public void Can_Callback_OnReturn_And_Replace_Return_Value()
{
var foo = new Foo();
var proxy = new Proxy<IFoo>()
.Intercept(f => f.Return())
.OnInvoke(mi => foo.Return())
.OnReturn((mi, r) => r.Equals(1) ? -1 : -2)
.Save();
Assert.Equal(-1, proxy.Return());
Assert.True(foo.WasExecuted);
}