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
|
#!/usr/bin/env python
#
# Copyright (c) 2008-2012 WiredTiger, Inc.
#
# This is free and unencumbered software released into the public domain.
#
# Anyone is free to copy, modify, publish, use, compile, sell, or
# distribute this software, either in source code form or as a compiled
# binary, for any purpose, commercial or non-commercial, and by any
# means.
#
# In jurisdictions that recognize copyright laws, the author or authors
# of this software dedicate any and all copyright interest in the
# software to the public domain. We make this dedication for the benefit
# of the public at large and to the detriment of our heirs and
# successors. We intend this dedication to be an overt act of
# relinquishment in perpetuity of all present and future rights to this
# software under copyright law.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.
#
# test_cursor01.py
# Cursor operations
#
import unittest
import wiredtiger
from wiredtiger import WiredTigerError
import wttest
class test_cursor01(wttest.WiredTigerTestCase):
"""
Test basic operations
"""
table_name1 = 'test_cursor01'
nentries = 10
scenarios = [
('row', dict(tablekind='row')),
('col', dict(tablekind='col')),
('fix', dict(tablekind='fix'))
]
def config_string(self):
"""
Return any additional configuration.
This method may be overridden.
"""
return ''
def session_create(self, name, args):
"""
session.create, but report errors more completely
"""
try:
self.session.create(name, args)
except:
print('**** ERROR in session.create("' + name + '","' + args + '") ***** ')
raise
def create_session_and_cursor(self):
tablearg = "table:" + self.table_name1
if self.tablekind == 'row':
keyformat = 'key_format=S'
else:
keyformat = 'key_format=r' # record format
if self.tablekind == 'fix':
valformat = 'value_format=8t'
else:
valformat = 'value_format=S'
create_args = keyformat + ',' + valformat + self.config_string()
print('creating session: ' + create_args)
self.session_create(tablearg, create_args)
self.pr('creating cursor')
return self.session.open_cursor(tablearg, None, None)
def genkey(self, i):
if self.tablekind == 'row':
return 'key' + str(i)
else:
return long(i+1)
def genvalue(self, i):
if self.tablekind == 'fix':
return int(i & 0xff)
else:
return 'value' + str(i)
def assertCursorHasNoKeyValue(self, cursor):
print('Expect to see messages: \'requires key/value to be set\'')
self.assertRaises(WiredTigerError, cursor.get_key)
self.assertRaises(WiredTigerError, cursor.get_value)
def test_forward_iter(self):
"""
Create entries, and read back in a cursor: key=string, value=string
"""
cursor = self.create_session_and_cursor()
self.assertCursorHasNoKeyValue(cursor)
for i in range(0, self.nentries):
cursor.set_key(self.genkey(i))
cursor.set_value(self.genvalue(i))
cursor.insert()
# Don't use the builtin 'for ... in cursor',
# iterate using the basic API.
# 1. Start with the first k/v pair.
cursor.reset()
i = 0
while True:
nextret = cursor.next()
if nextret != 0:
break
key = cursor.get_key()
value = cursor.get_value()
#print('want: ' + str(self.genkey(i)) + ' got: ' + str(key))
self.assertEqual(key, self.genkey(i))
self.assertEqual(value, self.genvalue(i))
i += 1
self.assertEqual(nextret, wiredtiger.WT_NOTFOUND)
self.assertEqual(i, self.nentries)
# After an error, we can no longer access the key or value
self.assertCursorHasNoKeyValue(cursor)
# 2. Setting reset() should place us just before first pair.
cursor.reset()
self.assertCursorHasNoKeyValue(cursor)
nextret = cursor.next()
i = 0
while nextret == 0:
key = cursor.get_key()
value = cursor.get_value()
self.assertEqual(key, self.genkey(i))
self.assertEqual(value, self.genvalue(i))
i += 1
nextret = cursor.next()
self.assertEqual(nextret, wiredtiger.WT_NOTFOUND)
self.assertEqual(i, self.nentries)
cursor.close()
def test_backward_iter(self):
"""
Create entries, and read back in a cursor: key=string, value=string
"""
cursor = self.create_session_and_cursor()
self.assertCursorHasNoKeyValue(cursor)
for i in range(0, self.nentries):
cursor.set_key(self.genkey(i))
cursor.set_value(self.genvalue(i))
cursor.insert()
# Don't use the builtin 'for ... in cursor',
# iterate using the basic API.
# 1. Start with the last k/v pair.
cursor.reset()
i = self.nentries - 1
while True:
prevret = cursor.prev()
if prevret != 0:
break
key = cursor.get_key()
value = cursor.get_value()
self.assertEqual(key, self.genkey(i))
self.assertEqual(value, self.genvalue(i))
i -= 1
self.assertEqual(prevret, wiredtiger.WT_NOTFOUND)
self.assertEqual(i, -1)
# After an error, we can no longer access the key or value
self.assertCursorHasNoKeyValue(cursor)
# 2. Setting reset() should place us just after last pair.
cursor.reset()
self.assertCursorHasNoKeyValue(cursor)
prevret = cursor.prev()
i = self.nentries - 1
while prevret == 0:
key = cursor.get_key()
value = cursor.get_value()
self.assertEqual(key, self.genkey(i))
self.assertEqual(value, self.genvalue(i))
i -= 1
prevret = cursor.prev()
self.assertEqual(prevret, wiredtiger.WT_NOTFOUND)
self.assertEqual(i, -1)
cursor.close()
if __name__ == '__main__':
wttest.run()
|
