#!usr/bin/env python
#
# Public Domain 2014-2015 MongoDB, Inc.
# Public Domain 2008-2014 WiredTiger, Inc.
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import helper, random, wiredtiger, wttest
from helper import simple_populate

# test_bug011.py
#    Eviction working on more files than there are hazard pointers.
class test_bug011(wttest.WiredTigerTestCase):
    """
    Test having eviction working on more files than the number of
    allocated hazard pointers.
    """
    table_name = 'test_bug011'
    ntables = 50
    nrows = 10000
    nops = 10000

    # Overrides WiredTigerTestCase
    def setUpConnectionOpen(self, dir):
        self.home = dir
        conn_params = 'create,cache_size=10MB,' \
                      'hazard_max=' + str(self.ntables / 2)
        conn = wiredtiger.wiredtiger_open(dir, conn_params)
        self.pr(`conn`)
        return conn

    def test_eviction(self):
        cursors = []
        for i in range(0, self.ntables):
            this_uri = 'table:%s-%03d' % (self.table_name, i)
            simple_populate(self, this_uri,
                'key_format=S,allocation_size=1KB,leaf_page_max=1KB',
                self.nrows)

        # Switch over to on-disk trees with multiple leaf pages
        self.reopen_conn()

        # Make sure we have a cursor for the table so it stays in cache.
        for i in range(0, self.ntables):
            this_uri = 'table:%s-%03d' % (self.table_name, i)
            cursors.append(self.session.open_cursor(this_uri, None)) 

        # Make use of the cache.
        for i in range(0, self.nops):
            for i in range(0, self.ntables):
                cursors[i].set_key(helper.key_populate(cursors[i],
                    random.randint(0, self.nrows - 1)))
                cursors[i].search()
                cursors[i].reset()

if __name__ == '__main__':
    wttest.run()
