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package forward
import (
"testing"
"time"
"github.com/coredns/coredns/plugin/pkg/dnstest"
"github.com/miekg/dns"
)
func TestCached(t *testing.T) {
s := dnstest.NewServer(func(w dns.ResponseWriter, r *dns.Msg) {
ret := new(dns.Msg)
ret.SetReply(r)
w.WriteMsg(ret)
})
defer s.Close()
tr := newTransport(s.Addr)
tr.Start()
defer tr.Stop()
c1, cache1, _ := tr.Dial("udp")
c2, cache2, _ := tr.Dial("udp")
if cache1 || cache2 {
t.Errorf("Expected non-cached connection")
}
tr.Yield(c1)
tr.Yield(c2)
c3, cached3, _ := tr.Dial("udp")
if !cached3 {
t.Error("Expected cached connection (c3)")
}
if c2 != c3 {
t.Error("Expected c2 == c3")
}
tr.Yield(c3)
// dial another protocol
c4, cached4, _ := tr.Dial("tcp")
if cached4 {
t.Errorf("Expected non-cached connection (c4)")
}
tr.Yield(c4)
}
func TestCleanupByTimer(t *testing.T) {
s := dnstest.NewServer(func(w dns.ResponseWriter, r *dns.Msg) {
ret := new(dns.Msg)
ret.SetReply(r)
w.WriteMsg(ret)
})
defer s.Close()
tr := newTransport(s.Addr)
tr.SetExpire(100 * time.Millisecond)
tr.Start()
defer tr.Stop()
c1, _, _ := tr.Dial("udp")
c2, _, _ := tr.Dial("udp")
tr.Yield(c1)
time.Sleep(10 * time.Millisecond)
tr.Yield(c2)
time.Sleep(120 * time.Millisecond)
c3, cached, _ := tr.Dial("udp")
if cached {
t.Error("Expected non-cached connection (c3)")
}
tr.Yield(c3)
time.Sleep(120 * time.Millisecond)
c4, cached, _ := tr.Dial("udp")
if cached {
t.Error("Expected non-cached connection (c4)")
}
tr.Yield(c4)
}
func TestPartialCleanup(t *testing.T) {
s := dnstest.NewServer(func(w dns.ResponseWriter, r *dns.Msg) {
ret := new(dns.Msg)
ret.SetReply(r)
w.WriteMsg(ret)
})
defer s.Close()
tr := newTransport(s.Addr)
tr.SetExpire(100 * time.Millisecond)
tr.Start()
defer tr.Stop()
c1, _, _ := tr.Dial("udp")
c2, _, _ := tr.Dial("udp")
c3, _, _ := tr.Dial("udp")
c4, _, _ := tr.Dial("udp")
c5, _, _ := tr.Dial("udp")
tr.Yield(c1)
time.Sleep(10 * time.Millisecond)
tr.Yield(c2)
time.Sleep(10 * time.Millisecond)
tr.Yield(c3)
time.Sleep(50 * time.Millisecond)
tr.Yield(c4)
time.Sleep(10 * time.Millisecond)
tr.Yield(c5)
time.Sleep(40 * time.Millisecond)
c6, _, _ := tr.Dial("udp")
if c6 != c5 {
t.Errorf("Expected c6 == c5")
}
c7, _, _ := tr.Dial("udp")
if c7 != c4 {
t.Errorf("Expected c7 == c4")
}
c8, cached, _ := tr.Dial("udp")
if cached {
t.Error("Expected non-cached connection (c8)")
}
tr.Yield(c6)
tr.Yield(c7)
tr.Yield(c8)
}
func TestCleanupAll(t *testing.T) {
s := dnstest.NewServer(func(w dns.ResponseWriter, r *dns.Msg) {
ret := new(dns.Msg)
ret.SetReply(r)
w.WriteMsg(ret)
})
defer s.Close()
tr := newTransport(s.Addr)
c1, _ := dns.DialTimeout("udp", tr.addr, defaultDialTimeout)
c2, _ := dns.DialTimeout("udp", tr.addr, defaultDialTimeout)
c3, _ := dns.DialTimeout("udp", tr.addr, defaultDialTimeout)
tr.conns["udp"] = []*persistConn{
{c1, time.Now()},
{c2, time.Now()},
{c3, time.Now()},
}
if tr.len() != 3 {
t.Error("Expected 3 connections")
}
tr.cleanup(true)
if tr.len() > 0 {
t.Error("Expected no cached connections")
}
}
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