Need help in using Ioslator, getting null reference error

Welcome Raju,

How do you pass the fake into the code under test.
Is it an argument? or a future object?

Hi,
fake is a future object. Its not passed as an argument.

UDM.Interaction.PrimaryMember.PrimaryRelationships is the actual code in the project which am trying to access by creating fake objects in our Test project, but when the actual code "UDM.Interaction.PrimaryMember.PrimaryRelationships" is called, it fails for the null reference error shown below, though the fake object is created like >> Isolate.WhenCalled(() => fakeprimaryM.PrimaryRelationships).WillReturn(primaryRe);

Thanks,
Siva

I understand,
I think that the problem is in setting the future object.
Do you have this line?

Isolate.Swap.AllInstances<PrimaryMember>().With(fakeprimaryM);

Have below statements:

CXM.BECU.DataModel.PrimaryMemberClass fakeprimaryM = Isolate.Fake.Instance<CXM.BECU.DataModel.PrimaryMemberClass>();
Isolate.Swap.NextInstance<CXM.BECU.DataModel.PrimaryMemberClass>().With(fakeprimaryM);

CXM.BECU.DataModel.PrimaryRelationshipClass fakeprimaryR = Isolate.Fake.Instance<CXM.BECU.DataModel.PrimaryRelationshipClass>();
Isolate.Swap.NextInstance<CXM.BECU.DataModel.PrimaryRelationshipClass>().With(fakeprimaryR);


wont this serve the purpose ? You want me to try it with the one you posted ?

Tried with AllInstances too, but same result.. runtime exception for nullreference for primaryrelationship object in actual app code.. i doubt for some reason, the fake objects are not replacing the actual app objects..

What method is failing? can you post the code.

please post complete stack trace.
What is in TNMapRelationshipInfo.cs: line 27

Complete trace :




'vstesthost.exe' (Managed): Loaded 'C:WINDOWSssemblyGAC_32mscorlib.0.0.0__b77a5c561934e089mscorlib.dll'
'vstesthost.exe' (Managed): Loaded 'C:Program FilesMicrosoft Visual Studio 9.0Common7IDEstesthost.exe'
'vstesthost.exe' (Managed): Loaded 'C:WINDOWSssemblyGAC_MSILSystem.Runtime.Remoting.0.0.0__b77a5c561934e089System.Runtime.Remoting.dll'
'vstesthost.exe' (Managed): Loaded 'C:Program FilesMicrosoft Visual Studio 9.0Common7IDEPrivateAssembliesMicrosoft.VisualStudio.QualityTools.Common.dll'
'vstesthost.exe' (Managed): Loaded 'C:WINDOWSssemblyGAC_MSILSystem.0.0.0__b77a5c561934e089System.dll'
'vstesthost.exe' (Managed): Loaded 'C:Program FilesMicrosoft Visual Studio 9.0Common7IDEPrivateAssembliesMicrosoft.VisualStudio.QualityTools.ExecutionCommon.dll'
'vstesthost.exe' (Managed): Loaded 'C:WINDOWSssemblyGAC_MSILTypeMock.2.5.0__3dae460033b8d8e2TypeMock.dll'
'vstesthost.exe' (Managed): Loaded 'C:WINDOWSssemblyGAC_MSILTypemock.Interceptors.2.5.0__3dae460033b8d8e2Typemock.Interceptors.dll'
'vstesthost.exe' (Managed): Loaded 'C:WINDOWSssemblyGAC_MSILMicrosoft.VisualStudio.QualityTools.Resource9.0.0.0__b03f5f7f11d50a3aMicrosoft.VisualStudio.QualityTools.Resource.dll'
'vstesthost.exe' (Managed): Loaded 'C:WINDOWSssemblyGAC_MSILSystem.Configuration.0.0.0__b03f5f7f11d50a3aSystem.Configuration.dll'
'vstesthost.exe' (Managed): Loaded 'C:WINDOWSssemblyGAC_MSILSystem.Xml.0.0.0__b77a5c561934e089System.Xml.dll'
'vstesthost.exe' (Managed): Loaded 'C:Program FilesMicrosoft Visual Studio 9.0Common7IDEPrivateAssembliesMicrosoft.VisualStudio.QualityTools.ControllerObject.dll'
'vstesthost.exe' (Managed): Loaded 'C:WINDOWSssemblyGAC_32System.Data.0.0.0__b77a5c561934e089System.Data.dll'
'vstesthost.exe' (Managed): Loaded 'C:Program FilesMicrosoft Visual Studio 9.0Common7IDEPrivateAssembliesMicrosoft.VisualStudio.QualityTools.AgentObject.dll'
'vstesthost.exe' (Managed): Loaded 'C:WINDOWSssemblyGAC_32System.Web.0.0.0__b03f5f7f11d50a3aSystem.Web.dll'
'vstesthost.exe' (Managed): Loaded 'C:Program FilesMicrosoft Visual Studio 9.0Common7IDEPrivateAssembliesMicrosoft.VisualStudio.QualityTools.Tips.UnitTest.ObjectModel.dll'
'vstesthost.exe' (Managed): Loaded 'C:WINDOWSssemblyGAC_MSILMicrosoft.VisualStudio.QualityTools.UnitTestFramework9.0.0.0__b03f5f7f11d50a3aMicrosoft.VisualStudio.QualityTools.UnitTestFramework.dll'
The thread 0x818 has exited with code 0 (0x0).
'vstesthost.exe' (Managed): Loaded 'C:Program FilesMicrosoft Visual Studio 9.0Common7IDEPrivateAssembliesMicrosoft.VisualStudio.QualityTools.Tips.UnitTest.Adapter.dll'
'vstesthost.exe' (Managed): Loaded 'C:Program FilesMicrosoft Visual Studio 9.0Common7IDEPrivateAssembliesMicrosoft.VisualStudio.QualityTools.Tips.UnitTest.AssemblyResolver.dll'
'vstesthost.exe' (Managed): Loaded 'C:Documents and Settings ajusiMy DocumentsVisual Studio 2008ProjectsPhase2CXM.BECUTestResults ajusi_WS-39700 2012-03-05 07_46_56OutTestProject1.dll', Symbols loaded.
'vstesthost.exe' (Managed): Loaded 'C:Documents and Settings ajusiMy DocumentsVisual Studio 2008ProjectsPhase2CXM.BECUTestResults ajusi_WS-39700 2012-03-05 07_46_56OutTypemock.ArrangeActAssert.dll'
'vstesthost.exe' (Managed): Loaded 'C:WINDOWSssemblyGAC_MSILConfiguration.2.5.0__3dae460033b8d8e2Configuration.dll'
'vstesthost.exe' (Managed): Loaded 'C:WINDOWSssemblyGAC_32CXM.Rudder.DataModel.0.0.35__89cd864dc3276342CXM.Rudder.DataModel.dll'
'vstesthost.exe' (Managed): Loaded 'C:Documents and Settings ajusiMy DocumentsVisual Studio 2008ProjectsPhase2CXM.BECUTestResults ajusi_WS-39700 2012-03-05 07_46_56OutCXM.BECU.DataModel.dll', Symbols loaded.
'vstesthost.exe' (Managed): Loaded 'C:Documents and Settings ajusiMy DocumentsVisual Studio 2008ProjectsPhase2CXM.BECUTestResults ajusi_WS-39700 2012-03-05 07_46_56OutCXM.BECU.Activity.dll', Symbols loaded.
'vstesthost.exe' (Managed): Loaded 'C:WINDOWSssemblyGAC_32SOAdesk.SUDS.Rudder.Workflow.Shared.0.0.35__89cd864dc3276342SOAdesk.SUDS.Rudder.Workflow.Shared.dll'
'vstesthost.exe' (Managed): Loaded 'C:WINDOWSssemblyGAC_MSILSystem.Workflow.ComponentModel.0.0.0__31bf3856ad364e35System.Workflow.ComponentModel.dll'
'vstesthost.exe' (Managed): Loaded 'C:WINDOWSssemblyGAC_32SOAdesk.Framework.0.0.35__89cd864dc3276342SOAdesk.Framework.dll'
'vstesthost.exe' (Managed): Loaded 'C:WINDOWSssemblyGAC_32CXM.Rudder.Shared.0.0.35__89cd864dc3276342CXM.Rudder.Shared.dll'
'vstesthost.exe' (Managed): Loaded 'C:WINDOWSssemblyGAC_MSILSystem.Core.5.0.0__b77a5c561934e089System.Core.dll'
'vstesthost.exe' (Managed): Loaded 'C:WINDOWSssemblyGAC_MSILWindowsBase.0.0.0__31bf3856ad364e35WindowsBase.dll'
'vstesthost.exe' (Managed): Loaded 'C:WINDOWSssemblyGAC_MSILSystem.Windows.Forms.0.0.0__b77a5c561934e089System.Windows.Forms.dll'
'vstesthost.exe' (Managed): Loaded 'C:WINDOWSssemblyGAC_MSILSystem.Drawing.0.0.0__b03f5f7f11d50a3aSystem.Drawing.dll'
'vstesthost.exe' (Managed): Loaded 'C:WINDOWSssemblyGAC_MSILMicrosoft.VisualStudio.Debugger.Runtime9.0.0.0__b03f5f7f11d50a3aMicrosoft.VisualStudio.Debugger.Runtime.dll'
'vstesthost.exe' (Managed): Loaded 'C:WINDOWSssemblyGAC_MSILSystem.Workflow.Runtime.0.0.0__31bf3856ad364e35System.Workflow.Runtime.dll'
A first chance exception of type 'System.NullReferenceException' occurred in mscorlib.dll
A first chance exception of type 'System.NullReferenceException' occurred in Typemock.ArrangeActAssert.dll
A first chance exception of type 'System.NullReferenceException' occurred in TypeMock.dll
The thread 0x500 has exited with code 0 (0x0).
'vstesthost.exe' (Managed): Loaded 'pe7s4lwx'
The thread 'Agent: adapter run thread for test 'TestActivity' with id 'caf2300e-0ae7-4d2c-b50d-98e30fd562da'' (0x1bb8) has exited with code 0 (0x0).
The thread 0x11d4 has exited with code 0 (0x0).
The thread 0x1894 has exited with code 0 (0x0).
The thread 0x1dd0 has exited with code 0 (0x0).
The program '[3380] vstesthost.exe: Managed' has exited with code 0 (0x0).

Application code:

namespace CXM.BECU.Activity.Activities.Composites.TravelNotifications
{
public class TNMapRelationshipInfo : CXMActivityBase
{
/// <summary>
/// Please insert all activity code in this method
/// </summary>
protected override System.Workflow.ComponentModel.ActivityExecutionStatus ExecuteSurfaceMethod(System.Workflow.ComponentModel.ActivityExecutionStatus status)
{
//Relationship is populated with sample data for now. Once SFM is ready to get the relationships, this code should be modified accordingly to get from SFM objects.
List<PrimaryRelationshipClass> primaryRelationshipData = new List<PrimaryRelationshipClass>();

UDM.Interaction.PrimaryMember.PrimaryRelationships.Clear(); >>>>>>> This is line 27

The above function is getting called from test Activity project to invoke the appliation code.. as below..


public void TestActivity()
{

CXMActivityBase fakeActivityBase = Isolate.Fake.Instance<CXMActivityBase>(Members.ReturnRecursiveFakes, ConstructorWillBe.Ignored);
Isolate.Swap.NextInstance<CXMActivityBase>().With(fakeActivityBase);

CXM.Rudder.DataModel.RudderDataModel<InteractionClass> fakeUDM = Isolate.Fake.Instance<CXM.Rudder.DataModel.RudderDataModel<InteractionClass>>(Members.ReturnRecursiveFakes, ConstructorWillBe.Ignored);
Isolate.Swap.NextInstance<CXM.Rudder.DataModel.RudderDataModel<InteractionClass>>().With(fakeUDM);

CXM.Rudder.DataModel.InteractionDataModel fakeInteraction = Isolate.Fake.Instance<CXM.Rudder.DataModel.InteractionDataModel>();
Isolate.Swap.NextInstance<CXM.Rudder.DataModel.InteractionDataModel>().With(fakeInteraction);

CXM.BECU.DataModel.InteractionClass fakeInteractionClass = Isolate.Fake.Instance<CXM.BECU.DataModel.InteractionClass>();
Isolate.Swap.NextInstance<CXM.BECU.DataModel.InteractionClass>().With(fakeInteractionClass);

CXM.BECU.DataModel.PrimaryMemberClass fakeprimaryM = Isolate.Fake.Instance<CXM.BECU.DataModel.PrimaryMemberClass>();
Isolate.Swap.NextInstance<CXM.BECU.DataModel.PrimaryMemberClass>().With(fakeprimaryM);

CXM.BECU.DataModel.PrimaryRelationshipClass fakeprimaryR = Isolate.Fake.Instance<CXM.BECU.DataModel.PrimaryRelationshipClass>();
Isolate.Swap.NextInstance<CXM.BECU.DataModel.PrimaryRelationshipClass>().With(fakeprimaryR);
Isolate.Swap.AllInstances<PrimaryMemberClass>().With(fakeprimaryM);
Isolate.Swap.AllInstances<PrimaryRelationshipClass>().With(fakeprimaryR);

CXM.BECU.Activity.Activities.Composites.TravelNotifications.TNMapRelationshipInfo fakeTNMapRelationshipObject = Isolate.Fake.Instance<CXM.BECU.Activity.Activities.Composites.TravelNotifications.TNMapRelationshipInfo>(Members.ReturnRecursiveFakes, ConstructorWillBe.Ignored);
Isolate.NonPublic.WhenCalled(fakeTNMapRelationshipObject, "ExecuteSurfaceMethod").CallOriginal();

Isolate.WhenCalled(() => fakeActivityBase.UDM).WillReturn(fakeUDM);
Isolate.WhenCalled(() => fakeUDM.Interaction).WillReturn(fakeInteractionClass);
Isolate.WhenCalled(() => fakeInteractionClass.PrimaryMember).WillReturn(fakeprimaryM);

CXM.Rudder.DataModel.RudderDataClassCollection<PrimaryRelationshipClass> primaryRe =
new CXM.Rudder.DataModel.RudderDataClassCollection<PrimaryRelationshipClass>(fakeInteractionClass.PrimaryMember, string.Format("PrimaryRelationships"));

PrimaryRelationshipClass primaryRelation =
new PrimaryRelationshipClass(fakeActivityBase.UDM.Interaction.PrimaryMember, string.Format("PrimaryRelationships"));
primaryRe.Add(primaryRelation);

Isolate.WhenCalled(() => fakeprimaryM.PrimaryRelationships).WillReturn(primaryRe);

var result = Isolate.Invoke.Method(fakeTNMapRelationshipObject, "ExecuteSurfaceMethod", System.Workflow.ComponentModel.ActivityExecutionStatus.Executing);

Isolate.Verify.NonPublic.WasCalled(fakeTNMapRelationshipObject, "ExecuteSurfaceMethod").WithArguments(System.Workflow.ComponentModel.ActivityExecutionStatus.Initialized);

}

ok,
first some tips:
:arrow: Members.ReturnRecursiveFakes, ConstructorWillBe.Ignored is the default, no need to be explicit

:arrow: What are you testing? it seems that you first call ExecuteSurfaceMethod and then verify that it was called, which it obviously has

:arrow: It seems that you are faking CXMActivityBase to fake the base of TNMapRelationshipInfo, this doesn't work, actually - there is also no need - once you fake the derived class - you have also faked the base class.

:arrow: I am not 100% sure but this code should work:

// Do you really need this?
var fakeInteraction = Isolate.Fake.Instance<CXM.Rudder.DataModel.InteractionDataModel>();
Isolate.Swap.NextInstance<CXM.Rudder.DataModel.InteractionDataModel>().With(fakeInteraction);

// create class undertest    
var fakeTNMapRelationshipObject = Isolate.Fake.Instance<CXM.BECU.Activity.Activities.Composites.TravelNotifications.TNMapRelationshipInfo>();
Isolate.NonPublic.WhenCalled(fakeTNMapRelationshipObject,"ExecuteSurfaceMethod").CallOriginal();

// Add relationship
var primaryRe = new CXM.Rudder.DataModel.RudderDataClassCollection<PrimaryRelationshipClass>(fakeTNMapRelationshipObject.UDM.Interaction.PrimaryMember, string.Format("PrimaryRelationships"));

PrimaryRelationshipClass primaryRelation =
new PrimaryRelationshipClass(fakeTNMapRelationshipObject.UDM.Interaction.PrimaryMember, string.Format("PrimaryRelationships"));
primaryRe.Add(primaryRelation);

// make sure our code will return the relationship. Note we are chaining the calls - cool!
Isolate.WhenCalled(()=>Isolate.WhenCalled(() =>fakeTNMapRelationshipObject.UDM.Interaction.PrimaryMember.PrimaryRelationships)
    .WillReturn(primaryRe);
  

// Act
var result = Isolate.Invoke.Method(fakeTNMapRelationshipObject, "ExecuteSurfaceMethod", System.Workflow.ComponentModel.ActivityExecutionStatus.Executing);

// Assert?
Isolate.Verify.NonPublic.WasCalled(fakeTNMapRelationshipObject, "ExecuteSurfaceMethod").WithArguments(System.Workflow.ComponentModel.ActivityExecutionStatus.Initialized);

if PrimaryRelationships is settable you can use:

fakeTNMapRelationshipObject.UDM.Interaction.PrimaryMember.PrimaryRelationships = primaryRe

if UDM is not visible use:

// grab UDM, will be fake as fakeTNMapRelationshipObject is fake
CXM.Rudder.DataModel.RudderDataModel<InteractionClass>> fakeUDM = Isolate.Invoke.Method(fakeTNMapRelationshipObject,"get_UDM");
// make sure our code will return the relationship. Note we are chaining the calls - cool!
Isolate.WhenCalled(()=>fakeUDM.Interaction.PrimaryMember.PrimaryRelationships).WillReturn(primaryRe);