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#!/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.
import wiredtiger, wttest
# test_base04.py
# Cursor operations
class test_cursor04(wttest.WiredTigerTestCase):
"""
Test cursor search and search_near
"""
table_name1 = 'test_cursor04'
nentries = 20
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()
self.pr('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).zfill(5) # return key00001, key00002, etc.
else:
return long(i+1)
def genvalue(self, i):
if self.tablekind == 'fix':
return int(i & 0xff)
else:
return 'value' + str(i)
def expect_either(self, cursor, lt, gt):
origkey = cursor.get_key()
near_ret = cursor.search_near()
self.assertEqual(near_ret[0], 0)
direction = near_ret[1]
# Deletions for 'fix' clear the value, they
# do not remove the key, so we expect '0' direction
# (that is key found) for fix.
if self.tablekind != 'fix':
self.assertTrue(direction == 1 or direction == -1)
else:
self.assertEqual(direction, 0)
if direction == 1:
self.assertEqual(cursor.get_key(), self.genkey(gt))
self.assertEqual(cursor.get_value(), self.genvalue(gt))
elif direction == -1:
self.assertEqual(cursor.get_key(), self.genkey(lt))
self.assertEqual(cursor.get_value(), self.genvalue(lt))
else:
self.assertEqual(direction, 0)
self.assertEqual(cursor.get_key(), origkey)
self.assertEqual(cursor.get_value(), 0)
def test_searches(self):
"""
Create entries, and read back in a cursor: key=string, value=string
"""
cursor = self.create_session_and_cursor()
# Some tests below expect keys between 0-10 to be available
self.assertTrue(self.nentries > 10)
# 0. Populate the key space
for i in range(0, self.nentries):
cursor.set_key(self.genkey(i))
cursor.set_value(self.genvalue(i))
cursor.insert()
# 1. Calling search for a value that exists
cursor.set_key(self.genkey(5))
self.assertEqual(cursor.search(), 0)
self.assertEqual(cursor.get_key(), self.genkey(5))
self.assertEqual(cursor.get_value(), self.genvalue(5))
# 2. Calling search for a value that does not exist
cursor.set_key(self.genkey(self.nentries))
self.assertEqual(cursor.search(), wiredtiger.WT_NOTFOUND)
# The key/value should be cleared on NOTFOUND
keymsg = 'cursor.get_key: requires key be set: Invalid argument\n'
valuemsg = 'cursor.get_value: requires value be set: Invalid argument\n'
self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
cursor.get_key, keymsg)
self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
cursor.get_value, valuemsg)
# 2. Calling search_near for a value beyond the end
cursor.set_key(self.genkey(self.nentries))
near_ret = cursor.search_near()
self.assertEqual(near_ret[0], 0)
self.assertEqual(near_ret[1], -1)
self.assertEqual(cursor.get_key(), self.genkey(self.nentries-1))
self.assertEqual(cursor.get_value(), self.genvalue(self.nentries-1))
# 2.a calling search_near for an existing value
cursor.set_key(self.genkey(7))
near_ret = cursor.search_near()
self.assertEqual(near_ret[0], 0)
self.assertEqual(near_ret[1], 0)
self.assertEqual(cursor.get_key(), self.genkey(7))
self.assertEqual(cursor.get_value(), self.genvalue(7))
# 3. Delete some keys
# Deletions for 'fix' clear the value, they
# do not remove the key
cursor.set_key(self.genkey(0))
cursor.remove()
cursor.set_key(self.genkey(5))
cursor.remove()
cursor.set_key(self.genkey(9))
cursor.remove()
cursor.set_key(self.genkey(10))
cursor.remove()
#cursor.reset()
#for key, value in cursor:
# print('key: ' + str(key))
# print('value: ' + str(value))
cursor.set_key(self.genkey(0))
near_ret = cursor.search_near()
self.assertEqual(near_ret[0], 0)
if self.tablekind != 'fix':
self.assertEqual(near_ret[1], 1)
self.assertEqual(cursor.get_key(), self.genkey(1))
self.assertEqual(cursor.get_value(), self.genvalue(1))
else:
self.assertEqual(near_ret[1], 0)
self.assertEqual(cursor.get_key(), self.genkey(0))
self.assertEqual(cursor.get_value(), 0)
cursor.set_key(self.genkey(5))
self.expect_either(cursor, 4, 6)
cursor.set_key(self.genkey(9))
self.expect_either(cursor, 8, 11)
cursor.set_key(self.genkey(10))
self.expect_either(cursor, 8, 11)
cursor.close()
if __name__ == '__main__':
wttest.run()
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