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
|
"""test the IPython Kernel"""
#-------------------------------------------------------------------------------
# Copyright (C) 2013 The IPython Development Team
#
# Distributed under the terms of the BSD License. The full license is in
# the file COPYING, distributed as part of this software.
#-------------------------------------------------------------------------------
#-------------------------------------------------------------------------------
# Imports
#-------------------------------------------------------------------------------
import os
import shutil
import sys
import tempfile
from contextlib import contextmanager
from subprocess import PIPE
import nose.tools as nt
from IPython.kernel import KernelManager
from IPython.kernel.tests.test_message_spec import execute, flush_channels
from IPython.testing import decorators as dec, tools as tt
from IPython.utils import path, py3compat
#-------------------------------------------------------------------------------
# Tests
#-------------------------------------------------------------------------------
IPYTHONDIR = None
save_env = None
save_get_ipython_dir = None
STARTUP_TIMEOUT = 60
TIMEOUT = 15
def setup():
"""setup temporary IPYTHONDIR for tests"""
global IPYTHONDIR
global save_env
global save_get_ipython_dir
IPYTHONDIR = tempfile.mkdtemp()
save_env = os.environ.copy()
os.environ["IPYTHONDIR"] = IPYTHONDIR
save_get_ipython_dir = path.get_ipython_dir
path.get_ipython_dir = lambda : IPYTHONDIR
def teardown():
path.get_ipython_dir = save_get_ipython_dir
os.environ = save_env
try:
shutil.rmtree(IPYTHONDIR)
except (OSError, IOError):
# no such file
pass
@contextmanager
def new_kernel():
"""start a kernel in a subprocess, and wait for it to be ready
Returns
-------
kernel_manager: connected KernelManager instance
"""
KM = KernelManager()
KM.start_kernel(stdout=PIPE, stderr=PIPE)
KC = KM.client()
KC.start_channels()
# wait for kernel to be ready
KC.shell_channel.execute("import sys")
KC.shell_channel.get_msg(block=True, timeout=STARTUP_TIMEOUT)
flush_channels(KC)
try:
yield KC
finally:
KC.stop_channels()
KM.shutdown_kernel()
def assemble_output(iopub):
"""assemble stdout/err from an execution"""
stdout = ''
stderr = ''
while True:
msg = iopub.get_msg(block=True, timeout=1)
msg_type = msg['msg_type']
content = msg['content']
if msg_type == 'status' and content['execution_state'] == 'idle':
# idle message signals end of output
break
elif msg['msg_type'] == 'stream':
if content['name'] == 'stdout':
stdout = stdout + content['data']
elif content['name'] == 'stderr':
stderr = stderr + content['data']
else:
raise KeyError("bad stream: %r" % content['name'])
else:
# other output, ignored
pass
return stdout, stderr
def _check_mp_mode(kc, expected=False, stream="stdout"):
execute(kc=kc, code="import sys")
flush_channels(kc)
msg_id, content = execute(kc=kc, code="print (sys.%s._check_mp_mode())" % stream)
stdout, stderr = assemble_output(kc.iopub_channel)
nt.assert_equal(eval(stdout.strip()), expected)
# printing tests
def test_simple_print():
"""simple print statement in kernel"""
with new_kernel() as kc:
iopub = kc.iopub_channel
msg_id, content = execute(kc=kc, code="print ('hi')")
stdout, stderr = assemble_output(iopub)
nt.assert_equal(stdout, 'hi\n')
nt.assert_equal(stderr, '')
_check_mp_mode(kc, expected=False)
@dec.knownfailureif(sys.platform == 'win32', "subprocess prints fail on Windows")
def test_subprocess_print():
"""printing from forked mp.Process"""
with new_kernel() as kc:
iopub = kc.iopub_channel
_check_mp_mode(kc, expected=False)
flush_channels(kc)
np = 5
code = '\n'.join([
"from __future__ import print_function",
"import multiprocessing as mp",
"pool = [mp.Process(target=print, args=('hello', i,)) for i in range(%i)]" % np,
"for p in pool: p.start()",
"for p in pool: p.join()"
])
expected = '\n'.join([
"hello %s" % i for i in range(np)
]) + '\n'
msg_id, content = execute(kc=kc, code=code)
stdout, stderr = assemble_output(iopub)
nt.assert_equal(stdout.count("hello"), np, stdout)
for n in range(np):
nt.assert_equal(stdout.count(str(n)), 1, stdout)
nt.assert_equal(stderr, '')
_check_mp_mode(kc, expected=False)
_check_mp_mode(kc, expected=False, stream="stderr")
def test_subprocess_noprint():
"""mp.Process without print doesn't trigger iostream mp_mode"""
with new_kernel() as kc:
iopub = kc.iopub_channel
np = 5
code = '\n'.join([
"import multiprocessing as mp",
"pool = [mp.Process(target=range, args=(i,)) for i in range(%i)]" % np,
"for p in pool: p.start()",
"for p in pool: p.join()"
])
msg_id, content = execute(kc=kc, code=code)
stdout, stderr = assemble_output(iopub)
nt.assert_equal(stdout, '')
nt.assert_equal(stderr, '')
_check_mp_mode(kc, expected=False)
_check_mp_mode(kc, expected=False, stream="stderr")
@dec.knownfailureif(sys.platform == 'win32', "subprocess prints fail on Windows")
def test_subprocess_error():
"""error in mp.Process doesn't crash"""
with new_kernel() as kc:
iopub = kc.iopub_channel
code = '\n'.join([
"import multiprocessing as mp",
"p = mp.Process(target=int, args=('hi',))",
"p.start()",
"p.join()",
])
msg_id, content = execute(kc=kc, code=code)
stdout, stderr = assemble_output(iopub)
nt.assert_equal(stdout, '')
nt.assert_true("ValueError" in stderr, stderr)
_check_mp_mode(kc, expected=False)
_check_mp_mode(kc, expected=False, stream="stderr")
# raw_input tests
def test_raw_input():
"""test [raw_]input"""
with new_kernel() as kc:
iopub = kc.iopub_channel
input_f = "input" if py3compat.PY3 else "raw_input"
theprompt = "prompt> "
code = 'print({input_f}("{theprompt}"))'.format(**locals())
msg_id = kc.execute(code, allow_stdin=True)
msg = kc.get_stdin_msg(block=True, timeout=TIMEOUT)
nt.assert_equal(msg['header']['msg_type'], u'input_request')
content = msg['content']
nt.assert_equal(content['prompt'], theprompt)
text = "some text"
kc.input(text)
reply = kc.get_shell_msg(block=True, timeout=TIMEOUT)
nt.assert_equal(reply['content']['status'], 'ok')
stdout, stderr = assemble_output(iopub)
nt.assert_equal(stdout, text + "\n")
@dec.skipif(py3compat.PY3)
def test_eval_input():
"""test input() on Python 2"""
with new_kernel() as kc:
iopub = kc.iopub_channel
input_f = "input" if py3compat.PY3 else "raw_input"
theprompt = "prompt> "
code = 'print(input("{theprompt}"))'.format(**locals())
msg_id = kc.execute(code, allow_stdin=True)
msg = kc.get_stdin_msg(block=True, timeout=TIMEOUT)
nt.assert_equal(msg['header']['msg_type'], u'input_request')
content = msg['content']
nt.assert_equal(content['prompt'], theprompt)
kc.input("1+1")
reply = kc.get_shell_msg(block=True, timeout=TIMEOUT)
nt.assert_equal(reply['content']['status'], 'ok')
stdout, stderr = assemble_output(iopub)
nt.assert_equal(stdout, "2\n")
def test_help_output():
"""ipython kernel --help-all works"""
tt.help_all_output_test('kernel')
|
