test_compute.go

package main

import (
	"fmt"
	"os"

	"github.com/gophercloud/gophercloud"
	"github.com/gophercloud/gophercloud/openstack/compute/v2/servers"
	"github.com/gophercloud/utils/openstack/clientconfig"
)

const (
	serviceCompute = "compute"
	serverNoSG     = "cec5b2ee-deb2-4c15-be03-4c7a732e24cb"
	serverWithSG   = "e53bfe24-e183-45e4-9507-5e1e4e9c1a56"

	microversionLow  = "2.60"
	microversionHigh = "2.71"
)

// client generates a Gophercloud client for the given service. Available
// services are exposed from this file as constants.
func client(service string) (*gophercloud.ServiceClient, error) {
	opts := &clientconfig.ClientOpts{
		Cloud: os.Getenv("OS_CLOUD"),
	}
	return clientconfig.NewServiceClient(service, opts)
}

func printResult(computeClient *gophercloud.ServiceClient, serverWithGroup bool, microversion string) {
	defer func(baseMicroversion string) {
		computeClient.Microversion = baseMicroversion
	}(computeClient.Microversion)
	computeClient.Microversion = microversion

	var serverID string
	if serverWithGroup {
		serverID = serverWithSG
	} else {
		serverID = serverNoSG
	}

	s, err := servers.Get(computeClient, serverID).Extract()
	if err != nil {
		panic(err)
	}

	fmt.Printf("|%s|%t|%t|%d|\n", computeClient.Microversion, serverWithGroup, s.ServerGroups == nil, len(s.ServerGroups))
}

func main() {
	computeClient, err := client(serviceCompute)
	if err != nil {
		panic(err)
	}

	fmt.Printf("|call microversion|server has SG|ServerGroups is nil |len(ServerGroups)|\n|-|-|-|-|\n")
	for _, microversion := range [...]string{microversionLow, microversionHigh} {
		for _, hasServerGroup := range [...]bool{false, true} {
			printResult(computeClient, hasServerGroup, microversion)
		}
	}
}