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# Copyright 2011 Canonical Ltd.
#
# This file is part of u1db.
#
# u1db is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License version 3
# as published by the Free Software Foundation.
#
# u1db is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with u1db.  If not, see <http://www.gnu.org/licenses/>.

"""Test common backend bits."""

from u1db import (
    backends,
    tests,
    )


class TestCommonBackendImpl(tests.TestCase):

    def test__allocate_doc_id(self):
        db = backends.CommonBackend()
        doc_id1 = db._allocate_doc_id()
        self.assertTrue(doc_id1.startswith('D-'))
        self.assertEqual(34, len(doc_id1))
        int(doc_id1[len('D-'):], 16)
        self.assertNotEqual(doc_id1, db._allocate_doc_id())