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Editorial Team
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Asked: 2026-05-28T00:37:39+00:00

I’m using the WCFMock to mock the WebOperationContext in my web service. The only

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I’m using the WCFMock to mock the WebOperationContext in my web service. The only usage is to add a custom HTTP header to the WebOperationContext.Current.OutgoingResponse.Headers collection. I’m unable to verify this using Moq. What I’ve already tried:

  • Verify if the Add method is getting invoked. This fails because Add is not virtual
  • Try to access the header directly from MockedWebOperationContext.Current. This is always zero in number

How can I verify in my unit test case that a custom header has been added?

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  1. Editorial Team

    Figured it out. Here’s the solution for posterity.

    When we create the “moq mock” for the IWebOperationContext, the example suggests that we set the property DefaultValue = DefaultValue.Mock. This will mock all dependincies including the HttpHeaders collection. I skipped this and mocked the OutgoingWebResponseContext to return a WebHeaderCollection. For my test case I simply assert on this collection.

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