{
			[]madmin.PeerInfo{},
			set.CreateStringSet(),
			set.CreateStringSet("dep1", "dep2", "dep3", "dep4"),
			[]string{},
		},
	}

	for i, tc := range testCases {
		names := getMissingSiteNames(tc.oldDepIDs, tc.newDepIDs, tc.currSites)
		if len(names) != len(tc.expNames) {
			t.Errorf("Test %d: Expected `%v`, got `%v`", i+1, tc.expNames, names)
		}
	}

		if currDeploymentIDsSet.Equals(deploymentIDsSet) {
			return madmin.ReplicateAddStatus{}, errSRCannotJoin
		}
		if len(currDeploymentIDsSet.Intersection(deploymentIDsSet)) != len(currDeploymentIDsSet) {
			diffSlc := getMissingSiteNames(currDeploymentIDsSet, deploymentIDsSet, currSites.Sites)
			return madmin.ReplicateAddStatus{}, errSRInvalidRequest(fmt.Errorf("all existing replicated sites must be specified - missing %s", strings.Join(diffSlc, " ")))
		}