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
|
import os
import pytest
from buildstream.utils import save_file_atomic
def test_save_new_file(tmpdir):
filename = os.path.join(str(tmpdir), 'savefile-success.test')
with save_file_atomic(filename, 'w') as f:
f.write('foo\n')
assert os.listdir(str(tmpdir)) == ['savefile-success.test']
with open(filename) as f:
assert f.read() == 'foo\n'
def test_save_over_existing_file(tmpdir):
filename = os.path.join(str(tmpdir), 'savefile-overwrite.test')
with open(filename, 'w') as f:
f.write('existing contents\n')
with save_file_atomic(filename, 'w') as f:
f.write('overwritten contents\n')
assert os.listdir(str(tmpdir)) == ['savefile-overwrite.test']
with open(filename) as f:
assert f.read() == 'overwritten contents\n'
def test_exception_new_file(tmpdir):
filename = os.path.join(str(tmpdir), 'savefile-exception.test')
with pytest.raises(RuntimeError):
with save_file_atomic(filename, 'w') as f:
f.write('Some junk\n')
raise RuntimeError("Something goes wrong")
assert os.listdir(str(tmpdir)) == []
def test_exception_existing_file(tmpdir):
filename = os.path.join(str(tmpdir), 'savefile-existing.test')
with open(filename, 'w') as f:
f.write('existing contents\n')
with pytest.raises(RuntimeError):
with save_file_atomic(filename, 'w') as f:
f.write('Some junk\n')
raise RuntimeError("Something goes wrong")
assert os.listdir(str(tmpdir)) == ['savefile-existing.test']
with open(filename) as f:
assert f.read() == 'existing contents\n'
def test_attributes(tmpdir):
filename = os.path.join(str(tmpdir), 'savefile-attributes.test')
with save_file_atomic(filename, 'w') as f:
assert f.real_filename == filename
assert f.name != filename
|
