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package snowflake_client
import (
"fmt"
"net"
"testing"
"time"
. "github.com/smartystreets/goconvey/convey"
"gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/v2/common/event"
)
type FakeDialer struct {
max int
}
func (w FakeDialer) Catch() (*WebRTCPeer, error) {
fmt.Println("Caught a dummy snowflake.")
return &WebRTCPeer{closed: make(chan struct{})}, nil
}
func (w FakeDialer) GetMax() int {
return w.max
}
type FakeSocksConn struct {
net.Conn
rejected bool
}
func (f FakeSocksConn) Reject() error {
f.rejected = true
return nil
}
func (f FakeSocksConn) Grant(addr *net.TCPAddr) error { return nil }
func TestSnowflakeClient(t *testing.T) {
Convey("Peers", t, func() {
Convey("Can construct", func() {
d := &FakeDialer{max: 1}
p, _ := NewPeers(d)
So(p.Tongue.GetMax(), ShouldEqual, 1)
So(p.snowflakeChan, ShouldNotBeNil)
So(cap(p.snowflakeChan), ShouldEqual, 1)
})
Convey("Collecting a Snowflake requires a Tongue.", func() {
p, err := NewPeers(nil)
So(err, ShouldNotBeNil)
// Set the dialer so that collection is possible.
d := &FakeDialer{max: 1}
p, err = NewPeers(d)
_, err = p.Collect()
So(err, ShouldBeNil)
So(p.Count(), ShouldEqual, 1)
// S
_, err = p.Collect()
})
Convey("Collection continues until capacity.", func() {
c := 5
p, _ := NewPeers(FakeDialer{max: c})
// Fill up to capacity.
for i := 0; i < c; i++ {
fmt.Println("Adding snowflake ", i)
_, err := p.Collect()
So(err, ShouldBeNil)
So(p.Count(), ShouldEqual, i+1)
}
// But adding another gives an error.
So(p.Count(), ShouldEqual, c)
_, err := p.Collect()
So(err, ShouldNotBeNil)
So(p.Count(), ShouldEqual, c)
// But popping allows it to continue.
s := p.Pop()
s.Close()
So(s, ShouldNotBeNil)
So(p.Count(), ShouldEqual, c-1)
_, err = p.Collect()
So(err, ShouldBeNil)
So(p.Count(), ShouldEqual, c)
})
Convey("Count correctly purges peers marked for deletion.", func() {
p, _ := NewPeers(FakeDialer{max: 5})
p.Collect()
p.Collect()
p.Collect()
p.Collect()
So(p.Count(), ShouldEqual, 4)
s := p.Pop()
s.Close()
So(p.Count(), ShouldEqual, 3)
s = p.Pop()
s.Close()
So(p.Count(), ShouldEqual, 2)
})
Convey("End Closes all peers.", func() {
cnt := 5
p, _ := NewPeers(FakeDialer{max: cnt})
for i := 0; i < cnt; i++ {
p.activePeers.PushBack(&WebRTCPeer{closed: make(chan struct{})})
}
So(p.Count(), ShouldEqual, cnt)
p.End()
<-p.Melted()
So(p.Count(), ShouldEqual, 0)
})
Convey("Pop skips over closed peers.", func() {
p, _ := NewPeers(FakeDialer{max: 4})
wc1, _ := p.Collect()
wc2, _ := p.Collect()
wc3, _ := p.Collect()
So(wc1, ShouldNotBeNil)
So(wc2, ShouldNotBeNil)
So(wc3, ShouldNotBeNil)
wc1.Close()
r := p.Pop()
So(p.Count(), ShouldEqual, 2)
So(r, ShouldEqual, wc2)
wc4, _ := p.Collect()
wc2.Close()
wc3.Close()
r = p.Pop()
So(r, ShouldEqual, wc4)
})
Convey("Terminate Connect() loop", func() {
p, _ := NewPeers(FakeDialer{max: 4})
go func() {
for {
p.Collect()
select {
case <-p.Melted():
return
default:
}
}
}()
<-time.After(10 * time.Second)
p.End()
<-p.Melted()
So(p.Count(), ShouldEqual, 0)
})
})
Convey("Dialers", t, func() {
Convey("Can construct WebRTCDialer.", func() {
broker := &BrokerChannel{}
d := NewWebRTCDialer(broker, nil, 1)
So(d, ShouldNotBeNil)
So(d.BrokerChannel, ShouldNotBeNil)
})
SkipConvey("WebRTCDialer can Catch a snowflake.", func() {
broker := &BrokerChannel{}
d := NewWebRTCDialer(broker, nil, 1)
conn, err := d.Catch()
So(conn, ShouldBeNil)
So(err, ShouldNotBeNil)
})
})
}
func TestWebRTCPeer(t *testing.T) {
Convey("WebRTCPeer", t, func(c C) {
p := &WebRTCPeer{closed: make(chan struct{}),
eventsLogger: event.NewSnowflakeEventDispatcher()}
Convey("checks for staleness", func() {
go p.checkForStaleness(time.Second)
<-time.After(2 * time.Second)
So(p.Closed(), ShouldEqual, true)
})
})
}
func TestICEServerParser(t *testing.T) {
Convey("Test parsing of ICE servers", t, func() {
for _, test := range []struct {
input []string
urls [][]string
length int
}{
{
[]string{"stun:stun.l.google.com:19302", "stun:stun.ekiga.net:3478"},
[][]string{[]string{"stun:stun.l.google.com:19302"}, []string{"stun:stun.ekiga.net:3478"}},
2,
},
{
[]string{"stun:stun1.l.google.com:19302", "stun.ekiga.net", "stun:stun.example.com:1234/path?query",
"https://example.com", "turn:relay.metered.ca:80?transport=udp"},
[][]string{[]string{"stun:stun1.l.google.com:19302"}},
1,
},
} {
servers := parseIceServers(test.input)
if test.urls == nil {
So(servers, ShouldBeNil)
} else {
So(servers, ShouldNotBeNil)
}
So(len(servers), ShouldEqual, test.length)
for _, server := range servers {
So(len(server.URLs), ShouldEqual, 1)
So(test.input, ShouldContain, server.URLs[0])
}
}
})
}
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