122 lines
5.0 KiB
Python
122 lines
5.0 KiB
Python
#!/usr/bin/env python
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#
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# Public Domain 2008-2014 WiredTiger, Inc.
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#
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# This is free and unencumbered software released into the public domain.
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#
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# Anyone is free to copy, modify, publish, use, compile, sell, or
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# distribute this software, either in source code form or as a compiled
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# binary, for any purpose, commercial or non-commercial, and by any
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# means.
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#
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# In jurisdictions that recognize copyright laws, the author or authors
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# of this software dedicate any and all copyright interest in the
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# software to the public domain. We make this dedication for the benefit
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# of the public at large and to the detriment of our heirs and
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# successors. We intend this dedication to be an overt act of
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# relinquishment in perpetuity of all present and future rights to this
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# software under copyright law.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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# IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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# OTHER DEALINGS IN THE SOFTWARE.
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import wiredtiger, wttest
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from helper import complex_populate, simple_populate
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# test_cursor_random.py
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# Cursor next_random operations
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class test_cursor_random(wttest.WiredTigerTestCase):
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scenarios = [
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('file', dict(type='file:',fmt='S')),
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('table', dict(type='table:',fmt='S'))
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]
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# Check that opening a random cursor on a row-store returns not-supported
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# for every method except for next and reset, and next returns not-found.
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def test_cursor_random_column(self):
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uri = self.type + 'random'
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self.session.create(uri, 'key_format=' + self.fmt + ',value_format=S')
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cursor = self.session.open_cursor(uri, None, "next_random=true")
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self.assertRaises(
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wiredtiger.WiredTigerError, lambda: cursor.compare(cursor))
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self.assertRaises(wiredtiger.WiredTigerError, lambda: cursor.prev())
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self.assertRaises(wiredtiger.WiredTigerError, lambda: cursor.search())
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self.assertRaises(
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wiredtiger.WiredTigerError, lambda: cursor.search_near())
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self.assertRaises(wiredtiger.WiredTigerError, lambda: cursor.insert())
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self.assertRaises(wiredtiger.WiredTigerError, lambda: cursor.update())
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self.assertRaises(wiredtiger.WiredTigerError, lambda: cursor.remove())
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cursor.reset()
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self.assertTrue(cursor.next(), wiredtiger.WT_NOTFOUND)
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cursor.close()
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# Check that next_random works with a single value, repeatedly.
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def test_cursor_random_single_record(self):
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uri = self.type + 'random'
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self.session.create(uri, 'key_format=' + self.fmt + ',value_format=S')
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cursor = self.session.open_cursor(uri, None)
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cursor.set_key('AAA')
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cursor.set_value('BBB')
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cursor.insert()
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cursor.close
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cursor = self.session.open_cursor(uri, None, "next_random=true")
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for i in range(1,5):
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cursor.next()
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self.assertEquals(cursor.get_key(), 'AAA')
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cursor.close
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# Check that next_random works in the presence of a larger set of values.
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def test_cursor_random_multiple_records(self):
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uri = self.type + 'random'
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if self.type == 'file:':
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simple_populate(self, uri,
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'allocation_size=512,leaf_page_max=512,key_format=' +\
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self.fmt, 10000)
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else:
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complex_populate(self, uri,
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'allocation_size=512,leaf_page_max=512,key_format=' +\
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self.fmt, 10000)
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# Close the connection so everything is forced to disk (otherwise the
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# values are on an insert list and the underlying engine doesn't make
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# random selections, it selects the middle of the list.
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self.conn.close()
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self.conn = self.setUpConnectionOpen(".")
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self.session = self.conn.open_session()
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cursor = self.session.open_cursor(uri, None, "next_random=true")
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last = ''
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match = 0
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for i in range(1,10):
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cursor.next()
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current = cursor.get_key()
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if current == last:
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match += 1
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last = current
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self.assertLess(match, 5,
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'next_random did not return random records, too many matches found')
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# Check that opening a random cursor on column-store returns not-supported.
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class test_cursor_random_column(wttest.WiredTigerTestCase):
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scenarios = [
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('file', dict(uri='file:random',fmt='r')),
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('table', dict(uri='table:random',fmt='r')),
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]
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def test_cursor_random_column(self):
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self.session.create(
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self.uri, 'key_format=' + self.fmt + ',value_format=S')
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cursor = self.session.open_cursor(self.uri, None, "next_random=true")
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self.assertRaises(wiredtiger.WiredTigerError, lambda: cursor.next())
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cursor.close()
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if __name__ == '__main__':
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wttest.run()
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