@@ -2,9 +2,22 @@ package docker

 import (

 	"net"

+	"os"

 	"testing"

 )

+func TestIptables(t *testing.T) {

+	if err := iptables("-L"); err != nil {

+		t.Fatal(err)

+	}

+	path := os.Getenv("PATH")

+	os.Setenv("PATH", "")

+	defer os.Setenv("PATH", path)

+	if err := iptables("-L"); err == nil {

+		t.Fatal("Not finding iptables in the PATH should cause an error")

+	}

+}

+

 func TestNetworkRange(t *testing.T) {

 	// Simple class C test

 	_, network, _ := net.ParseCIDR("192.168.0.1/24")