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
|
"""Test if pytestmark works when defined on a class."""
from __future__ import annotations
import asyncio
from textwrap import dedent
import pytest
class TestPyTestMark:
pytestmark = pytest.mark.asyncio
async def test_is_asyncio(self, sample_fixture):
assert asyncio.get_event_loop()
counter = 1
async def inc():
nonlocal counter
counter += 1
await asyncio.sleep(0)
await asyncio.ensure_future(inc())
assert counter == 2
@pytest.fixture
def sample_fixture():
return None
def test_asyncio_mark_provides_class_scoped_loop_when_applied_to_functions(
pytester: pytest.Pytester,
):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
dedent(
"""\
import asyncio
import pytest
class TestClassScopedLoop:
loop: asyncio.AbstractEventLoop
@pytest.mark.asyncio(loop_scope="class")
async def test_remember_loop(self):
TestClassScopedLoop.loop = asyncio.get_running_loop()
@pytest.mark.asyncio(loop_scope="class")
async def test_this_runs_in_same_loop(self):
assert asyncio.get_running_loop() is TestClassScopedLoop.loop
"""
)
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(passed=2)
def test_asyncio_mark_provides_class_scoped_loop_when_applied_to_class(
pytester: pytest.Pytester,
):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
dedent(
"""\
import asyncio
import pytest
@pytest.mark.asyncio(loop_scope="class")
class TestClassScopedLoop:
loop: asyncio.AbstractEventLoop
async def test_remember_loop(self):
TestClassScopedLoop.loop = asyncio.get_running_loop()
async def test_this_runs_in_same_loop(self):
assert asyncio.get_running_loop() is TestClassScopedLoop.loop
"""
)
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(passed=2)
def test_asyncio_mark_raises_when_class_scoped_is_request_without_class(
pytester: pytest.Pytester,
):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
dedent(
"""\
import asyncio
import pytest
@pytest.mark.asyncio(loop_scope="class")
async def test_has_no_surrounding_class():
pass
"""
)
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(errors=1)
result.stdout.fnmatch_lines(
"*is marked to be run in an event loop with scope*",
)
def test_asyncio_mark_is_inherited_to_subclasses(pytester: pytest.Pytester):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
dedent(
"""\
import asyncio
import pytest
@pytest.mark.asyncio(loop_scope="class")
class TestSuperClassWithMark:
pass
class TestWithoutMark(TestSuperClassWithMark):
loop: asyncio.AbstractEventLoop
async def test_remember_loop(self):
TestWithoutMark.loop = asyncio.get_running_loop()
async def test_this_runs_in_same_loop(self):
assert asyncio.get_running_loop() is TestWithoutMark.loop
"""
)
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(passed=2)
def test_asyncio_mark_respects_the_loop_policy(
pytester: pytest.Pytester,
):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
dedent(
"""\
import asyncio
import pytest
class CustomEventLoopPolicy(asyncio.DefaultEventLoopPolicy):
pass
class TestUsesCustomEventLoop:
@pytest.fixture(scope="class")
def event_loop_policy(self):
return CustomEventLoopPolicy()
@pytest.mark.asyncio
async def test_uses_custom_event_loop_policy(self):
assert isinstance(
asyncio.get_event_loop_policy(),
CustomEventLoopPolicy,
)
@pytest.mark.asyncio
async def test_does_not_use_custom_event_loop_policy():
assert not isinstance(
asyncio.get_event_loop_policy(),
CustomEventLoopPolicy,
)
"""
)
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(passed=2)
def test_asyncio_mark_respects_parametrized_loop_policies(
pytester: pytest.Pytester,
):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
dedent(
"""\
import asyncio
import pytest
@pytest.fixture(
scope="class",
params=[
asyncio.DefaultEventLoopPolicy(),
asyncio.DefaultEventLoopPolicy(),
]
)
def event_loop_policy(request):
return request.param
@pytest.mark.asyncio(loop_scope="class")
class TestWithDifferentLoopPolicies:
async def test_parametrized_loop(self, request):
pass
"""
)
)
result = pytester.runpytest_subprocess("--asyncio-mode=strict")
result.assert_outcomes(passed=2)
def test_asyncio_mark_provides_class_scoped_loop_to_fixtures(
pytester: pytest.Pytester,
):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
dedent(
"""\
import asyncio
import pytest
import pytest_asyncio
@pytest.mark.asyncio(loop_scope="class")
class TestClassScopedLoop:
loop: asyncio.AbstractEventLoop
@pytest_asyncio.fixture
async def my_fixture(self):
TestClassScopedLoop.loop = asyncio.get_running_loop()
@pytest.mark.asyncio
async def test_runs_is_same_loop_as_fixture(self, my_fixture):
assert asyncio.get_running_loop() is TestClassScopedLoop.loop
"""
)
)
result = pytester.runpytest_subprocess("--asyncio-mode=strict")
result.assert_outcomes(passed=1)
def test_asyncio_mark_allows_combining_class_scoped_fixture_with_function_scoped_test(
pytester: pytest.Pytester,
):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
dedent(
"""\
import asyncio
import pytest
import pytest_asyncio
loop: asyncio.AbstractEventLoop
class TestMixedScopes:
@pytest_asyncio.fixture(loop_scope="class", scope="class")
async def async_fixture(self):
global loop
loop = asyncio.get_running_loop()
@pytest.mark.asyncio(loop_scope="function")
async def test_runs_in_different_loop_as_fixture(self, async_fixture):
global loop
assert asyncio.get_running_loop() is not loop
"""
),
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(passed=1)
def test_asyncio_mark_handles_missing_event_loop_triggered_by_fixture(
pytester: pytest.Pytester,
):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
dedent(
"""\
import pytest
import asyncio
class TestClass:
@pytest.fixture(scope="class")
def sets_event_loop_to_none(self):
# asyncio.run() creates a new event loop without closing the
# existing one. For any test, but the first one, this leads to
# a ResourceWarning when the discarded loop is destroyed by the
# garbage collector. We close the current loop to avoid this.
try:
asyncio.get_event_loop().close()
except RuntimeError:
pass
return asyncio.run(asyncio.sleep(0))
# asyncio.run() sets the current event loop to None when finished
@pytest.mark.asyncio(loop_scope="class")
# parametrization may impact fixture ordering
@pytest.mark.parametrize("n", (0, 1))
async def test_does_not_fail(self, sets_event_loop_to_none, n):
pass
"""
)
)
result = pytester.runpytest("--asyncio-mode=strict")
result.assert_outcomes(passed=2)
def test_standalone_test_does_not_trigger_warning_about_no_current_event_loop_being_set(
pytester: pytest.Pytester,
):
pytester.makeini("[pytest]\nasyncio_default_fixture_loop_scope = function")
pytester.makepyfile(
dedent(
"""\
import pytest
@pytest.mark.asyncio(loop_scope="class")
class TestClass:
async def test_anything(self):
pass
"""
)
)
result = pytester.runpytest_subprocess("--asyncio-mode=strict")
result.assert_outcomes(warnings=0, passed=1)
|
