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#!/usr/bin/env python
#
# Public Domain 2014-2016 MongoDB, Inc.
# Public Domain 2008-2014 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
from wtscenario import make_scenarios
# test_cursor01.py
# Cursor operations
# Basic smoke-test of file and table cursors: tests get/set key, insert
# and forward/backward iteration, and mostly because we don't test them
# anywhere else, cursor duplication and equality.
class test_cursor01(wttest.WiredTigerTestCase):
"""
Test basic operations
"""
table_name1 = 'test_cursor01'
nentries = 10
scenarios = make_scenarios([
('file-col', dict(tablekind='col',uri='file')),
('file-fix', dict(tablekind='fix',uri='file')),
('file-row', dict(tablekind='row',uri='file')),
('lsm-row', dict(tablekind='row',uri='lsm')),
('table-col', dict(tablekind='col',uri='table')),
('table-fix', dict(tablekind='fix',uri='table')),
('table-row', dict(tablekind='row',uri='table'))
])
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):
keymsg = '/requires key be set/'
valuemsg = '/requires value be set/'
self.assertRaisesWithMessage(
wiredtiger.WiredTigerError, cursor.get_key, keymsg)
self.assertRaisesWithMessage(
wiredtiger.WiredTigerError, cursor.get_value, valuemsg)
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
# Create and populate the object, returning an open cursor.
def create_session_and_cursor(self):
tablearg = self.uri + ':' + 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.pr('creating session: ' + create_args)
self.session_create(tablearg, create_args)
self.pr('creating cursor')
cursor = self.session.open_cursor(tablearg, None, None)
self.assertCursorHasNoKeyValue(cursor)
for i in range(0, self.nentries):
cursor[self.genkey(i)] = self.genvalue(i)
return cursor
# Forward iteration.
def forward_iter(self, cursor):
cursor.reset()
self.assertCursorHasNoKeyValue(cursor)
i = 0
while True:
nextret = cursor.next()
if nextret != 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(i, self.nentries)
self.assertEqual(nextret, wiredtiger.WT_NOTFOUND)
self.assertCursorHasNoKeyValue(cursor)
return cursor
# Forward iteration with cursor duplication.
def forward_iter_with_dup(self, cursor):
cursor.reset()
self.assertCursorHasNoKeyValue(cursor)
i = 0
while True:
nextret = cursor.next()
if nextret != 0:
break
key = cursor.get_key()
value = cursor.get_value()
self.assertEqual(key, self.genkey(i))
self.assertEqual(value, self.genvalue(i))
dupc = self.session.open_cursor(None, cursor, None)
self.assertEquals(cursor.compare(dupc), 0)
key = dupc.get_key()
value = dupc.get_value()
self.assertEqual(key, self.genkey(i))
self.assertEqual(value, self.genvalue(i))
i += 1
cursor.close()
cursor = dupc
self.assertEqual(i, self.nentries)
self.assertEqual(nextret, wiredtiger.WT_NOTFOUND)
self.assertCursorHasNoKeyValue(cursor)
return cursor
# Forward iteration through the object.
# Don't use the builtin 'for ... in cursor', iterate using the basic API.
def test_forward_iter(self):
cursor = self.create_session_and_cursor()
cursor = self.forward_iter(cursor)
cursor = self.forward_iter_with_dup(cursor)
cursor.close()
# Backward iteration.
def backward_iter(self, cursor):
cursor.reset()
self.assertCursorHasNoKeyValue(cursor)
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(i, -1)
self.assertEqual(prevret, wiredtiger.WT_NOTFOUND)
self.assertCursorHasNoKeyValue(cursor)
return cursor
# Backward iteration with cursor duplication.
def backward_iter_with_dup(self, cursor):
cursor.reset()
self.assertCursorHasNoKeyValue(cursor)
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
dupc = self.session.open_cursor(None, cursor, None)
self.assertEquals(cursor.compare(dupc), 0)
cursor.close()
cursor = dupc
self.assertEqual(i, -1)
self.assertEqual(prevret, wiredtiger.WT_NOTFOUND)
self.assertCursorHasNoKeyValue(cursor)
return cursor
# Backward iteration through the object.
# Don't use the builtin 'for ... in cursor', iterate using the basic API.
def test_backward_iter(self):
cursor = self.create_session_and_cursor()
cursor = self.backward_iter(cursor)
cursor = self.backward_iter_with_dup(cursor)
cursor.close()
if __name__ == '__main__':
wttest.run()
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