Also handling the case where no commands get queued in a transaction

Author: Alexandre Curreli

src/main/scala/scredis/protocol/requests/TransactionRequests.scala

@@ -23,7 +23,7 @@ object TransactionRequests {
     decoders: Seq[Decoder[Any]]
   ) extends Request[Vector[Try[Any]]](Exec) {
     override def decode = {
-      case a: ArrayResponse => if (a.length > 0) {
+      case a: ArrayResponse => if (a.length >= 0) {
         a.parsed[Vector](decoders)
       } else {
         throw RedisTransactionAbortedException

src/test/scala/scredis/commands/TransactionCommandsSpec.scala

@@ -54,6 +54,11 @@ class TransactionCommandsSpec extends WordSpec
   }
 
   "inTransaction" when {
+    "no commands are queued" should {
+      "succeed" taggedAs (V120) in {
+        client.inTransaction(_ => ()).futureValue should be (empty)
+      }
+    }
     "all commands are valid" should {
       "succeed" taggedAs (V120) in {
         client.set("STR", SomeValue)
@@ -108,6 +113,11 @@ class TransactionCommandsSpec extends WordSpec
   }
 
   "withTransaction" when {
+    "no commands are queued" should {
+      "succeed" taggedAs (V120) in {
+        client.withTransaction(_ => ()) should be (())
+      }
+    }
     "all commands are valid" should {
       "succeed" taggedAs (V120) in {
         client.set("STR", SomeValue)