package zk
import (
"testing"
"time"
"github.com/go-kit/kit/sd"
)
var _ sd.Instancer = &Instancer{}
func TestInstancer(t *testing.T) {
client := newFakeClient()
instancer, err := NewInstancer(client, path, logger)
if err != nil {
t.Fatalf("failed to create new Instancer: %v", err)
}
defer instancer.Stop()
endpointer := sd.NewEndpointer(instancer, newFactory(""), logger)
if _, err := endpointer.Endpoints(); err != nil {
t.Fatal(err)
}
}
func TestBadFactory(t *testing.T) {
client := newFakeClient()
instancer, err := NewInstancer(client, path, logger)
if err != nil {
t.Fatalf("failed to create new Instancer: %v", err)
}
defer instancer.Stop()
endpointer := sd.NewEndpointer(instancer, newFactory("kaboom"), logger)
// instance1 came online
client.AddService(path+"/instance1", "kaboom")
// instance2 came online
client.AddService(path+"/instance2", "zookeeper_node_data")
if err = asyncTest(100*time.Millisecond, 1, endpointer); err != nil {
t.Error(err)
}
}
func TestServiceUpdate(t *testing.T) {
client := newFakeClient()
instancer, err := NewInstancer(client, path, logger)
if err != nil {
t.Fatalf("failed to create new Instancer: %v", err)
}
defer instancer.Stop()
endpointer := sd.NewEndpointer(instancer, newFactory(""), logger)
endpoints, err := endpointer.Endpoints()
if err != nil {
t.Fatal(err)
}
if want, have := 0, len(endpoints); want != have {
t.Errorf("want %d, have %d", want, have)
}
// instance1 came online
client.AddService(path+"/instance1", "zookeeper_node_data1")
// instance2 came online
client.AddService(path+"/instance2", "zookeeper_node_data2")
// we should have 2 instances
if err = asyncTest(100*time.Millisecond, 2, endpointer); err != nil {
t.Error(err)
}
// TODO(pb): this bit is flaky
//
//// watch triggers an error...
//client.SendErrorOnWatch()
//
//// test if error was consumed
//if err = client.ErrorIsConsumedWithin(100 * time.Millisecond); err != nil {
// t.Error(err)
//}
// instance3 came online
client.AddService(path+"/instance3", "zookeeper_node_data3")
// we should have 3 instances
if err = asyncTest(100*time.Millisecond, 3, endpointer); err != nil {
t.Error(err)
}
// instance1 goes offline
client.RemoveService(path + "/instance1")
// instance2 goes offline
client.RemoveService(path + "/instance2")
// we should have 1 instance
if err = asyncTest(100*time.Millisecond, 1, endpointer); err != nil {
t.Error(err)
}
}
func TestBadInstancerCreate(t *testing.T) {
client := newFakeClient()
client.SendErrorOnWatch()
instancer, err := NewInstancer(client, path, logger)
if err == nil {
t.Error("expected error on new Instancer")
}
if instancer != nil {
t.Error("expected Instancer not to be created")
}
instancer, err = NewInstancer(client, "BadPath", logger)
if err == nil {
t.Error("expected error on new Instancer")
}
if instancer != nil {
t.Error("expected Instancer not to be created")
}
}