Search code examples
c#moqcastle-dynamicproxy

FileNotFoundException when creating a proxy object using Moq and Castle

I have a base abstract class that exists in a nuget package that I am implementing a concrete class for, something like this:

public class MyConcreteClass : MyBaseAbstractClass<SomeType> {

  public MyConcreteClass(IAnInterfaceOne interfaceOne, IAnInterfaceTwo interfaceTwo) : base(interfaceOne, interfaceTwo) { }

}

I am mocking the two parameters like so:

var mockFirst = new Mock<IAnInterfaceOne>();
var mockSecond = new Mock<IAnInterfaceTwo>();

and the concrete class like so:

var mockConcrete = new Mock<MyConcreteClass>(mockFirst.Object, mockSecond.Object);

When I try to access the Object property within mockConcrete

var concreteObjectInstance = mockConcrete.Object

I get a FileNotFoundException, Could not load file or assembly 'Serilog.dll' and the debugger in VS points to the base constructor call for where the exception is coming from:

base(interfaceOne, interfaceTwo)

Castle.Core and Moq versions:

<package id="Castle.Core" version="3.3.3" targetFramework="net452" />
<package id="Moq" version="4.5.21" targetFramework="net452" />

I have searched through the nuget package where the base class resides in and there are no references or usages of serilog. I searched Castle.Core's repo and found many usages of serilog which I believe is a logging library. So I am a bit confused on how this exception is occuring and how I can try to resolve it so it does not throw the exception when I mock my object.

Solution

  • After digging through I found the cause of the problem. It actually is not related to castle or moq. It was actually caused by Metrics.NET which is a nuget package being referenced in MyBaseAbstractClass<T>. This line was in the base class:

    private readonly Metrics.Timer _callTimer = Metric.Timer("", Unit.Calls, SamplingType.LongTerm, TimeUnit.Milliseconds);

    and the exception was being thrown every time the base class was initialized on that line. I looked at the packages Metrics.NET was referencing and saw LibLog. So I looked into LibLog and saw it was referencing Serilog. So I am not sure why Serilog cannot be found within those packages still, but I removed the line throwing the exception since it was unused anyways and also removed the Metrics.NET package. I am answering my question to make sure people know it is not a problem with Castle or Moq like I originally thought it was.