/usr/lib/python2.7/dist-packages/traits/testing/tests/test_unittest_tools.py is in python-traits 4.6.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 | #------------------------------------------------------------------------------
# Copyright (c) 2005-2013, Enthought, Inc.
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in /LICENSE.txt and may be redistributed only
# under the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
# Thanks for using Enthought open source!
#------------------------------------------------------------------------------
import threading
import time
import warnings
from traits import _py2to3
from traits.testing.unittest_tools import unittest
from traits.api import (Bool, Event, Float, HasTraits, Int, List,
on_trait_change)
from traits.testing.api import UnittestTools
from traits.util.api import deprecated
@deprecated("This function is outdated. Use 'shiny' instead!")
def old_and_dull():
""" A deprecated function, for use in assertDeprecated tests.
"""
pass
class TestObject(HasTraits):
number = Float(2.0)
list_of_numbers = List(Float)
flag = Bool
@on_trait_change('number')
def _add_number_to_list(self, value):
self.list_of_numbers.append(value)
def add_to_number(self, value):
self.number += value
class UnittestToolsTestCase(unittest.TestCase, UnittestTools):
def setUp(self):
self.test_object = TestObject()
def test_when_using_with(self):
""" Check normal use cases as a context manager.
"""
test_object = self.test_object
# Change event should NOT BE detected
with self.assertTraitDoesNotChange(test_object, 'number') as result:
test_object.flag = True
test_object.number = 2.0
msg = 'The assertion result is not None: {0}'.format(result.event)
self.assertIsNone(result.event, msg=msg)
# Change event should BE detected
with self.assertTraitChanges(test_object, 'number') as result:
test_object.flag = False
test_object.number = 5.0
expected = (test_object, 'number', 2.0, 5.0)
self.assertSequenceEqual(expected, result.event)
# Change event should BE detected exactly 2 times
with self.assertTraitChanges(test_object, 'number', count=2) as result:
test_object.flag = False
test_object.number = 4.0
test_object.number = 3.0
expected = [(test_object, 'number', 5.0, 4.0),
(test_object, 'number', 4.0, 3.0)]
self.assertSequenceEqual(expected, result.events)
self.assertSequenceEqual(expected[-1], result.event)
# Change event should BE detected
with self.assertTraitChanges(test_object, 'number') as result:
test_object.flag = True
test_object.add_to_number(10.0)
expected = (test_object, 'number', 3.0, 13.0)
self.assertSequenceEqual(expected, result.event)
# Change event should BE detected exactly 3 times
with self.assertTraitChanges(test_object, 'number', count=3) as result:
test_object.flag = True
test_object.add_to_number(10.0)
test_object.add_to_number(10.0)
test_object.add_to_number(10.0)
expected = [(test_object, 'number', 13.0, 23.0),
(test_object, 'number', 23.0, 33.0),
(test_object, 'number', 33.0, 43.0)]
self.assertSequenceEqual(expected, result.events)
self.assertSequenceEqual(expected[-1], result.event)
def test_assert_multi_changes(self):
test_object = self.test_object
# Change event should NOT BE detected
with self.assertMultiTraitChanges([test_object], [],
['flag', 'number', 'list_of_numbers[]']) as results:
test_object.number = 2.0
events = filter(bool, (result.event for result in results))
msg = 'The assertion result is not None: {0}'.format(", ".join(events))
self.assertFalse(events, msg=msg)
# Change event should BE detected
with self.assertMultiTraitChanges(
[test_object], ['number', 'list_of_numbers[]'],
['flag']) as results:
test_object.number = 5.0
events = filter(bool, (result.event for result in results))
msg = 'The assertion result is None'
self.assertTrue(events, msg=msg)
def test_when_using_functions(self):
test_object = self.test_object
# Change event should BE detected
self.assertTraitChanges(test_object, 'number', 1,
test_object.add_to_number, 13.0)
# Change event should NOT BE detected
self.assertTraitDoesNotChange(test_object, 'flag',
test_object.add_to_number, 13.0)
def test_indirect_events(self):
""" Check catching indirect change events.
"""
test_object = self.test_object
# Change event should BE detected
with self.assertTraitChanges(test_object, 'list_of_numbers[]') as \
result:
test_object.flag = True
test_object.number = -3.0
expected = (test_object, 'list_of_numbers_items', [], [-3.0])
self.assertSequenceEqual(expected, result.event)
def test_exception_inside_context(self):
""" Check that exception inside the context statement block are
propagated.
"""
test_object = self.test_object
with self.assertRaises(AttributeError):
with self.assertTraitChanges(test_object, 'number'):
test_object.i_do_exist
with self.assertRaises(AttributeError):
with self.assertTraitDoesNotChange(test_object, 'number'):
test_object.i_do_exist
def test_non_change_on_failure(self):
""" Check behaviour when assertion should be raised for non trait
change.
"""
test_object = self.test_object
traits = 'flag, number'
with self.assertRaises(AssertionError):
with self.assertTraitDoesNotChange(test_object, traits) as result:
test_object.flag = True
test_object.number = -3.0
expected = [(test_object, 'flag', False, True),
(test_object, 'number', 2.0, -3.0)]
self.assertEqual(result.events, expected)
def test_change_on_failure(self):
""" Check behaviour when assertion should be raised for trait change.
"""
test_object = self.test_object
with self.assertRaises(AssertionError):
with self.assertTraitChanges(test_object, 'number') as result:
test_object.flag = True
self.assertEqual(result.events, [])
# Change event will not be fired 3 times
with self.assertRaises(AssertionError):
with self.assertTraitChanges(test_object, 'number', count=3) as \
result:
test_object.flag = True
test_object.add_to_number(10.0)
test_object.add_to_number(10.0)
expected = [(test_object, 'number', 2.0, 12.0),
(test_object, 'number', 12.0, 22.0)]
self.assertSequenceEqual(expected, result.events)
def test_asserts_in_context_block(self):
""" Make sure that the traits context manager does not stop
regular assertions inside the managed code block from happening.
"""
test_object = TestObject(number=16.0)
with self.assertTraitDoesNotChange(test_object, 'number'):
self.assertEqual(test_object.number, 16.0)
with self.assertRaisesRegexp(AssertionError, '16\.0 != 12\.0'):
with self.assertTraitDoesNotChange(test_object, 'number'):
self.assertEqual(test_object.number, 12.0)
def test_special_case_for_count(self):
""" Count equal to 0 should be valid but it is discouraged.
"""
test_object = TestObject(number=16.0)
with self.assertTraitChanges(test_object, 'number', count=0):
test_object.flag = True
def test_assert_trait_changes_async(self):
# Exercise assertTraitChangesAsync.
thread_count = 10
events_per_thread = 1000
class A(HasTraits):
event = Event
a = A()
def thread_target(obj, count):
"Fire obj.event 'count' times."
for _ in xrange(count):
obj.event = True
threads = [
threading.Thread(target=thread_target, args=(a, events_per_thread))
for _ in xrange(thread_count)
]
expected_count = thread_count * events_per_thread
with self.assertTraitChangesAsync(
a, 'event', expected_count, timeout=60.0):
for t in threads:
t.start()
for t in threads:
t.join()
def test_assert_trait_changes_async_events(self):
# Check access to the events after the with
# block completes.
thread_count = 10
events_per_thread = 100
class A(HasTraits):
event = Event(Int)
a = A()
def thread_target(obj, count):
"Fire obj.event 'count' times."
for n in xrange(count):
time.sleep(0.001)
obj.event = n
threads = [
threading.Thread(target=thread_target, args=(a, events_per_thread))
for _ in xrange(thread_count)
]
expected_count = thread_count * events_per_thread
with self.assertTraitChangesAsync(
a, 'event', expected_count, timeout=60.0) as event_collector:
for t in threads:
t.start()
for t in threads:
t.join()
_py2to3.assertCountEqual(
self,
event_collector.events,
range(events_per_thread) * thread_count,
)
def test_assert_trait_changes_async_failure(self):
# Exercise assertTraitChangesAsync.
thread_count = 10
events_per_thread = 10000
class A(HasTraits):
event = Event
a = A()
def thread_target(obj, count):
"Fire obj.event 'count' times."
for _ in xrange(count):
obj.event = True
threads = [
threading.Thread(target=thread_target, args=(a, events_per_thread))
for _ in xrange(thread_count)
]
expected_count = thread_count * events_per_thread
with self.assertRaises(AssertionError):
with self.assertTraitChangesAsync(a, 'event', expected_count + 1):
for t in threads:
t.start()
for t in threads:
t.join()
def test_assert_eventually_true_fails_on_timeout(self):
class A(HasTraits):
foo = Bool(False)
a = A()
def condition(a_object):
return a_object.foo
with self.assertRaises(self.failureException):
self.assertEventuallyTrue(
condition=condition,
obj=a,
trait='foo',
timeout=1.0,
)
def test_assert_eventually_true_passes_when_condition_becomes_true(self):
class A(HasTraits):
foo = Bool(False)
def condition(a_object):
return a_object.foo
a = A()
def thread_target(a):
time.sleep(1.0)
a.foo = True
t = threading.Thread(target=thread_target, args=(a,))
t.start()
self.assertEventuallyTrue(
condition=condition,
obj=a,
trait='foo',
timeout=10.0,
)
t.join()
def test_assert_eventually_true_passes_when_condition_starts_true(self):
class A(HasTraits):
foo = Bool(True)
def condition(a_object):
return a_object.foo
a = A()
self.assertEventuallyTrue(
condition=condition,
obj=a,
trait='foo',
timeout=10.0,
)
def test_assert_deprecated(self):
with self.assertDeprecated():
old_and_dull()
def test_assert_deprecated_failures(self):
with self.assertRaises(self.failureException):
with self.assertDeprecated():
pass
def test_assert_deprecated_when_warning_already_issued(self):
# Exercise a problematic case where previous calls to a function or
# method that issues a DeprecationWarning have already polluted the
# __warningregistry__. For this, we need a single call-point to
# old_and_dull, since distinct call-points have separate entries in
# __warningregistry__.
def old_and_dull_caller():
old_and_dull()
# Pollute the registry by pre-calling the function.
old_and_dull_caller()
# Check that we can still detect the DeprecationWarning.
with self.assertDeprecated():
old_and_dull_caller()
def test_assert_not_deprecated_failures(self):
with self.assertRaises(self.failureException):
with self.assertNotDeprecated():
old_and_dull()
def test_assert_not_deprecated(self):
with self.assertNotDeprecated():
pass
def test_assert_not_deprecated_when_warning_already_issued(self):
# Exercise a problematic case where previous calls to a function or
# method that issues a DeprecationWarning have already polluted the
# __warningregistry__. For this, we need a single call-point to
# old_and_dull, since distinct call-points have separate entries in
# __warningregistry__.
def old_and_dull_caller():
old_and_dull()
# Pollute the registry by pre-calling the function.
old_and_dull_caller()
# Check that we can still detect the DeprecationWarning.
with self.assertRaises(self.failureException):
with self.assertNotDeprecated():
old_and_dull_caller()
if __name__ == '__main__':
unittest.main()
|