I ended up using the following:
using System;
using Castle.MicroKernel.Registration;
using Castle.Windsor;
using Microsoft.VisualStudio.TestTools.UnitTesting;
namespace GPI.REST.UnitTest
{
public interface IMyContext
{
string subtype { get; set; }
}
public class MyContext : IMyContext
{
public string subtype { get; set; }
}
public interface IMyExporter
{
string Export();
}
public class MyExporterXML : IMyExporter
{
public string Export()
{
return "XML Data";
}
}
public class MyExporterJson : IMyExporter
{
public string Export()
{
return "JSON Data";
}
}
public class MyExporterFactory
{
private IMyContext context;
public MyExporterFactory(IMyContext context)
{
this.context = context;
}
public Func<IMyExporter> Create()
{
return () =>
{
if (context.subtype == "XML")
return new MyExporterXML();
return new MyExporterJson();
};
}
}
public class MyService
{
private readonly Func<IMyExporter> exporter;
public MyService(Func<IMyExporter> exporter)
{
this.exporter = exporter;
}
public string Extractdata()
{
return exporter().Export();
}
}
[TestClass]
public class UnitTest2
{
public Func<IMyExporter> CreateExporter()
{
Func<IMyExporter> smo = null;
return smo;
}
[TestMethod]
public void TestMethod1()
{
// Arrange
var container = new WindsorContainer();
container.Register(Component.For<IMyContext>().ImplementedBy<MyContext>());
container.Register(Component.For<MyService>());
container.Register(Component.For<MyExporterFactory>());
container.Register(Component.For<Func<IMyExporter>>().UsingFactoryMethod(kernel
=> kernel.Resolve<MyExporterFactory>().Create()));
var context = container.Resolve<IMyContext>();
var service = container.Resolve<MyService>();
// Act
context.subtype = "JSON";
var resultJson = service.Extractdata();
context.subtype = "XML";
var resultXml = service.Extractdata();
// Assert
Assert.AreEqual(resultJson, "JSON Data");
Assert.AreEqual(resultXml, "XML Data");
}
}
}
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