |
| 447 | class MyIter(bt2._UserMessageIterator): |
| 448 | def __next__(self): |
| 449 | raise bt2.Stop |
| 450 | |
| 451 | class MySource(bt2._UserSourceComponent, message_iterator_class=MyIter): |
| 452 | def __init__(self, params): |
| 453 | self._add_output_port('out') |
| 454 | self._add_output_port('zero') |
| 455 | |
| 456 | class MySink(bt2._UserSinkComponent): |
| 457 | def __init__(self, params): |
| 458 | self._add_input_port('in') |
| 459 | |
| 460 | def _consume(self): |
| 461 | raise bt2.Stop |
| 462 | |
| 463 | def _graph_is_configured(self): |
| 464 | pass |
| 465 | |
| 466 | def _port_connected(self, port, other_port): |
| 467 | self._add_input_port('taste') |
| 468 | |
| 469 | def port_added_listener(component, port): |
| 470 | nonlocal calls |
| 471 | calls.append((port_added_listener, component, port)) |
| 472 | |
| 473 | def ports_connected_listener( |
| 474 | upstream_component, upstream_port, downstream_component, downstream_port |
| 475 | ): |
| 476 | nonlocal calls |
| 477 | calls.append( |
| 478 | ( |
| 479 | ports_connected_listener, |
| 480 | upstream_component, |
| 481 | upstream_port, |
| 482 | downstream_component, |
| 483 | downstream_port, |
| 484 | ) |
| 485 | ) |
| 486 | |
| 487 | calls = [] |
| 488 | self._graph.add_port_added_listener(port_added_listener) |
| 489 | self._graph.add_ports_connected_listener(ports_connected_listener) |
| 490 | src = self._graph.add_component(MySource, 'src') |
| 491 | sink = self._graph.add_component(MySink, 'sink') |
| 492 | self._graph.connect_ports(src.output_ports['out'], sink.input_ports['in']) |
| 493 | |
| 494 | self.assertEqual(len(calls), 5) |
| 495 | |
| 496 | self.assertIs(calls[0][0], port_added_listener) |
| 497 | self.assertEqual(calls[0][1].name, 'src') |
| 498 | self.assertEqual(calls[0][2].name, 'out') |
| 499 | |
| 500 | self.assertIs(calls[1][0], port_added_listener) |
| 501 | self.assertEqual(calls[1][1].name, 'src') |
| 502 | self.assertEqual(calls[1][2].name, 'zero') |
| 503 | |
| 504 | self.assertIs(calls[2][0], port_added_listener) |
| 505 | self.assertEqual(calls[2][1].name, 'sink') |
| 506 | self.assertEqual(calls[2][2].name, 'in') |
| 507 | |
| 508 | self.assertIs(calls[3][0], port_added_listener) |
| 509 | self.assertEqual(calls[3][1].name, 'sink') |
| 510 | self.assertEqual(calls[3][2].name, 'taste') |
| 511 | |
| 512 | self.assertIs(calls[4][0], ports_connected_listener) |
| 513 | self.assertEqual(calls[4][1].name, 'src') |
| 514 | self.assertEqual(calls[4][2].name, 'out') |
| 515 | self.assertEqual(calls[4][3].name, 'sink') |
| 516 | self.assertEqual(calls[4][4].name, 'in') |
| 517 | |
| 518 | def test_invalid_listeners(self): |
| 519 | class MyIter(bt2._UserMessageIterator): |
| 520 | def __next__(self): |
| 521 | raise bt2.Stop |
| 522 | |
| 523 | class MySource(bt2._UserSourceComponent, message_iterator_class=MyIter): |
| 524 | def __init__(self, params): |
| 525 | self._add_output_port('out') |
| 526 | self._add_output_port('zero') |
| 527 | |
| 528 | class MySink(bt2._UserSinkComponent): |
| 529 | def __init__(self, params): |
| 530 | self._add_input_port('in') |
| 531 | |
| 532 | def _consume(self): |
| 533 | raise bt2.Stop |
| 534 | |
| 535 | def _graph_is_configured(self): |
| 536 | pass |
| 537 | |
| 538 | def _port_connected(self, port, other_port): |
| 539 | self._add_input_port('taste') |
| 540 | |
| 541 | with self.assertRaises(TypeError): |
| 542 | self._graph.add_port_added_listener(1234) |
| 543 | with self.assertRaises(TypeError): |
| 544 | self._graph.add_ports_connected_listener(1234) |
| 545 | |
| 546 | def test_raise_in_component_init(self): |
| 547 | class MySink(bt2._UserSinkComponent): |
| 548 | def __init__(self, params): |
| 549 | raise ValueError('oops!') |
| 550 | |
| 551 | def _consume(self): |
| 552 | raise bt2.Stop |
| 553 | |
| 554 | def _graph_is_configured(self): |
| 555 | pass |
| 556 | |
| 557 | graph = bt2.Graph() |
| 558 | |
| 559 | with self.assertRaises(bt2._Error): |
| 560 | graph.add_component(MySink, 'comp') |
| 561 | |
| 562 | def test_raise_in_port_added_listener(self): |
| 563 | class MySink(bt2._UserSinkComponent): |
| 564 | def __init__(self, params): |
| 565 | self._add_input_port('in') |
| 566 | |
| 567 | def _consume(self): |
| 568 | raise bt2.Stop |
| 569 | |
| 570 | def _graph_is_configured(self): |
| 571 | pass |
| 572 | |
| 573 | def port_added_listener(component, port): |
| 574 | raise ValueError('oh noes!') |
| 575 | |
| 576 | graph = bt2.Graph() |
| 577 | graph.add_port_added_listener(port_added_listener) |
| 578 | |
| 579 | with self.assertRaises(bt2._Error): |
| 580 | graph.add_component(MySink, 'comp') |
| 581 | |
| 582 | def test_raise_in_ports_connected_listener(self): |
| 583 | class MyIter(bt2._UserMessageIterator): |
| 584 | def __next__(self): |
| 585 | raise bt2.Stop |
| 586 | |
| 587 | class MySource(bt2._UserSourceComponent, message_iterator_class=MyIter): |
| 588 | def __init__(self, params): |
| 589 | self._add_output_port('out') |
| 590 | |
| 591 | class MySink(bt2._UserSinkComponent): |
| 592 | def __init__(self, params): |
| 593 | self._add_input_port('in') |
| 594 | |
| 595 | def _consume(self): |
| 596 | raise bt2.Stop |
| 597 | |
| 598 | def _graph_is_configured(self): |
| 599 | pass |
| 600 | |
| 601 | def ports_connected_listener( |
| 602 | upstream_component, upstream_port, downstream_component, downstream_port |
| 603 | ): |
| 604 | raise ValueError('oh noes!') |
| 605 | |
| 606 | graph = bt2.Graph() |
| 607 | graph.add_ports_connected_listener(ports_connected_listener) |
| 608 | up = graph.add_component(MySource, 'down') |
| 609 | down = graph.add_component(MySink, 'up') |
| 610 | |
| 611 | with self.assertRaises(bt2._Error): |
| 612 | graph.connect_ports(up.output_ports['out'], down.input_ports['in']) |