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Diffstat (limited to 'src/third_party/wiredtiger/test/suite/test_cursor_random03.py')
| -rw-r--r-- | src/third_party/wiredtiger/test/suite/test_cursor_random03.py | 77 |
1 files changed, 0 insertions, 77 deletions
diff --git a/src/third_party/wiredtiger/test/suite/test_cursor_random03.py b/src/third_party/wiredtiger/test/suite/test_cursor_random03.py deleted file mode 100644 index 4d8696f63ea..00000000000 --- a/src/third_party/wiredtiger/test/suite/test_cursor_random03.py +++ /dev/null @@ -1,77 +0,0 @@ -#!/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 wtdataset import SimpleDataSet - -# test_cursor_random03.py -# This python test reproduces the WT-12225 bug where the same stream of numbers are generated -# from the random cursor. In the presence of where all the values are the insert list, open up -# two cursors close to each other in time, and both cursors will return back the exact same stream -# of records again. The test makes sure that records returned in both cursors return at least -# one record that is different, ensuring that the stream of numbers returned from __wt_random -# are not in the same pattern. -class test_cursor_random03(wttest.WiredTigerTestCase): - def test_cursor_random_bug(self): - uri = 'table:random' - - # Do not change the chosen number of records. The records is to make sure that - # the skip insert list random estimate is a power of 2 to act as a mask. - # Also set the leaf-page-max value, otherwise the page might split. - ds = SimpleDataSet(self, uri, 2135, config='leaf_page_max=100MB') - ds.populate() - - for _ in range(0, 5000): - random_keys = [] - - cursor = self.session.open_cursor(uri, None, 'next_random=true') - - # Perform 100 nexts and append to our random keys. - for _ in range(0, 100): - self.assertEqual(cursor.next(), 0) - current = cursor.get_key() - random_keys.append(current) - cursor.close() - - # The random cursor initial seed is time based, reset the initial random seed again - # to make sure that we have not generated with the same random numbers - cursor = self.session.open_cursor(uri, None, 'next_random=true') - found_different = False - for i in range(0, 100): - self.assertEqual(cursor.next(), 0) - current = cursor.get_key() - # Exit early once we found a key that is different. - if (random_keys[i] != current): - found_different = True - break - cursor.close() - - # We expect that the values between two recently opened cursors return different stream - # of records. - self.assertTrue(found_different) - |