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localtunnel_test.go
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localtunnel_test.go
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package localtunnel
import (
"fmt"
"io/ioutil"
"net"
"net/http"
"net/http/httptest"
"net/url"
"regexp"
"strconv"
"testing"
)
var ltRegexp = regexp.MustCompile("^https:\\/\\/.*\\.loca.lt$")
func TestDefaultClient(t *testing.T) {
if DefaultClient == nil {
t.Fatal("DefaultClient can not be null")
}
if DefaultClient.endPoint != "https://localtunnel.me" {
t.Fatalf("Unexpected default remote host: %s", DefaultClient.endPoint)
}
}
func TestSetupLocalTunnel(t *testing.T) {
content := "Hello from local server!"
s := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(200)
fmt.Fprint(w, content)
}))
localPort := getServerPort(t, s)
tunnel := NewLocalTunnel(localPort)
checkTunnelIsNotConnected(t, tunnel, localPort)
err := tunnel.Open()
if err != nil {
t.Fatalf("Cannot open tunnel: %s", err)
}
checkTunnelIsConnected(t, tunnel, localPort)
for i := 0; i <= tunnel.MaxConn()*2; i++ {
response, err := readFromURL(tunnel.URL())
if err != nil {
t.Fatalf("Cannot connect through the tunnel: %s", err)
}
if response != content {
t.Fatalf("Unexpected response. Expected: '%s'. Actual: '%s'", content, response)
}
}
tunnel.Close()
<-tunnel.Closing()
checkTunnelIsNotConnected(t, tunnel, localPort)
}
func checkTunnelIsNotConnected(t *testing.T, tunnel *Tunnel, localPort int) {
if tunnel.RemoteHost() != "" {
t.Fatalf("Remote host should be empty: %s", tunnel.RemoteHost())
}
if tunnel.RemotePort() != 0 {
t.Fatalf("Remote port should be zero. Actual: %d", tunnel.RemotePort())
}
if tunnel.LocalHost() != "localhost" {
t.Fatalf("Local host should be localhost. Actual: %s", tunnel.LocalHost())
}
if tunnel.LocalPort() != localPort {
t.Fatalf("Unexpected local port. Expected: %d, Actual: %d", localPort, tunnel.LocalPort())
}
if tunnel.Subdomain() != "" {
t.Fatalf("Subdomain should be empty. Actual: %s", tunnel.Subdomain())
}
if tunnel.URL() != "" {
t.Fatalf("URL should be empty. Actual: %s", tunnel.URL())
}
if tunnel.MaxConn() != 0 {
t.Fatalf("Max connections should be zero. Actual: %d", tunnel.MaxConn())
}
}
func checkTunnelIsConnected(t *testing.T, tunnel *Tunnel, localPort int) {
if tunnel.RemoteHost() == "" {
t.Fatalf("Remote host should not be empty: %s", tunnel.RemoteHost())
}
if tunnel.RemotePort() <= 0 {
t.Fatalf("Remote port should be greater than zero. Actual: %d", tunnel.RemotePort())
}
if tunnel.LocalHost() != "localhost" {
t.Fatalf("Local host should be localhost. Actual: %s", tunnel.LocalHost())
}
if tunnel.LocalPort() != localPort {
t.Fatalf("Unexpected local port. Expected: %d, Actual: %d", localPort, tunnel.LocalPort())
}
if tunnel.Subdomain() == "" {
t.Fatalf("Subdomain should not be empty. Actual: %s", tunnel.Subdomain())
}
if tunnel.URL() == "" {
t.Fatalf("URL should not be empty. Actual: %s", tunnel.URL())
}
if !ltRegexp.MatchString(tunnel.URL()) {
t.Fatalf("URL should match '%s'. Actual: %s", ltRegexp, tunnel.URL())
}
if tunnel.MaxConn() <= 0 {
t.Fatalf("Max connections should be greater than zero. Actual: %d", tunnel.MaxConn())
}
}
func readFromURL(url string) (string, error) {
resp, err := http.Get(url)
if err != nil {
return "", err
}
defer resp.Body.Close()
bytes, err := ioutil.ReadAll(resp.Body)
if err != nil {
return "", err
}
return string(bytes), nil
}
func getServerPort(t *testing.T, s *httptest.Server) int {
url, e := url.Parse(s.URL)
if e != nil {
t.Fatal(e)
}
_, portStr, e := net.SplitHostPort(url.Host)
if e != nil {
t.Fatal(e)
}
port, err := strconv.Atoi(portStr)
if err != nil {
t.Fatal(e)
}
if port <= 0 {
t.Fatalf("Local port should be greater than zero. Actual: %d", port)
}
return port
}