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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),
+ "/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()