| author | Arseniy Alekseyev <aalekseyev@janestreet.com> |
| Thu, 21 Dec 2023 20:30:03 +0000 | |
| changeset 51396 | 3f37d80d3ab4 |
| parent 48875 | 6000f5b25c9b |
| permissions | -rw-r--r-- |
|
36362
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
1 |
import io |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
2 |
import unittest |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
3 |
|
|
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
36362
diff
changeset
|
4 |
from mercurial import util |
|
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
36362
diff
changeset
|
5 |
|
|
36362
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
6 |
|
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
7 |
class CappedReaderTests(unittest.TestCase): |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
8 |
def testreadfull(self): |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
9 |
source = io.BytesIO(b'x' * 100) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
10 |
|
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
11 |
reader = util.cappedreader(source, 10) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
12 |
res = reader.read(10) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
13 |
self.assertEqual(res, b'x' * 10) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
14 |
self.assertEqual(source.tell(), 10) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
15 |
source.seek(0) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
16 |
|
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
17 |
reader = util.cappedreader(source, 15) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
18 |
res = reader.read(16) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
19 |
self.assertEqual(res, b'x' * 15) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
20 |
self.assertEqual(source.tell(), 15) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
21 |
source.seek(0) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
22 |
|
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
23 |
reader = util.cappedreader(source, 100) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
24 |
res = reader.read(100) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
25 |
self.assertEqual(res, b'x' * 100) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
26 |
self.assertEqual(source.tell(), 100) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
27 |
source.seek(0) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
28 |
|
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
29 |
reader = util.cappedreader(source, 50) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
30 |
res = reader.read() |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
31 |
self.assertEqual(res, b'x' * 50) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
32 |
self.assertEqual(source.tell(), 50) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
33 |
source.seek(0) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
34 |
|
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
35 |
def testreadnegative(self): |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
36 |
source = io.BytesIO(b'x' * 100) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
37 |
|
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
38 |
reader = util.cappedreader(source, 20) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
39 |
res = reader.read(-1) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
40 |
self.assertEqual(res, b'x' * 20) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
41 |
self.assertEqual(source.tell(), 20) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
42 |
source.seek(0) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
43 |
|
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
44 |
reader = util.cappedreader(source, 100) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
45 |
res = reader.read(-1) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
46 |
self.assertEqual(res, b'x' * 100) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
47 |
self.assertEqual(source.tell(), 100) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
48 |
source.seek(0) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
49 |
|
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
50 |
def testreadmultiple(self): |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
51 |
source = io.BytesIO(b'x' * 100) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
52 |
|
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
53 |
reader = util.cappedreader(source, 10) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
54 |
for i in range(10): |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
55 |
res = reader.read(1) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
56 |
self.assertEqual(res, b'x') |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
57 |
self.assertEqual(source.tell(), i + 1) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
58 |
|
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
59 |
self.assertEqual(source.tell(), 10) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
60 |
res = reader.read(1) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
61 |
self.assertEqual(res, b'') |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
62 |
self.assertEqual(source.tell(), 10) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
63 |
source.seek(0) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
64 |
|
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
65 |
reader = util.cappedreader(source, 45) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
66 |
for i in range(4): |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
67 |
res = reader.read(10) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
68 |
self.assertEqual(res, b'x' * 10) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
69 |
self.assertEqual(source.tell(), (i + 1) * 10) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
70 |
|
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
71 |
res = reader.read(10) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
72 |
self.assertEqual(res, b'x' * 5) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
73 |
self.assertEqual(source.tell(), 45) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
74 |
|
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
75 |
def readlimitpasteof(self): |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
76 |
source = io.BytesIO(b'x' * 100) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
77 |
|
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
78 |
reader = util.cappedreader(source, 1024) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
79 |
res = reader.read(1000) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
80 |
self.assertEqual(res, b'x' * 100) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
81 |
self.assertEqual(source.tell(), 100) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
82 |
res = reader.read(1000) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
83 |
self.assertEqual(res, b'') |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
84 |
self.assertEqual(source.tell(), 100) |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
85 |
|
|
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
36362
diff
changeset
|
86 |
|
|
36362
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
87 |
if __name__ == '__main__': |
|
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
88 |
import silenttestrunner |
|
43076
2372284d9457
formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
36362
diff
changeset
|
89 |
|
|
36362
01e29e885600
util: add a file object proxy that can read at most N bytes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
diff
changeset
|
90 |
silenttestrunner.main(__name__) |