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
|
import sys
import unittest
import io
import atexit
from test import support
### helpers
def h1():
print("h1")
def h2():
print("h2")
def h3():
print("h3")
def h4(*args, **kwargs):
print("h4", args, kwargs)
def raise1():
raise TypeError
def raise2():
raise SystemError
def exit():
raise SystemExit
class GeneralTest(unittest.TestCase):
def setUp(self):
self.save_stdout = sys.stdout
self.save_stderr = sys.stderr
self.stream = io.StringIO()
sys.stdout = sys.stderr = self.stream
atexit._clear()
def tearDown(self):
sys.stdout = self.save_stdout
sys.stderr = self.save_stderr
atexit._clear()
def test_args(self):
# be sure args are handled properly
atexit.register(h1)
atexit.register(h4)
atexit.register(h4, 4, kw="abc")
atexit._run_exitfuncs()
self.assertEqual(self.stream.getvalue(),
"h4 (4,) {'kw': 'abc'}\nh4 () {}\nh1\n")
def test_badargs(self):
atexit.register(lambda: 1, 0, 0, (x for x in (1,2)), 0, 0)
self.assertRaises(TypeError, atexit._run_exitfuncs)
def test_order(self):
# be sure handlers are executed in reverse order
atexit.register(h1)
atexit.register(h2)
atexit.register(h3)
atexit._run_exitfuncs()
self.assertEqual(self.stream.getvalue(), "h3\nh2\nh1\n")
def test_raise(self):
# be sure raises are handled properly
atexit.register(raise1)
atexit.register(raise2)
self.assertRaises(TypeError, atexit._run_exitfuncs)
def test_raise_unnormalized(self):
# Issue #10756: Make sure that an unnormalized exception is
# handled properly
atexit.register(lambda: 1 / 0)
self.assertRaises(ZeroDivisionError, atexit._run_exitfuncs)
self.assertIn("ZeroDivisionError", self.stream.getvalue())
def test_exit(self):
# be sure a SystemExit is handled properly
atexit.register(exit)
self.assertRaises(SystemExit, atexit._run_exitfuncs)
self.assertEqual(self.stream.getvalue(), '')
def test_print_tracebacks(self):
# Issue #18776: the tracebacks should be printed when errors occur.
def f():
1/0 # one
def g():
1/0 # two
def h():
1/0 # three
atexit.register(f)
atexit.register(g)
atexit.register(h)
self.assertRaises(ZeroDivisionError, atexit._run_exitfuncs)
stderr = self.stream.getvalue()
self.assertEqual(stderr.count("ZeroDivisionError"), 3)
self.assertIn("# one", stderr)
self.assertIn("# two", stderr)
self.assertIn("# three", stderr)
def test_stress(self):
a = [0]
def inc():
a[0] += 1
for i in range(128):
atexit.register(inc)
atexit._run_exitfuncs()
self.assertEqual(a[0], 128)
def test_clear(self):
a = [0]
def inc():
a[0] += 1
atexit.register(inc)
atexit._clear()
atexit._run_exitfuncs()
self.assertEqual(a[0], 0)
def test_unregister(self):
a = [0]
def inc():
a[0] += 1
def dec():
a[0] -= 1
for i in range(4):
atexit.register(inc)
atexit.register(dec)
atexit.unregister(inc)
atexit._run_exitfuncs()
self.assertEqual(a[0], -1)
def test_bound_methods(self):
l = []
atexit.register(l.append, 5)
atexit._run_exitfuncs()
self.assertEqual(l, [5])
atexit.unregister(l.append)
atexit._run_exitfuncs()
self.assertEqual(l, [5])
@support.cpython_only
class SubinterpreterTest(unittest.TestCase):
def test_callbacks_leak(self):
# This test shows a leak in refleak mode if atexit doesn't
# take care to free callbacks in its per-subinterpreter module
# state.
n = atexit._ncallbacks()
code = r"""if 1:
import atexit
def f():
pass
atexit.register(f)
del atexit
"""
ret = support.run_in_subinterp(code)
self.assertEqual(ret, 0)
self.assertEqual(atexit._ncallbacks(), n)
def test_callbacks_leak_refcycle(self):
# Similar to the above, but with a refcycle through the atexit
# module.
n = atexit._ncallbacks()
code = r"""if 1:
import atexit
def f():
pass
atexit.register(f)
atexit.__atexit = atexit
"""
ret = support.run_in_subinterp(code)
self.assertEqual(ret, 0)
self.assertEqual(atexit._ncallbacks(), n)
if __name__ == "__main__":
unittest.main()
|
