Add methods to easily do HTTP POST requests

plugins/webapi/getMessageByHash/plugin.go

@@ -48,7 +48,6 @@ func getMessageByHash(c echo.Context) error {
 		}
 
 		msg := msgObject.Unwrap()
-		msgObject.Release()
 		msgResp := Message{
 			MessageId:           msg.Id().String(),
 			TrunkTransactionId:  msg.TrunkId().String(),
@@ -60,6 +59,7 @@ func getMessageByHash(c echo.Context) error {
 			Signature:           msg.Signature().String(),
 		}
 		result = append(result, msgResp)
+		msgObject.Release()
 	}
 
 	return c.JSON(http.StatusOK, Response{Messages: result})

tools/integration-tests/tester/framework/framework.go

@@ -2,6 +2,7 @@ package framework
 
 import (
 	"fmt"
+	"math/rand"
 	"net/http"
 	"time"
 )
@@ -71,6 +72,15 @@ func (f *Framework) HttpGet(peer *Peer, endpoint string, target interface{}) err
 	return getJson(f.httpClient, url, target)
 }
 
+func (f *Framework) HttpPost(peer *Peer, endpoint string, requestBody interface{}, responseBody interface{}) error {
+	url := fmt.Sprintf("%s%s", peer.api, endpoint)
+	return postJson(f.httpClient, url, requestBody, responseBody)
+}
+
 func (f *Framework) Peers() []*Peer {
 	return f.peers
 }
+
+func (f *Framework) RandomPeer() *Peer {
+	return f.peers[rand.Intn(len(f.peers))]
+}

tools/integration-tests/tester/framework/util.go

 package framework
 
 import (
+	"bytes"
 	"encoding/json"
 	"net/http"
 )
 
-func getJson(client *http.Client, url string, target interface{}) error {
+func getJson(client *http.Client, url string, responseBody interface{}) error {
 	r, err := client.Get(url)
 	if err != nil {
 		return err
 	}
 	defer r.Body.Close()
 
-	return json.NewDecoder(r.Body).Decode(target)
+	return json.NewDecoder(r.Body).Decode(responseBody)
+}
+
+func postJson(client *http.Client, url string, requestBody interface{}, responseBody interface{}) error {
+	buf := new(bytes.Buffer)
+	err := json.NewEncoder(buf).Encode(requestBody)
+	if err != nil {
+		return err
+	}
+
+	response, err := client.Post(url, "application/json", buf)
+	if err != nil {
+		return err
+	}
+	defer response.Body.Close()
+
+	return json.NewDecoder(response.Body).Decode(responseBody)
 }