tests: correct update_features test for FAST_DIFF feature

Signed-off-by: Jason Dillaman <dillaman@redhat.com>

diff --git a/src/test/librbd/test_librbd.cc b/src/test/librbd/test_librbd.cc
index 78aa476e8dbe7110b37179408af92675c6d77b22..66bf4901572b12f04037f6054aee3ac20f67582c 100644 (file)
--- a/src/test/librbd/test_librbd.cc
+++ b/src/test/librbd/test_librbd.cc
@@ -2870,16 +2870,26 @@ TEST_F(TestLibRBD, UpdateFeatures)
   ASSERT_EQ(-EINVAL, image.update_features(0, true));
 
   ASSERT_EQ(0, image.update_features(RBD_FEATURE_EXCLUSIVE_LOCK |
-                                       RBD_FEATURE_OBJECT_MAP, false));
+                                       RBD_FEATURE_OBJECT_MAP |
+                                       RBD_FEATURE_FAST_DIFF, false));
 
   // cannot enable object map w/o exclusive lock
   ASSERT_EQ(-EINVAL, image.update_features(RBD_FEATURE_OBJECT_MAP, true));
-
   ASSERT_EQ(0, image.update_features(RBD_FEATURE_EXCLUSIVE_LOCK, true));
-  ASSERT_EQ(0, image.update_features(RBD_FEATURE_OBJECT_MAP, true));
+
+  // cannot enable fast diff w/o object map
+  ASSERT_EQ(-EINVAL, image.update_features(RBD_FEATURE_FAST_DIFF, true));
+  ASSERT_EQ(0, image.update_features(RBD_FEATURE_OBJECT_MAP |
+                                       RBD_FEATURE_FAST_DIFF, true));
+
+  // cannot disable object map w/ fast diff
+  ASSERT_EQ(-EINVAL, image.update_features(RBD_FEATURE_OBJECT_MAP, false));
+  ASSERT_EQ(0, image.update_features(RBD_FEATURE_FAST_DIFF, false));
 
   // cannot disable exclusive lock w/ object map
   ASSERT_EQ(-EINVAL, image.update_features(RBD_FEATURE_EXCLUSIVE_LOCK, false));
+  ASSERT_EQ(0, image.update_features(RBD_FEATURE_OBJECT_MAP, false));
+  ASSERT_EQ(0, image.update_features(RBD_FEATURE_EXCLUSIVE_LOCK, false));
 }
 
 TEST_F(TestLibRBD, RebuildObjectMap)