#!/usr/bin/env python
#
# Public Domain 2014-2019 MongoDB, Inc.
# Public Domain 2008-2014 WiredTiger, Inc.
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import wiredtiger, wtscenario, wttest
from wtdataset import SimpleDataSet

# test_lsm03.py
#    Check to make sure that LSM schema operations don't get EBUSY when
#    there are no user operations active.
class test_lsm03(wttest.WiredTigerTestCase):
    name = 'test_lsm03'

    # Use small pages so we generate some internal layout
    # Setup LSM so multiple chunks are present
    config = 'allocation_size=512,internal_page_max=512' + \
             ',leaf_page_max=1k,lsm=(chunk_size=512k,merge_min=10)'

    # Populate an object then drop it.
    def test_lsm_drop_active(self):
        uri = 'lsm:' + self.name
        ds = SimpleDataSet(self, uri, 10000, config=self.config)
        ds.populate()

        # Force to disk
        self.reopen_conn()

        # An open cursors should cause failure.
        cursor = self.session.open_cursor(uri, None, None)
        self.assertRaises(wiredtiger.WiredTigerError,
            lambda: self.session.drop(uri, None))
        cursor.close()

        # Add enough records that a merge should be running
        ds = SimpleDataSet(self, uri, 50000, config=self.config)
        ds.populate()
        # The drop should succeed even when LSM work units are active
        self.session.drop(uri)