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consul_test.go
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consul_test.go
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// Copyright © 2022 Roberto Hidalgo <coredns-consul@un.rob.mx>
// SPDX-License-Identifier: Apache-2.0
package catalog
import (
"fmt"
"testing"
"github.com/hashicorp/consul/api"
)
type testServiceData struct {
Tags []string
Meta map[string]string
Address string
}
type TestCatalogClient struct {
services map[string][]*testServiceData
lastIndex uint64
}
func NewTestCatalogClient() ClientCatalog {
return &TestCatalogClient{
lastIndex: 4,
services: map[string][]*testServiceData{
"nomad": {
{
Address: "192.168.100.1",
Tags: []string{
"coredns.enabled",
"traefik.enable=true",
},
Meta: map[string]string{
"coredns-acl": "allow private",
},
},
},
"nomad-client": {
{
Address: "192.168.100.1",
Tags: []string{},
Meta: map[string]string{},
},
},
"traefik": {
{
Address: "192.168.100.2",
Tags: []string{
"coredns.enabled",
"traefik.enable=true",
},
Meta: map[string]string{
"coredns-acl": "allow private, guest; deny public",
},
},
},
"git": {
{
Address: "192.168.100.3",
Tags: []string{"coredns.enabled"},
Meta: map[string]string{
"coredns-acl": "deny guest; allow public",
},
},
{
Address: "192.168.100.4",
Tags: []string{"coredns.enabled"},
Meta: map[string]string{
"coredns-acl": "deny guest; allow public",
},
},
},
},
}
}
func (c *TestCatalogClient) DeleteService(name string) {
if _, ok := c.services[name]; !ok {
Log.Infof("deleting unknong service")
}
delete(c.services, name)
}
func (c *TestCatalogClient) Service(name string, tag string, opts *api.QueryOptions) ([]*api.CatalogService, *api.QueryMeta, error) {
sd, ok := c.services[name]
if !ok {
return []*api.CatalogService{}, nil, fmt.Errorf("Not found")
}
services := []*api.CatalogService{}
for _, nodeService := range sd {
services = append(services, &api.CatalogService{
ID: "42",
ServiceName: name,
Node: fmt.Sprintf("node-%s", nodeService.Address),
Address: nodeService.Address,
ServiceMeta: nodeService.Meta,
ServiceTags: nodeService.Tags,
})
}
return services, &api.QueryMeta{}, nil
}
func (c *TestCatalogClient) Services(*api.QueryOptions) (map[string][]string, *api.QueryMeta, error) {
services := map[string][]string{}
for name, svc := range c.services {
services[name] = svc[0].Tags
}
c.lastIndex = uint64(len(services))
return services, &api.QueryMeta{LastIndex: c.lastIndex}, nil
}
type TestKVClient struct{}
func NewTestKVClient() KVClient {
return &TestKVClient{}
}
func (kv *TestKVClient) Get(path string, opts *api.QueryOptions) (*api.KVPair, *api.QueryMeta, error) {
data := []byte(`{"consul": {"target": "traefik", "acl": ["allow private"]}}`)
return &api.KVPair{
Value: data,
}, &api.QueryMeta{LastIndex: 1}, nil
}
func TestFetchConfig(t *testing.T) {
c, _ := NewTestCatalog(false)
if err := c.FetchConfig(); err != nil {
t.Fatalf("Failed fetching config, %s", err)
}
svc := c.ServiceFor("consul")
if svc == nil {
t.Fatalf("Service consul not found")
}
if svc.Target != "traefik" {
t.Fatalf("Unexpected target: %v", svc.Target)
}
}
func TestFetchServices(t *testing.T) {
c, client := NewTestCatalog(true)
services := c.Services()
if len(services) != 3 {
t.Fatalf("Unexpected number of services: %d", len(services))
}
svcTests := map[string]string{
"nomad": "traefik",
"traefik": "traefik",
"git": "git",
}
for svc, expected := range svcTests {
target, exists := services[svc]
if !exists {
t.Fatalf("Expected service %s not found", svc)
}
if target.Target != expected {
t.Fatalf("Unexpected target: %v", target)
}
}
lastUpdate := c.LastUpdated()
err := c.FetchServices()
if err != nil {
t.Fatalf("Fetch services: %v", err)
}
if lastUpdate != c.LastUpdated() {
t.Fatalf("Services changed after timeout")
}
err = c.FetchServices()
if err != nil {
t.Fatalf("Fetch services: %v", err)
}
testclient := client.(*TestCatalogClient)
testclient.DeleteService("git")
if err := c.FetchServices(); err != nil {
t.Fatalf("could not fetch services: %s", err)
}
if lastUpdate == c.LastUpdated() {
t.Fatalf("Services did not change after update")
}
if newCount := len(c.Services()); newCount != 2 {
t.Fatalf("Unexpected number of services after update: %d", newCount)
}
}