1 files changed, 49 insertions, 0 deletions
diff --git a/obnamlib/fmt_ga/cowtree_tests.py b/obnamlib/fmt_ga/cowtree_tests.py
new file mode 100644
index 00000000..7e8dd114
--- /dev/null
+++ b/obnamlib/fmt_ga/cowtree_tests.py
@@ -0,0 +1,49 @@
+# Copyright 2016  Lars Wirzenius
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+# =*= License: GPL-3+ =*=
+
+
+import unittest
+
+import obnamlib
+
+
+class CowTreeTests(unittest.TestCase):
+
+    def setUp(self):
+        self.ls = obnamlib.InMemoryLeafStore()
+        self.cow = obnamlib.CowTree()
+        self.cow.set_leaf_store(self.ls)
+
+    def test_lookup_returns_none_if_key_is_missing(self):
+        self.assertEqual(self.cow.lookup(42), None)
+
+    def test_returns_keyvalue_that_has_been_inserted(self):
+        key = 'fookey'
+        value = 'barvalue'
+        self.cow.insert(key, value)
+        self.assertEqual(self.cow.lookup(key), value)
+
+    def test_commits_changes_persistently(self):
+        key = 'fookey'
+        value = 'barvalue'
+        self.cow.insert(key, value)
+        list_id = self.cow.commit()
+
+        cow2 = obnamlib.CowTree()
+        cow2.set_leaf_store(self.ls)
+        cow2.set_list_node(list_id)
+        self.assertEqual(cow2.lookup(key), value)