Fix breaking change in LUIS Apis and unit tests (#4563)

Author: emadelwany

CSharp/Library/Microsoft.Bot.Builder/Dialogs/LuisDialog.cs

@@ -119,7 +119,7 @@ private InvalidIntentHandlerException(SerializationInfo info, StreamingContext c
     /// </summary>
     public class LuisServiceResult
     {
-        public LuisServiceResult(LuisResult result, IntentRecommendation intent, ILuisService service, ILuisOptions luisRequest)
+        public LuisServiceResult(LuisResult result, IntentRecommendation intent, ILuisService service, ILuisOptions luisRequest = null)
         {
             this.Result = result;
             this.BestIntent = intent;
@@ -145,6 +145,7 @@ public class LuisDialog<TResult> : IDialog<TResult>
     {
         public const string LuisTraceType = "https://www.luis.ai/schemas/trace";
         public const string LuisTraceLabel = "Luis Trace";
+        public const string LuisTraceName = "LuisDialog";
         public const string Obfuscated = "****";
 
         protected readonly IReadOnlyList<ILuisService> services;
@@ -327,12 +328,16 @@ private static async Task EmitTraceInfo(IBotContext context, LuisResult luisResu
                 LuisOptions = luisOptions,
                 LuisModel = RemoveSensitiveData(luisModel)
             };
-            var activity = Activity.CreateTraceActivityReply(context.Activity as Activity, "LuisDialog", LuisTraceType, luisTraceInfo, LuisTraceLabel) as IMessageActivity;
+            var activity = Activity.CreateTraceActivityReply(context.Activity as Activity, LuisTraceName, LuisTraceType, luisTraceInfo, LuisTraceLabel) as IMessageActivity;
             await context.PostAsync(activity).ConfigureAwait(false);
         }
 
         public static ILuisModel RemoveSensitiveData(ILuisModel luisModel)
         {
+            if (luisModel == null)
+            {
+                return null;
+            }
             return new LuisModelAttribute(luisModel.ModelID, Obfuscated,luisModel.ApiVersion, luisModel.UriBase.Host, luisModel.Threshold);
         }
 

CSharp/Tests/Microsoft.Bot.Builder.Tests/DialogTestBase.cs

@@ -172,24 +172,26 @@ public static async Task AssertScriptAsync(ILifetimeScope container, params stri
 
                 while (queue.Count > 0)
                 {
-                    ++index;
-
                     var toUser = queue.Dequeue();
-                    string actual;
                     switch (toUser.Type)
                     {
                         case ActivityTypes.Message:
-                            actual = toUser.Text;
+                            Assert.AreEqual(pairs[++index], toUser.Text);
                             break;
                         case ActivityTypes.EndOfConversation:
-                            actual = toUser.AsEndOfConversationActivity().Code;
+                            Assert.AreEqual(pairs[++index], toUser.AsEndOfConversationActivity().Code);
+                            break;
+                        case ActivityTypes.Trace:
+                            var trace  = toUser.AsTraceActivity();
+                            Assert.IsNotNull(trace.Value);
+                            Assert.AreEqual(LuisDialog<object>.LuisTraceLabel, trace.Label);
+                            Assert.AreEqual(LuisDialog<object>.LuisTraceType, trace.ValueType);
+                            Assert.AreEqual(LuisDialog<object>.LuisTraceName, trace.Name);
                             break;
                         default:
                             throw new NotImplementedException();
                     }
-                    var expected = pairs[index];
-
-                    Assert.AreEqual(expected, actual);
+                    
                 }
             }
         }

CSharp/Tests/Microsoft.Bot.Builder.Tests/LuisTests.cs

@@ -360,11 +360,16 @@ public async Task Service_With_LuisActionDialog()
             var intent = "IntentOne";
             var prompt = "ParamOne?";
             var action = "IntentOneAction";
+            var model = new LuisModelAttribute("model", "subs", LuisApiVersion.V2);
+
+            service
+                .Setup(l => l.LuisModel)
+                .Returns(model);
 
             service
                 .Setup(l => l.BuildUri(It.IsAny<LuisRequest>()))
                 .Returns<LuisRequest>(request =>
-                        request.BuildUri(new LuisModelAttribute("model", "subs", LuisApiVersion.V2))
+                        request.BuildUri(model)
                 );
 
             service