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#!/usr/bin/env python
#
# Public Domain 2014-2015 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, struct
from suite_subprocess import suite_subprocess
import wiredtiger, wttest
# test_verify.py
# Utilities: wt verify
class test_verify(wttest.WiredTigerTestCase, suite_subprocess):
tablename = 'test_verify.a'
nentries = 1000
def populate(self, tablename):
"""
Insert some simple entries into the table
"""
cursor = self.session.open_cursor('table:' + tablename, None, None)
key = ''
for i in range(0, self.nentries):
key += str(i)
cursor[key] = key + key
cursor.close()
def check_populate(self, tablename):
"""
Verify that items added by populate are still there
"""
cursor = self.session.open_cursor('table:' + tablename, None, None)
wantkey = ''
i = 0
for gotkey, gotval in cursor:
wantkey += str(i)
wantval = wantkey + wantkey
self.assertEqual(gotkey, wantkey)
self.assertEqual(gotval, wantval)
i += 1
self.assertEqual(i, self.nentries)
cursor.close()
def open_and_position(self, tablename, pct):
"""
Open the file for the table, position it at a 4K page
at roughly the given percentage into the file.
As a side effect, the connection is closed.
"""
# we close the connection to guarantee everything is
# flushed and closed from the WT point of view.
if self.conn != None:
self.conn.close()
self.conn = None
filename = tablename + ".wt"
filesize = os.path.getsize(filename)
position = (filesize * pct) / 100
self.pr('damaging file at: ' + str(position))
fp = open(filename, "r+b")
fp.seek(position)
return fp
def test_verify_process_empty(self):
"""
Test verify in a 'wt' process, using an empty table
"""
params = 'key_format=S,value_format=S'
self.session.create('table:' + self.tablename, params)
# Run verify with an empty table
self.runWt(["verify", "table:" + self.tablename])
def test_verify_process(self):
"""
Test verify in a 'wt' process, using a populated table.
"""
params = 'key_format=S,value_format=S'
self.session.create('table:' + self.tablename, params)
self.populate(self.tablename)
self.runWt(["verify", "table:" + self.tablename])
def test_verify_api_empty(self):
"""
Test verify via API, using an empty table
"""
params = 'key_format=S,value_format=S'
self.session.create('table:' + self.tablename, params)
self.session.verify('table:' + self.tablename, None)
def test_verify_api(self):
"""
Test verify via API, using a populated table.
"""
params = 'key_format=S,value_format=S'
self.session.create('table:' + self.tablename, params)
self.populate(self.tablename)
self.session.verify('table:' + self.tablename, None)
self.check_populate(self.tablename)
def test_verify_api_75pct_null(self):
"""
Test verify via API, on a damaged table.
This is our only 'negative' test for verify using the API,
it's uncertain that we can have reliable tests for this.
"""
params = 'key_format=S,value_format=S'
self.session.create('table:' + self.tablename, params)
self.populate(self.tablename)
with self.open_and_position(self.tablename, 75) as f:
for i in range(0, 4096):
f.write(struct.pack('B', 0))
# open_and_position closed the session/connection, reopen them now.
self.conn = self.setUpConnectionOpen(".")
self.session = self.setUpSessionOpen(self.conn)
self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
lambda: self.session.verify('table:' + self.tablename, None),
"/WT_SESSION.verify/")
def test_verify_process_75pct_null(self):
"""
Test verify in a 'wt' process on a table that is purposely damaged,
with nulls at a position about 75% through.
"""
params = 'key_format=S,value_format=S'
self.session.create('table:' + self.tablename, params)
self.populate(self.tablename)
with self.open_and_position(self.tablename, 75) as f:
for i in range(0, 4096):
f.write(struct.pack('B', 0))
self.runWt(["verify", "table:" + self.tablename], errfilename="verifyerr.out")
self.check_non_empty_file("verifyerr.out")
def test_verify_process_25pct_junk(self):
"""
Test verify in a 'wt' process on a table that is purposely damaged,
with junk at a position about 25% through.
"""
params = 'key_format=S,value_format=S'
self.session.create('table:' + self.tablename, params)
self.populate(self.tablename)
with self.open_and_position(self.tablename, 25) as f:
for i in range(0, 100):
f.write('\x01\xff\x80')
self.runWt(["verify", "table:" + self.tablename], errfilename="verifyerr.out")
self.check_non_empty_file("verifyerr.out")
def test_verify_process_truncated(self):
"""
Test verify in a 'wt' process on a table that is purposely damaged,
truncated about 75% through.
"""
params = 'key_format=S,value_format=S'
self.session.create('table:' + self.tablename, params)
self.populate(self.tablename)
with self.open_and_position(self.tablename, 75) as f:
f.truncate(0)
self.runWt(["verify", "table:" + self.tablename], errfilename="verifyerr.out")
self.check_non_empty_file("verifyerr.out")
def test_verify_process_zero_length(self):
"""
Test verify in a 'wt' process on a zero-length table.
"""
params = 'key_format=S,value_format=S'
self.session.create('table:' + self.tablename, params)
self.populate(self.tablename)
with self.open_and_position(self.tablename, 0) as f:
f.truncate(0)
self.runWt(["verify", "table:" + self.tablename], errfilename="verifyerr.out")
self.check_non_empty_file("verifyerr.out")
if __name__ == '__main__':
wttest.run()
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