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
|
import pytest
import asyncio
from aiostream import stream, pipe, async_, await_
from aiostream.test_utils import assert_run, event_loop, add_resource
# Pytest fixtures
assert_run, event_loop
@pytest.mark.asyncio
async def test_chain(assert_run, event_loop):
with event_loop.assert_cleanup():
xs = stream.range(5) + stream.range(5, 10)
await assert_run(xs, list(range(10)))
with event_loop.assert_cleanup():
xs = stream.range(10, 15) | add_resource.pipe(1)
xs += stream.range(15, 20) | add_resource.pipe(1)
await assert_run(xs, list(range(10, 20)))
@pytest.mark.asyncio
async def test_zip(assert_run, event_loop):
xs = stream.range(5) | add_resource.pipe(1.0)
ys = xs | pipe.zip(xs, xs)
expected = [(x,) * 3 for x in range(5)]
await assert_run(ys, expected)
@pytest.mark.asyncio
async def test_map(assert_run, event_loop):
# Synchronous/simple
with event_loop.assert_cleanup():
xs = stream.range(5) | pipe.map(lambda x: x**2)
expected = [x**2 for x in range(5)]
await assert_run(xs, expected)
# Synchronous/multiple
with event_loop.assert_cleanup():
xs = stream.range(5)
ys = xs | pipe.map(lambda x, y: x + y, xs)
expected = [x * 2 for x in range(5)]
await assert_run(ys, expected)
# Asynchronous/simple/concurrent
with event_loop.assert_cleanup():
xs = stream.range(1, 4) | pipe.map(asyncio.sleep)
expected = [None] * 3
await assert_run(xs, expected)
assert event_loop.steps == [1, 1, 1]
# Asynchronous/simple/sequential
with event_loop.assert_cleanup():
xs = stream.range(1, 4) | pipe.map(asyncio.sleep, task_limit=1)
expected = [None] * 3
await assert_run(xs, expected)
assert event_loop.steps == [1, 2, 3]
# Asynchronous/multiple/concurrent
with event_loop.assert_cleanup():
xs = stream.range(1, 4)
ys = xs | pipe.map(asyncio.sleep, xs)
await assert_run(ys, [1, 2, 3])
assert event_loop.steps == [1, 1, 1]
# Asynchronous/multiple/sequential
with event_loop.assert_cleanup():
xs = stream.range(1, 4)
ys = xs | pipe.map(asyncio.sleep, xs, task_limit=1)
await assert_run(ys, [1, 2, 3])
assert event_loop.steps == [1, 2, 3]
# As completed
with event_loop.assert_cleanup():
xs = stream.iterate([2, 4, 1, 3, 5])
ys = xs | pipe.map(asyncio.sleep, xs, ordered=False)
await assert_run(ys, [1, 2, 3, 4, 5])
assert event_loop.steps == [1, 1, 1, 1, 1]
# Invalid argument
with pytest.raises(ValueError):
await (stream.range(1, 4) | pipe.map(asyncio.sleep, task_limit=0))
# Break
with event_loop.assert_cleanup():
xs = stream.count(1)
ys = xs | pipe.map(asyncio.sleep, xs, task_limit=10)
await assert_run(ys[:3], [1, 2, 3])
assert event_loop.steps == [1, 1, 1]
# Stuck
with event_loop.assert_cleanup():
xs = stream.count(1)
ys = xs | pipe.map(asyncio.sleep, xs, task_limit=1) | pipe.timeout(5)
await assert_run(ys, [1, 2, 3, 4], asyncio.TimeoutError())
# Force await
with event_loop.assert_cleanup():
xs = stream.iterate([1, 2, 3])
ys = xs | pipe.map(async_(lambda x: asyncio.sleep(x, x)))
await assert_run(ys, [1, 2, 3])
assert event_loop.steps == [1, 1, 1]
# Map await_
with event_loop.assert_cleanup():
xs = stream.iterate(map(lambda x: asyncio.sleep(x, x), [1, 2, 3]))
ys = xs | pipe.map(await_)
await assert_run(ys, [1, 2, 3])
assert event_loop.steps == [1, 1, 1]
@pytest.mark.asyncio
async def test_merge(assert_run, event_loop):
with event_loop.assert_cleanup():
xs = stream.range(1, 5, 2, interval=2) | pipe.delay(1)
ys = stream.range(0, 5, 2, interval=2) | pipe.merge(xs)
await assert_run(ys, [0, 1, 2, 3, 4])
assert event_loop.steps == [1, 1, 1, 1]
with event_loop.assert_cleanup():
xs = stream.range(1, 5, 2, interval=2) | pipe.delay(1)
ys = stream.range(0, 5, 2, interval=2) | pipe.merge(xs)
await assert_run(ys[:3], [0, 1, 2])
assert event_loop.steps == [1, 1]
with event_loop.assert_cleanup():
xs = stream.just(1) + stream.never()
ys = xs | pipe.merge(xs) | pipe.timeout(1)
await assert_run(ys, [1, 1], asyncio.TimeoutError())
assert event_loop.steps == [1]
# Reproduce issue #65
with event_loop.assert_cleanup():
xs = stream.iterate([1, 2])
ys = stream.iterate([3, 4])
zs = stream.merge(xs, ys) | pipe.take(3)
await assert_run(zs, [1, 2, 3])
with event_loop.assert_cleanup():
xs = stream.iterate([1, 2, 3])
ys = stream.throw(ZeroDivisionError)
zs = stream.merge(xs, ys) | pipe.delay(1) | pipe.take(3)
await assert_run(zs, [1, 2, 3])
# Silencing of a CancelledError
async def agen1():
if False:
yield
try:
await asyncio.sleep(2)
except asyncio.CancelledError:
return
async def agen2():
yield 1
with event_loop.assert_cleanup():
xs = stream.merge(agen1(), agen2()) | pipe.delay(1) | pipe.take(1)
await assert_run(xs, [1])
@pytest.mark.asyncio
async def test_ziplatest(assert_run, event_loop):
with event_loop.assert_cleanup():
xs = stream.range(0, 5, 2, interval=2)
ys = stream.range(1, 5, 2, interval=2) | pipe.delay(1)
zs = stream.ziplatest(xs, ys, default="▲")
await assert_run(zs, [(0, "▲"), (0, 1), (2, 1), (2, 3), (4, 3)])
assert event_loop.steps == [1, 1, 1, 1]
with event_loop.assert_cleanup():
xs = stream.range(0, 5, 2, interval=2)
ys = stream.range(1, 5, 2, interval=2) | pipe.delay(1)
zs = stream.ziplatest(xs, ys, partial=False)
await assert_run(zs, [(0, 1), (2, 1), (2, 3), (4, 3)])
assert event_loop.steps == [1, 1, 1, 1]
|
