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
|
from test import support
from test.support import import_helper, cpython_only
gdbm = import_helper.import_module("dbm.gnu") #skip if not supported
import unittest
import os
from test.support.os_helper import TESTFN, TESTFN_NONASCII, unlink, FakePath
filename = TESTFN
class TestGdbm(unittest.TestCase):
@staticmethod
def setUpClass():
if support.verbose:
try:
from _gdbm import _GDBM_VERSION as version
except ImportError:
pass
else:
print(f"gdbm version: {version}")
def setUp(self):
self.g = None
def tearDown(self):
if self.g is not None:
self.g.close()
unlink(filename)
@cpython_only
def test_disallow_instantiation(self):
# Ensure that the type disallows instantiation (bpo-43916)
self.g = gdbm.open(filename, 'c')
support.check_disallow_instantiation(self, type(self.g))
def test_key_methods(self):
self.g = gdbm.open(filename, 'c')
self.assertEqual(self.g.keys(), [])
self.g['a'] = 'b'
self.g['12345678910'] = '019237410982340912840198242'
self.g[b'bytes'] = b'data'
key_set = set(self.g.keys())
self.assertEqual(key_set, set([b'a', b'bytes', b'12345678910']))
self.assertIn('a', self.g)
self.assertIn(b'a', self.g)
self.assertEqual(self.g[b'bytes'], b'data')
key = self.g.firstkey()
while key:
self.assertIn(key, key_set)
key_set.remove(key)
key = self.g.nextkey(key)
# get() and setdefault() work as in the dict interface
self.assertEqual(self.g.get(b'a'), b'b')
self.assertIsNone(self.g.get(b'xxx'))
self.assertEqual(self.g.get(b'xxx', b'foo'), b'foo')
with self.assertRaises(KeyError):
self.g['xxx']
self.assertEqual(self.g.setdefault(b'xxx', b'foo'), b'foo')
self.assertEqual(self.g[b'xxx'], b'foo')
def test_error_conditions(self):
# Try to open a non-existent database.
unlink(filename)
self.assertRaises(gdbm.error, gdbm.open, filename, 'r')
# Try to access a closed database.
self.g = gdbm.open(filename, 'c')
self.g.close()
self.assertRaises(gdbm.error, lambda: self.g['a'])
# try pass an invalid open flag
self.assertRaises(gdbm.error, lambda: gdbm.open(filename, 'rx').close())
def test_flags(self):
# Test the flag parameter open() by trying all supported flag modes.
all = set(gdbm.open_flags)
# Test standard flags (presumably "crwn").
modes = all - set('fsu')
for mode in sorted(modes): # put "c" mode first
self.g = gdbm.open(filename, mode)
self.g.close()
# Test additional flags (presumably "fsu").
flags = all - set('crwn')
for mode in modes:
for flag in flags:
self.g = gdbm.open(filename, mode + flag)
self.g.close()
def test_reorganize(self):
self.g = gdbm.open(filename, 'c')
size0 = os.path.getsize(filename)
# bpo-33901: on macOS with gdbm 1.15, an empty database uses 16 MiB
# and adding an entry of 10,000 B has no effect on the file size.
# Add size0 bytes to make sure that the file size changes.
value_size = max(size0, 10000)
self.g['x'] = 'x' * value_size
size1 = os.path.getsize(filename)
self.assertGreater(size1, size0)
del self.g['x']
# 'size' is supposed to be the same even after deleting an entry.
self.assertEqual(os.path.getsize(filename), size1)
self.g.reorganize()
size2 = os.path.getsize(filename)
self.assertLess(size2, size1)
self.assertGreaterEqual(size2, size0)
def test_context_manager(self):
with gdbm.open(filename, 'c') as db:
db["gdbm context manager"] = "context manager"
with gdbm.open(filename, 'r') as db:
self.assertEqual(list(db.keys()), [b"gdbm context manager"])
with self.assertRaises(gdbm.error) as cm:
db.keys()
self.assertEqual(str(cm.exception),
"GDBM object has already been closed")
def test_bytes(self):
with gdbm.open(filename, 'c') as db:
db[b'bytes key \xbd'] = b'bytes value \xbd'
with gdbm.open(filename, 'r') as db:
self.assertEqual(list(db.keys()), [b'bytes key \xbd'])
self.assertTrue(b'bytes key \xbd' in db)
self.assertEqual(db[b'bytes key \xbd'], b'bytes value \xbd')
def test_unicode(self):
with gdbm.open(filename, 'c') as db:
db['Unicode key \U0001f40d'] = 'Unicode value \U0001f40d'
with gdbm.open(filename, 'r') as db:
self.assertEqual(list(db.keys()), ['Unicode key \U0001f40d'.encode()])
self.assertTrue('Unicode key \U0001f40d'.encode() in db)
self.assertTrue('Unicode key \U0001f40d' in db)
self.assertEqual(db['Unicode key \U0001f40d'.encode()],
'Unicode value \U0001f40d'.encode())
self.assertEqual(db['Unicode key \U0001f40d'],
'Unicode value \U0001f40d'.encode())
def test_write_readonly_file(self):
with gdbm.open(filename, 'c') as db:
db[b'bytes key'] = b'bytes value'
with gdbm.open(filename, 'r') as db:
with self.assertRaises(gdbm.error):
del db[b'not exist key']
with self.assertRaises(gdbm.error):
del db[b'bytes key']
with self.assertRaises(gdbm.error):
db[b'not exist key'] = b'not exist value'
@unittest.skipUnless(TESTFN_NONASCII,
'requires OS support of non-ASCII encodings')
def test_nonascii_filename(self):
filename = TESTFN_NONASCII
self.addCleanup(unlink, filename)
with gdbm.open(filename, 'c') as db:
db[b'key'] = b'value'
self.assertTrue(os.path.exists(filename))
with gdbm.open(filename, 'r') as db:
self.assertEqual(list(db.keys()), [b'key'])
self.assertTrue(b'key' in db)
self.assertEqual(db[b'key'], b'value')
def test_nonexisting_file(self):
nonexisting_file = 'nonexisting-file'
with self.assertRaises(gdbm.error) as cm:
gdbm.open(nonexisting_file)
self.assertIn(nonexisting_file, str(cm.exception))
self.assertEqual(cm.exception.filename, nonexisting_file)
def test_open_with_pathlib_path(self):
gdbm.open(FakePath(filename), "c").close()
def test_open_with_bytes_path(self):
gdbm.open(os.fsencode(filename), "c").close()
def test_open_with_pathlib_bytes_path(self):
gdbm.open(FakePath(os.fsencode(filename)), "c").close()
if __name__ == '__main__':
unittest.main()
|
