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-rw-r--r--u1db/tests/test_common_backend.py33
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diff --git a/u1db/tests/test_common_backend.py b/u1db/tests/test_common_backend.py
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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())