1 files changed, 42 insertions, 0 deletions
diff --git a/src/pybind/mgr/dashboard/tests/test_cephfs.py b/src/pybind/mgr/dashboard/tests/test_cephfs.py
new file mode 100644
index 000000000..ae4253543
--- /dev/null
+++ b/src/pybind/mgr/dashboard/tests/test_cephfs.py
@@ -0,0 +1,42 @@
+# -*- coding: utf-8 -*-
+from collections import defaultdict
+
+try:
+    from mock import Mock
+except ImportError:
+    from unittest.mock import patch, Mock
+
+from ..controllers.cephfs import CephFS
+from ..tests import ControllerTestCase
+
+
+class MetaDataMock(object):
+    def get(self, _x, _y):
+        return 'bar'
+
+
+def get_metadata_mock(key, meta_key):
+    return {
+        'mds': {
+            None: None,  # Unknown key
+            'foo': MetaDataMock()
+        }[meta_key]
+    }[key]
+
+
+@patch('dashboard.mgr.get_metadata', Mock(side_effect=get_metadata_mock))
+class CephFsTest(ControllerTestCase):
+    cephFs = CephFS()
+
+    def test_append_of_mds_metadata_if_key_is_not_found(self):
+        mds_versions = defaultdict(list)
+        # pylint: disable=protected-access
+        self.cephFs._append_mds_metadata(mds_versions, None)
+        self.assertEqual(len(mds_versions), 0)
+
+    def test_append_of_mds_metadata_with_existing_metadata(self):
+        mds_versions = defaultdict(list)
+        # pylint: disable=protected-access
+        self.cephFs._append_mds_metadata(mds_versions, 'foo')
+        self.assertEqual(len(mds_versions), 1)
+        self.assertEqual(mds_versions['bar'], ['foo'])