100 lines
3.7 KiB
Python
100 lines
3.7 KiB
Python
#!/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 os
|
|
import wiredtiger, wttest
|
|
from helper import key_populate
|
|
from wtscenario import check_scenarios
|
|
|
|
# test_empty.py
|
|
# Test that empty objects don't write anything other than a single sector.
|
|
class test_empty(wttest.WiredTigerTestCase):
|
|
name = 'test_empty'
|
|
|
|
scenarios = check_scenarios([
|
|
('file-r', dict(type='file:', fmt='r')),
|
|
('file-S', dict(type='file:', fmt='S')),
|
|
('table-r', dict(type='table:', fmt='r')),
|
|
('table-S', dict(type='table:', fmt='S'))
|
|
])
|
|
|
|
# Creating an object and then closing it shouldn't write any blocks.
|
|
def test_empty_create(self):
|
|
uri = self.type + self.name
|
|
self.session.create(uri, 'key_format=' + self.fmt)
|
|
self.session.close()
|
|
name = self.name
|
|
if self.type == "table:":
|
|
name = name + '.wt'
|
|
self.assertEquals(os.stat(name).st_size, 4*1024)
|
|
|
|
# Open a new sesssion, add a few rows to an object and then remove them,
|
|
# then close the object. We open/close the object so it's flushed from
|
|
# the underlying cache each time.
|
|
def empty(self):
|
|
uri = self.type + self.name
|
|
self.session = self.conn.open_session()
|
|
self.session.create(uri, 'key_format=' + self.fmt)
|
|
|
|
# Add a few records to the object and remove them.
|
|
cursor = self.session.open_cursor(uri, None, None)
|
|
for i in range(1,5):
|
|
key = key_populate(cursor, i)
|
|
cursor[key] = "XXX"
|
|
del cursor[key]
|
|
|
|
# Perform a checkpoint (we shouldn't write any underlying pages because
|
|
# of a checkpoint, either).
|
|
self.session.checkpoint("name=ckpt")
|
|
|
|
# Open and close a checkpoint cursor.
|
|
cursor = self.session.open_cursor(uri, None, "checkpoint=ckpt")
|
|
cursor.close()
|
|
|
|
self.session.close()
|
|
|
|
# The file should not have grown.
|
|
name = self.name
|
|
if self.type == "table:":
|
|
name = name + '.wt'
|
|
self.assertEquals(os.stat(name).st_size, 4*1024)
|
|
|
|
# Creating an object, inserting and removing records (that is, building an
|
|
# empty, dirty tree), shouldn't write any blocks. This doesn't work for
|
|
# column-store objects, though, because deleting an object modifies the name
|
|
# space, which requires a write.
|
|
def test_empty(self):
|
|
if self.fmt == 'r':
|
|
return
|
|
|
|
for i in range(1,5):
|
|
self.empty()
|
|
|
|
if __name__ == '__main__':
|
|
wttest.run()
|