Made changes in TranscriptionData for StreamingData Parse and addede test scenario. (Azure#49030)

Author: v-pivamshi

sdk/communication/Azure.Communication.CallAutomation/src/Models/Streaming/Transcription/TranscriptionData.cs

@@ -19,7 +19,8 @@ internal TranscriptionData(string text, string format, double confidence, long o
             Confidence = confidence;
             Offset = TimeSpan.FromTicks(offset);
             Duration = TimeSpan.FromTicks(duration);
-            Words = ConvertToWordData(words);
+            if (words != null)
+                Words = ConvertToWordData(words);
             if (participantRawID != null)
             {
                 Participant = CommunicationIdentifier.FromRawId(participantRawID);

sdk/communication/Azure.Communication.CallAutomation/tests/Streaming/StreamingDataParserTests.cs

@@ -131,6 +131,22 @@ public void ParseTranscriptionData_Test()
             ValidateTranscriptionData(transcription);
         }
 
+        [Test]
+        public void ParseTranscriptionDataWithWordsNull_Test()
+        {
+            var data = "{" +
+                "\"kind\":\"TranscriptionData\"," +
+                "\"transcriptionData\":" +
+                "{\"text\":\"store hours\"," +
+                "\"format\":\"display\"," +
+                "\"offset\":49876484," +
+                "\"duration\":9200000," +
+                "\"participantRawID\":\"abc12345\"," +
+                "\"resultStatus\":\"Intermediate\"}}";
+            TranscriptionData transcription = (TranscriptionData)StreamingData.Parse(data);
+            ValidateTranscriptionDataWithWordsNull(transcription);
+        }
+
         private static void ValidateTranscriptionMetadata(TranscriptionMetadata transcriptionMetadata)
         {
             Assert.IsNotNull(transcriptionMetadata);
@@ -140,6 +156,20 @@ private static void ValidateTranscriptionMetadata(TranscriptionMetadata transcri
             Assert.AreEqual("correlationId", transcriptionMetadata.CorrelationId);
         }
 
+        private static void ValidateTranscriptionDataWithWordsNull(TranscriptionData transcription)
+        {
+            Assert.IsNotNull(transcription);
+            Assert.AreEqual("store hours", transcription.Text);
+            Assert.AreEqual(TextFormat.Display, transcription.Format);
+            Assert.AreEqual(49876484, transcription.Offset.Ticks);
+            Assert.AreEqual(9200000, transcription.Duration.Ticks);
+
+            Assert.IsTrue(transcription.Participant is CommunicationIdentifier);
+            Assert.AreEqual("abc12345", transcription.Participant.RawId);
+            Console.WriteLine(transcription.ResultState.ToString());
+            Assert.AreEqual(TranscriptionResultState.Intermediate, transcription.ResultState);
+        }
+
         private static void ValidateTranscriptionData(TranscriptionData transcription)
         {
             Assert.IsNotNull(transcription);