Resell V2 - add subnets List method (#46)

Add List method with tests and doc example.
Also fix prefixes in testing fixtures.

selvpcclient/resell/v2/subnets/doc.go

@@ -9,5 +9,15 @@ Example of getting a single subnet referenced by its id
     log.Fatal(err)
   }
   fmt.Println(subnet)
+
+Example of getting all subnets
+
+  allSubnets, _, err := subnets.List(ctx, resellClient)
+  if err != nil {
+    log.Fatal(err)
+  }
+  for _, subnet := range allSubnet {
+    fmt.Println(subnet)
+  }
 */
 package subnets

selvpcclient/resell/v2/subnets/requests.go

@@ -31,3 +31,26 @@ func Get(ctx context.Context, client *selvpcclient.ServiceClient, id string) (*S
 
 	return result.Subnet, responseResult, nil
 }
+
+// List gets a list of subnets in the current domain.
+func List(ctx context.Context, client *selvpcclient.ServiceClient) ([]*Subnet, *selvpcclient.ResponseResult, error) {
+	url := strings.Join([]string{client.Endpoint, resourceURL}, "/")
+	responseResult, err := client.DoRequest(ctx, "GET", url, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+	if responseResult.Err != nil {
+		return nil, responseResult, responseResult.Err
+	}
+
+	// Extract subnets from the response body.
+	var result struct {
+		Subnets []*Subnet `json:"subnets"`
+	}
+	err = responseResult.ExtractResult(&result)
+	if err != nil {
+		return nil, responseResult, err
+	}
+
+	return result.Subnets, responseResult, nil
+}

selvpcclient/resell/v2/subnets/testing/fixtures.go

@@ -11,7 +11,7 @@ import (
 const TestGetSubnetResponseRaw = `
 {
     "subnet": {
-        "cidr": "203.0.113.11/24",
+        "cidr": "203.0.113.0/24",
         "id": 111122,
         "network_id": "8233f12e-c47e-4f1c-953a-1ecd322a7119",
         "project_id": "49338ac045f448e294b25d013f890317",
@@ -44,9 +44,57 @@ var TestGetSubnetResponse = &subnets.Subnet{
 			Updated: subnetServerTimeStamp,
 		},
 	},
-	CIDR:      "203.0.113.11/24",
+	CIDR:      "203.0.113.0/24",
 	NetworkID: "8233f12e-c47e-4f1c-953a-1ecd322a7119",
 	ProjectID: "49338ac045f448e294b25d013f890317",
 	Region:    "ru-3",
 	SubnetID:  "94425a6e-19cd-412d-9710-ff40b34a78f4",
 }
+
+// TestListSubnetsResponseRaw represents a raw response from the List request.
+const TestListSubnetsResponseRaw = `
+{
+    "subnets": [
+        {
+            "cidr": "203.0.113.0/24",
+            "id": 112233,
+            "project_id": "49338ac045f448e294b25d013f890317",
+            "region": "ru-3",
+            "status": "ACTIVE"
+        },
+        {
+            "cidr": "198.51.100.0/24",
+            "id": 112234,
+            "project_id": "9c97bdc75295493096cf5edcb8c37933",
+            "region": "ru-2",
+            "status": "ACTIVE"
+        }
+    ]
+}
+`
+
+// TestListSubnetsSingleResponseRaw represents a raw response with a single subnet from the List request.
+const TestListSubnetsSingleResponseRaw = `
+{
+    "subnets": [
+        {
+            "cidr": "203.0.113.0/24",
+            "id": 112233,
+            "project_id": "49338ac045f448e294b25d013f890317",
+            "region": "ru-3",
+            "status": "ACTIVE"
+        }
+    ]
+}
+`
+
+// TestListSubnetsSingleResponse represents the unmarshalled TestListSubnetsSingleResponseRaw response.
+var TestListSubnetsSingleResponse = []*subnets.Subnet{
+	{
+		CIDR:      "203.0.113.0/24",
+		ID:        112233,
+		ProjectID: "49338ac045f448e294b25d013f890317",
+		Region:    "ru-3",
+		Status:    "ACTIVE",
+	},
+}

selvpcclient/resell/v2/subnets/testing/request_test.go

@@ -36,3 +36,60 @@ func TestGetSubnet(t *testing.T) {
 		t.Fatalf("expected %#v, but got %#v", expected, actual)
 	}
 }
+
+func TestListSubnets(t *testing.T) {
+	testEnv := testutils.SetupTestEnv()
+	defer testEnv.TearDownTestEnv()
+	testEnv.NewTestResellV2Client()
+	testEnv.Mux.HandleFunc("/resell/v2/subnets", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Add("Content-Type", "application/json")
+		fmt.Fprintf(w, TestListSubnetsResponseRaw)
+
+		if r.Method != http.MethodGet {
+			t.Fatalf("expected %s method but got %s", http.MethodGet, r.Method)
+		}
+	})
+
+	ctx := context.Background()
+	actual, _, err := subnets.List(ctx, testEnv.Client)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if actual == nil {
+		t.Fatal("didn't get subnets")
+	}
+	actualKind := reflect.TypeOf(actual).Kind()
+	if actualKind != reflect.Slice {
+		t.Errorf("expected slice of pointers to subnets, but got %v", actualKind)
+	}
+	if len(actual) != 2 {
+		t.Errorf("expected 2 subnets, but got %d", len(actual))
+	}
+}
+
+func TestListSubnetsSingle(t *testing.T) {
+	testEnv := testutils.SetupTestEnv()
+	defer testEnv.TearDownTestEnv()
+	testEnv.NewTestResellV2Client()
+	testEnv.Mux.HandleFunc("/resell/v2/subnets", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Add("Content-Type", "application/json")
+		fmt.Fprintf(w, TestListSubnetsSingleResponseRaw)
+
+		if r.Method != http.MethodGet {
+			t.Fatalf("expected %s method but got %s", http.MethodGet, r.Method)
+		}
+	})
+
+	ctx := context.Background()
+	actual, _, err := subnets.List(ctx, testEnv.Client)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	expected := TestListSubnetsSingleResponse
+
+	if !reflect.DeepEqual(actual, expected) {
+		t.Fatalf("expected %#v, but got %#v", expected, actual)
+	}
+}