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+#!/usr/bin/env python
+#
+# Public Domain 2014-present 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 wttest
+from wiredtiger import WT_NOTFOUND
+from wtscenario import make_scenarios
+
+def timestamp_str(t):
+ return '%x' % t
+
+# test_prepare14.py
+# Test that the transaction visibility of an on-disk update
+# that has both the start and the stop time points from the
+# same uncommitted prepared transaction.
+class test_prepare14(wttest.WiredTigerTestCase):
+ session_config = 'isolation=snapshot'
+
+ in_memory_values = [
+ ('no_inmem', dict(in_memory=False)),
+ ('inmem', dict(in_memory=True))
+ ]
+
+ key_format_values = [
+ ('column', dict(key_format='r')),
+ ('integer_row', dict(key_format='i')),
+ ]
+
+ scenarios = make_scenarios(in_memory_values, key_format_values)
+
+ def conn_config(self):
+ config = 'cache_size=50MB'
+ if self.in_memory:
+ config += ',in_memory=true'
+ else:
+ config += ',in_memory=false'
+ return config
+
+ def test_prepare14(self):
+ # Prepare transactions for column store table is not yet supported.
+ if self.key_format == 'r':
+ self.skipTest('Prepare transactions for column store table is not yet supported')
+
+ # Create a table without logging.
+ uri = "table:prepare14"
+ create_config = 'allocation_size=512,key_format=S,value_format=S'
+ self.session.create(uri, create_config)
+
+ # Pin oldest and stable timestamps to 10.
+ self.conn.set_timestamp('oldest_timestamp=' + timestamp_str(10) +
+ ',stable_timestamp=' + timestamp_str(10))
+
+ value = 'a'
+
+ # Perform several updates and removes.
+ s = self.conn.open_session()
+ cursor = s.open_cursor(uri)
+ s.begin_transaction()
+ cursor[str(0)] = value
+ cursor.set_key(str(0))
+ cursor.remove()
+ cursor.close()
+ s.prepare_transaction('prepare_timestamp=' + timestamp_str(20))
+
+ # Configure debug behavior on a cursor to evict the page positioned on when the reset API is used.
+ evict_cursor = self.session.open_cursor(uri, None, "debug=(release_evict)")
+
+ # Search for the key so we position our cursor on the page that we want to evict.
+ self.session.begin_transaction("ignore_prepare = true")
+ evict_cursor.set_key(str(0))
+ self.assertEquals(evict_cursor.search(), WT_NOTFOUND)
+ evict_cursor.reset()
+ evict_cursor.close()
+ self.session.commit_transaction()
+
+ self.session.begin_transaction("ignore_prepare = true")
+ cursor2 = self.session.open_cursor(uri)
+ cursor2.set_key(str(0))
+ self.assertEquals(cursor2.search(), WT_NOTFOUND)
+ self.session.commit_transaction()