1 files changed, 33 insertions, 0 deletions
diff --git a/u1db/tests/test_common_backend.py b/u1db/tests/test_common_backend.py
new file mode 100644
index 00000000..8c7c7ed9
--- /dev/null
+++ b/u1db/tests/test_common_backend.py
@@ -0,0 +1,33 @@
+# 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())