@@ -1,9 +1,11 @@

 package docker

 import (

+	"fmt"

 	"github.com/dotcloud/docker/rcli"

 	"io"

 	"io/ioutil"

+	"net"

 	"os"

 	"os/exec"

 	"os/user"

@@ -254,6 +256,47 @@ func TestGet(t *testing.T) {

 }

+// Run a container with a TCP port allocated, and test that it can receive connections on localhost

+func TestAllocatePortLocalhost(t *testing.T) {

+	runtime, err := newTestRuntime()

+	if err != nil {

+		t.Fatal(err)

+	}

+	container, err := runtime.Create(&Config{

+		Image:     GetTestImage(runtime).Id,

+		Cmd:       []string{"sh", "-c", "echo well hello there | nc -l -p 5555"},

+		PortSpecs: []string{"5555"},

+	},

+	)

+	if err != nil {

+		t.Fatal(err)

+	}

+	if err := container.Start(); err != nil {

+		t.Fatal(err)

+	}

+	defer container.Kill()

+	time.Sleep(300 * time.Millisecond) // Wait for the container to run

+	conn, err := net.Dial("tcp",

+		fmt.Sprintf(

+			"localhost:%s", container.NetworkSettings.PortMapping["5555"],

+		),

+	)

+	if err != nil {

+		t.Fatal(err)

+	}

+	defer conn.Close()

+	output, err := ioutil.ReadAll(conn)

+	if err != nil {

+		t.Fatal(err)

+	}

+	if string(output) != "well hello there\n" {

+		t.Fatalf("Received wrong output from network connection: should be '%s', not '%s'",

+			"well hello there\n",

+			string(output),

+		)

+	}

+}

+

 func TestRestore(t *testing.T) {

 	root, err := ioutil.TempDir("", "docker-test")