test/pybind: add create_snap rasie ImageExists test case

Signed-off-by: Gangbiao Liu <liugangbiao@cmss.chinamobile.com>

diff --git a/src/test/pybind/test_rbd.py b/src/test/pybind/test_rbd.py
index 77c0e2df353d710b67b0af386fe92bbaa438b6e7..2795d90133490e0abda662e581bb6d04cd22a50f 100644 (file)
--- a/src/test/pybind/test_rbd.py
+++ b/src/test/pybind/test_rbd.py
@@ -741,6 +741,11 @@ class TestImage(object):
         eq(snap_data, b'\0' * 256)
         self.image.remove_snap('snap1')
 
+    def test_create_snap_exists(self):
+        self.image.create_snap('snap1')
+        assert_raises(ImageExists, self.image.create_snap, 'snap1')
+        self.image.remove_snap('snap1')
+
     def test_list_snaps(self):
         eq([], list(self.image.list_snaps()))
         self.image.create_snap('snap1')