tests: verify fast diff support in rebuild object map

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 134a08bde806c93f421c1979a32064e345edcf2f..38c294c1f5f8a9f6c2d95812b358197f8d899e00 100644 (file)
--- a/src/test/librbd/test_librbd.cc
+++ b/src/test/librbd/test_librbd.cc
@@ -2939,6 +2939,9 @@ TEST_F(TestLibRBD, RebuildObjectMap)
 
     ASSERT_EQ(bl.length(), image.write(0, bl.length(), bl));
 
+    ASSERT_EQ(0, image.snap_create("snap1"));
+    ASSERT_EQ(bl.length(), image.write(1<<order, bl.length(), bl));
+
     librbd::image_info_t info;
     ASSERT_EQ(0, image.stat(info, sizeof(info)));
 
@@ -2969,6 +2972,10 @@ TEST_F(TestLibRBD, RebuildObjectMap)
   ASSERT_EQ(bl.length(), image2.read(0, bl.length(), read_bl));
   ASSERT_TRUE(bl.contents_equal(read_bl));
 
+  read_bl.clear();
+  ASSERT_EQ(bl.length(), image2.read(1<<order, bl.length(), read_bl));
+  ASSERT_TRUE(bl.contents_equal(read_bl));
+
   ASSERT_PASSED(validate_object_map, image1);
   ASSERT_PASSED(validate_object_map, image2);
 }