1 files changed, 48 insertions, 0 deletions
diff --git a/obnamlib/checksummer_tests.py b/obnamlib/checksummer_tests.py
new file mode 100644
index 00000000..10473740
--- /dev/null
+++ b/obnamlib/checksummer_tests.py
@@ -0,0 +1,48 @@
+# 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 TestGetChecksummer(unittest.TestCase):
+
+    def test_knows_some_algorithms(self):
+        self.assertEqual(type(obnamlib.checksum_algorithms), list)
+        self.assertNotEqual(obnamlib.checksum_algorithms, [])
+
+    def test_raises_error_if_algorithm_is_unknown(self):
+        self.assertRaises(
+            obnamlib.ObnamError, obnamlib.get_checksum_algorithm, 'unknown')
+
+    def test_returns_working_sha512(self):
+        summer = obnamlib.get_checksum_algorithm('sha512')
+        summer.update('hello, world')
+        self.assertEqual(
+            summer.hexdigest(),
+            '8710339dcb6814d0d9d2290ef422285c9322b7163951f9a0ca8f883d3305286f'
+            '44139aa374848e4174f5aada663027e4548637b6d19894aec4fb6c46a139fbf9')
+
+    def test_every_algorithm_has_right_api(self):
+        for name in obnamlib.checksum_algorithms:
+            summer = obnamlib.get_checksum_algorithm(name)
+            summer.update('hello, world')
+            checksum = summer.hexdigest()
+            self.assertEqual(type(checksum), str)
+            self.assertNotEqual(checksum, '')