Moving extensions and API versions into different sub-packages; fixing test helper methods
diff --git a/openstack/networking/v2/extensions/requests_test.go b/openstack/networking/v2/extensions/requests_test.go
new file mode 100644
index 0000000..5ae7ec6
--- /dev/null
+++ b/openstack/networking/v2/extensions/requests_test.go
@@ -0,0 +1,60 @@
+package networks
+
+import (
+	"fmt"
+	"net/http"
+	"testing"
+
+	"github.com/rackspace/gophercloud"
+	th "github.com/rackspace/gophercloud/testhelper"
+)
+
+const TokenID = "123"
+
+func ServiceClient() *gophercloud.ServiceClient {
+	return &gophercloud.ServiceClient{
+		Provider: &gophercloud.ProviderClient{
+			TokenID: TokenID,
+		},
+		Endpoint: th.Endpoint(),
+	}
+}
+
+func TestList(t *testing.T) {
+
+}
+
+func TestGet(t *testing.T) {
+	th.SetupHTTP()
+	defer th.TeardownHTTP()
+
+	th.Mux.HandleFunc("/v2.0/extension/agent", func(w http.ResponseWriter, r *http.Request) {
+		th.TestMethod(t, r, "GET")
+		th.TestHeader(t, r, "X-Auth-Token", TokenID)
+
+		w.Header().Add("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+
+		fmt.Fprintf(w, `
+{
+    "extension": {
+        "updated": "2013-02-03T10:00:00-00:00",
+        "name": "agent",
+        "links": [],
+        "namespace": "http://docs.openstack.org/ext/agent/api/v2.0",
+        "alias": "agent",
+        "description": "The agent management extension."
+    }
+}
+		`)
+
+		ext, err := Get(ServiceClient(), "agent")
+		th.AssertNoErr(t, err)
+
+		th.AssertEquals(t, ext.Updated, "2013-02-03T10:00:00-00:00")
+		th.AssertEquals(t, ext.Name, "agent")
+		th.AssertEquals(t, ext.Namespace, "http://docs.openstack.org/ext/agent/api/v2.0")
+		th.AssertEquals(t, ext.Alias, "agent")
+		th.AssertEquals(t, ext.Description, "The agent management extension.")
+	})
+}