rbd: Remove invalid snap ID test skip

Fix for https://tracker.ceph.com/issues/47287 is now available with
quincy and above releases. Therefore do not skip GetSnapTimestamp
API test for an invalid snap ID.

Signed-off-by: Anoop C S <anoopcs@cryptolab.net>

rbd/snapshot_test.go

@@ -1,12 +1,34 @@
 package rbd
 
 import (
+	"os"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
 
+var (
+	serverVersion string
+)
+
+const (
+	cephNautilus = "nautilus"
+	cephOctopus  = "octopus"
+	cephPacfic   = "pacific"
+	cephQuincy   = "quincy"
+	cephReef     = "reef"
+	cephSquid    = "squid"
+	cephMain     = "main"
+)
+
+func init() {
+	switch vname := os.Getenv("CEPH_VERSION"); vname {
+	case cephNautilus, cephOctopus, cephPacfic, cephQuincy, cephReef, cephSquid, cephMain:
+		serverVersion = vname
+	}
+}
+
 func TestCreateSnapshot(t *testing.T) {
 	conn := radosConnect(t)
 
@@ -138,7 +160,11 @@ func TestGetSnapTimestamp(t *testing.T) {
 	})
 
 	t.Run("invalidSnapID", func(t *testing.T) {
-		t.Skip("hits assert due to https://tracker.ceph.com/issues/47287")
+		switch serverVersion {
+		case cephNautilus, cephOctopus, cephPacfic:
+			t.Skip("hits assert due to https://tracker.ceph.com/issues/47287")
+		}
+
 		imgName := "someImage"
 		img, err := Create(ioctx, imgName, testImageSize, testImageOrder, 1)
 		assert.NoError(t, err)
@@ -156,6 +182,7 @@ func TestGetSnapTimestamp(t *testing.T) {
 		snapID = 22
 		_, err = img.GetSnapTimestamp(snapID)
 		assert.Error(t, err)
+		assert.Equal(t, err, ErrNotExist)
 	})
 
 	t.Run("happyPath", func(t *testing.T) {