diff options
Diffstat (limited to 'src/third_party/wiredtiger/test/suite/test_empty.py')
-rw-r--r-- | src/third_party/wiredtiger/test/suite/test_empty.py | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/src/third_party/wiredtiger/test/suite/test_empty.py b/src/third_party/wiredtiger/test/suite/test_empty.py new file mode 100644 index 00000000000..50b79db70e4 --- /dev/null +++ b/src/third_party/wiredtiger/test/suite/test_empty.py @@ -0,0 +1,99 @@ +#!/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() |