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
|
"""Test script for the dbm.open function based on testdumbdbm.py"""
import unittest
import dbm
import os
from test.support import import_helper
from test.support import os_helper
try:
from dbm import ndbm
except ImportError:
ndbm = None
dirname = os_helper.TESTFN
_fname = os.path.join(dirname, os_helper.TESTFN)
#
# Iterates over every database module supported by dbm currently available.
#
def dbm_iterator():
for name in dbm._names:
try:
mod = __import__(name, fromlist=['open'])
except ImportError:
continue
dbm._modules[name] = mod
yield mod
#
# Clean up all scratch databases we might have created during testing
#
def cleaunup_test_dir():
os_helper.rmtree(dirname)
def setup_test_dir():
cleaunup_test_dir()
os.mkdir(dirname)
class AnyDBMTestCase:
_dict = {'a': b'Python:',
'b': b'Programming',
'c': b'the',
'd': b'way',
'f': b'Guido',
'g': b'intended',
}
def init_db(self):
f = dbm.open(_fname, 'n')
for k in self._dict:
f[k.encode("ascii")] = self._dict[k]
f.close()
def keys_helper(self, f):
keys = sorted(k.decode("ascii") for k in f.keys())
dkeys = sorted(self._dict.keys())
self.assertEqual(keys, dkeys)
return keys
def test_error(self):
self.assertTrue(issubclass(self.module.error, OSError))
def test_anydbm_not_existing(self):
self.assertRaises(dbm.error, dbm.open, _fname)
def test_anydbm_creation(self):
f = dbm.open(_fname, 'c')
self.assertEqual(list(f.keys()), [])
for key in self._dict:
f[key.encode("ascii")] = self._dict[key]
self.read_helper(f)
f.close()
def test_anydbm_creation_n_file_exists_with_invalid_contents(self):
# create an empty file
os_helper.create_empty_file(_fname)
with dbm.open(_fname, 'n') as f:
self.assertEqual(len(f), 0)
def test_anydbm_modification(self):
self.init_db()
f = dbm.open(_fname, 'c')
self._dict['g'] = f[b'g'] = b"indented"
self.read_helper(f)
# setdefault() works as in the dict interface
self.assertEqual(f.setdefault(b'xxx', b'foo'), b'foo')
self.assertEqual(f[b'xxx'], b'foo')
f.close()
def test_anydbm_read(self):
self.init_db()
f = dbm.open(_fname, 'r')
self.read_helper(f)
# get() works as in the dict interface
self.assertEqual(f.get(b'a'), self._dict['a'])
self.assertEqual(f.get(b'xxx', b'foo'), b'foo')
self.assertIsNone(f.get(b'xxx'))
with self.assertRaises(KeyError):
f[b'xxx']
f.close()
def test_anydbm_keys(self):
self.init_db()
f = dbm.open(_fname, 'r')
keys = self.keys_helper(f)
f.close()
def test_empty_value(self):
if getattr(dbm._defaultmod, 'library', None) == 'Berkeley DB':
self.skipTest("Berkeley DB doesn't distinguish the empty value "
"from the absent one")
f = dbm.open(_fname, 'c')
self.assertEqual(f.keys(), [])
f[b'empty'] = b''
self.assertEqual(f.keys(), [b'empty'])
self.assertIn(b'empty', f)
self.assertEqual(f[b'empty'], b'')
self.assertEqual(f.get(b'empty'), b'')
self.assertEqual(f.setdefault(b'empty'), b'')
f.close()
def test_anydbm_access(self):
self.init_db()
f = dbm.open(_fname, 'r')
key = "a".encode("ascii")
self.assertIn(key, f)
assert(f[key] == b"Python:")
f.close()
def test_open_with_bytes(self):
dbm.open(os.fsencode(_fname), "c").close()
def test_open_with_pathlib_path(self):
dbm.open(os_helper.FakePath(_fname), "c").close()
def test_open_with_pathlib_path_bytes(self):
dbm.open(os_helper.FakePath(os.fsencode(_fname)), "c").close()
def read_helper(self, f):
keys = self.keys_helper(f)
for key in self._dict:
self.assertEqual(self._dict[key], f[key.encode("ascii")])
def test_keys(self):
with dbm.open(_fname, 'c') as d:
self.assertEqual(d.keys(), [])
a = [(b'a', b'b'), (b'12345678910', b'019237410982340912840198242')]
for k, v in a:
d[k] = v
self.assertEqual(sorted(d.keys()), sorted(k for (k, v) in a))
for k, v in a:
self.assertIn(k, d)
self.assertEqual(d[k], v)
self.assertNotIn(b'xxx', d)
self.assertRaises(KeyError, lambda: d[b'xxx'])
def test_clear(self):
with dbm.open(_fname, 'c') as d:
self.assertEqual(d.keys(), [])
a = [(b'a', b'b'), (b'12345678910', b'019237410982340912840198242')]
for k, v in a:
d[k] = v
for k, _ in a:
self.assertIn(k, d)
self.assertEqual(len(d), len(a))
d.clear()
self.assertEqual(len(d), 0)
for k, _ in a:
self.assertNotIn(k, d)
def setUp(self):
self.addCleanup(setattr, dbm, '_defaultmod', dbm._defaultmod)
dbm._defaultmod = self.module
self.addCleanup(cleaunup_test_dir)
setup_test_dir()
class WhichDBTestCase(unittest.TestCase):
def test_whichdb(self):
self.addCleanup(setattr, dbm, '_defaultmod', dbm._defaultmod)
_bytes_fname = os.fsencode(_fname)
fnames = [_fname, os_helper.FakePath(_fname),
_bytes_fname, os_helper.FakePath(_bytes_fname)]
for module in dbm_iterator():
# Check whether whichdb correctly guesses module name
# for databases opened with "module" module.
name = module.__name__
setup_test_dir()
dbm._defaultmod = module
# Try with empty files first
with module.open(_fname, 'c'): pass
for path in fnames:
self.assertEqual(name, self.dbm.whichdb(path))
# Now add a key
with module.open(_fname, 'w') as f:
f[b"1"] = b"1"
# and test that we can find it
self.assertIn(b"1", f)
# and read it
self.assertEqual(f[b"1"], b"1")
for path in fnames:
self.assertEqual(name, self.dbm.whichdb(path))
@unittest.skipUnless(ndbm, reason='Test requires ndbm')
def test_whichdb_ndbm(self):
# Issue 17198: check that ndbm which is referenced in whichdb is defined
with open(_fname + '.db', 'wb'): pass
_bytes_fname = os.fsencode(_fname)
fnames = [_fname, os_helper.FakePath(_fname),
_bytes_fname, os_helper.FakePath(_bytes_fname)]
for path in fnames:
self.assertIsNone(self.dbm.whichdb(path))
def setUp(self):
self.addCleanup(cleaunup_test_dir)
setup_test_dir()
self.dbm = import_helper.import_fresh_module('dbm')
for mod in dbm_iterator():
assert mod.__name__.startswith('dbm.')
suffix = mod.__name__[4:]
testname = f'TestCase_{suffix}'
globals()[testname] = type(testname,
(AnyDBMTestCase, unittest.TestCase),
{'module': mod})
if __name__ == "__main__":
unittest.main()
|
