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package proxy
import (
"net/http"
"net/http/httptest"
"os"
"testing"
)
var workableServer *httptest.Server
func TestMain(m *testing.M) {
workableServer = httptest.NewServer(http.HandlerFunc(
func(w http.ResponseWriter, r *http.Request) {
// do nothing
}))
r := m.Run()
workableServer.Close()
os.Exit(r)
}
type customPolicy struct{}
func (r *customPolicy) Select(pool HostPool) *UpstreamHost {
return pool[0]
}
func testPool() HostPool {
pool := []*UpstreamHost{
{
Name: workableServer.URL, // this should resolve (healthcheck test)
},
{
Name: "http://shouldnot.resolve", // this shouldn't
},
{
Name: "http://C",
},
}
return HostPool(pool)
}
func TestRoundRobinPolicy(t *testing.T) {
pool := testPool()
rrPolicy := &RoundRobin{}
h := rrPolicy.Select(pool)
// First selected host is 1, because counter starts at 0
// and increments before host is selected
if h != pool[1] {
t.Error("Expected first round robin host to be second host in the pool.")
}
h = rrPolicy.Select(pool)
if h != pool[2] {
t.Error("Expected second round robin host to be third host in the pool.")
}
// mark host as down
pool[0].Unhealthy = true
h = rrPolicy.Select(pool)
if h != pool[1] {
t.Error("Expected third round robin host to be first host in the pool.")
}
}
func TestLeastConnPolicy(t *testing.T) {
pool := testPool()
lcPolicy := &LeastConn{}
pool[0].Conns = 10
pool[1].Conns = 10
h := lcPolicy.Select(pool)
if h != pool[2] {
t.Error("Expected least connection host to be third host.")
}
pool[2].Conns = 100
h = lcPolicy.Select(pool)
if h != pool[0] && h != pool[1] {
t.Error("Expected least connection host to be first or second host.")
}
}
func TestCustomPolicy(t *testing.T) {
pool := testPool()
customPolicy := &customPolicy{}
h := customPolicy.Select(pool)
if h != pool[0] {
t.Error("Expected custom policy host to be the first host.")
}
}
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