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How to Mock OperationContext

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Gopala
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Gopala asked on 18 Apr 2013, 01:51 AM
Hi there,
I am testing method that inserts data into a table in the database and returns the ID.
My class(not the test class business logic class) is no way related to any wcf service but after inserting data my method calling context.savechanges() method then its validating my credentials. For the validation I have validation.cs. There its checking the headers
in the operation context. Is there anyway to get around the OperationContext. I am using JustMock 30 day Trial version. I tried the following code

 IContextChannel channel = null;

            var context = Mock.Create<OperationContext>(()=>new OperationContext(channel));
            OperationContext.Current = context;
            MessageHeader header = MessageHeader.CreateHeader(CustomHeader.Header, CustomHeader.HeaderNamespace, customHeader);
            Mock.Arrange(() => context.OutgoingMessageHeaders.Add(header));
I have been trying to solve this for the last 2 days.
Thank so much for ur help in advance

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Kaloyan
Telerik team
answered on 18 Apr 2013, 12:54 PM
Hi Gopala,

Thank you for contacting Telerik support.

To show you how "OperationContext" can be faked with JustMock, I prepared the following example:
[TestMethod]
public void ShouldMockOperationContextClass()
{
    // Arrange
    var mock = Mock.Create<OperationContext>(Constructor.Mocked);
 
    Mock.Arrange(() => mock.SessionId).Returns("Telerik"); // Will arrange the "SessionId" property to return certain string ("Telerik").
    Mock.Arrange(() => OperationContext.Current).Returns(mock); // Will arrange the static "OperationContext.Current" to return mocked instance when called.
     
    // Act
    var actual = OperationContext.Current.SessionId;
 
    // Assert
    Assert.AreEqual("Telerik", actual); // Will assert the expected results
}
I hope the above helps.

However, to assist you further with your certain scenario, I will need a sample project with the system under test. You can archive and attach it with your next message.

You could also check our online help documentation. There are a lot of mocking examples, that should help.  

Regards,
Kaloyan
the Telerik team
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Gopala
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answered on 19 Apr 2013, 12:01 AM
Hi there thank you so much for your help.
It didn't really solve my problem. Please look at the following code:

My TestClass

[TestClass()]
 public class ClientTest
{
private static Service.CustomHeader customHeader = new CustomHeader { clientId = 3, userId = 1 };
[ClassInitialize()]
        public static void MyClassInitialize(TestContext testContext)
        {
            var header = MessageHeader.CreateHeader(CustomHeader.HeaderXXXCustomHeader, CustomHeader.HeaderNamespace, customHeader);
            var context = Mock.Create<OperationContext>(Constructor.Mocked);           
            Mock.Arrange(() =>OperationContext.Current).Returns(context);
            Mock.Arrange(()=>context.OutgoingMessageHeaders.Add(header));
}

[TestMethod()]
        public void InsertTest()
        {
            
            int clientId = 0;
            DataObjects.Client client = new DataObjects.Client(); // TODO: Initialize to an appropriate value
            client.IsActive = true;
            client.Name = "TestInsertClient";
            client.Description = "InsertTest Test Client desc";

            clientId = new DataSources.Client().Insert(client);

            Assert.IsNotNull(clientId);

        }
}

My Business Logic Class

namespace DataSources
 public class Client
 {
public int Insert(DataObjects.Client client)
        {
            try
            {             

                using (var context = new TestEntities())
                {
                    context.ContextOptions.ProxyCreationEnabled = false;
                    context.Clients.AddObject(client);
                    context.ObjectStateManager.ChangeObjectState(client, EntityState.Added);
                    context.SaveChanges();

                    return client.ClientId;
                }
            }
            catch (Exception ex)
            {
                throw new Exception(new ExceptionDefinition(ex.Message, ex));
            }
        }
}

My Validation.cs
public partial class TestEntities
    {     
        public override int SaveChanges(SaveOptions options)
        {
            foreach (ObjectStateEntry entry in ObjectStateManager.GetObjectStateEntries(EntityState.Added | EntityState.Modified))
            {
                entry.CurrentValues.SetValue(entry.CurrentValues.GetOrdinal("ChangedBy"), OperationContext.Current.IncomingMessageHeaders.GetHeader<Service.CustomHeader>(Service.CustomHeader.HeaderCustomHeader, Service.CustomHeader.HeaderNamespace).userId);
                entry.CurrentValues.SetValue(entry.CurrentValues.GetOrdinal("ChangedDateTime"), DateTime.Now);
            }

            return base.SaveChanges(options);
        }

    }

The above is my whole lot of code.

When i tried to run test I was getting "Object reference not set an instance of an object"
What I want to do I want to mock OperationContext in my Test Class Intialize and I want to add header to the OperationContext.
Thank you so much for your help.
0
Kaloyan
Telerik team
answered on 19 Apr 2013, 03:00 PM
Hi again Gopala,

Thank you for the code provided.

However, is it possible for you to wrap it in a compiling project with all the references needed. You could attach it to your next ticket. This will let us investigate the issue much faster and accordingly solve it.

Thank you for the understanding.

Greetings,
Kaloyan
the Telerik team
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Gopala
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Kaloyan
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Gopala
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