#!/usr/bin/env python
#
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# Public Domain 2008-2014 WiredTiger, Inc.
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# test_config08.py
#   Test the configuration that enables/disables dirty table flushing.
#

import wiredtiger, wttest
from wtscenario import make_scenarios

class test_config08(wttest.WiredTigerTestCase):

    logging = [
        ('log_off', dict(logging='false')),
        ('log_on', dict(logging='true')),
    ]
    flush = [
        ('flush_off', dict(flush='false')),
        ('flush_on', dict(flush='true')),
    ]

    scenarios = make_scenarios(logging, flush)

    # This test varies the logging and file flush settings and therefore needs to set up its own
    # connection config. Override the standard method.
    def conn_config(self):
        return 'create,log=(enabled={}),file_close_sync={}'.\
            format(self.logging,self.flush)

    def test_config08(self):
        # Create a table with logging setting matching the connection level config.
        table_params = 'key_format=i,value_format=S,log=(enabled={})'.format(self.logging)
        self.uri = 'table:config_test'

        # Create a table with some data.
        self.session.create(self.uri, table_params)
        c = self.session.open_cursor(self.uri, None)
        c[0] = 'ABC' * 4096
        c[1] = 'DEF' * 4096
        c[2] = 'GHI' * 4096
        c.close()

        # API calls that require exclusive file handles should return EBUSY if file_close_sync is
        # set to false and logging is disabled.
        if self.logging == 'false' and self.flush == 'false':
            # WT won't allow this operation as exclsuive file handle is not possible
            # with modified table.
            self.assertTrue(self.raisesBusy(lambda: self.session.verify(self.uri, None)),
                "was expecting API call to fail with EBUSY")

            # Taking a checkopoint should make WT happy.
            self.session.checkpoint()
            self.session.verify(self.uri, None)
        else:
            # All other combinations of configs should not return EBUSY.
            self.session.verify(self.uri, None)

        # This will catch a bug if we return EBUSY from final shutdown.
        self.conn.close()

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