Added mapstructure tags for HostRoute parsing

mapstructure tags are to HostRoute so DestinationCIDR is correctly
mapped

Author: Keith Byrne

openstack/networking/v2/subnets/results.go

@@ -55,8 +55,8 @@ type AllocationPool struct {
 // HostRoute represents a route that should be used by devices with IPs from
 // a subnet (not including local subnet route).
 type HostRoute struct {
-	DestinationCIDR string `json:"destination"`
-	NextHop         string `json:"nexthop"`
+	DestinationCIDR string `mapstructure:"destination" json:"destination"`
+	NextHop         string `mapstructure:"nexthop" json:"nexthop"`
 }
 
 // Subnet represents a subnet. See package documentation for a top-level

openstack/networking/v2/subnets/results_test.go

@@ -0,0 +1,54 @@
+package subnets
+
+import (
+	"encoding/json"
+	"github.com/rackspace/gophercloud"
+	th "github.com/rackspace/gophercloud/testhelper"
+	"testing"
+)
+
+func TestHostRoute(t *testing.T) {
+	sejson := []byte(`
+    {"subnet": {
+      "name": "test-subnet",
+      "enable_dhcp": false,
+      "network_id": "3e66c41e-cbbd-4019-9aab-740b7e4150a0",
+      "tenant_id": "f86e123198cf42d19c8854c5f80c2f06",
+      "dns_nameservers": [],
+      "gateway_ip": "172.16.0.1",
+      "ipv6_ra_mode": null,
+      "allocation_pools": [
+        {
+          "start": "172.16.0.2",
+          "end": "172.16.255.254"
+        }
+      ],
+      "host_routes": [
+        {
+          "destination": "172.20.1.0/24",
+		  "nexthop": "172.16.0.2"
+        }
+      ],
+      "ip_version": 4,
+      "ipv6_address_mode": null,
+      "cidr": "172.16.0.0/16",
+      "id": "6dcaa873-7115-41af-9ef5-915f73636e43",
+      "subnetpool_id": null
+  }}
+`)
+
+	var dejson interface{}
+	err := json.Unmarshal(sejson, &dejson)
+	if err != nil {
+		t.Fatalf("%s", err)
+	}
+
+	resp := commonResult{gophercloud.Result{Body: dejson}}
+	subnet, err := resp.Extract()
+	if err != nil {
+		t.Fatalf("%s", err)
+	}
+	route := subnet.HostRoutes[0]
+	th.AssertEquals(t, route.NextHop, "172.16.0.2")
+	th.AssertEquals(t, route.DestinationCIDR, "172.20.1.0/24")
+}