Fixed InternalServiceError Error message on continue_as_new (#259)

Author: mfateev

src/main/java/com/uber/cadence/internal/testservice/TestWorkflowMutableState.java

@@ -96,7 +96,8 @@ void childWorkflowCompleted(String workflowId, ChildWorkflowExecutionCompletedEv
   void childWorkflowCanceled(String workflowId, ChildWorkflowExecutionCanceledEventAttributes a)
       throws InternalServiceError, EntityNotExistsError, BadRequestError;
 
-  void startWorkflow(Optional<SignalWorkflowExecutionRequest> signalWithStartSignal)
+  void startWorkflow(
+      boolean continuedAsNew, Optional<SignalWorkflowExecutionRequest> signalWithStartSignal)
       throws InternalServiceError, BadRequestError;
 
   void startActivityTask(PollForActivityTaskResponse task, PollForActivityTaskRequest pollRequest)

src/main/java/com/uber/cadence/internal/testservice/TestWorkflowMutableStateImpl.java

@@ -959,7 +959,8 @@ private void processContinueAsNewWorkflowExecution(
   }
 
   @Override
-  public void startWorkflow(Optional<SignalWorkflowExecutionRequest> signalWithStartSignal)
+  public void startWorkflow(
+      boolean continuedAsNew, Optional<SignalWorkflowExecutionRequest> signalWithStartSignal)
       throws InternalServiceError, BadRequestError {
     try {
       update(
@@ -998,7 +999,7 @@ public void startWorkflow(Optional<SignalWorkflowExecutionRequest> signalWithSta
     } catch (EntityNotExistsError entityNotExistsError) {
       throw new InternalServiceError(Throwables.getStackTraceAsString(entityNotExistsError));
     }
-    if (parent.isPresent()) {
+    if (!continuedAsNew && parent.isPresent()) {
       ChildWorkflowExecutionStartedEventAttributes a =
           new ChildWorkflowExecutionStartedEventAttributes()
               .setInitiatedEventId(parentChildInitiatedEventId.getAsLong())

src/main/java/com/uber/cadence/internal/testservice/TestWorkflowService.java

@@ -238,6 +238,7 @@ StartWorkflowExecutionResponse startWorkflowExecutionImpl(
       Optional<RetryState> retryState = newRetryStateLocked(retryPolicy);
       return startWorkflowExecutionNoRunningCheckLocked(
           startRequest,
+          false,
           retryState,
           backoffStartIntervalInSeconds,
           null,
@@ -275,6 +276,7 @@ private StartWorkflowExecutionResponse throwDuplicatedWorkflow(
 
   private StartWorkflowExecutionResponse startWorkflowExecutionNoRunningCheckLocked(
       StartWorkflowExecutionRequest startRequest,
+      boolean continuedAsNew,
       Optional<RetryState> retryState,
       int backoffStartIntervalInSeconds,
       byte[] lastCompletionResult,
@@ -298,7 +300,7 @@ private StartWorkflowExecutionResponse startWorkflowExecutionNoRunningCheckLocke
     ExecutionId executionId = new ExecutionId(domain, execution);
     executionsByWorkflowId.put(workflowId, mutableState);
     executions.put(executionId, mutableState);
-    mutableState.startWorkflow(signalWithStartSignal);
+    mutableState.startWorkflow(continuedAsNew, signalWithStartSignal);
     return new StartWorkflowExecutionResponse().setRunId(execution.getRunId());
   }
 
@@ -592,6 +594,7 @@ public String continueAsNew(
       StartWorkflowExecutionResponse response =
           startWorkflowExecutionNoRunningCheckLocked(
               startRequest,
+              true,
               retryState,
               a.getBackoffStartIntervalInSeconds(),
               a.getLastCompletionResult(),