func F() int               { checkorder(0); return 0 }
func G(bool) int           { checkorder(9); return 0 }
func H(int, bool, int) int { checkorder(7); return 0 }
func I(int) bool           { checkorder(8); return true }
func J() int               { checkorder(4); return 0 }
func K() int               { checkorder(6); return 0 }
func L() int               { checkorder(10); return 0 }

func main() {

// check order of operations by ensuring that
// successive calls to checkorder have increasing o values.
func checkorder(o int) {
	if o <= order {
		println("invalid order", o, "after", order)
		panic("order")
	}
	order = o
}

func fc(c chan int, o int) chan int {
	checkorder(o)
	return c
}

func fp(p *int, o int) *int {
	checkorder(o)
	return p
}

func fn(n, o int) int {

			assert.Equal(t, gotOrder, wantOrder)
		}

		vses := []config.Config{root, delegate, normal}
		checkOrder(mergeVirtualServicesIfNeeded(vses, sets.New(visibility.Public)))

		vses = []config.Config{normal, delegate, root}
		checkOrder(mergeVirtualServicesIfNeeded(vses, sets.New(visibility.Public)))
	})
}

func TestMergeHttpRoutes(t *testing.T) {
	dstV1 := &networking.Destination{