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#!/usr/bin/env python
#
# Public Domain 2014-2019 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
# test_cursor05.py
# Test cursors at the point where a cursor is first initialized, and when it
# hits an endpoint. Mix that in with column groups.
class test_cursor05(wttest.WiredTigerTestCase):
"""
Test basic operations
"""
nentries = 2
def populate(self, count):
""" Populate the given number of entries. """
cursor = self.session.open_cursor('table:main', None, None)
for i in range(0, count):
cursor[(i, 'key' + str(i))] = ('val' + str(i), i, 'val' + str(i), i)
cursor.close()
def check_iterate_forward(self, cursor, expectcount):
""" Use the cursor to iterate and check for the expected entries. """
i = 0
for ikey, skey, s1, i2, s3, i4 in cursor:
#print 'forward: ' + str([ikey, skey, s1, i2, s3, i4])
self.assertEqual(ikey, i)
self.assertEqual(skey, 'key' + str(i))
self.assertEqual(s1, 'val' + str(i))
self.assertEqual(i2, i)
self.assertEqual(s3, 'val' + str(i))
self.assertEqual(i4, i)
i += 1
self.assertEqual(i, expectcount)
def check_iterate_backward(self, cursor, expectcount):
""" Iterate backwards and check for the expected entries. """
i = expectcount
while cursor.prev() == 0:
i -= 1
(ikey, skey) = cursor.get_keys()
(s1, i2, s3, i4) = cursor.get_values()
#print 'backward: ' + str([ikey, skey, s1, i2, s3, i4])
self.assertEqual(ikey, i)
self.assertEqual(skey, 'key' + str(i))
self.assertEqual(s1, 'val' + str(i))
self.assertEqual(i2, i)
self.assertEqual(s3, 'val' + str(i))
self.assertEqual(i4, i)
self.assertEqual(i, 0)
def check_iterate(self, cursor, expectcount, isforward):
"""
Use the cursor to iterate (forwards or backwards)
and check for the expected entries.
"""
if isforward:
self.check_iterate_forward(cursor, expectcount)
else:
self.check_iterate_backward(cursor, expectcount)
def check_entries(self, testmode, expectcount, isforward):
"""
Use various modes to get the cursor to the 'uninitialized' state,
and verify that is correct by iterating and checking each element.
"""
cursor = self.session.open_cursor('table:main', None, None)
# The cursor is uninitialized. Any of these sequences should
# leave the cursor uninitialized again - ready to iterate.
if testmode == 0:
pass
elif testmode == 1:
cursor.next()
cursor.prev()
elif testmode == 2:
cursor.prev()
cursor.next()
# Verify that by iterating
self.check_iterate(cursor, expectcount, isforward)
# Do something that leaves the cursor in an uninitialized spot
if expectcount > 0:
n = expectcount - 1
s1, i2, s3, i4 = cursor[(n, 'key' + str(n))]
self.assertEqual(s1, 'val' + str(n))
self.assertEqual(i2, n)
self.assertEqual(s3, 'val' + str(n))
self.assertEqual(i4, n)
# Any of these should leave the cursor again positioned at
# an uninitialized spot - ready to iterate
if testmode == 0:
cursor.reset()
elif testmode == 1:
cursor.reset()
cursor.next()
cursor.prev()
elif testmode == 2:
cursor.reset()
cursor.prev()
cursor.next()
# Verify that by iterating
self.check_iterate(cursor, expectcount, isforward)
# After an iteration is complete, the cursor should be in
# the same state as after reset(), or when first created.
if testmode == 0:
pass
elif testmode == 1:
cursor.next()
cursor.prev()
elif testmode == 2:
cursor.prev()
cursor.next()
# Verify that by iterating
self.check_iterate(cursor, expectcount, isforward)
cursor.close()
def common_test(self, nentries, hascolgroups):
cgstr = ',colgroups=(c1,c2)' if hascolgroups else ''
self.session.create('table:main', 'key_format=iS,value_format=SiSi,'
'columns=(ikey,Skey,S1,i2,S3,i4)' + cgstr)
if hascolgroups:
self.session.create("colgroup:main:c1", "columns=(S1,i2)")
self.session.create("colgroup:main:c2", "columns=(S3,i4)")
self.populate(nentries)
self.check_entries(0, nentries, True)
self.check_entries(1, nentries, True)
self.check_entries(2, nentries, True)
self.check_entries(0, nentries, False)
self.check_entries(1, nentries, False)
self.check_entries(2, nentries, False)
def test_without_colgroups(self):
self.common_test(3, False)
def test_with_colgroups(self):
self.common_test(3, True)
def test_empty_without_colgroups(self):
self.common_test(0, False)
def test_empty_with_colgroups(self):
self.common_test(0, True)
if __name__ == '__main__':
wttest.run()
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