t.Errorf("Get() failed: gotFound=%v wantFound=%v\ngot %+vwant %+v",
				gotFound, c.found, spew.Sdump(gotPort), spew.Sdump(c.port))
		}
	}
}

func TestSubsetKey(t *testing.T) {
	hostname := host.Name("hostname")
	cases := []struct {
		hostname host.Name
		subset   string
		port     int
		want     string
	}{
		{
			hostname: "hostname",