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+#!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 wiredtiger, wttest
+from helper import simple_populate, key_populate, value_populate
+from wtscenario import check_scenarios
+
+# test_cursor_pin.py
+# Smoke-test fast-path searching for pinned pages before re-descending
+# the tree.
+class test_cursor_pin(wttest.WiredTigerTestCase):
+ uri = 'file:cursor_pin'
+ nentries = 10000
+ config = 'allocation_size=512,leaf_page_max=512,value_format=S,key_format='
+ scenarios = check_scenarios([
+ ('recno', dict(keyfmt='r')),
+ ('string', dict(keyfmt='S')),
+ ])
+
+ # Create a multi-page file, confirm that a simple search to the local
+ # page works, followed by a search to a different page.
+ def test_smoke(self):
+ simple_populate(self,
+ self.uri, self.config + self.keyfmt, self.nentries)
+ self.reopen_conn()
+ c = self.session.open_cursor(self.uri, None)
+ c.set_key(key_populate(c, 100))
+ self.assertEqual(c.search(), 0)
+ self.assertEqual(c.get_value(), value_populate(c, 100))
+ c.set_key(key_populate(c, 101))
+ self.assertEqual(c.search(), 0)
+ self.assertEqual(c.get_value(), value_populate(c, 101))
+ c.set_key(key_populate(c, 9999))
+ self.assertEqual(c.search(), 0)
+ self.assertEqual(c.get_value(), value_populate(c, 9999))
+
+ # Forward check.
+ def forward(self, c, max, notfound):
+ for i in range(1, max + 1):
+ c.set_key(key_populate(c, i))
+ if i in notfound:
+ self.assertEqual(c.search(), wiredtiger.WT_NOTFOUND)
+ else:
+ self.assertEqual(c.search(), 0)
+ self.assertEqual(c.get_value(), value_populate(c, i))
+
+ # Backward check.
+ def backward(self, c, max, notfound):
+ for i in range(max, 0, -1):
+ c.set_key(key_populate(c, i))
+ if i in notfound:
+ self.assertEqual(c.search(), wiredtiger.WT_NOTFOUND)
+ else:
+ self.assertEqual(c.search(), 0)
+ self.assertEqual(c.get_value(), value_populate(c, i))
+
+ # Create a multi-page file, search backward, forward to check page
+ # boundaries.
+ def test_basic(self):
+ simple_populate(self,
+ self.uri, self.config + self.keyfmt, self.nentries)
+ self.reopen_conn()
+ c = self.session.open_cursor(self.uri, None)
+ self.forward(c, self.nentries, [])
+ self.backward(c, self.nentries, [])
+
+ # Create a multi-page file with a big chunk of missing space in the
+ # middle (to exercise column-store searches).
+ def test_missing(self):
+ simple_populate(self,
+ self.uri, self.config + self.keyfmt, self.nentries)
+ c = self.session.open_cursor(self.uri, None)
+ for i in range(self.nentries + 3000, self.nentries + 5001):
+ c[key_populate(c, i)] = value_populate(c, i)
+ self.reopen_conn()
+ c = self.session.open_cursor(self.uri, None)
+ self.forward(c, self.nentries + 5000,
+ list(range(self.nentries + 1, self.nentries + 3000)))
+ self.backward(c, self.nentries + 5000,
+ list(range(self.nentries + 1, self.nentries + 3000)))
+
+ # Insert into the empty space so we test searching inserted items.
+ for i in range(self.nentries + 1000, self.nentries + 2001):
+ c[key_populate(c, i)] = value_populate(c, i)
+ self.forward(c, self.nentries + 5000,
+ list(range(self.nentries + 1, self.nentries + 1000) +\
+ range(self.nentries + 2001, self.nentries + 3000)))
+ self.backward(c, self.nentries + 5000,
+ list(range(self.nentries + 1, self.nentries + 1000) +\
+ range(self.nentries + 2001, self.nentries + 3000)))
+
+
+if __name__ == '__main__':
+ wttest.run()