},
		{
			subsetkey: "outbound|80|subset||hostname",
			expectErr: true,
		},
		{
			subsetkey: "",
			expectErr: true,
		},
	}

	for _, c := range cases {
		err := IsValidSubsetKey(c.subsetkey)
		if !err != c.expectErr {
			t.Errorf("got %v but want %v\n", err, c.expectErr)
		}
	}
}

func TestWorkloadInstanceEqual(t *testing.T) {
	exampleInstance := &WorkloadInstance{

	return string(direction) + "_." + strconv.Itoa(port) + "_." + subsetName + "_." + string(hostname)
}

// IsValidSubsetKey checks if a string is valid for subset key parsing.
func IsValidSubsetKey(s string) bool {
	return strings.Count(s, "|") == 3
}

// IsDNSSrvSubsetKey checks whether the given key is a DNSSrv key (built by BuildDNSSrvSubsetKey).